Method Statement - D200 Expressway Crossing by HDD and Pipe Ramming - English
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Transcript of Method Statement - D200 Expressway Crossing by HDD and Pipe Ramming - English
METHOD STATEMENT
D200 PIPELINE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
*************
LOCATION: HCMC – DAU GIAY EXPRESSWAY
DOCUMENT NO.: DTS – HDD.07/15
A 10/04/15 Issued for Approval
REV DATE DESCRIPTION BY CHECK APPROVED CLIENT CA
This document and information contained in it is the sole property of DTS and may not be exploited, used, copied duplicated or reproduced in
any form or medium whatever without the prior permission of DTS.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 2
INDEX
CHAPTER I - GENERAL I.1. Responsibility ............................................................................................... page 05
I.2. Project description ........................................................................................ page 05
I.3. Project scope of work ................................................................................... page 06
CHAPTER II - METHODOLOGIES
II.1. WORK ANALYSIS .................................................................................... page 07
II.1.1. Site survey and considerations ................................................................ page 07
II.1.2. Potential problem and solution ................................................................. page 08
II.2. PREPARATION.......................................................................................... page 10
II.2.1. Equipment, tools, material and consumables ........................................... page 10
II.2.2. Site organization ....................................................................................... page 11
II.2.2.1. Organization chart ................................................................................. page 11
II.2.2.2. Personnel’s job description ................................................................... page 12
II.3. HORIZONTAL DIRECTIONAL DRILLING (HDD) ............................... page 15
II.3.1. Pilot drilling .............................................................................................. page 15
II.3.2. Drill path and drilled hole size ................................................................. page 16
II.3.3. Drilling fluid ............................................................................................. page 17
II.3.3.1. Drilling fluid function ........................................................................... page 17
II.3.3.2. Mixing procedure .................................................................................. page 17
II.3.3.3. Original ...................................................................................................page 17
II.4. PIPE RAMMING ........................................................................................ page 17
II.4.1. Setting up .................................................................................................. page 17
II.4.2. Pipe ramming technique ........................................................................... page 18
II.4.3. Main parts and functions of pipe ramming hammer system .................... page 21
II.4.3.1. Main parts .............................................................................................. page 21
II.4.3.2. Main functions ....................................................................................... page 22
II.4.3.3. Soil cleaning .......................................................................................... page 23
II.4.3.4. Pneumatic pipe ramming hammer structure .......................................... page 24
II.4.3.5. Pipe ramming hammer selection ........................................................... page 24
II.4.3.6. Requirement for steel product pipe ....................................................... page 25
II.4.3.6.1. Pipe outside cleaning .......................................................................... page 25
II.4.3.6.2. Wall thickness .................................................................................... page 25
II.5. EARTH/FOUNDATION WORK FOR DRILLING EQUIPMENT .......... page 26
II.5.1. Earth work in flat ground ......................................................................... page 26
II.5.2. Earth/foundation work in road shoulder ................................................... page 26
II.6. OVERCOMING ACTIONS WHEN DRILLING/RAMMING PROBLEMpage27
CHAPTER III - WORK PLAN
III.1. SUGGESTED ACTIVITIES ..................................................................... page 28
Crossing No.1 Km0+100, Pk4-ITS008-G-111-D: 44m ...................................... page 28
Crossing No.2 Km0+140, Pk4-ITS008-G-111-D: 45m ...................................... page 29
Crossing No.3 Km0+720, Pk4-ITS008-G-112-D: 18m ...................................... page 30
Crossing No.4 Km4+000, Pk4-ITS008-G-117-D: 33m ...................................... page 31
Crossing No.5 Km6+150, Pk4-ITS008-G-121-D: 19m ...................................... page 32
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 3
Crossing No.6 Km10+920, Pk4-ITS008-G-128-D: 22m .................................... page 33
Crossing No.7 Km11+400, Pk4-ITS008-G-129-D: 30m .................................... page 34
Crossing No.8 Km14+500, Pk4-ITS008-G-211-D: 22m .................................... page 35
Crossing No.9 Km22+380, Pk4-ITS008-G-222-D: 19m .................................... page 36
Crossing No.10 Km22+720, Pk4-ITS008-G-223-D: 16m .................................. page 37
Crossing No.11 Km22+800, Pk4-ITS008-G-223-D: 20m .................................. page 38
Crossing No.12 Km23+230, Pk4-ITS008-G-224-D: 47m .................................. page 39
Crossing No.13 Km23+270, Pk4-ITS008-G-224-D: 40m .................................. page 40
Crossing No.14 Km23+330, Pk4-ITS008-G-224-D (1): 60m ............................ page 41
Crossing No.15 Km23+330, Pk4-ITS008-G-224-D (2): 46m ............................ page 42
Crossing No.16 Km23+445, Pk4-ITS008-G-224-D: 24m .................................. page 43
Crossing No.17 Km23+790, Pk4-ITS008-G-224-D: 16m .................................. page 44
Crossing No.18 Km24+110, Pk4-ITS008-G-311-D: 16m .................................. page 45
Crossing No.19 Km24+950, Pk4-ITS008-G-312-D: 21m .................................. page 46
Crossing No.20 Km34+500, Pk4-ITS008-G-326-D: 24m .................................. page 47
Crossing No.21 Km34+615, Pk4-ITS008-G-326-D: 28m .................................. page 48
Crossing No.22 Km37+200, Pk4-ITS008-G-330-D: 30m .................................. page 49
Crossing No.23 Km40+940, Pk4-ITS008-G-416-D (1): 27m ............................ page 50
Crossing No.24 Km40+940, Pk4-ITS008-G-416-D (1): 29m ............................ page 51
Crossing No.25 Km41+360, Pk4-ITS008-G-417-D: 30m .................................. page 52
Crossing No.26 Km43+650, Pk4-ITS008-G-421-D: 20m .................................. page 53
Crossing No.27 Km43+870, Pk4-ITS008-G-421-D: 20m .................................. page 54
Crossing No.28 Km45+250, Pk4-ITS008-G-423-D: 21m .................................. page 55
Crossing No.29 Km49+000, Pk4-ITS008-G-429-D: 16m .................................. page 56
Crossing No.30 Km49+250, Pk4-ITS008-G-429-D (1): 19m ............................ page 57
Crossing No.31 Km49+250, Pk4-ITS008-G-429-D (2): 16m ............................ page 58
Crossing No.32 Km52+170, Pk4-ITS008-G-434-D: 18m .................................. page 59
Crossing No.33 Km52+430, Pk4-ITS008-G-434-D (1): 18m ............................ page 60
Crossing No.34 Km52+430, Pk4-ITS008-G-434-D (2): 18m ............................ page 61
Crossing No.35 Km54+500, Pk4-ITS008-G-438-D: 32m .................................. page 62
Crossing No.36 Km54+920, Pk4-ITS008-G-440-D: 19m .................................. page 63
Crossing No.37 Km54+980, Pk4-ITS008-G-441-D: 43m .................................. page 64
III.2. WORK PLAN ............................................................................................ page 65
CHAPTER IV - SAFETY CONTROL
IV.1. Personnel check ......................................................................................... page 70
IV.1.1. Personality check .................................................................................... page 70
IV.1.2. Protection check ...................................................................................... page 70
IV.2. Working base check ................................................................................... page 70
IV.2.1. Working trench check ............................................................................. page 70
IV.2.2. Foundation check .................................................................................... page 70
IV.3. Equipment/tools check ............................................................................... page 71
IV.3.1. Function check ........................................................................................ page 71
IV.3.2. Protection check ...................................................................................... page 71
IV.4. Material/consumables check ...................................................................... page 71
IV.4.1. Protection check ...................................................................................... page 71
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 4
IV.5. RISK ASSESSMENT ................................................................................ page 71
IV.5. SET UP AND MAINTAIN SAFETY ....................................................... page 73
CHAPTER V - QUALITY CONTROL
V.1. Document control ........................................................................................ page 74
V.2. Material/consumables control ..................................................................... page 74
V.3. Equipment/tools control .............................................................................. page 74
V.4. Drilling/ramming control ............................................................................ page 75
V.5. Welding work control.................................................................................. page 75
Table 1 – Working locations ............................................................................... page 06
Table 2 – Existing and consideration ................................................................. page 07
Table 3 – Potential problem and solution ........................................................... page 09
Table 4 – List of equipment, tools, material and consumables ........................... page 11
Table 5 – Plan for a crossing .............................................................................. page 66
Table 6 – Project general plan ........................................................................... page 68
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 5
CHAPTER I
GENERAL
I.1. Responsibility
- Employer: Vietnam Expressway Corporation (VEC).
