LTA@Code Practice for Railway Protection, 2000

Code of Practicefor

RailwayProtection

Development & Building Control Department

AuthorityLand Transport

Code of Practice for Railway Protection

August 2000 Edition

All rights reserved. No part of this publication may be reproduced, stored ina retrieval system, or transmitted, in any form or by any means, electronic,mechanical, photocopying, recording or otherwise, without the priorpermission of the Development and Building Control Department, LandTransport Authority.

Code of Practice for Railway Protection

PREFACE

This Code of Practice for Railway Protection (herein referred to as the Code) is issued under Regulation 8of the Rapid Transit Systems (Development and Building Works in Railway Corridor and Railway ProtectionZone) Regulations.

Any development or building works to be carried out within the railway corridor and the railway protectionzone shall comply strictly with this Code.

General amendments and revision to the procedures and requirements can be expected from time to timeand any major changes will be made known to all the relevant professional bodies.

Compliance with this Code does not by itself confer immunity to the developers, building owners orqualified persons from legal liabilities.

Development & Building Control DepartmentLand Transport AuthoritySingapore

Code of Practice for Railway Protection i

PREFACE Page Page

CONTENTS i

1 General1.1 Scope 11.2 Definitions 1

2 Structure of Code2.1 Code structure 3

3 Consultation and Request forInformation

3.1 Consultation 43.2 Reference plans 43.3 Request for information 4

RAILWAY PROTECTION ZONE

4 Development Proposal withinRailway Protection Zone

4.1 General 54.2 Preliminary engineering 5 assessment4.3 Works within first reserve 54.4 Application for approval of 5

development proposal4.5 Information to be indicated on plan 5

for development works4.6 Approval of development proposal 64.7 Departure or deviation from approved 6

plan

5 Building Proposal within RailwayProtection Zone

5.1 General 75.2 Application for approval of building 7

proposal5.3 Information to be indicated on plan 7

for building works5.4 Approval of building proposal 85.5 Departure or deviation from approved 8

plan

6 Engineering Works within RailwayProtection Zone

6.1 General 96.2 Application for permit 96.3 Plan for engineering works 96.4 Engineering evaluation report 96.5 Instrumentation proposal 106.6 Method statement of work 10

6.7 Emergency procedure 116.8 Pre-condition survey report 116.9 Undertaking for supervision 116.10 Commencement of work 116.11 Departure or deviation from approved 11

plan

7 Supervision of Works withinRailway Protection Zone

7.1 General 127.2 Duties of qualified person 127.3 Monitoring of rapid transit systems 127.4 Protection of rapid transit systems 12 structure and facilities7.5 Completion of work 127.6 Release of certificate of statutory 12

completion clearance

8 Access to Track and Station Premises8.1 General 148.2 Application for access 148.3 Granting of access 14

9 Installation of Instruments inTrainway

9.1 General 159.2 Application for instrument installation 159.3 Information to be indicated on plans 15

& calculations9.4 Approval for instrument installation 169.5 Supervision of installation 16

10 Technical Requirements forDevelopment and Building Workswithin Railway Protection Zone

10.1 General 1710.2 Compliance with Code 1710.3 Meeting the performance 17

requirements10.4 Objectives and functional statements 1710.5 Deemed-to-satisfy provisions 1810.6 Alternative solutions 1810.7 Assessment methods 18

11 Performance Provisions11.1 Structural integrity of rapid transit 19

systems11.2 Operational safety of rapid transit 19

systems

Code of Practice for Railway Protection ii

Page

11.3 Fire safety and inspection/ 20maintenance of rapid transit systems

11.4 Flood protection of rapid transit 20systems

12 Acceptable Construction12.1 General requirements in all reserves 22

within railway protection zone12.2 Site preparation works 2412.3 Substructure works 2512.4 Building works in all reserves 30

RAILWAY CORRIDOR

13 Development Proposal withinRailway Corridor

13.1 General 3613.2 Application for approval of 36 development proposal13.3 Information to be indicated on plan 36

for development works13.4 Approval of development proposal 3613.5 Departure or deviation from approved 37

plan

14 Building Proposal within RailwayCorridor

14.1 General 3814.2 Application for approval of building 38

proposal14.3 Information to be indicated on plan 38

for building works14.4 Approval of building proposal 3814.5 Departure or deviation from approved 38

plan

15 Engineering Works within RailwayCorridor

15.1 General 3915.2 Application for permit 3915.3 Plan for engineering works 3915.4 Engineering evaluation report 3915.5 Commencement of work 3915.6 Departure or deviation from approved 39

plan15.7 Completion of works 40

16 Technical Requirements forDevelopment and Building Workswithin Railway Corridor

16.1 General 41

Page

16.2 Technical requirements 41

APPENDICES

A Structure of code A-1B Submission process for

development and building workswithin railway protection area

B-1

C Standard format for emergencyprocedure

C-1

D Definitions of compressible soils D-1E Guidelines for instrumentation

proposalE-1

F List of drawings F-1G Application forms G-1

Code of Practice for Railway Protection 1

GENERAL

1.1 Scope

1.1.1 This Code deals with the submissionprocedures and requirements forobtaining the approval for developmentand building proposals, the permit tocommence engineering works and theclearance for the release of certificate ofstatutory completion for works withinthe railway corridor and the railwayprotection zone. Technical requirementsfor compliance at the design andconstruction stages of development arealso stipulated.

1.1.2 The Authoritys requirements forrestricted activities are issued under aseparate document entitled Guide toCarrying out Restricted Activities withinRailway Protection and Safety Zones.

1.2 Definitions

For the purpose of this Code, thefollowing definitions shall apply :

above ground structure shall includeviaduct, bridge, abutment and any rapidtransit systems station which adjoins therailway viaduct;

alternative solution means adevelopment solution which complieswith the performance requirements otherthan by reason of complying with thedeemed-to-satisfy provisions;

amendment plan has the samemeaning as in the Rapid Transit Systems(Developments in Railway Corridor andRailway Protection Zone) Regulations;

assessment method means a methodused for determining or establishing thata development solution complies withthe performance requirements;

at grade structure shall include anyrapid transit systems station where theplatform level is at ground level, onembankment or in cutting and anysection of the railway with tracks atground level, on embankment or incutting;

Authority means the Land TransportAuthority of Singapore established underthe Land Transport Authority ofSingapore Act 1995;

building works has the same meaningas in the Building Control Act (Cap 29);

deemed-to-satisfy provisions meansthe provisions contained in Section 12 ofthis Code which are deemed to complywith the performance requirements;

development solution means a solutionwhich complies with the performancerequirements and is :a) an alternative solution; orb) a solution which complies with the

deemed-to-satisfy provisions; orc) a combination of (a) and (b)

development has the same meaning asin the Planning Act (Cap 232);

expert judgment means the judgmentof an expert (or group of experts) whohas the relevant qualifications,substantial knowledge and experience ina particular subject/ field to determinewhether a development solutioncomplies with the performancerequirements;

functional statement describes how thedevelopment proposals achieve theobjectives;land surveyor means a personregistered under the Land Surveyors Act;

objectives mean a statement containedin this Code that forms the aim of theAuthority in safeguarding the railway;

performance requirement means arequirement which states the level ofperformance which a developmentsolution must meet; and

professional engineer means a personregistered under the ProfessionalEngineers Act;

qualified person means a person asdefined in the Building Control Act (Cap29);

SECTION 1


railway area has the same meaning as inthe Rapid Transit Systems Act (Cap263A);

railway corridor has the same meaningas in the Rapid Transit Systems(Development and Building Works inRailway Corridor and Railway ProtectionZone) Regulations;

railway protection zone has the samemeaning as in the Rapid Transit Sy-stems (Railway Protection, RestrictedActivities) Regulations;

railway safety zone has the samemeaning as in the Rapid Transit Sy-stems (Railway Protection, RestrictedActivities) Regulations;

rapid transit systems has the samemeaning as in the Rapid Transit SystemsAct (Cap 263A);

restricted activities has the samemeaning as in the Rapid Transit Sy-stems (Railway Protection, RestrictedActivities) Regulations;

sub-aqueous structure shall includeany rapid transit systems structurebeneath river or sea;

the Regulations means the RapidTransit Systems (Development andBuilding Works in Railway Corridor andRailway Protection Zone) Regulations2000 as amended from time to time.

transition structure shall include anyrapid transit systems structure thatoccurs between underground structureand above ground or at grade structure;

underground structure shall includeinter-alia any rapid transit systemsunderground station, bored tunnel, cutand cover tunnel, interchange shaft,pedestrian passage, cross passagewaybetween tunnels and emergency escapeshafts;

verification method means a test,inspection, calculation or other methodthat determines whether a developmentsolution complies with the relevantperformance requirements.


SECTION 2

STRUCTURE OF CODE

2.1 Code Structure

2.1.1 This Code is divided into four main partsas shown in Appendix A. They arenamely :

(a) Introduction(b) Submission Procedures and Re-

quirements(c) Technical Requirements(d) Appendices

2.1.2 The submission procedures andrequirements for obtaining approval for adevelopment and building proposal,permit to commence engineering works,etc. within the railway protection zone andthe railway corridor are dealt with inSections 4 to 9 and 13 to 15 respectively.

