Jurong Rock Caverns9 November 2017
Teo Tiong YongJTC Corporation
2
Presentation of Jurong Rock Caverns (JRC)
Development of JRC
Project Details and Implementation
Project Specifics
Planning
Project Management
How it was constructed
Challenges
JRC Facilities and Operations
Video Presentation
3
JRC is located below the seabed at Banyan Basin, Jurong Island
Banyan
Basin
Jurong
Island
Storage in
aboveground
tanks
Storage in
underground
rock caverns
60 Ha of surface
land freed up
Aboveground land used for production; underground land used for storage
• Saving surface land
• Improved security
• Improved health & safety
Underground Rock Caverns for Oil Storage
Jurong Rock Caverns Journey
Site Investigation Access Shaft Construction Tunnel Excavation
5
2006: Funding approval obtained
for Phase 1 development
2007: Started construction
of access shafts
2009: Started construction
of main caverns
2Q 2014: Completion of 1st
two
caverns to serve JAC
2Q 2016: Completion of
Jurong Rock Caverns
Engineering Design of
Access Shafts
Feasibility & Business Studies, Soil Investigation
and Funding Approval
2006 2007 20092001 2Q2014 2016
Construction of Main Caverns
Construction of Access Shafts & Engineering
Design of Main Caverns
Completed Cavern
Layout Plan of Phase 1
Water
Curtain
Gallery
Cavern Operations
Tunnels
Access
Tunnels
Access
Shaft 3
Access
Shaft 1
Cross Section of Shafts, Tunnels & Caverns
7
8
27m
20m
• 9 storeys high (27 m)
• Length = 340 m
• Excavation using drill and
blast method with grouting
(if required)
• One cavern = 2 storage
galleries
• Volume per storage gallery
= 165,000m3
(equivalent to 64 Olympic
swimming pools)
Typical Specification of a Cavern Storage Gallery
9
• Our caverns are
unlined
• Caverns roofs are
below groundwater
table
• Water pressure
keeps oil within the
caverns
• Water that seeps in
is collected and
pumped up
automatically
How Does the Underground Oil Storage Work?
Typical Water Curtain Gallery Arrangement
10
How deep is Jurong
Rock Caverns?
10m
20m
30m
40m
50m
60m
70m
80m
90m
100m
110m
120m
130m
140m
150m
JurongRock
Caverns
MRT System
Singapore Power
Cable Tunnel
Deep Tunnel
Sewerage System
Underground
Expressways,
Underpasses &
Shopping Malls
12
Planning
Project Implementation strategy - DDB ?/ PM Consultant ?
Early Engagement of Authorities
Advance works - Soil Investigations/ Environmental Impact
Study/ Quantitive Risk Assessment
Insurance procurement
Construction Contract Strategy – shared risk concept
Handling of Explosives on Jurong Island
Technical Challenges: Use of Explosives
13
Explosives Storage Houses (ESH) were constructed to
have 24hours/ 7days access to explosives for excavation
works to improve construction productivity
Project Management
14
Project Management (Communications)
15
Project Management
JTC Stakeholder Meetings (Internal)
Project Meetings (External)
• JRC Owner Meetings• Snr Management Updates
Qualitative & Quantitative Risk Management Meetings• GK-JCPL Risk Meeting• HDEC Risk Meeting
Time Schedule Meetings• Critical Path Meeting
Integration Meetings• Construction Meeting• Design Meeting• Specialist Technical
Meetings
Quality Management Meetings• QA/QC Meetings• Inspection Meetings
Operation Meetings• Pre-commissioning meeting• Maintainability meeting
Construction of Access Shafts
ACD-21m
ACD-23m 2m
4.7
m
21.5m
23.9m
10.7m 10.7m
400mm Skin Wall
by others
DIAPHGRAM WALLt=1.0m
RC RING BEAM1.0mx1.0m