- Contractor: Toshiba & Hitachi & Itochu Joint Venture.
- Drilling sub-contractor: Deltatech JSC.
I.2. Project description
Drilling sub-contractor required to install D200 galv. steel pipes across HCM –
Long Thanh – Dau Giay expressway at locations as in following table:
No. Position, reference
drawing unit Q’ty No.
Position, reference
drawing unit Q’ty
01 Km0+100, Pk4-
ITS008-G-111-D M 44 20
Km34+500, Pk4-
ITS008-G-326-D m 24
02 Km0+140, Pk4-
ITS008-G-111-D M 45 21
Km34+615, Pk4-
ITS008-G-326-D m 28
03 Km0+720, Pk4-
ITS008-G-112-D M 18 22
Km37+200, Pk4-
ITS008-G-330-D m 30
04 Km4+000, Pk4-
ITS008-G-117-D M 33 23
Km40+940, Pk4-
ITS008-G-416-D (1) m 27
05 Km6+150, Pk4-
ITS008-G-121-D M 19 24
Km40+940, Pk4-
ITS008-G-416-D (2) m 29
06 Km10+920, Pk4-
ITS008-G-128-D M 22 25
Km41+360, Pk4-
ITS008-G-417-D m 30
07 Km11+400, Pk4-
ITS008-G-129-D M 30 26
Km43+650, Pk4-
ITS008-G-421-D m 20
08 Km14+500, Pk4-
ITS008-G-211-D M 22 27
Km43+870, Pk4-
ITS008-G-421-D m 20
09 Km22+380, Pk4-
ITS008-G-222-D M 19 28
Km45+250, Pk4-
ITS008-G-423-D m 21
10 Km22+720, Pk4-
ITS008-G-223-D M 16 29
Km49+000, Pk4-
ITS008-G-429-D m 16
11 Km22+800, Pk4- M 20 30 Km49+250, Pk4- m 19
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 6
ITS008-G-223-D ITS008-G-429-D (1)
12 Km23+230, Pk4-
ITS008-G-224-D M 47 31
Km49+250, Pk4-
ITS008-G-429-D (2) m 16
13 Km23+270, Pk4-
ITS008-G-224-D M 40 32
Km52+170, Pk4-
ITS008-G-434-D m 18
14 Km23+330, Pk4-
ITS008-G-224-D (1) M 60 33
Km52+430, Pk4-
ITS008-G-434-D (1) m 18
15 Km23+330, Pk4-
ITS008-G-224-D (2) M 46 34
Km52+430, Pk4-
ITS008-G-434-D (2) m 18
16 Km23+445, Pk4-
ITS008-G-224-D M 24 35
Km54+500, Pk4-
ITS008-G-438-D m 32
17 Km23+790, Pk4-
ITS008-G-224-D M 16 36
Km54+920, Pk4-
ITS008-G-440-D m 19
18 Km24+110, Pk4-
ITS008-G-311-D M 16 37
Km54+980, Pk4-
ITS008-G-441-D m 43
19 Km24+950, Pk4-
ITS008-G-312-D M 21
Table 1 – Working locations
I.3. Project scope of work
D200 galv. steel pipes installed by a combination technique, which horizontal
directional drilling (HDD) done first to get the exact way and pipe ramming
will followed then to insert D200 pipe to complete installation work. Generally,
D200 pipe will go across the expressway at -2m level from road surface.
However, in some cases the pipes can be go lower than that level for safety
requirement:
+ Number of crossing: 37
+ Total length: 986m
+ Construction site condition: As survey.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 7
CHAPTER II
METHODOLOGIES
II.1. WORK ANALYSIS
II.1.1. Site survey and considerations
Site survey report done by Deltatech’s survey team shows soil condition, obstacles,
adjacent constructions, site entrance,… at every crossing so that drilling team can
decide suitable construction methods after consideration for each crossing as
following table:
Existing Consideration
1. Drill length From 16m to 60m (as
designed)
Technique shall be applied:
*1st step: Horizontal
directional drilling (HDD)
*2nd
step: Pipe ramming
2. Drill depth -2m min. (as designed) Keep deeper than road layer
3. Ground structure
*0-2m: road structure
*1.2-2m: filled material
(sand, soil, gravel,…)
*>2m: natural soil, with
stone or gravel at some
crossings
Carefully survey to get
essential information for
drilling procedure
4. Adjacent
constructions
Asphan road layer, road
shoulder, safety fence
*Keep drill path at a safe
distance
*Safety supervision at all time
5. At-site electric No Generator shall be mobilized
6. At-site fresh water No Mobile water tanker required
7. Dumping area No Move to required place
8. Entrance Limited From expressway
9. Accommodation No Set up mobile camp
Table 2 – Existing and consideration
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 8
II.1.2. Potential problem and solution
Drilling team’s discussions focus on site existing objects done to point out potential
problem and solution as Table 3 – Potential problem and solution. Major concerns are
the following:
- Keeping safe for all working activities.
- Mobilization and demobilization shall be in time.
- Maximizing working time in raining days.
Safety and management help to control drilling work so that the following
requirements can be satisfied:
- Drilling equipments shall be set up on adequate level so that drill path can be
within designed.
- D200 galv. steel pipe shall be welded and inserted into drilled hole easily.
Potential
problem
1. For safety:
- Unsafe activities (mobilization/demobilization, walking, moving
tools,…) when work across expressway.
- Harming adjacent constructions.
- Unsafe when work in raining time.
2. For work organization:
- Difficulty when work in narrow drilling working space, especially in
high level road shoulder.
- Taking time when work or moving between construction sites due to
expressway traffic regulations, especially in case of emergency.
- Ground problem: Hard ground condition with rock, stone, gravel,…
can create many problem when drilling.
3. For management:
Poor management activities, including supervision and documentation
due to far distances between construction sites.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 9
Solution
1. For safety:
- Risk assessment and safety training for all construction personnel.
- Set up and maintain good cooperation with expressway management
authority:
+ Prepare and explain working procedure in details.
+ Understand cooperation procedure for emergency cases in
expressway.