2.1.3 The technical requirements for the varioustypes of engineering works within therailway protection zone and railwaycorridor are stipulated in Sections 10 to 12and 16 respectively.

2.1.4 The following items are compiled underthe appendices of this Code :

(a) Appendix A Structure of code;

(b) Appendix B Submission processfor development and building workswithin the railway protection zone;

(c) Appendix C Standard format foremergency procedure;

(d) Appendix D Definitions ofcompressible soils;

(e) Appendix E Guidelines forinstrumentation proposal;

(f) Appendix F List of drawingsindicating the definitions of reservelines for each type of rapid transitsystems structure; the detailsrequired for the checking ofinstrument installation in trainway;the details on first reserve linedemarcation; the typical debondingdetails for load bearing piles and theinterpretation of track criteria; and

(g) Appendix G Application forms.

2.1.5 Except as otherwise stated, references toa Regulation number (example,Regulation 4) in this Code are referencesto the regulations numbered in the RapidTransit Systems (Development andBuilding Works in Railway Corridor andRailway Protection Zone) Regulations2000 as amended from time to time.


SECTION 3

CONSULTATION AND REQUEST FOR INFORMATION

3.1 Consultation

3.1.1 The qualified person may consult theAuthority on proposed developmentwithin the Railway Corridor or theRailway Protection Zone for informationand requirements on railway protectionmatters before making any formalapplication for approval.

3.1.2 Any preliminary consultation with theAuthority or submission of plans shallnot be taken as approval or disapprovalof the proposed development or to beconstrued as having the agreement of theAuthority.

3.1.3 All correspondence including applicationsfor approval and requests for consultationmeeting or information should beaddressed to Manager, Development &Building Control Department, LandTransport Authority at 251 North BridgeRoad Singapore 179102.

3.2 Reference Plans

3.2.1 Plans defining the Railway Corridor andRailway Protection Zone prepared by theAuthority (LTA) are available forpurchase or for inspection during theusual working hours at the office of theDevelopment & Building ControlDepartment of Land Transport Authority.

3.2.2 The plans provided are based on dataavailable at the time of enquiry and aregiven without prejudice to any changeswhich may take place subsequently.Whilst every endeavour is made toensure that the information provided isupdated and correct, the Authoritydisclaims any liability for any damage orloss that may be caused to any persondirectly or indirectly as a result of anyerror or omission.


SECTION 4

DEVELOPMENT PROPOSAL WITHIN RAILWAY PROTECTION ZONE

4.1 General

4.1.1 This section stipulates the proceduresand requirements for obtaining approvalfor a development proposal within therailway protection zone.

4.1.2 Plan for development works within therailway protection zone shall besubmitted to the Authority for approvalin accordance with Regulation 4.

4.2 Preliminary Engineering Assessment

4.2.1 The submission process for anydevelopment works within the railwayprotection zone is as shown in the flowchart under Appendix B.

4.2.2 A professional engineer (civil) should beengaged at this stage to carry out apreliminary engineering assessment ofthe effects of the development proposalon the rapid transit systems. Theappointed professional engineer (civil) isencouraged to initiate a consultationmeeting with the Authority to discuss hisproposal before submitting a formalapplication.

4.2.3 A copy of the engineering evaluationreport, accompanied by plans forengineering works, endorsed by theappointed professional engineer (civil)shall be submitted together with theformal application for the approval ofdevelopment proposal. For developmentlocated close to the rapid transit systemsstructures, the Authority requires thequalified person to submit certified surveyplans to assist in the processing ofengineering evaluation report.

4.3 Works Within First Reserve

4.3.1 For any development works within thefirst reserve which would involve the useof crane, an application for the exemptionof the provisions under the Rapid TransitSystems (Railway Protection, RestrictedActivities) Regulations* shall be made bythe qualified person in writing.

4.4 Application for Approval ofDevelopment Proposal

4.4.1 An application for the approval ofdevelopment proposal shall beaccompanied by one set of the followingitems :

(a) Plan for development works;

(b) Engineering evaluation reportaccompanied by plan for engineeringworks; and

(c) Form LTA DBC RAIL-EXEMPT(where applicable).

4.5 Information To Be Indicated On Planfor Development Works

4.5.1 Plan for development works shall beprepared in accordance with the Regulations.

4.5.2 The first sheet of the plan shall bear thestandard declarations as given below :

4.5.3 The qualified person shall sign on everysheet of the plans and be responsible forthe accuracy of the details indicated. Theowner/ developer shall also sign on theseplans.

I, _______________________, NRICno/ Passport no, ________________,being the qualified person appointedunder Regulation 5(3) of the RapidTransit Systems (Development andBuilding Works in Railway Corridorand Railway Protection Zone)Regulations, hereby certify that thedevelopment or building works withinthe railway protection zone as shownon these plans have been designed inaccordance with the Code of Practicefor Railway Protection and any otherconditions that the Land TransportAuthority may impose.

* Application for such exemption can be made using Form LTA DBC RAIL-EXEMPT which is available in the GuideTo Carrying Out Restricted Activities within Railway Protection and Safety Zones


4.5.4 The plan shall be drawn to a scale of1:100 or 1:200 or 1:250 generally,except for the site plan which is to bepresented in a scale of 1:500.

4.5.5 Site and layout plans shall show thefollowing items :

(a) Scale of plans;

(b) Location and clearances of theproposed development works inrelation to the rapid transit systemsstructure;

(c) First, second and third reserve linesof the rapid transit systems (whereapplicable); and

(d) Basement line (if any);

4.5.6 Sections and elevations shall show thefollowing items :

(a) Scale of the plans;

(b) Platform levels of the proposeddevelopment works;

(c) Minimum clearance betweenproposed development works andthe nearest rapid transit systemsstructure; and

(d) First, second and third reserve linesof the rapid transit systems (whereapplicable).

4.6 Approval of Development Proposal

4.6.1 The Authority will approve thedevelopment proposal in writing if thefollowing requirements are compliedwith :

(a) Qualified person has complied withthe requirements of Clauses 4.2 to4.5 hereof and that all itemssubmitted are found to be in order;and

(b) Qualified person has fully demon-strated and confirmed that it isfeasible for the development worksto fully meet the technicalrequirements of Sections 10 to 12.

4.7 Departure or Deviation fromApproved Plan

4.7.1 In accordance with Regulation 5,amendment plan shall be submitted tothe Authority for approval if anydevelopment works depart or deviatefrom the approved plan.

4.7.2 No person shall carry out anydevelopment works in departure ordeviation from the approved plan unlessthe amendment plan has been approved.


SECTION 5

BUILDING PROPOSAL WITHIN RAILWAY PROTECTION ZONE

5.1 General

5.1.1 This section stipulates the proceduresand requirements for obtaining approvalfor a building proposal within therailway protection zone.

5.1.2 Plan for building works within therailway protection zone shall besubmitted to the Authority for approvalin accordance with Regulation 4.

5.2 Application for Approval of BuildingProposal

5.2.1 An application for the approval ofbuilding proposal shall be accompanied byone set of the following items :

(a) Plan for building works;

(b) Certified survey plan;

(c) Drainage Departments planningclearance letter on the proposedflood threshold levels for allentrances and openings in thedevelopment if it is connected orintegrated with the rapid transitsystems; and

(d) Engineering evaluation report ac-companied by plan for engineeringworks.

5.3 Information To Be Indicated On Planfor Building Works

5.3.1 Plan for building works shall be preparedin accordance with the requirements of theRegulations.

5.3.2 The first sheet of the plan shall bear therelevant standard declarations as given inClause 4.5.2.

5.3.3 The qualified person shall sign on everysheet of the plans and be responsible forthe accuracy of the details indicated.

5.3.4 The plan shall be drawn to a scale of 1:100or 1:200 or 1:250 generally, except for thesite plan which is to be presented in ascale of 1:500.



(b) Building and boundary lines ofbuilding;

(c) Location and clearances of thebuilding works in relation to the rapidtransit systems structure;

(d) First, second and third reserve lines ofthe rapid transit systems structure(where applicable);

(e) Existing ground level and proposedplatform level;

(f) Basement outline (if any);

(g) Discharge outlet from pump sumpin basement (if any); and

(h) Main roads including speciallandmarks.




(c) Horizontal and vertical clear distancesbetween rapid transit systemsstructure and the proposeddevelopment;

(d) First, second and third reserve lines ofrapid transit systems structure (whereapplicable);

(e) Depth of basement (if any);

(f) Details of proposed drainage systemincluding discharge outlet (if any);

(g) Proposed platform level if thedevelopment is connected orintegrated with the rapid transitsystems; and


(h) Affected drain lines and lightningprotection system of the rapid transitsystems.