RC RING BEAM1.0mx1.5m
CAPPING BEAM
ACD-48m
ACD -126.025m
ACD -93.525 m
ACD -86.300 m
18.3m
20.55m
34.4m
9400
46
100/
26
62 18 4III
IV>16
100
60
50
100
100
68
48
96
18
9
45
54
39
25
43
18
4
15
18
15
6
III10
43 19 0
28 6 0
44 13 0
100 87 77
100 69 52
100 74 54
100 95 93
100 100 93
IIIIV
10
III
V
>16
IIIII
13II
III
12II
III>16II
III
>16
II
III>16II
III
>16II
>16III
5IIIII
10
II III
11
I
5
I2
100 100 100I
<1
100 95 85III
100 100 100I
<1
I0
100 97 78
100 96 86
100 100 100
100 87 60
100 96 96
100 100 100
100 100 100
100 100 98
100 88 88
100 100 95
100 100 100
100 100 100
I
4
I
5
I1
I8
I
4
I0I
0
I
1to2
I
<1
I
0I
<1
I
I
2
RECLAIMEDSAND
FINE TO
COARSE SAND
CLAYEY
SILT
(JURONG
FORMATION)
SILTSTONE
ANDSANDSTONE
(JURONG
FORMATION)
28m
100 100 100
-75.5
I
<1100 100 100
100 100 100
4m
4m
4m
4m
3.7
2m
CL 35
Section D
RL103.259 = ACD +5.0mEXTG. Ground Level RL103.300 =
ACD +5.041m
DE
PT
H
N-V
AL
UE
TC
R
WG
& F
I
m %BL
OW
S/3
0C
M
SC
R
%R
QD
%
-1.5
-3.0
-6.0
-9.0
-12.0
-15.0
-18.0
-21.0
-24.4
-27.0
-27.7
-30.7
-33.7
-36.4
-37.6
-39.5
-42.4
-45.4
-48.4
-50.0
-53.0
-54.3
-56.0
-57.5
-60.5
-63.5
-66.5
-69.5
-72.5
-78.5
-81.0
-83.0
-84.5
-86.5
-89.0
-90.5
-93.5
-96.5
-99.5
-102.5
-104.0
-105.5
12
13
6
9
22
41
ACD -86.000 m
ACD-55m CL 34
CL 33
CL 32
CL 31
CL 30
CL 29
CL 28
CL 27
CL 26
CL 25
CL 24
CL 23
CL 22
CL 21
CL 20
CL 19
CL 18
CL 25
CL 24
CL 23
CL 22
CL 21
CL 20
CL 19
CL 18
CL 17
CL 16
CL 15
CL 14
CL 13
CL 12
CL 11
CL 10
CL 9
CL 8
CL 7
CL 6
CL 5
CL 4
CL 3
CL 2
CL 1
Section E
Section F
CL 1
CL 2
CL 3
CL 4
CL 5
CL 6
CL 7
CL 8
CL 9
CL 10
CL 11
CL 12
CL 13
CL 14
CL 15
CL 16
CL 17
CL 18
CL 19
CL 20
CL 21
CL 22
CL 23
CL 24
CL 25
CL 18
CL 19
CL 20
CL 21
CL 22
CL 23
CL 24
CL 25
CL 26
CL 27
CL 28
CL 29
CL 30
CL 31
CL 32
CL 33
CL 34
CL 35
32m
131m
Typical Cross Section
Concrete
Lining
Shotcrete
and
Rock Bolts
Access Shafts
Contractor: Sato Kogyo
Diaphragm
Wall
with Ring
Beams
Construction of Access Shafts, Tunnels and Caverns
Access
Shaft 1
Caverns Contractor: Hyundai Engineering and Construction
Access
Shaft 3
Construction Methodology of Access Shafts, Tunnels and Caverns
Detailed Design and Construction
• Venturing so deep underground in sedimentary rock is breaking new
ground.
• Unpredictable geological conditions.
• Adopting systematic deep investigation boreholes and probe holes.
• Pre-grouting to reduce groundwater seepage.
• Continual probing and site investigation before excavation
• Pre-grouting to reduce groundwater seepage
• Adapt excavation methods to site conditions
Technical Challenges : Geological & Hydrogeological Risks
Status of JRC Project
22
Caverns 1 and 2• Construction of caverns completed in Aug 2013
• Construction of supporting facilities completed in Mar 2014
• Testing and commissioning from Apr 2014
• Started operations for Jurong Aromatics Corporation on 1 Jul 2014
Caverns 3, 4 and 5• Construction of caverns completed in Jun 2014
• Construction of supporting facilities completed in 1H 2017
• Testing & Commissioning and Ready for Operations in end 2017
ASEAN Outstanding
Engineering Achievement
Awards 2015
IES Prestigious
Engineering Awards 2015SG Mark
Platinum 2015
SPMI – Project of the Year
Award 2015 - 2016
(Engineering & Construction)
Singapore Structural Awards 2014
Commendation Award for Industrial Structures
TOP 50 Engineering
Feats @ IES-SG50
(2016)
Innovative Use of
Underground Space
THANK YOU
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