+ Keep contacted with expressway authority at all working time.
- Set up protection when work in raining time or stop work.
2. For work organization:
- Prepare wide and strong enough working base by earth/foundation
work, sand bags,… a steel frame shall be set up at road shoulder for
drilling equipments laying and work.
- Set up a mobile work group, including vehicle, equipment, personnel
ready for mobilization or demobilization at all time.
- Carefully checking material, consumables, equipment condition
before mobilization, including spare for problem.
- Prepare at-site equipment maintenance plan for emergency cases.
- Overtime working, if required.
- Discuss with the Employer/Contractor to find out possible method,
including changing location, drill depth,… to overcome ground
condition problem.
3. For management:
- Set up mobile offices with staff available at site during construction.
- Carefully study working condition and prepare preventive action to
eliminate risk, problem.
Table 3 – Potential problem and solution
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 10
II.2. PREPARATION
II.2.1. Equipment, tools, material and consumables
In order to get the job done in time, the following shall be prepared and mobilized to
the sites:
No. Description Capacity Unit Q’ty
I Equipment, tools
1 Drilling machine D24x26 115hp Set 01
2 Drilling fluid mixing tank 5000 lit Set 02
3 Digitrak F5 locator 25,9m Set 01
4 BH190 pneumatic pipe-ramming
hammer 1500KN Set 01
5 Air compressor 0.7MPa,
6m3/min Set 01
6 Guide rail U200 steel Set 01
7 Leveling instrument 0.8m long Set 01
8 Chain block 3 ton Set 02
9 Tensioner 1 ton Set 02
10 Laser pointer 15w Set 01
11 Walkie-talkie 5w Set 02
12 Excavator
0,4m3 Ea. 01
13 Diesel pump 30m3/h Ea. 01
14 Generator 30KVA Ea. 01
15 Welding machine 250A Ea. 02
16 Grinding machine 15kW Ea. 02
17 Cargo crane 10 tonne Ea. 01
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 11
18 Diesel winch 1 tonne Ea. 01
19 Steel U200, I700 Ton 4
20 Wooden pile D150x3000 Ea. 150
21 Mobile accommodation camp 2mx3m Ea. 02
II Material and consumables
1 D200 galvanized steel pipe Sch40 M 1000
2 Bentonite USA Ton 10
3 Additives USA Ton 01
4 Welding consumables Japan Ton 0,5
5 Diesel oil Litter 2000
6 Hydraulic oil Shell Litter 600
7 Fuel Litter 400
Table 4 – List of equipment, tools, material and consumables
II.2.2. Site organization
II.2.2.1. Organization chart
SITE MANAGER
DRILLING
TEAM 1&2
CONSTRUCTION
SUPERVISOR 1&2
EQUIPMENT
TEAM 1&2
GENERAL LABOUR
TEAM 1&2 SURVEY
TEAM
LOGISTIC/
ADMIN 1&2 SAFETY
SUPERVISOR 1&2
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 12
II.2.2.2. Personnel’s job description
1. Site manager
- Prepare working procedures for safety, drilling,… and submit the
Employer/Contractor for approval.
- Take part in meeting for work permit held by the Employer.
- Set up and maintain information network from customer, employer to drilling
team at all working time to make sure that customer’s requirements shall be
done in the their owned manner.
- Contact with local government, residence related with construction sites to get
the support for construction work.
- Risk assessment for all work and carry out safety training, meetings for
construction personnel.
- Make sure that all personnel, vehicle, equipment, tool, material, consumables
mobilized for work are checked for safety.
- Prepare preventive actions before work execution.
- Organize overcome actions in case of problem, emergency.
- Make sure that all construction personnel understand their owned assignment,
contact network before any work.
- Assign and control safety supervisor’s work, make sure that all work activities
shall be done under safety supervision.
- Assign and control logistic/admin’s work, including: document control,
material supply control, person administration control.
- Assign and control construction supervisor’s work, including: quality control,
schedule control, equipment control, earth/foundation work control.
- Assign and control survey team’s work, including contact with expressway
construction contractor to get more information about road structure.
2. Safety supervisor
- Study working procedures, site survey, analyze risk for all work activities and
support for site manager complete safety procedure.
- Take part in meeting for work permit together with site manager.
- Support for site manager in safety meetings at site.
- Supervises all site activities:
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 13
Check for safety all personnel, vehicle, equipment, tool, material,
consumables mobilized to site before and during construction activities.
Advise drilling team safe way to work.
Stop unsafe work and report site manager to avoid problem.
- Prepare daily safety report, submit to site manager.
3. Logistic/admin
- Responsible for documentation at site and office.
- Keep contacted with the Employer and Contractor’s office.
- Receive list of equipment, tools, material and consumables from site manager
to do preparation.
- Support for site manager in preparation personnel’s certificates, equipment’s
certificates, material/consumables’ certificates, submit to the
Employer/Contractor for approval.
- Arrange mobilization/demobilization.
- Prepare time sheet, payment.
4. Construction supervisor
- Support for site manager to control all site activities:
Mobilization/demobilization.
Earth/foundation work.
Welding work.
Drilling work.
Pipe ramming work.
- Check all material/consumables for quality before using for work.
- Check all equipments for function before work.
- Prepare quality control documents at site, get site manager’s signature and
submit to the Employer/Contractor for approval.
- Prepare as-built document, get site manager’s signature and submit to the
Employer/Contractor for approval.
- Support for site manager in emergency case.
5. Survey team
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 14
- Carry out site survey.
- Report to site manager.
- Take part in discussion with construction team to find out suitable construction
method.
- Contact with expressway construction contractor for more details with road
structure.
6. Drilling team
- Receive work order from construction supervisor.
- Set up safety signs, safety fence as required in safety procedure before working.
- Set up protection for personnel, equipment, and material when raining.
- Understand and work as required in the safety procedure.
- Understand and follow strictly required steps in emergency case.
- Cooperate with expressway authority to keep safe for traffic, existing
constructions.
- Locate drill paths at site.
- Set up working base with support from general labor:
In flat ground: Earth work to excavate working trench.
In road shoulder: Foundation work to build up steel frame for drilling
equipment reinforcement.
- Arrange welding work to line up D200 galv. steel pipe before and during pipe
ramming work.
- Drill by using hdd machine to get the right path.
- Pipe ram to insert steel pipe into drilled hole to complete drilling work as
designed.
- Report to construction supervisor any difficulty when working, including:
ground condition, equipment condition, material/consumables condition,
traffic,… to prevent problem.
7. Equipment team
- Receive work order from construction supervisor.
- Daily check construction equipment for function.
- Prepare spare parts for maintenance or repair work.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 15
- Cooperate with drilling team to mobilize / demobilize equipment, tools in the
safe way.
- Cooperate with drilling team to keep safe for equipment during work.
- Report to construction supervisor.
8. General labor
- Receive work order from drilling team.
- Understand and work as required in the safety procedure.
- Understand and follow strictly required steps in emergency case.
- Support for drilling team complete earth/foundation work.
- Support for drilling team to set up safety signs, safety fence, and protection.
- Support for welding work.
- Move tools, material to the right place as required by drilling team.
II.3. HORIZONTAL DIRECTIONAL DRILLING (HDD)
II.3.1. Pilot drilling
Pilot drilling is done by following the directional head from surface with the help of
the transmitter installed inside drill head. Signal from transmitter will be gained by a
receiver, which kept above by a technician and converted into drilling data in the
display. So the depth, direction and slope is known, in order to avoid existing
infrastructure.