5.3.7 Certified survey plan shall :

(a) Be prepared and submitted usingForm LTA DBC RAIL-SURVEY;

(b) Be endorsed by a registered landsurveyor after conducting aphysical geometric survey of therelevant sections of the rapid transitsystems structure (refer to Section 8on access to track and stationpremises);

(c) Indicate the scale, existingcontours, alignments, chainages,co-ordinates, levels and reservelines of the rapid transit systemsstructure;

(d) Indicate the boundary lines, lotnumbers and the existing structures.

5.4 Approval of Building Proposal

5.4.1 The Authority will grant approval for thebuilding proposal in writing if thefollowing requirements are compliedwith :

(a) Qualified person has complied withthe requirements of Clauses 5.2 and5.3 hereof and that all itemssubmitted are found to be in order;and

(b) The building and engineering workslayout including orientation and setback distances, clearances from therapid transit systems structure andthe proposed construction materialsfully satisfy the technical requirementsof Sections 10 to 12.

5.5 Departure or Deviation from ApprovedPlan

5.5.1 In accordance with Regulation 5,amendment plan shall be submitted to theAuthority for approval if any buildingworks depart or deviate from the approvedplan.

5.5.2 No person shall carry out any buildingworks in departure or deviation from theapproved plan unless the amendment planhas been approved.


SECTION 6

ENGINEERING WORKS WITHIN RAILWAY PROTECTION ZONE

6.1 General

6.1.1 This section stipulates the proceduresand requirements for obtaining a permitto commence engineering works withinthe railway protection zone.

6.1.2 Engineering works refer to any kinds ofconstruction works that may endanger oris likely to affect the structural integrityof the rapid transit systems structure andthe safety of its operation.

6.1.3 In accordance with Regulation 6, anapplication for a permit to commenceany works for which the plans have beenapproved under Regulation 4 or 5 shallbe made.

6.1.4 No engineering works shall commenceon site without the permission of theAuthority in writing.

6.2 Application for Permit

6.2.1 An application for permit to commence aspecific phase of engineering works shallbe accompanied by one set of thefollowing items :

(a) Plan for engineering works;

(b) Engineering evaluation report;

(c) Instrumentation proposal and initialinstrumentation readings;

(d) Method statement of work;

(e) Emergency procedure;

(f) Pre-condition survey report;

(g) Form LTA DBC RAIL-SUPV Undertaking to supervise workswithin the railway protection zone;and

(h) Relevant documents indicating plan-ning approval from the competentauthority.

6.2.2 The requirements for the above items aregiven in Clauses 6.3 to 6.10 forcompliance.

6.3 Plan for Engineering Works

6.3.1 Plan for engineering works shall beprepared in accordance with therequirements of the Regulations andendorsed by a qualified person.

6.3.2 Layout plans and cross sectional detailsshall indicate the following items :



(c) Vertical and horizontal distances ofthe engineering works (site prepar-ation, substructures and bui-ldingconstruction works, etc.) in relation tothe existing rapid transit systemsstructure; and

(d) First, second and third reserve lines ofthe rapid transit systems structure andthe line of influence (whereapplicable).

6.4 Engineering Evaluation Report

6.4.1 Engineering evaluation report shall beprepared and endorsed by a qualifiedperson.

6.4.2 The above report shall address thefollowing items :

(a) Predicted movements (as categ-orised in Table 12.1 of Section 12)at relevant stages of constructionand at completion of thedevelopment works of the existingrapid transit systems structure due tothe proposed engineering works.The evaluation shall include thefollowing items :

(i) Detailed examination of theground conditions at site;


(ii) Calculations for the deri-vations of the predictedmovements; and

(iii) Appropriate sensitivity ana-lysis to check that theassessment would not beaffected by any variation ininput parameters and con-ditions that may occur duringall stages of the constructionwork.

(b) Assessment of the likely effects ofmovement on the existing rapidtransit systems. The effects onstructural integrity, track beds,structural gauge clearances, drainageof the existing rapid transit systems,etc. shall be considered.

(c) Proposals for any special measures oradvance works needed to minimisethe susceptibility of the existing rapidtransit systems to damage and toensure the continuation of safe train-operating conditions.

(d) Proposals for rectification works tothe existing rapid transit systemsstructure. These may includespecifications for remedial groutingor structural repair, requirements toadjust the track during or subsequentto construction, the need to re-alignthe affected drains, etc.

(e) The report shall clearly demonstratethat the performance requirements inSection 11 are fully met after allworks have been completed.

6.4.3 Notwithstanding the above, the Authorityreserves the right to specify any otherrequirements on the engineeringevaluation report which are deemednecessary for the safeguarding of the rapidtransit systems.

6.5 Instrumentation Proposal

6.5.1 Instrumentation proposal shall beprepared and endorsed by a qualifiedperson.

6.5.2 The proposal shall include the followingitems :

(a) Comprehensive monitoring systemto monitor the behaviour of the

existing rapid transit systems and the ground adjacent to it;

(b) Layout plans and relevant cross-sections indicating the locations ofproposed instruments relative to therapid transit systems structure;

(c) Details of the instruments orequipment, including the types,function of instruments, depth ofinstallation, etc.;

(d) Frequency of monitoring;

(e) Valid calibration certificates for theinstruments proposed (whereapplicable); and

(f) Schedule for instrument installationwithin the premises of the rapidtransit systems structure indicatingthe number and frequency of accessrequired.

6.5.3 In preparing the above proposal, thequalified person shall comply with therequirements stipulated in Appendix E -Guidelines for Instrumentation Proposal.

6.5.4 For any installation of instruments in thetrainway, the requirements in Section 9shall also be complied with.

6.5.5 A copy of the initial readings shall besubmitted to the Authority for the releaseof permit to commence work.

6.6 Method Statement of Work

6.6.1 Method statement for carrying out anyengineering works shall be prepared andendorsed by a qualified person.

6.6.2 The proposal shall be accompanied by thefollowing items :

(a) Layout plan showing the location ofthe engineering works relative to therapid transit systems structure;

(b) Write-up on the step-by-stepsequence of carrying out each phaseof works or activities; and

(c) Hazard analysis identifying allpossible risks that may be posed tothe rapid transit system and adescription of the safety andprecautionary measures to mitigatethese risks.


6.7 Emergency Procedure

6.7.1 An emergency procedure prepared usingthe standard format given in Appendix Cshall be endorsed and submitted by aqualified person.

6.8 Pre-Condition Survey Report

6.8.1 A condition survey report (includingphotographic record of the rapid transitsystems structure) shall be prepared andendorsed by an independent person whohas the appropriate qualifications, forexample, professional engineer orbuilding surveyor.

6.8.2 Condition surveys to be undertaken shallinclude physical surveys of rapid transitsystems structure to be carried out by aregistered land surveyor. (The procedureto apply for access to the rapid transitsystems tracks and station premises isgiven in Section 8).

6.9 Undertaking for Supervision

6.9.1 Qualified person appointed underRegulation 9 for supervision shallcomplete the letter of undertaking usingForm LTA DBC RAIL-SUPV and submitit to the Authority together with theapplication for permit to commencework.

6.9.2 The above form shall be resubmittedwhenever there is a change in thequalified person appointed forsupervision.

6.10 Commencement of Work

6.10.1 The Authority will issue the permit tocommence works in writing if thefollowing requirements are compliedwith :

(a) Qualified person has complied withthe requirements of Clauses 6.2 to6.10 hereof and that all itemssubmitted are found to be in order;and

(b) Qualified person has fullydemonstrated that the proposalsatisfies the technical requirementsof Sections 10 to 12.

6.10.2 Clearance from the Development &Building Control Department of theAuthority shall be obtained before thecommencement of construction worksincluding soil investigation andfoundation works on site.


6.11.1 In accordance with Regulation 5,amendment plan shall be submitted tothe Authority for approval if anybuilding works depart or deviate fromthe approved plan.

6.11.2 No person shall carry out any buildingworks in departure or deviation from theapproved plan unless the amendmentplan has been approved.


SECTION 7

SUPERVISION OF WORKS WITHIN RAILWAY PROTECTION ZONE

7.1 General

7.1.1 In accordance with Regulation 9, thedeveloper shall appoint and notify theAuthority of the qualified personsupervising the building works.

7.2 Duties of Qualified Person

7.2.1 In addition to the duties stipulated underRegulation 9 and 10, the qualified personshall carry out the duties specified in thissection.

7.3 Monitoring of Rapid Transit Systems

7.3.1 The qualified person shall continuouslymonitor the effects of construction workson the rapid transit systems structure,tracks and the ground. He shall analysethe monitoring results, predict the likelytrend and notify the Authority of anydeviation from the predicted results andtrends. He should make proposal tochange his method of working or toimplement an emergency plan as a resultof monitoring.

7.3.2 Once the monitoring readings are taken,they shall be submitted to the Authoritywithout delay. A report of the reviewand the monitoring results endorsed by aqualified person shall be submitted to theAuthority within a week from the date ofmonitoring.

