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