Pilot drilling head can be changed according to the ground formation. Drilling is done
by rotation, directional drilling is done by head.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 16
A remote display set up in drilling machine will show drilling data to help operator
knows about drill path.
The F Series™ Display (FSD™) lets you see drilling
information at the drill and can receive telemetry
signals from the F5®, F2
®, SE™, Eclipse
®, Mark III,
and Mark V locating systems. The FSD™ remote
display is equipped with externally mounted antenna.
Additional antenna options available upon request for
increased telemetry range.
II.3.2. Drill path and drilled hole size
Drill path must be controlled to keep followed designed, which is straight and parallel
with road surface at a depth of -2m min.
Drill head size is chosen with a considered drilling speed so that a D200 hole will be
created for next step. Drilled hole should be prepare for pipe ramming due to D200
steel pipe is quite small for keeping direction when ramming.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 17
II.3.3. Drilling fluid
II.3.3.1. Drilling fluid function
Drilling fluid plays an important role in the success of drilling. Drilling fluid is a
mixture of water, bentonite, polymer and additives. Quantities of those elements will
be calculated basing on ground structure, pipe diameter, drill length.
A good drilling fluid will help to get the following:
- Transfer maximum cutting soil out of drilled hole.
- Create stable hole wall, avoid sand, gravel, stone,… collapse.
- Lubricate drilling tools or product pipe when moving.
II.3.3.2. Mixing procedure
Procedure for mixing is essential in the success of drilling. Well mixing will create a
good quality drilling fluid.
The following instruction from manufacturer must be followed:
- Quantity and adequate time for mixing bentonite.
- Quantity and adequate time for mixing polymer.
- Quantities of poured additives and mixing time.
- Mixing pumping speed, pressure.
For crossing No. 20 to No. 37, more additives shall be applied to overcome hard soil
condition with sticky clay and stone in various sizes.
II.3.3.3. Original
All bentonite, polymer, additives mobilized for drilling work will be U.S.A. original.
II.4. PIPE RAMMING
II.4.1. Setting up
Setting up the foundation and a frame for pipe ramming hammer is very important.
The right direction for hammer running will help to get D200 steel pipe reached at
destination without adjustment. The hammer will secured with D200 steel pipe and on
a guide rail, which runs together with hammer when working.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 18
A trench will be dug in the equipment side for guide rail setting up.
In case of setting up in a road shoulder, a foundation with sand bag, steel frame will
be done so that rammer’s frame can run in a stable direction.
Another trench will be dug in the destination side to get D200 steel pipe end.
II.4.2. Pipe ramming technique
Refer links:
https://www.youtube.com/embed/WR-
CvMo2Rqg?rel=0&wmode=transparent
https://www.youtube.com/watch?v=hdc63KY9dyw
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 19
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 20
Flow diagram of ramming process
After pilot drilling D200 steel pipe will be inserted by pipe ramming technique.
Ramming accuracy is dependent on drilled hole. In case of only pipe ramming can
applied (where narrow space for drilling equipment setting up), drill path will be
reached by using laser pointer with a careful action.
When ramming, pushing force will be adjusted by control valves in the air compressor
so that the D200 pipe goes smoothly and soil out from pipe inside smoothly also. In
case of hitting to a hard object (stone, rock, hard soil structure), water jet will applied
to get the object loosen up for easier pipe running.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 21
After complete pushing a pipe, a new pipe will be lined up and welded. When the
weld cooled down enough, rammer will lined up, secured and operated to continue
pushing.
A good ramming will be done with following a procedure, which carefully considered
basing on knowing ground structure. Drilling fluid kept inside drilled hole before
ramming will help to maintain D200 steel pipe direction and avoid wall collapse,
especially ramming through sand.
BH190 pneumatic pipe-ramming hammer
Pipe ramming hammer is a low frequency pneumatic impacting tool with large impact
power. It take compressed air as power source to drive cylinder punch hammer to beat
on hammering block, then the steel pipe directly rammer inside the stratum along the
rail track. When working, pipe ramming hammer produce larger impact force; this
force directly acts on the pipe end and passing through the pipe delivered to the front
pipe boots, cutting soil, the cut soil enter into the steel pipe, once pipes reach the
target pit, excluding the soil core, pipeline laying is completed.
Pipe ramming hammer is mainly used for steel pipe trenchless laying, also it can be
used for pipe shed construction, gold mining exploration, cast-in-place pile, steel pipe
pile and profiled steel sheet pile engineering and so on.
BH190 pneumatic pipe-rammer have very good application to the ground, easy
operating, suitable for small size pipe.
II.4.3. Main parts and functions of pipe ramming hammer system
II.4.3.1. Main parts
Pneumatic pipe-rammer is insist of pipe hammer, high pressure hose, oil injecting
system, lubricating system and other parts, the follow picture is the main structure.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 22
1. Soil layer
2. Cutting heads
3. Steel pipe
4. Padding wood
5. Soil extractor
6. Soil extraction window
7. Pipe hammer
8. Pulley
9. Hooks
10. High pressure windpipe
11. Hammer-in valve
12. Oil injector
13. Oil level display window
14. Main air intake valve
15. Air compressor exhaust valve
16. Air compressor
17. Jet grouting steel pipe
18. Hammer pipe head
19. Pull ring
20. Jet grouting hose
21. Adjusting cone ringer
22. Tensioner
23. Jet grouting valve
24. Grout storage can
25. Pressure gauge
26. Intake air hose
27. Oil dose adjusting valve
28. Air intake valve of the jet grouting
pipe
29. High pressure hose.
II.4.3.2. Main functions
- The cutting head: also called pipe boots, welded in the front of steel pipes to
protect the pipe mouth, reducing the cutting area, compacting pipe outer soil
layer, reducing the soil layer friction on the steel pipe outer wall;
- Wood pad: adjusting steel pipe and pipe ramming hammer height to keep them
in the same axis;
- The soil excavating tool: transfer pipe ramming hammer impact force, discharge
out extrusive soil at the other end of the pipe which entering inside the steel pipe
during pipe ramming process.
- Pipe ramming hammer: providing pipe laying impact force;
- Inlet valve: used to start or shut off the rammer;
- Oiler: the compressed air brings the lubricating oil into the pipe ramming
hammer, to lubricate the moving parts in the pipe ramming hammers, injection
volume can be adjusted, and through oil window you can watch the inside oil
mass;
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 23
- Air compressor: providing compressed air to the rammer and sweep away soil
core of steel pipe;
- Pipe ramming head: preventing steel pipe month expanding or damage after
hammering;
- Adjusting taper sleeve: let the pipe ramming head, soil excavating tool and pipe
ramming hammers matching with steel pipe diameter;
- The grouting pipe: convey the mud or lubricating liquid to front end of the pipe,
rear channel of the pipe boot;
- Grouting system: consist of slurry storage tank, grouting pipe, air tube, control
valve, it can mud jack to the internal and external wall of steel pipe to reduce the
frictional resistance; in most cases the using effect of grouting system is not too
good because of grouting pipe breakage and lose efficacy, so it is not often used.
II.4.3.3. Soil cleaning
When the pipe going into the ground by impacting force, soil core enter in the steel
pipe, a soil cleaner powered by compressed air will be used for pushing out the soil
core inside pipes until ramming work is completed.