7.3.3 During the progress of the works, if itbecomes apparent from the monitoringresults that the ground movement and/orthe structural movement are likely toexceed the limits, the Authority mayorder the works to be stopped. Thedeveloper shall take additional measuresto control movements to within theacceptable limits, all at the cost andexpense of the developer before thework is allowed to resume.

7.3.4 The monitoring shall continue until allworks that may affect the movement ofthe rapid transit systems structure havebeen completed and the monitoringresults show that the rapid transitsystems structure and the surrounding

ground have stabilised and no furthermovement or change would beanticipated.

7.4 Protection of Rapid Transit SystemsStructures and Facilities

7.4.1 Preventive measures shall be taken toprevent any damage to the existing rapidtransit systems structure and facilitiesincluding its drainage systems, the floortiles or finishes, the exposed lightningconductors running along the surface ofthe viaduct columns, earthing pits orearthing rods, etc. during theconstruction stage.

7.5 Completion of Work

7.5.1 Condition surveys shall be carried outupon completion of the proposed worksor at intermediate stages as directed bythe Authority. Defects found shall behighlighted and compared with thefindings of precondition survey.

7.5.2 A proposal on the reinstatement of alldefects found in the rapid transit systems(including that of its facilities and tracks)prepared and endorsed by the qualifiedperson shall be submitted to theAuthority for prior approval.

7.5.3 Reinstatement of the defects in the rapidtransit systems shall be completed to thesatisfaction of the Authority. The developershall bear all direct or indirect costs arisingfrom the rectification works.

7.5.4 A final condition survey shall beconducted upon the completion of allreinstatement work. Defects rectifiedshall be highlighted and compared withthose found after the completion of workin the final condition survey report.

7.6 Release of Certificate of StatutoryCompletion Clearance

7.6.1 The qualified person shall make anapplication to the Authority to issueclearance for the release of the certificateof statutory completion.


7.6.2 An application for clearance of certificateof statutory completion shall beaccompanied by one set of the followingitems :

(a) As-built building, structural andfoundation plans and details signedby the qualified person;

(b) Form LTA DBC RAIL-CSC-BW;

(c) Form LTA DBC RAIL-CSC-PW( if applicable);

(d) Form LTA DBC RAIL-CSC-SW(if applicable); and

(e) Final condition survey report.

7.6.3 The Authority will issue clearance forthe release of certificate of statutorycompletion in writing if the followingrequirements are complied with :

(a) Qualified person has complied withthe requirements of Clause 7.6.2hereof and that all items submittedare found to be in order;

(b) The development is completed inaccordance with the approved plans;and any damage or defectiveinstallation is rectified to thesatisfaction of the Authority.


SECTION 8

ACCESS TO TRACK AND STATION PREMISES

8.1 General

8.1.1 This section stipulates the procedure forsubmitting an application to gain accessto the rapid transit systems tracks orstation premises.

8.1.2 Access to track can only be obtainedduring non-operational hours of trains.All personnel working in rapid transitsystems premises shall abide by the rulesand conditions of the LTA and itslicensed railway operator.

8.2 Application for Access

8.2.1 Application on access to track or into thestation premises shall be made usingForm LTA DBC RAIL-ACCESS to theAuthority at least two weeks in advanceof the access required.

8.2.2 The applicant shall clearly state thefollowing items :

(a) The reason(s) for requesting anaccess to the track or into the stationpremises;

(b) The names and identification cardnumbers of all personnel gainingaccess to the track or into the stationpremises;

(c) List and details of equipment, toolsto be brought to the track or into thestation premises

8.3 Granting of Access

8.3.1 The Authority will only proceed toarrange with the railway operator for therequested access if the application formis found to be in order and the reason(s)for requesting the access is acceptable.

8.3.2 The applicant will be notified in writingonce the access is granted. The actualdate and time of track access are,however, determined by the railwayoperator. The applicant shall liaise withthe Authoritys officer to finalise thedate of access.

8.3.3 All persons working on track arerequired to wear proper clothing, highvisibility vests and safety shoes. Thosewho fail to comply with this rule will notbe permitted to access the track.

8.3.4 All persons working on track or withinthe station premises shall comply withthe rules and regulations of the railwayoperator and instructions from theAuthoritys officer-in-charge.


SECTION 9

INSTALLATION OF INSTRUMENTS IN TRAINWAY

9.1 General

9.1.1 This section stipulates the procedure andrequirements for obtaining approval forthe installation of instrument that mayinfringe into the structural gauge of theoperating rapid transit systems tunnel ortrainway.

9.1.2 All instruments to be installed in thetrainway shall be submitted to theAuthority for approval before trackaccess can be granted for the installationworks.

9.2 Application for Instrument Installation

9.2.1 An application for the approval ofinstrument installation in trainway shallbe accompanied by one set of thefollowing items :

(a) Instrumentation layout plan;

(b) Tunnel or trainway cross-sectionalplans;

(c) Plans and calculations on fixingdetails;

(d) Document stating the name andparticulars of the appointed regis-tered surveyor and his assignee (ifany) responsible for checkingstructural gauge clearance ofinstruments installed on site; and

(e) Document stating the name andparticulars of the appointed pro-fessional engineer (civil) and hisassignee (if any) responsible forchecking fixing details of instru-ments installed on site.

9.3 Information To Be Indicated On Plans& Calculations

9.3.1 Instrumentation layout plan shall showthe following items :

(a) Registered surveyors endorsementon every plan;

(b) Scale of drawing;

(c) Rapid transit systems tunnel ortrainway alignment with respect tothe development site; and

(d) Chainages of all instrument loca-tions.

9.3.2 Tunnel or trainway cross-sectional plans(refer to sample drawing nos.LTA/DBCCPRP/005-007) shall show thefollowing items :

(a) Registered surveyors endorsementon every plan for structural gaugeclearance;

(b) Professional engineer (civil)sendorsement on every plan forfixing details;

(c) Correct scale of drawing;

(d) Chainage of tunnel or trainwaycross-sections;

(e) Direction of tunnel or trainwaycross-section, i.e., orientation facingtowards a particular station ortowards increasing chainage;

(f) Horizontal & vertical offsets ofoutmost object protrusion towardsthe track, with reference from theinner side of the lower rail;

(g) Cant of track in the direction ofcross-section;

(h) Horizontal throw;

(i) Structure gauge profile withoutthrow or with throw (if applicable);and

(j) All instruments including bracketsare indicated to be outside thestructure gauge.

9.3.3 Fixing details and calculations shallshow the following items :

(a) Professional engineer (civil)sendorsement on the first and lastsheets of calculations;


(b) 3-dimensional details of instru-ments, brackets (including mountingholes & any extendable parts), holddown bolts, fixing details of cables,etc.;

(c) Specifications of all instruments,cables (conforming to the railwayoperators requirements), etc.; and

(d) Design calculations on all fixingincluding hold down bolts, anch-orage, etc.

9.4 Approval for Instrument Installation

9.4.1 The Authority will stamp Approved forInstallation on every sheet of theproposal plans for the installation ofinstrument in the trainway if all therequirements listed in Clauses 9.2 and9.3 hereof are complied with.

9.4.2 The Authoritys officer will not allowany installation in the trainway that donot meet the details shown on theapproved drawings. Modification oralteration of any details which may berequired due to site constraints shall besubmitted to the Authority for approvalfirst before actual installation.

9.5 Supervision of Installation

9.5.1 The registered surveyor and professionalengineer (civil) whose names appear onthe approved plans shall be fullyresponsible for the supervision ofinstrument installation as shown on theapproved plans.

9.5.2 In the event the registered surveyor orthe professional engineer (civil) cannotbe in attendance on site, subject to theapproval of the Authority, they shallappoint an experience assignee(s) to actand suitably discharge their respon-sibilities as required. Notwith-standingsuch assignment, the registered surveyorand professional engineer (civil) shall bedeemed fully responsible for all actiontaken by the assignee with or withouttheir consents or sanctions.

9.5.3 Upon completion of the installationworks, the registered surveyor and theprofessional engineer (civil) or theirassignee(s) shall sign on the certificateof supervision Form LTA DBC RAIL-INSTR and submit it to the Authoritysofficer prior to leaving the tunnel ortrainway.


SECTION 10

TECHNICAL REQUIREMENTS FORDEVELOPMENT AND BUILDING WORKS WITHIN RAILWAY PROTECTION ZONE

10.1 General

The technical requirements fordevelopment and building works withinthe railway protection zone comprise ofthe following components that arestructured as shown in diagram 10.1 :

(a) The objectives;

(b) The functional statements;

(c) The performance requirements withwhich all development solutionsmust comply; and

(d) The development solutions.

10.2 Compliance with Code

A development solution will complywith the Code if it satisfies theperformance requirements.

10.3 Meeting the Performance Require-ments

Compliance with the performancerequirements can only be achieved by :

(a) complying with the deemed-to-satisfy provisions; or

(b) formulating an alternative solutionwhich :

(i) complies with the performancerequirements; or

(ii) is shown to be at least equiv-alent to the deemed-to-satisfyprovisions; or

(c) a combination of (a) and (b)

10.4 Objectives and Functional Statements

The objectives and functional statements are to beused as an aid to the interpretation of therequirements in this Code.

GuidanceLevels

ComplianceLevels

Development Solutions

Deemed-to-Satisfy Alternative Solutions Provisions

Assessment Methods Documentary evidence Verification Methods Expert Judgments Comparison with Deemed-to-Satisfy Provisions

Objectives

FunctionalStatements

Performance Requirements

Diagram 10.1Structure of Technical Requirements


10.5 Deemed-to-Satisfy Provisions

A development solution that complieswith the deemed-to-satisfy provisions asgiven in Section 12 is deemed to complywith the performance requirements.

10.6 Alternative Solutions

(a) An alternative solution must beassessed according to one or moreof the assessment methods.

(b) An alternative solution will onlycomply with the Code if theassessment methods used todetermine compliance with theperformance requirements havebeen satisfied.

10.7 Assessment Methods

The following assessment methods, orany combination of them, shall be usedto determine a development solutionwhich complies with the performancerequirements :

(a) Evidence to support that the form ofconstruction or design meets aperformance requirement or a deemed-to-satisfy provisions as described inClause 10.5 hereof.

(b) Verification methods

The verification methods shallinclude any method deemed relevantor appropriate by the appointedexpert(s) or such other methods asthe appropriate authority accepts fordetermining compliance with theperformance requirements. Theverification methods shall alsoinclude a detailed assessment of therisks or hazards which the rapidtransit systems will be subjected to,and the effective measures tomitigate these risks.

(c) Comparison with the deemed-to-satisfy provisions

(d) Expert judgments

The expert (group or individual)shall make his judgment based onindependent factual information andexperience. He shall be responsiblefor all evaluation and necessaryinformation used to arrive at thisjudgment.

The basis of his judgment shall beclearly stated and must bedemonstrated to be applicable andrelevant to the local environmentaland ground conditions.


SECTION 11

PERFORMANCE PROVISIONS

11.1 Structural Integrity of Rapid TransitSystems

Objectives

O11.1 The objectives are to :

(a) safeguard structural integrity ofrapid transit systems againstdamage arising from developmentor building works; and

(b) protect the rapid transit systemsstructure against physical damagedue to development or buildingworks.

Functional Statement

F11.1 The development or building works mustnot subject the rapid transit systemsstructure to a combination of loads orother actions that will impair theirintegrity.


P11.1 The design and construction ofdevelopment or building works mustmake adequate provisions to check andensure that the rapid transit systemsstructure are capable of sustaining at anacceptable level of safety andserviceability under :

(a) the most adverse combination ofloads;

(b) the most adverse movements; and

(c) other actions

to which the rapid transit systemsstructure may reasonably be subjectedto.

11.2 Operational Safety of Rapid TransitSystems

Objectives

O11.2 The objectives are to :

(a) safeguard and protect the safepassage of trains operating in therapid transit systems from changesto the structures and tracks causedby development or building worksin railway protection zone; and

(b) ensure that the operations of therapid transit systems station are notaffected by the development orbuilding works.

Functional Statements

F11.2 The development or building works mustnot :

(a) result in changes to the tracksmaking it unsafe to operate trains;

(b) cause deformation of the rapidtransit systems structure that willprevent safe passage of trains;

(c) affect safe passage of public; and

(d) disrupt the mechanical and electricalservices in the rapid transit systems.


P11.2 The design and construction ofdevelopment or building works mustmake adequate provisions to check andensure that :

(a) the rapid transit systems structureand tracks are not subjected todeformation and changes that willnot allow trains to operate at themaximum design speed;


(b) the impact on the rapid transitsystems structure and tracks is notsuch that the safety and comfort ofpassengers are compromised;

(c) there is no obstruction to the freeflow of public moving in and out ofthe rapid transit systems station; and

(d) the performance of the mechanicaland electrical services aremaintained.

11.3 Fire Safety and Inspection / Main-tenance of Rapid Transit Systems

Objectives

O11.3 The objectives are to ensure that :

(a) the provisions of fire safetymeasures and fire protection worksfor the rapid transit systems areadequately provided for and areacceptable arising from integrationof any development or buildingworks; and

(b) there are adequate provisions ofaccess and facilities for inspectionand maintenance of the viaductcolumns, beams and bearings areadequately provided in thedevelopment.


F11.3 The development or building works mustnot subject the rapid transit systems tofire hazard and to prevent accessibilityfor inspection and maintenance.


P11.3 The design and construction ofdevelopment or building works must becarried out in such a manner as to ensurethat :

(a) there is provision of adequateprotection of the rapid transitsystems from the spread of fire fromthe development or building works;

(b) there is provision of adequate egresscapacity for the rapid transit systemsfrom the most remote point in therapid transit systems to the point ofsafety;

(c) there is no re-circulation of smokeinto the rapid transit systems in theevent of station fire or fire from thedevelopment or building works;

(d) provision of fire fighting measuresin the rapid transit systems is notcompromised;

(e) there is provision of adequatefacilities for the inspection andmaintenance of viaduct columns,beams and bearings; and

(f) lightning protection and drainagesystems of the rapid transit systemsare not adversely affected orcompromised.

11.4 Flood Protection of Rapid TransitSystems

Objective

O11.4 The objective is to protect the safety ofpeople in the rapid transit systems fromingress of water due to flooding or othermeans.


F11.4 The development or building works mustnot subject the rapid transit systems toingress of water due to flooding or othermeans.


P11.4 The design and construction ofdevelopment or building works withunderground connections to the rapidtransit systems must make adequateprovisions to :

(a) prevent the ingress of water intorapid transit systems due to floodingor other means including run offfrom the surface; and


(b) avoid the likelihood of waterdischarged or redirected into therapid transit systems.


SECTION 12

ACCEPTABLE CONSTRUCTION

12.1 General Requirements in All Reserveswithin Railway Protection Zone

Appropriate Performance Requirements

Where an alternative approach to engineeringworks in all reserves is proposed to thatdescribed in this Section, that proposal mustcomply with Performance Requirements P11.1to P11.4 in Section 11.

Acceptable Construction Practice

Compliance with this Section satisfiesPerformance Requirements P11.1 to P11.4 forengineering works in all reserves.

12.1.1 Structural and Track Limits

The design and construction ofdevelopment or building works withinthe railway protection zone shall satisfythe requirements of Table 12.1 relatingto the allowable structural and tracklimits for all types of rapid transitsystems.

12.1.2 Monitoring of Rapid Transit Systems

The rapid transit systems structure andthe adjacent ground affected by thedevelopment or buildings works withinthe railway protection zone shall bemonitored for any adverse effects thatmay affect the safety of the rapid transitsystems. The behaviour of the rapidtransit systems track shall be monitoredbased on the limits for twist, vertical dipor peak and horizontal versine given inTable 12.1 if the proposed developmentis likely to cause any rotation of thetrack. The guidelines for instrumentationproposal as given in Appendix E shall bestrictly complied with.

12.1.3 Restricted Activities

The rapid transit systems shall beprotected against risks posed byrestricted activities arising from anydevelopment or building works.Reference should be made to thedocument entitled Guide to Carryingout Restricted Activities within RailwayProtection and Safety Zones.

Table 12.1 Allowable Limits for Rapid Transit Systems Structure and Track

STRUCTURE TRACK*

IMPOSED LOAD (kN/m2)# MOVEMENT (mm)*

COVER UNDER ROADWAY (m)SYSTEMS TYPE OF RAPID TRANSITSYSTEMS STRUCTURE

1.5 > 1.5

NOT UNDER##ROADWAY

TOTALMOVEMENT

IN ANYDIRECTION

DIFFERENTIALMOVEMENT IN ANY

PLANE

PEAKPARTICLEVELOCITY

(mm/sec)

TWIST/CHANGEIN CANT

VERTICALDIP OR PEAK

HORIZONTALVERSINE

Bored Tunnel

UndergroundTransition &Sub-aqueous Cut & Cover

Tunnel &Station

(a) HA loading or 45 units ofHB loading dispersed inaccordance with BS5400 Part2 and HB vehicle placedwithin the central 5m of thecarriageway and no HAloading in combination withthe HB vehicle.

15 15 15 15 or 1:1000(whichever is lesser) 151.5mm

(measuredover 2.5m)

or1:1666

5mm(measured over

5m chord)

15mm(measured over15.8m chord)

Viaduct 15 or 1:1000(whichever is lesser)AboveGround

Station

15 15 15 15

5+

15 As above As above As above

Embankment - - 40(outside 1st reserve)

MRT fromPSR-BNL,MRB-WDL-JUR,TNM-APT

At GradeCutting - - 15(outside 1st reserve)

15 15 or 1:1000(whichever is lesser) 15 As above As above As above

Bored TunnelMRT fromWorldTradeCentreStation toPunggolStation

UndergroundTransition &Sub-aqueous

Cut & CoverTunnel &Station

As for [(a) + 7.5] or 22.5,whichever is greater 22.5 22.5 15

15 or 1:1000(whichever is lesser) 15 As above As above As above

ViaductAboveGround

Station


10+ or 1:500(whichever is lesser)Bukit

PanjangLRT

At Grade Cutting - - 15(outside 1st reserve) 10 10

15 NotApplicableNot

ApplicableNot

Applicable

ViaductSengKang& PunggolLRT

AboveGround

Station


15+ or 1:500(whichever is lesser) 15

NotApplicable

NotApplicable

NotApplicable

Note : * Values to be adopted unless otherwise advised by the Authority at Development Plan Stage. The interpretation of track twist, vertical and horizontal alignments is given in Drawing no. LTA/DBC/CPRP/011.Track values above refer to the allowable deformations to the track in comparison with the conditions prior to construction activities.