In hard ground conditions need high pressure water shall be used for soil cleaning.
1. Soil layer
2. Soil core
3. Steel pipe
4. Soil cleaning ball
5. Seal cover plate
6. Seal ring
7. Stop level
8. Air intake pipe
9- Air intake valve
10. Oil injector
11. Air compressor
Soil cleaner includes soil cleaning ball and seal cover plate. Outer wall of the soil
cleaning ball cling to the steel pipe wall, and thus it will form a piston in the steel
pipe, the effect of compressed air is making it go forward inside the steel pipe, then
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 24
the soil core inside the steel pipes will be pushed out from the steel pipe. The seal
cover plate is used for plugging the nozzle at the steel pipe end.
II.4.3.4. Pneumatic pipe rammer structure
1. Hammering block
2. Impact hammer
3. Cylinder
4. Air distributing hole
5. Air distributing rod
6. Damper
7. Hose
II.4.3.5. Pipe rammer selection
Correct selection of pipe ramming hammer is very important. Selection of pipe
ramming hammers basing on overall considering the traversing stratum, pipe laying
length and pipe diameter. Strata density, hardness, adhesion, water resistance, gravel
content,… has great influence on the rammer pipe laying ability.
It is relatively easily to laying pipes in soft, small viscous, rich water, less sand and
gravel content (less than 20%) stratum;
In the dense, hard, big viscosity, less water, large sand and gravel content (more than
60%) stratum laying pipe is relatively difficult.
In the actual engineering, you can choose the pipe ramming hammer with the standard
average pipe laying speed 2~5m/h.
Following chart gives a guidance for choosing hammer with standard ground
condition.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 25
Hammer selection chart
II.4.3.6. Requirement for steel product pipe
II.4.3.6.1. Pipe outside cleaning
Steel pipe shall be clean and anti-corrosive, thus anti-corrosion work must be done
before construction. The best method is covering the pipe with glass fiber, other
methods can be applied are: asphalt covering, epoxy covering, painting.
II.4.3.6.2. Wall thickness
Strong enough pipe wall helps to keep stable for pipeline during ramming so that pipe
can reach at desired destination. When wall thickness is less than the required,
additional reinforcement must be applied to pipe end and seam welding joint, in order
to prevent the steel pipe end part and the seaming place to be cracked.
pipe diameter wall thickness pipe diameter wall thickness
≤Φ100mm 4mm Φ500—Φ800mm 9mm
Φ100—Φ180mm 5mm Φ800—Φ1000mm 10mm
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 26
Φ180—Φ250mm 6mm Φ1000—Φ1200mm 12mm
Φ250—Φ350mm 7mm Φ1200—Φ1500mm 15mm
Φ350—Φ500mm 8mm Φ1500—Φ2000mm 19mm
Requirement for wall thickness
II.5. EARTH/FOUNDATION WORK FOR DRILLING EQUIPMENT
II.5.1. Earth work in flat ground
Earth work to make working trench for guide rail, hammer setting up in flat ground.
After digging trench, protection work will be done, such as: cover arrangement, water
pump arrangement,
II.5.2. Earth/foundation work in road shoulder
In case of arranging drilling equipment in road shoulder, earth work and foundation
work shall be done to get a stable working base.
Earth work includes following steps:
- Clean up ground from water, rubbish, trees,…
- Level up by sand bags, soil to desired level so that can get drill path -2m from
road surface.
Foundation work includes following steps:
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 27
- Pile up by wooden piles so that a secured frame can be made to protect sand
bags, soil from collapse, especially in raining time.
- Steel work to make a strong frame for drilling machine’s working base. Frame
shall be made by welding or joining up by bolts and nuts depending on safety
requirements.
- Secure drilling machine into steel frame.
- Secure rammer’s frame into steel frame after drilling work.
Drilling equipment reinforcement help to keep machine stable so that desired drill
path can be done in 1 time pilot drilling without interruption for adjustment.
Good reinforcement also help to protect machine from slipping or falling down from
working base.
Earth/foundation work shall be done before mobilization, avoiding wasting time for
waiting.
II.6. OVERCOMING ACTIONS WHEN DRILLING/RAMMING PROBLEM
When drill head hit a hard object, the following steps must be done:
- Check back ground structure reports to estimate object with type, size.
- Try to go through the object place, if can.
- Calculate a substituted action.
- Take back drill head and change direction without moving drilling machine.
- Move drilling machine to more suitable place and start a new drilling.
- Report to Employer/Contractor.
When rammed pipe hit a hard object, the following steps must be done:
- Check back ground structure reports or drilling report to estimate object with
type, size.
- Try to go through the object place, if can.
- Take back pipe and try another ramming.
- Move pipe and hammer more suitable place and start a new drilling.
- Report to Employer/Contractor.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 28
CHAPTER III
WORK PLAN
III.1. SUGGESTED ACTIVITIES
1. Crossing No.1 Km0+100, Pk4-ITS008-G-111-D: 44m
Site condition Suggested activities
1. Site entrance: in ramp way.
- Mobilization done at night time to avoid
traffic problem.
- Safety signs, fence, barricade will be set
up.
2. Mobilization space: wide enough
but in grass area. - Keep tidy for grass area.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling.
4. Ground level: lower than around,
will be filled with water in raining
time
- Foundation work done to keep equipment
laying on higher level to keep away water
when raining.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 29
2. Crossing No.2 Km0+140, Pk4-ITS008-G-111-D: 45m
Site condition Suggested activities
1. Site entrance: in ramp way.
- Mobilization done at night time to avoid
traffic problem.
- Safety signs, fence, barricade will be set
up.
2. Mobilization space: wide enough
but in grass area. - Keep tidy for grass area.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling.
4. Ground level: lower than around,
will be filled with water in raining
time
- Foundation work done to keep equipment
laying on higher level to keep away water
when raining.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 30
3. Crossing No.3 Km0+720, Pk4-ITS008-G-112-D: 18m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done at night time to avoid
traffic problem.
- Safety signs, fence, barricade will be set
up.
2. Mobilization space: narrow. - Earth work done to extend work space.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 31
4. Crossing No.4 Km4+000, Pk4-ITS008-G-117-D: 33m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done at night time to avoid
traffic problem.
- Safety signs, fence, barricade will be set
up.
2. Mobilization space: narrow. - Earth work done to extend work space.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling and pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 32
5. Crossing No.5 Km6+150, Pk4-ITS008-G-121-D: 19m
Site condition Suggested activities
1. Site entrance: in residential way. - Safety signs, fence, barricade will be set
up.
2. Mobilization space: narrow. - Earth work done to extend work space.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 33
6. Crossing No.6 Km10+920, Pk4-ITS008-G-128-D: 22m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Foundation work done to extend work
space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling and pipe ramming.
4. Ground level: far lower than road
surface.
- Set up strong steel frame at road shoulder
at level of -2m from road surface for
drilling activities
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 34
7. Crossing No.7 Km11+400, Pk4-ITS008-G-129-D: 30m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Foundation work done to extend work
space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling and pipe ramming.
4. Ground level: far lower than road
surface.
- Set up strong steel frame at road shoulder
at level of -2m from road surface for
drilling activities
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 35
8. Crossing No.8 Km14+500, Pk4-ITS008-G-211-D: 22m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Foundation work done to extend work
space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling and pipe ramming.