+ This is dependent on the design capacity of the bearings and the structure system of the different rapid transit structure. Other structural constraints such as tie beams and cross beams that form an integral part of the rapidtransit systems viaducts in the particular rapid transit systems station must be considered in detail when applying these guidelines.

# Load that the rapid transit systems structure, except for sub-aqueous structures, are designed for.## For structures influenced by load imposed from an existing building, the self weight of the existing building with appropriate allowance for live load in accordance with BS 6399 shall be applied as imposed load at the

foundations level of the building. Where the effect of this load is less than the surcharge given in Not Under Roadway, the values under this category shall be adopted.


12.2 Site Preparation Works


Where an alternative approach to sitepreparation works in all reserves is proposed tothat described in this Section, that proposalmust comply with Performance RequirementsP11.1 to P11.4 in Section 11.


Compliance with this Section satisfiesPerformance Requirements P11.1 to P11.4 forsite preparation works provided therequirements of Section 12.1 are also compliedwith.

12.2.1 Mobilization Works

12.2.1.1 Mobilization works within the railwayprotection zone shall satisfy theconditions in Table 12.2.1.1.

12.2.2 Demolition Works

12.2.2.1 Demolition works are generallyallowed within the railway protectionzone except above undergroundstations and transition structures.

Table 12.2.1.1 Mobilization Works

First Reserve Outside First Reserve

All

Type

s of R

apid

Tra

nsit

Syst

ems S

truct

ures

(a) Storage or placement of any constructionmaterials, temporary storage ofinflammable fluid, gas cylinders, etc. arenot allowed.

(b) Movement, operation or parking of anymechanical plants are not allowed.

(c) Erection of temporary structures such assite offices, tents, scaffolding, hoarding,etc. are not allowed.

(d) Digging of trenches or pits or dumping ofearth are not allowed.

(e) Access under the railway must haveheight restriction gantries on both sides ofthe viaduct beam erected.

The first, second and third reserve lines ofthe rapid transit systems (where applicable)must be pegged and demarcated clearly onsite by a registered land surveyor based onthe approved certified survey plan. Detailsof first reserve line shall follow the typicalcross section in Drawing no.LTA/DBC/CPRP/008.


12.3 Substructure Works


Where an alternative approach to substructureworks in all reserves is proposed to thatdescribed in this Section, that proposal mustcomply with Performance Requirements P11.1to P11.4 in Section 11.


Compliance with this Section satisfiesPerformance Requirements P11.1 to P11.4 forsubstructure works provided the requirementsof Section 12.1 are also complied with.

12.3.1 Footing and Rafts

12.3.1.1 Footing and rafts within railwayprotection zone shall satisfy theconditions in Table 12.3.1.1

Table 12.3.1.1 Footing and Rafts


Und

ergr

ound

,Tr

ansi

tion

& S

ub-a

queo

us

Not allowed if footing and raftsconstruction involves excavationwithin this reserve.

Allowed.

At g

rade

Same as above. Allowed.

Abo

ve g

roun

d Allowed if the design and layoutof footing and rafts allow for theinspection and maintenance of theviaduct structures including thatof bearing replacement.

Allowed.


12.3.2 Piling and Drilling Works

12.3.2.1 Piling works including the constru-ction of foundation piles, temporary orpermanent earth retaining walls andany other drilling works within therailway protection zone shall satisfythe conditions in Table 12.3.2.1.

Table 12.3.2.1 Piling Works

Outside First ReserveFirst Reserve

Second Reserve Third Reserve

Cle

aran

ce

Not allowed*Allowed if piles are kept at least 6m clear on planfrom the exterior edge of rapid transit systemsstructure.

Allowed.

Deb

ondi

ng

Not applicable.Load bearing piles within the zone of influence ofrapid transit systems structure shall be debondedaccording to the requirements of Clause 12.3.2.2.

Not Required.

Und

ergr

ound

, Tra

nsiti

on o

r Sub

-aqu

eous

Met

hod

of In

stal

latio

n

Not applicable.

(a) Piles shall generally be constructed byaugering or reverse circulation drillingtechniques.

(b) Stability of the ground shall be ensured by theuse of casings and/or drilling mud asappropriate.

(c) Use of percussively driven concrete piles, steelH-piles, sheetpiles or tanalised timber piles isnot acceptable.

(d) Use of rock chopping chisels is prohibited.

(e) Use of vibratory method of installing andextracting sheetpiles, H-piles or casings isprohibited.

Rock chisellingand percussivepiling techniquesis acceptable.

Cle

aran

ce

Not allowed. Allowed. Allowed.

At g

rade

Met

hod

ofIn

stal

latio

n

Not applicable.

(a) Use of percussively driven concrete piles, steel H-piles, sheetpiles ortanalised timber piles is not acceptable.

(b) Use of drilling fluid in the drilling of piles shall be carefullycontrolled to prevent an increase in the piezometric head within therailway protection zone.

Abo

ve g

roun

d

Cle

aran

ce

Not allowed. Allowed if piles are kept at least 3m clear on plan of the toe of the existingraker pile supporting the rapid transit systems structure.

* The following may be considered on case-by-case basis :(a) Piling, retaining walls and boreholes which are located less than 6m but more than 3m horizontally from the

extreme edge of rapid transit systems structure; and(b) Limited bakau piling terminating at least 3m above the crown of the rapid transit systems tunnels or

underground structures.


12.3.2.2 Debonding of Load Bearing Piles

(a) Load bearing piles shall bedesigned so they are debondedwithin the zone of influence of theunderground, transition or sub-aqueous structures. They shalldevelop their load capacitieseither in shear or end bearingfrom soil located below the zoneof influence (see Drawing nos.LTA/DBC/ CPRP/001-002) of theunderground, transition or sub-aqueous structures.

(b) Details of the proposal includingthe thickness of all casings, gapbetween inner and outerpermanent casings, type andthickness of debonding mem-brane, etc. shall be clearly shown.

(c) The installation sequence andprocedure including the measuresto prevent concrete flowing intothe gap between the inner and

outer permanent casings duringconcreting shall also be included.

(d) For piles with single permanentcasing, temporary casing shall beprovided to prevent the debondingmembrane on the permanentcasing from being damaged duringinstallation.

(e) All temporary casing shall beinstalled to the debonding level toprevent the ground from movinginto the borehole.

(f) Where piles within the first reserveof the rapid transit systemsstructure are permitted, doublepermanent casing debonding, or anequivalent alternative, shall beprovided.

(g) Details for a single and doublecasing debonding system asillustrated in Drawing nos.LTA/DBC/ CPRP/009-010 shall beadopted.


12.3.3 Excavation and Dredging Works

12.3.3.1 Excavation and dredging works withinthe railway protection zone shallsatisfy the conditions in Table 12.3.3.1

Table 12.3.3.1 Excavation and Dredging Works


Und

ergr

ound

or T

rans

ition

Not allowed*

Allowed subject to :

(a) Piezometric Pressure in Compressible Soil The piezometric pressure in compressible soils within the

first and second reserves shall not be reduced by morethan 10kPa. For the purpose of this clause, compressiblesoils shall be taken as fill and soils of the Kallang,Tekong and Transitional members as defined in AppendixD. Where the rapid transit systems structure is supportedon piles or other foundations extending below thecompressible layer, this clause may be waived.

(b) Cut-off Wall No trench, excavation, caisson, pile or well deeper than

1m below the existing ground water level shall be allowedunless suitable measures such as installation of cut-offwall, excavation under stabilising fluid or mud, etc. aretaken to control the reduction of piezometric pressure.

(c) Basement Construction Where basements are more than 1m below the existing

ground water table, they shall be made watertight. Thebase slab shall be designed for full hydrostatic pressures,and pressure relief in the form of weep-holes or drainageblankets is not allowed.

(d) Tunnel Construction Where tunnel construction works are permitted, the

temporary or permanent linings shall be made watertightto prevent any seepage of water into the proposed tunnelsunder both temporary and permanent conditions.

Sub-

aque

ous

Not allowed* Same as above.

At g

rade

Not allowed. Same as above

Abo

vegr

ound

Not allowed. Allowed subject to item (c) above if lowering of the groundwater table is expected due to the excavations.

* The following may be considered on case-by-case basis :(a) Excavation greater than 2m depth but stops above 3m vertically of the rapid transit systems tunnel may be

considered on a case-by-case basis.(b) Dredging of seabed or riverbed shall not exceed 3.8m below the Singapore Survey Department Mean Sea

Level.


12.3.4 Ground Anchors or Tie Backs

12.3.4.1 The use of ground anchors or tie backswithin railway protection zone shallsatisfy the conditions in Table12.3.4.1.

Table 12.3.4.1 Ground Anchors or Tie Backs

Outside First ReserveFirst Reserve

Second Reserve Third Reserve

Und

ergr

ound

,Tr

ansi

tion

& S

ub-a

queo

us

Not allowed. Not allowed. Allowed.

At

grad

e

Not allowed. Not allowed. Allowed.

Abo

vegr

ound

Not allowed. Allowed if ground anchors or tie backs are kept at least

3m clear on plan of the toe of the existing raker pilesupporting the rapid transit systems structure.

12.3.5 Blasting

12.3.5.1 Blasting is not permitted within therailway protection zone. For blastingwithin the railway safety zone,reference should be made to thedocument entitled Guide to Carryingout Restricted Activities within theRailway Protection and Safety Zones.


12.4 Building Works in All Reserves


Where an alternative approach to buildingworks in all reserves is proposed to thatdescribed in this Section, that proposal mustcomply with Performance Requirements P11.1to P11.4 in Section 11.


Compliance with this Section satisfiesPerformance Requirements P11.1 to P11.4 forbuilding works in all reserves.

12.4.1 Building adjacent to above groundstructure

12.4.1.1 The layout and design of any buildingadjacent to the above ground rapidtransit systems structure shall complywith the conditions below :

(a) The building shall be at least 6mclear or the separation distancecalculated for unprotectedopening in accordance with theCode of Practice for FirePrecaution in Building 1997,whichever is greater, of theoutermost edge of the rapid transitsystems structure as shown indiagram 12.4.1.1(a) below; and

(b) The building shall be orientatedpreferably with the end walls

facing the rapid transit systemsstructure. The building facadefacing the rapid transit systemsstructure shall be designed suchthat incidence of Killer Litterthat will affect the safety ofrailway will not occur. Adequatescreening of windows or openingsshall be provided where necessary.

12.4.2 Building under viaduct

12.4.2.1 The layout and design of any buildingunder the viaduct shall comply with theconditions below :

(a) The building structure shall bedesigned for access to allow forinspection and maintenance of theviaduct structures including bear-ing replacement;

(b) Columns enclosed within buildingshall be provided with a 25mmthick plaster all round;

(c) The development shall not transferany loading on to the viaductstructure;

(d) The building external walls androof within 6m from the exteriorof the viaduct shall have a fireresistance of at least 2-hour firerating as shown in diagram12.4.2.1(d);

Set backaccording toClause12.4.1.1(a)

EXISTINGRTS

STRUCTURE

PROPOSEDBUILDING

Diagram 12.4.1.1(a)Separation distance between proposed building and above ground structure


(e) Building roof shall be at least0.75m clear below the viaductbeam soffit level as shown indiagram 12.4.2.1(d);

(f) There shall be no placement ofequipment such as air-concondenser above the level of thebuilding roof;

(g) Viaduct drainage system, ifaffected, should be suitablydiverted. Building drainagesystem shall not be dischargedinto the viaduct drainage system;

(h) The viaduct lightning protectionsystem, if affected, should besuitably diverted, reinstated andtested;

(i) An automatic fire protection sys-tem in compliance with SS CP 10shall be provided. Building owneris required to engage a qualifiedperson to carry out annual checkof the fire alarm system and tocertify it to be in good workingcondition;

12.4.3 Building over trainway within an aboveground station

12.4.3.1 Any development with habitable floordirectly above a trainway within anabove ground station or around thetrainway within the station, theelements of structure around thetrainway shall be built with fireresistance of not less than 4 hours asshown in diagram 12.4.3.1

GroundLevel

ViaductColumn

Viaduct Beam

Minimum 750mm

2-hr fire rated roof

Diagram 12.4.2.1(d)Clearance of building roof below viaduct

6m 6m

2-hr fire rated external wall


Diagram 12.4.3.1Fire resistance of elements of structure around the trainway in an above ground station

MRT STATION ANCILLARY AREA

FUTURE DEVELOPMENT

Note A : All elements of structure shall not be less than 4 hours fire rating.

See

Not

e A

See

Not

e A


12.4.4 Building with integration or interfacewith rapid transit systems station

Building with integration or interfacewith rapid transit systems stationshall satisfy the requirements ofClauses 12.4.4.1 to 12.4.4.3.

12.4.4.1 Fire Safety Requirements

Where the rapid transit systems stationincluding its entrances or any of its firesafety works are affected, theconditions in Tables 12.4.4.1(a) to12.4.4.1(d) shall be satisfied.

Table 12.4.4.1(a) Building with Integration or Interface with Station Entrance

Fire Safety Requirements

Bui

ldin

g In

terf

aced

with

Ent

ranc

e of

an

Und

ergr

ound

Sta

tion

(a) Unobstructed egress from the entrance to the external shall be provided. The egresswidth shall not be less than the total width of the entrance stairs and escalators.

(b) The proposed building shall be separated from the station entrance, other than theegress opening to the external, with fire barriers having at least 2 hours fire resistance.

(c) There shall be no unprotected openings of occupancy area within 3 m of the ventilationopenings located in the external wall of the entrance.

(d) If fire-rated shutters are installed to provide the fire separation as required in (b) above,these automatic fire-rated shutters shall be operated by smoke detectors installed ateither side of the fire-rated shutters.

(e) These automatic fire-rated shutters after closing by activation of the smoke detectorsshall remain closed and be rendered inoperative until the control system which thesmoke detectors are connected to is manually reset.

(f) An alarm signal from the fire-shutter control panel (on the closing of the shutters) shallbe transmitted to the station's Supervisory Control System. Upon receiving the alarmsignal, an audible and visual alarm shall be activated at the Station Control Roomand/or the Operation Control Centre. A silencing switch shall be provided to silence theaudible alarm but it shall not cancel the visual alarm.

(g) Where an existing entrance of an underground station is integrated into a proposedbuilding and does not comply with the above requirements, the following shall becomplied with :

(i) A new entrance having an exit capacity not less than the existing entrance shallbe provided to comply with the requirements above;

(ii) The means of escape via the new station entrance shall comply with the relevantrequirements of the Standard for Fire Safety in Rapid Transit Systems;

(iii) The existing entrance becomes a link to a proposed building and shall complywith the requirements of Table 12.4.4.1(b); and

(iv) Where the new entrance also replaces the existing entrance as the source of freshair intake for the stations smoke control system, the new entrance shall beprovided with the same provisions as for the existing entrance to ensure theproper operation of the stations smoke control system.


Table 12.4.4.1(b) Building Linked to a Station

Fire Safety RequirementsB

uild

ing

Link

ed to

a S

tatio

n

(a) The link shall not be used as a means of escape.

(b) The proposed building shall be separated from the station by fire-rated shutter having atleast 2 hours fire resistance.

(c) The fire-rated shutter shall be held at the open position normally and shall be operatedby smoke detectors installed at either side of the fire-rated shutter.

(d) The fire-rated shutter after closing by the activation of the smoke detectors shall remainclosed and be rendered inoperative until the control system which the smoke detectorsare connected to is manually reset.

(e) An alarm signal from the fire-shutter control panel (on the closing of the shutters) shallbe transmitted to the station's Supervisory Control System. Upon receiving the alarmsignal, an audible and visual alarm shall be activated at the Station Control Roomand/or the Operation Control Centre. A silencing switch shall be provided to silence theaudible alarm but it shall not cancel the visual alarm.

Table 12.4.4.1(c) Building Interfaced with Firemens &

Emergency Exit Staircases and Breeching Inlets & Firemens Intercom

Fire Safety Requirements

Fire

men

s &

Em

erge

ncy

Exi

t Sta

ircas

es

(a) The staircase shall discharge directly, or via a new exit passageway, to the external. Thewidth of the new exit passageway shall not be less than the width of the staircase.

(b) All fire safety provisions in the staircase shall be extended to the new exit passageway.

(c) The staircase and the new exit passageway (where provided) shall be compartmentedfrom the proposed building with masonry structure having at least 2 hours fire resistance.

(d) The entrance to the firemens staircase shall be visible from the fire engine accessway andshall be located within 18 m of the fire engine accessway.

(e) There shall be no unprotected openings within 3 m of the staircase entrance.

Bre

echi

ng In

lets

&Fi

rem

ens

Inte

rcom

Where a breeching inlet or a firemens intercom is interfaced with the proposed building,the breeching inlet or firemens intercom shall be visible from the fire engine accessway andshall be located within 18 m of the fire engine accessway.


Table 12.4.4.1(d) Building Interfaced with Ventilation Shaft

Fire Safety RequirementsV

entil

atio

n Sh

aft*

(a) The ventilation shaft shall be separated from the proposed building with masonry structurehaving at least 2 hours fire resistance.