4. Ground level: far lower than road
surface.
- Set up strong steel frame at road shoulder
at level of -2m from road surface for
drilling activities
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 36
9. Crossing No.9 Km22+380, Pk4-ITS008-G-222-D: 19m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Foundation work done to extend work
space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling and pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 37
10. Crossing No.10 Km22+720, Pk4-ITS008-G-223-D: 16m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Foundation work done to extend work
space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling and pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 38
11. Crossing No.11 Km22+800, Pk4-ITS008-G-223-D: 20m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Foundation work done to extend work
space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling and pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 39
12. Crossing No.12 Km23+230, Pk4-ITS008-G-224-D: 47m
Site condition Suggested activities
1. Site entrance: in ramp way.
- Mobilization done at night time to avoid
traffic problem.
- Safety signs, fence, barricade will be set
up.
2. Mobilization space: wide enough
but in grass area. - Keep tidy for grass area.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling.
4. Ground level: lower than around,
will be filled with water in raining
time
- Foundation work done to keep equipment
laying on higher level to keep away water
when raining.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 40
13. Crossing No.13 Km23+270, Pk4-ITS008-G-224-D: 40m
Site condition Suggested activities
1. Site entrance: in ramp way.
- Mobilization done at night time to avoid
traffic problem.
- Safety signs, fence, barricade will be set
up.
2. Mobilization space: wide enough
but in road area. - Keep tidy for road area.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling.
4. Ground level: lower than around,
will be filled with water in raining
time
- Foundation work done to keep equipment
laying on higher level to keep away water
when raining.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 41
14. Crossing No.14 Km23+330, Pk4-ITS008-G-224-D (1): 60m
Site condition Suggested activities
1. Site entrance: in ramp way.
- Mobilization done at night time to avoid
traffic problem.
- Safety signs, fence, barricade will be set
up.
2. Mobilization space: wide enough
but in road area. - Keep tidy for road area.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling.
4. Ground level: lower than around,
will be filled with water in raining
time
- Foundation work done to keep equipment
laying on higher level to keep away water
when raining.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 42
15. Crossing No.15 Km23+330, Pk4-ITS008-G-224-D (2): 46m
Site condition Suggested activities
1. Site entrance: in ramp way.
- Mobilization done at night time to avoid
traffic problem.
- Safety signs, fence, barricade will be set
up.
2. Mobilization space: wide enough
but in road area. - Keep tidy for road area.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling.
4. Ground level: lower than around,
will be filled with water in raining
time
- Foundation work done to keep equipment
laying on higher level to keep away water
when raining.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 43
16. Crossing No.16 Km23+445, Pk4-ITS008-G-224-D: 24m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Foundation work done to extend work
space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling and pipe ramming.
4. Ground level: far lower than road
surface.
- Set up strong steel frame at road shoulder
at level of -2m from road surface for
drilling activities
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 44
17. Crossing No.17 Km23+790, Pk4-ITS008-G-224-D: 16m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Foundation work done to extend work
space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling and pipe ramming.
4. Ground level: far lower than road
surface.
- Set up strong steel frame at road shoulder
at level of -2m from road surface for
drilling activities
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 45
18. Crossing No.18 Km24+110, Pk4-ITS008-G-311-D: 16m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Earth work done to extend work space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling and pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 46
19. Crossing No.19 Km24+950, Pk4-ITS008-G-312-D: 21m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Earth work done to extend work space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling and pipe ramming.
4. Ground level: not high, will be
filled with water in raining time.
- Pump trench water out at all time.
- Cover work space when raining.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 47
20. Crossing No.20 Km34+500, Pk4-ITS008-G-326-D: 24m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Earth work done to extend work space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: Hard soil with
stone in various sizes Technique: pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
5. Adjacent constructions: Concrete
drainage trench crossing working
area at 3m away from express way
fence, closed to sloping ground
Working trench will be dug crossing and
under existing trench to 4m, enough for
ramming.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 48
21. Crossing No.21 Km34+615, Pk4-ITS008-G-326-D: 28m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Earth work done to extend work space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: Hard soil with
stone in various sizes Technique: pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
5. Adjacent constructions: Concrete
drainage trench crossing working
area at 3m away from express way
fence, closed to sloping ground
- Working trench will be dug crossing and
under existing trench to 4m, enough for
ramming.
- Excavator shall be used when hand
digging is impossible.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 49
22. Crossing No.22 Km37+200, Pk4-ITS008-G-330-D: 30m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Earth work done to extend work space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: Hard soil with
stone in various sizes Technique: pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
5. Adjacent constructions: Concrete
drainage trench crossing working
area at 3m away from express way
fence, closed to sloping ground
- Working trench will be dug crossing and
under existing trench to 4m, enough for
ramming.
- Excavator shall be used when hand
digging is impossible.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 50
23. Crossing No.23 Km40+940, Pk4-ITS008-G-416-D (1): 27m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Earth work done to extend work space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: Hard soil with
stone in various sizes Technique: pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
5. Adjacent constructions: Concrete
drainage trench crossing working
area at 3m away from express way
fence, closed to sloping ground
- Working trench will be dug crossing and
under existing trench to 4m, enough for
ramming.
- Excavator shall be used when hand
digging is impossible.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 51
24. Crossing No.24 Km40+940, Pk4-ITS008-G-416-D (1): 29m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Earth work done to extend work space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: Hard soil with
stone in various sizes Technique: pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
5. Adjacent constructions: Concrete
drainage trench crossing working
area at 3m away from express way
fence, closed to sloping ground
- Working trench will be dug crossing and
under existing trench to 4m, enough for
ramming.
- Excavator shall be used when hand
digging is impossible.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 52
25. Crossing No.25 Km41+360, Pk4-ITS008-G-417-D: 30m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Earth work done to extend work space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: Hard soil with
stone in various sizes Technique: pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
5. Adjacent constructions: Concrete
drainage trench crossing working
area at 3m away from express way
fence, closed to sloping ground
- Working trench will be dug crossing and
under existing trench to 4m, enough for
ramming.
- Excavator shall be used when hand
digging is impossible.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 53
26. Crossing No.26 Km43+650, Pk4-ITS008-G-421-D: 20m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Foundation work done to extend work
space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: fill-in soil with
sand, fine gravel. Technique: drilling and pipe ramming.
4. Ground level: far lower than road
surface.
- Set up strong steel frame at road shoulder
at level of -2m from road surface for
drilling activities
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 54
27. Crossing No.27 Km43+870, Pk4-ITS008-G-421-D: 20m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Foundation work done to extend work
space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: Hard soil with
stone in various sizes. Technique: drilling and pipe ramming.
4. Ground level: far lower than road
surface.
- Set up strong steel frame at road shoulder
at level of -2m from road surface for
drilling activities
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 55
28. Crossing No.28 Km45+250, Pk4-ITS008-G-423-D: 21m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Earth work done to extend work space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: Hard soil with
stone in various sizes Technique: pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
5. Adjacent constructions: Concrete
drainage trench crossing working
area at 3m away from express way
fence, closed to sloping ground
- Working trench will be dug crossing and
under existing trench to 4m, enough for
ramming.
- Excavator shall be used when hand
digging is impossible.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 56
29. Crossing No.29 Km49+000, Pk4-ITS008-G-429-D: 16m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Earth work done to extend work space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: Hard soil with
stone in various sizes Technique: pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
5. Adjacent constructions: Concrete
drainage trench crossing working
area at 3m away from express way
fence, closed to sloping ground
- Working trench will be dug crossing and
under existing trench to 4m, enough for
ramming.
- Excavator shall be used when hand
digging is impossible.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 57
30. Crossing No.30 Km49+250, Pk4-ITS008-G-429-D (1): 19m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Foundation work done to extend work
space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: Hard soil with
stone in various sizes. Technique: drilling and pipe ramming.
4. Ground level: far lower than road
surface.
- Set up strong steel frame at road shoulder
at level of -2m from road surface for
drilling activities
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 58
31. Crossing No.31 Km49+250, Pk4-ITS008-G-429-D (2): 16m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Foundation work done to extend work
space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: Hard soil with
stone in various sizes. Technique: drilling and pipe ramming.
4. Ground level: far lower than road
surface.
- Set up strong steel frame at road shoulder
at level of -2m from road surface for
drilling activities
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 59
32. Crossing No.32 Km52+170, Pk4-ITS008-G-434-D: 18m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Foundation work done to extend work
space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: Hard soil with
stone in various sizes. Technique: drilling and pipe ramming.
4. Ground level: far lower than road
surface.
- Set up strong steel frame at road shoulder
at level of -2m from road surface for
drilling activities
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 60
33. Crossing No.33 Km52+430, Pk4-ITS008-G-434-D (1): 18m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Foundation work done to extend work
space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: Hard soil with
stone in various sizes. Technique: drilling and pipe ramming.
4. Ground level: far lower than road
surface.
- Set up strong steel frame at road shoulder
at level of -2m from road surface for
drilling activities
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 61
34. Crossing No.34 Km52+430, Pk4-ITS008-G-434-D (2): 18m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Foundation work done to extend work
space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: Hard soil with
stone in various sizes. Technique: drilling and pipe ramming.
4. Ground level: far lower than road
surface.
- Set up strong steel frame at road shoulder
at level of -2m from road surface for
drilling activities
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 62
35. Crossing No.35 Km54+500, Pk4-ITS008-G-438-D: 32m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Earth work done to extend work space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: Hard soil with
stone in various sizes Technique: drilling and pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
5. Adjacent constructions: Concrete
drainage trench crossing working
area at 3m away from express way
fence.
- Working trench will be dug crossing and
under existing trench to 4m, enough for
ramming.
- Excavator shall be used when hand
digging is impossible.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 63
36. Crossing No.36 Km54+920, Pk4-ITS008-G-440-D: 19m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Earth work done to extend work space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: Hard soil with
stone in various sizes Technique: drilling and pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
5. Adjacent constructions: Concrete
drainage trench crossing working
area at 3m away from express way
fence.
- Working trench will be dug crossing and
under existing trench to 4m, enough for
ramming.
- Excavator shall be used when hand
digging is impossible.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 64
37. Crossing No.37 Km54+980, Pk4-ITS008-G-441-D: 43m
Site condition Suggested activities
1. Site entrance: in expressway.
- Mobilization done in off-peak time to
avoid traffic problem.
- Safety signs, fence, barricade shall be set
up.
2. Mobilization space: narrow.
- Earth work done to extend work space.
- D200 pipe must be cut short when doing
pipe ramming.
3. Ground structure: Hard soil with
stone in various sizes Technique: drilling and pipe ramming.
4. Ground level: not high, will be
filled with water in raining time
- Pump trench water out at all time.
- Cover work space when raining.
5. Adjacent constructions: Concrete
drainage trench crossing working
area at 3m away from express way
fence.
- Working trench will be dug crossing and
under existing trench to 4m, enough for
ramming.
- Excavator shall be used when hand
digging is impossible.
METHOD STATEMENT – D200 STEEL PIPE EXPRESSWAY CROSSING
BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 65
III.2. WORK PLAN
Project work plan consists of plans for 37 crossings, which calculated from work steps
in each crossing and general preparation, final check, hand over time.
Work steps generally described in table 5 – Plan for a crossing with estimated
construction time basing on:
- Site condition, including: entrance, mobilization space, ground structure,
ground level, adjacent constructions,…
- Expressway regulations.
See table 6 – Project general plan for the whole project estimated time table, which
prepared for 2 teams working concurrently and closely to each other.
METHOD STATEMENT – D200 EXPRESSWAY CROSSING BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 66
Table 5 – Plan for a crossing
No. Responsibility
Activities
Drawing
/Document Manpower
Equipment
/Tools to be
used
Time
(estimated) Safety Report
I PREPARATION
Action: Deltatech
* Work
permit
* Approved
drawings
* Approved
procedures
/regulations
from
Employer
/Contractor
Site Manager
Safety
supervisor
Logistic/Ad.
Construction
supervisor
Drilling team
Equip. team
General Labor
7-seat car
15 ton cargo
crane
2-3 days
* Set up safety signs,
fence, barricade,
personnel equipped
with PPE.
* Safety meeting
before work.
* Keep safe distance
from dangerous
objects.
* Work under safety
supervision
*Daily
work.
report.
*Safety
reports.
Supervision:
Employer/Contractor
II DRILLING/RAMMING WORK
Action: Deltatech
* Work
permit
* Approved
drawings
* Approved
procedures
/regulations
from
Employer
/Contractor
Site Manager
Safety
supervisor
Logistic/Ad.
Construction
supervisor
Drilling team
Equip. team
General Labor
D24x26 drilling
machine
Digitrak F5
locator
Bentonite
mixing tank
BH190
ramming
hammer
Welding
machine
2 days for
drilling / 2
days for
ramming
* Set up safety signs,
fence, barricade,
personnel equipped
with PPE.
* Safety meeting
before work.
* Keep safe distance
from dangerous
objects.
* Work under safety
supervision.
*Daily
report.
*Safety
reports.
*Drilling
/ramming
reports.
Supervision:
Employer/Contractor
1. Set up mobile accommodation
camp.
2. Locate drill path at site.
3. Earth/foundation work.
4. Mobilize equipment, tools,
material, consumables
5. Pilot drilling.
6. D200 pipe ramming.
7. Welding work to join up pipes
until complete ramming.
8. Cleaning up pipe inside.
METHOD STATEMENT – D200 EXPRESSWAY CROSSING BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 67
III FINAL CHECK, HAND OVER, DEMOBILIZATION
Action: Deltatech
* Work
permit
* Approved
drawings
* Approved
procedures
/regulations
from
Employer
/Contractor
Site Manager
Safety
supervisor
Logistic/Ad.
Construction
supervisor
Drilling team
Equip. team
General Labor
7-seat car
15 ton cargo
crane
1 day
* Set up safety signs,
fence, barricade,
personnel equipped
with PPE.
* Safety meeting
before work.
* Keep safe distance
from dangerous
objects.
* Work under safety
supervision.
*Daily
report.
*Drilling
/ramming
reports.
*As-built
documen
ts.
*Hand-
over
documen
ts.
Supervision:
Employer/Contractor
`
9. Final check, including: data
check, take measure.
10. Hand over.
11.Take a part structures for
demobilization.