(b) Building works including any fire safety works to be carried out within the boundary of therapid transit systems shall comply with the relevant requirements of the Standard for FireSafety in Rapid Transit Systems.

(c) Design of the building shall protect the development from hot smoke emitting from thevent shaft at high velocity under smoke extraction scenario when there is a fire in the rapidtransit systems structure.

* Other requirement:

Space around the vent shaft shall be designed such that exhaust air or smoke (in the event of fire) will not be drawninto the intake vent shaft. The design shall be subjected to the approval of the relevant authority.

12.4.4.2 Flood Protection Requirements

(a) The flood threshold level for allentrances or openings of theproposed underground structuresshall comply with the requirementsof the Drainage Department;

(b) Openings and services penetrationsbelow the flood threshold levelshould be permanently sealed andmade watertight;

(c) During the construction stage, theexisting station wall shall not bepunctured unless the constructionof the integrated structure and theadjoining development has reacheda level at or above the approvedthreshold level; and

(d) Discharge pipes shall be providedwith a swan neck connection toprevent any back flow of water intothe proposed underground stru-ctures integrating with the existingstation. The invert level of the pipeat the swan neck location shall notbe lower than the flood thresholdlevel.

12.4.4.3 Waterproofing Requirements

(a) The interface between the proposedbuilding and the existing under-ground station shall be providedwith a waterproofing system whichis able to :

(i) withstand the calculated hydr-ostatic pressure and differentialmovements between the conn-ecting structures; and

(ii) provide at least two levels of def-ence against water ingress at everyinterface. For example, the jointbetween the proposed and theexisting station walls shall besealed using a hydrophilic rubber(or an equivalent mean) and awaterproofing membrane system.

(b) A membrane waterproofing systemshall have at least two layers ofmembrane bonded with a bitu-minous based system to the concretestructure after application of anappropriate primer. Membranesshall be of sufficient thickness andprovided with add-itional protectivelayers as necessary to ensure that nodamage occurs.

(c) The waterproofing system shallhave at least a ten-year warrantyperiod. The developer shall beresponsible for the maintenance andreplacement of the waterproofingsystem at the interface.

(d) The link structure of the deve-lopment shall be screeded to fall anddrain off within the development.


SECTION 13

DEVELOPMENT PROPOSAL WITHIN RAILWAY CORRIDOR

13.1 General

13.1.1 This section stipulates the proceduresand requirements for obtaining approvalfor a development proposal within therailway corridor.

13.1.2 Plan for development works within therailway corridor shall be submitted to theAuthority for approval in accordancewith Regulation 4.

13.2 Application for Approval ofDevelopment Proposal

13.2.1 An application for the approval ofdevelopment proposal shall beaccompanied by one set of the followingitems :

(a) Plan for development works; and

(b) Engineering evaluation reportaccompanied by plan for engin-eering works.

13.3 Information To Be Indicated On Planfor Development Works

13.3.1 Plan for development works shall beprepared in accordance with therequirements of the Regulations.

13.3.2 The first sheet of the plan shall bear thestandard declarations as given below :

13.3.3 The qualified person shall sign on everysheet of the plans and be responsible forthe accuracy of the details indicated. Theowner/ developer shall also sign on theseplans.



(a) Scale of plans;

(b) Location and clearances of theproposed development works inrelation to the railway area; and

(c) Basement line (if any).



(b) Platform levels of the proposeddevelopment works; and

(c) Minimum clearance betweenproposed development works andthe railway area.

13.4 Approval of Development Proposal

13.4.1 The Authority will approve thedevelopment proposal in writing if thefollowing requirements are compliedwith :

(a) Qualified person has complied withthe requirements of Clauses 13.2and 13.3 hereof and that all itemssubmitted are found to be order; and

(b) Qualified person has fullydemonstrated and confirmed that itis feasible for the developmentworks to fully meet the technicalrequirements of Section 16.

I, _______________________, NRICno/ Passport no, ________________,being the qualified person appointedunder Regulation 5(3) of the RapidTransit Systems (Development andBuilding Works in Railway Corridorand Railway Protection Zone)Regulations, hereby certify that thedevelopment or building works withinthe railway corridor as shown on theseplans have been designed inaccordance with the Code of Practicefor Railway Protection and any otherconditions that the Land TransportAuthority may impose.



13.5.1 In accordance with Regulation 5,amendment plan shall be submitted to theAuthority for approval if any developmentworks depart or deviate from the approvedplan.

13.5.2 No person shall carry out anydevelopment works in departure ordeviation from the approved plan unlessthe amendment plan has been approved.


SECTION 14

BUILDING PROPOSAL WITHIN RAILWAY CORRIDOR

14.1 General

14.1.1 This section stipulates the proceduresand requirements for obtaining approvalfor a building proposal within therailway corridor.

14.1.2 Plan for building works within therailway corridor shall be submitted to theAuthority for approval in accordancewith Regulation 4.

14.2 Application for Approval of BuildingProposal

14.2.1 An application for the approval ofbuilding proposal shall be accompanied byone set of the following items :

(a) Plan for building works; and

(b) Engineering evaluation report ac-companied by plan for engineeringworks.

14.3 Information To Be Indicated On Planfor Building Works

14.3.1 Plan for building works shall be preparedin accordance with the requirements of theRegulations.

14.3.2 The first sheet of the plan shall bear therelevant standard declarations as given inClause 13.3.2.

14.3.3 The qualified person shall sign on everysheet of the plans and be responsible forthe accuracy of the details indicated.





(c) Location and clearances of thebuilding works in relation to therailway area and railway corridor;

(d) Basement outline (if any); and

(e) Main roads including speciallandmarks.




(c) Horizontal and vertical clear distancesbetween the railway area and theproposed development; and

(d) Depth of basement (if any).

14.4 Approval of Building Proposal

14.4.1 The Authority will grant approval for thebuilding proposal in writing if thefollowing requirements are compliedwith :

(a) Qualified person has complied withthe requirements of Clauses 14.2and 14.3 hereof and that all itemssubmitted are found to be in order;and

(b) The building and engineering workslayout fully satisfy the technicalrequirements of Section 16.


14.5.1 In accordance with Regulation 5,amendment plan shall be submitted to theAuthority for approval if any buildingworks depart or deviate from the approvedplan.

14.5.2 No person shall carry out any buildingworks in departure or deviation from theapproved plan unless the amendment planhas been approved.


SECTION 15

ENGINEERING WORKS WITHIN RAILWAY CORRIDOR

15.1 General

15.1.1 This section stipulates the proceduresand requirements for obtaining a permitto commence engineering works withinthe railway corridor.

15.1.2 In accordance with Regulation 6, anapplication for a permit to commenceany works for which the plans have beenapproved under Regulation 4 or 5 shallbe made.

15.2 Application for Permit

15.2.1 An application for permit to commence aspecific phase of engineering workswithin the railway corridor shall beaccompanied by one set of the followingitems :

(a) Plan for engineering works;

(b) Engineering evaluation report;

(c) Construction schedule for theproposed development; and

(c) Relevant documents indicatingplanning approval from thecompetent authority.

15.3 Plan for Engineering Works

15.3.1 Plan for engineering works shall beprepared in accordance with therequirements of the Regulations andendorsed by a qualified person.

15.3.2 Layout plans and cross sectional detailsshall indicate the following items :


(b) Building and boundary lines ofbuilding; and

(c) Vertical and horizontal distances ofthe engineering works in relation tothe railway area.

15.4 Engineering Evaluation Report

15.4.1 Engineering evaluation report shall beprepared and endorsed by a qualifiedperson.

15.4.2 The evaluation report shall include anassessment of the likely effects of theconstruction and operation of the proposedrapid transit systems on the proposeddevelopment.

15.4.3 The report must clearly demonstrate thatthe design of the proposal has taken intoconsideration the effects due to theconstruction and operation of the proposedrapid transit systems.

15.4.4 Notwithstanding the above, the Authorityreserves the right to specify any otherrequirements on the engineeringevaluation report which are deemednecessary for the safeguarding of theproposed rapid transit systems.

15.5 Commencement of Work

15.5.1 The Authority will issue the permit tocommence works in writing if thefollowing requirements are compliedwith :

(a) Qualified person has complied withthe requirements of Clauses 15.2,15.3 and 15.4 hereof and that allitems submitted are found to be inorder; and

(b) Qualified person has fully demon-strated that the proposal satisfies thetechnical requirements of Section16.

15.5.2 Clearance from the Development &Building Control Department of theAuthority shall be obtained before thecommencement of construction worksincluding soil investigation andfoundation works on site.


15.6.1 In accordance with Regulation 5,amendment plan shall be submitted to theAuthority for approval if any building


works depart or deviate from the approvedplan.

15.6.2 No person shall carry out any buildingworks in departure or deviation from theapproved plan unless the amendment planhas been a

LTA@Code Practice for Railway Protection, 2000

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Transcript of LTA@Code Practice for Railway Protection, 2000