12. Reinstatement.
13. Demobilization.
METHOD STATEMENT – D200 EXPRESSWAY CROSSING BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 68
Table 6 – Project general plan
Item Steps of work Time (week)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
I General preparation
II Construction
1 Crossing No.1
2 Crossing No.2
3 Crossing No.3
4 Crossing No.4
5 Crossing No.5
6 Crossing No.6
7 Crossing No.7
8 Crossing No.8
9 Crossing No.9
10 Crossing No.10
11 Crossing No.11
12 Crossing No.12
13 Crossing No.13
14 Crossing No.14
15 Crossing No.15
16 Crossing No.16
17 Crossing No.17
18 Crossing No.18
19 Crossing No.19
20 Crossing No.20
21 Crossing No.21
METHOD STATEMENT – D200 EXPRESSWAY CROSSING BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 69
22 Crossing No.22
23 Crossing No.23
24 Crossing No.24
25 Crossing No.25
26 Crossing No.26
27 Crossing No.27
28 Crossing No.28
29 Crossing No.29
30 Crossing No.30
31 Crossing No.31
32 Crossing No.32
33 Crossing No.33
34 Crossing No.34
35 Crossing No.35
36 Crossing No.36
37 Crossing No.37
III FINAL CHECK, HAND
OVER, DEMOBILIZATION
METHOD STATEMENT – D200 EXPRESSWAY CROSSING BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 70
CHAPTER IV
SAFETY CONTROL
All the factors in construction activities must be checked for safety carefully before and
during work. Checking is to find out inadequate matters, potential risks for preventive
actions or repair.
Checking procedure shall be done in various ways:
- Daily checking: For any working activity.
- Before work checking: For new construction site.
- Unexpectedly checking: In case of high risk.
IV.1. Personnel check
IV.1.1. Personality check
- Check personal training certificates.
- Check for safety training certificates.
- Check for heath certificates.
IV.1.2. Protection check
- Check PPE before and during start work.
- Check for understanding safety requirements.
- Check for working regulation obeying during work.
IV.2. Working base check
IV.2.1. Working trench check
- Check for tidiness. Trench must be free of water, mud.
- Check for protection arrangement, especially in raining time.
- Check for working space.
- Check for mobilization way.
- Check for way out in emergency case.
IV.2.2. Foundation check
- Check for tidiness. Foundation must be free of water, mud.
- Check for secure system. All parts in foundation must be secured each
other strong enough.
- Check for protection arrangement, especially in raining time.
METHOD STATEMENT – D200 EXPRESSWAY CROSSING BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 71
- Check for working space.
- Check for mobilization way.
- Check for way out in emergency case.
IV.3. Equipment/tools check
IV.3.1. Function check
Start up machine and check for working condition.
- Try all functions, one by one.
- Listen for strange noise.
- Check gauges for accuracy.
- Check electric system for function by using electric meter.
IV.3.2. Protection check
- Check for grounding system.
- Check for pressurized oil leaking.
- Check for pressurized air leaking.
- Check for electric leaking.
- Check for potential crack, disconnect, wrong function.
IV.4. Material/consumables check
IV.4.1. Protection check
- Check for failures can cause crack, break in material during work.
IV.5. RISK ASSESSMENT
Before work, a risk assessment shall be conducted and explained in details in safety
training, toolbox meeting. Site manager and safety supervisor are responsible for risk
assessment.
1. Work in and across expressway
- Activities:
o When mobilization, transportation vehicles stay near expressway safety
fence and off load equipment/tools, material.
o During work, workers move tools, material across expressway.
- Potential danger: traffic problem
o Car hit.
o Slip when moving objects in expressway.
o Traffic jam.
METHOD STATEMENT – D200 EXPRESSWAY CROSSING BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 72
2. Work with drilling machine
- Activities:
o When drilling, drill rods and its carrier moving forward/backward,
rotating by operator’s actions.
o When feeding rod, workers take a rod in by hand.
o Working with hydraulic system in drilling machine.
o When drilling machine working on foundation vibrating force makes
machine moving.
- Potential danger: operation problem
o Moving object hit to worker.
o Possibly pressurized hydraulic oil leaking causes working people
injured.
o Falling down of drilling machine, especially in wet condition after
raining.
3. Work with pipe ramming hammer
- Activities:
o When ramming, the hammer moves forward by pressurized air.
o When feeding pipe, workers take a pipe in by hand for welding.
o When continue ramming, workers take hammer in and line up with pipe
by crane and hand.
- Potential danger: operation problem
o Hammer slip away from frame.
o Falling down of hammer or guide rail, especially in wet condition after
raining.
o Air compressor line out failure causes people injured.
4. Work with electric devices (generator, welding machine, grinding machine,…)
- Activities:
o When ramming, the rammer moves forward by pressurized air.
o When feeding pipe, workers take a pipe in by hand for welding.
o When continue ramming, workers take rammer in and line up with pipe
by crane and hand.
- Potential danger: operation problem
o Rammer slip away from frame.
METHOD STATEMENT – D200 EXPRESSWAY CROSSING BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 73
o Falling down of rammer or frame, especially in wet condition after
raining.
o Air compressor line out failure causes people injured.
IV.5. SET UP AND MAINTAIN SAFETY
1. Set up safety signs, fence, barricade.
2. Equip PPE for working personnel.
3. Safety training, daily toolbox meeting done to ensure that all working personnel
understand how to work in safely way.
4. Set up protection method for adjacent constructions, especially for underground
constructions. Stop working when protection method is violated.
5. Ground survey in important places to find out potential risks.
6. Ensure that all working activities done as required in work permit.
7. Start work when all safety method set up already.
8. Site manager is highest responsible for safety in any working activities.
9. Safety supervisor stays at site at all working time, stop unsafe activity and report
to site manager for re-organizing construction work.
METHOD STATEMENT – D200 EXPRESSWAY CROSSING BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 74
CHAPTER V
QUALITY CONTROL
Construction quality will be achieved when the processes: making product pipeline, pilot
drilling, pipe ramming are controlled.
The whole quality control consists of following steps:
- Document control.
- Material/consumable control.
- Equipment/tools control.
- Drilling/ramming technique control.
- Welding test.
V.1. Document control
All construction activities shall be documented by construction supervisor so that
management personnel can check and for adequately.
Site manager will check those regularly:
- Check certificates for properly.
- Check data reports to make sure that drill path done as required, especially
the drill depth.
- Check daily report for working progress, schedule, problem,… to manage
work done as required.
V.2. Material/consumables control
Construction supervisor shall check all activities relating to material/consumables:
- Storage.
- Heat treatment for welding consumable.
- Mixing process for drilling fluid.
- Failures happened during work.
- Substitution, if any.
V.3. Equipment/tools control
Construction supervisor shall check and make sure equipment/tools can work without
unexpected problem. Stop work and report to site manager in case of wrong function.
METHOD STATEMENT – D200 EXPRESSWAY CROSSING BY HDD AND PIPE RAMMING TECHNIQUE
Prepared by: Deltatech Technical Services JSC Page 75
V.4. Drilling/ramming control
Construction supervisor shall check operators for working procedures and make sure that
drill path, ramming work will be done as required. Stop work and report to site manager
in case of inadequately.
V.5. Welding work control
Construction supervisor shall check welder for operation and make sure that the weld
will be done as required. Stop work and report to site manager in case of inadequately.
- Visual check for all weld, take measure to control weld dimensions.
- Random test when required by penetration test (PT) method.
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