Jurong Rock Caverns - sprojm.org.sg

1 JurongRock Caverns9 November 2017 TeoTiong YongJTC Corporation2 Presentation of JurongRock Caverns (JRC) Development of JRC Project Details and Implementation Project Specifics Planning Project Management How it was constructed Challenges JRC Facilities and Operations Video Presentation3 JRC is located below the seabed at Banyan Basin, JurongIslandBanyan BasinJurong IslandStorage in aboveground tanksStorage in underground rock caverns60 Ha of surface land freed upAboveground land used for production; underground land used for storage Saving surface land Improved security Improved health & safetyUnderground Rock Caverns for Oil StorageJurong Rock Caverns JourneySite InvestigationAccess Shaft ConstructionTunnel Excavation52006: Funding approval obtained for Phase 1 development2007: Started construction of access shafts2009: Started construction of main caverns2Q 2014: Completion of 1sttwo Caverns to serve JAC2Q 2016.

2 Completion of Jurong Rock CavernsEngineering Design of Access ShaftsFeasibility & Business Studies, Soil Investigation and Funding Approval20062007200920012Q20142016 Construction of Main CavernsConstruction of Access Shafts & Engineering Design of Main Caverns Completed CavernLayout Plan of Phase 1 Water Curtain GalleryCavernOperations TunnelsAccess TunnelsAccess Shaft 3 Access Shaft 1 Cross Section of Shafts, Tunnels & Caverns7827m20m 9 storeyshigh (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 Gallery9 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 automaticallyHow Does the Underground Oil Storage Work?

3 Typical Water Curtain Gallery Arrangement10 How deep is Jurong Rock Caverns ?10m20m30m40m50m60m70m80m90m100m1 10m120m130m140m150mJurongRock CavernsMRT SystemSingapore Power Cable TunnelDeep Tunnel Sewerage SystemUnderground Expressways, Underpasses & Shopping Malls12 Planning Project Implementation strategy -DDB ?/ PM Consultant ? Early Engagement of Authorities Advance works -Soil Investigations/ Environmental Impact Study/ QuantitiveRisk Assessment Insurance procurement Construction Contract Strategy shared risk concept Handling of Explosives on JurongIslandTechnical Challenges: Use of Explosives13 Explosives Storage Houses (ESH) were constructed to have 24hours/ 7days access to explosives for excavation works to improve construction productivityProject Management14 Project Management (Communications)15 Project ManagementJTC Stakeholder Meetings (Internal)Project Meetings (External)

4 JRC Owner Meetings SnrManagement UpdatesQualitative & Quantitative Risk Management Meetings GK-JCPL Risk Meeting HDEC Risk MeetingTime Schedule Meetings Critical Path MeetingIntegration Meetings Construction Meeting Design Meeting Specialist Technical MeetingsQuality Management Meetings QA/QC Meetings Inspection MeetingsOperation Meetings Pre-commissioning meeting Maintainability meetingConstruction of Access Skin Wall by othersDIAPHGRAM WALLt= RING RING BEAMACD-48mACD mACD >161006050100100684896189455439254318415 18156 III1043190286044130100877710069521007454 100959310010093 IIIIV10 IIIV>16 IIIII13 IIIII12 IIIII>16 IIIII>16 IIIII>16 IIIII>16II>16 III5 IIIII10II III11I5I2100100100I<11009585 III100100100I<1I010097781009686100100100 1008760100969610010010010010010010010098 100888810010095100100100100100100I4I5I1I 8I4I0I0I1to2I<1I0I<1II2 RECLAIMEDSANDFINE TOCOARSE SANDCLAYEYSILT(JURONGFORMATION)SILTSTONE ANDSANDSTONE(JURONGFORMATION)

5 < 35 Section = ACD + Ground Level =ACD + & FIm%BLOWS/30 CMSCR%RQD% mACD-55mCL 34CL 33CL 32CL 31CL 30CL 29CL 28CL 27CL 26CL 25CL 24CL 23CL 22CL 21CL 20CL 19CL 18CL 25CL 24CL 23CL 22CL 21CL 20CL 19CL 18CL 17CL 16CL 15CL 14CL 13CL 12CL 11CL 10CL 9CL 8CL 7CL 6CL 5CL 4CL 3CL 2CL 1 Section ESection FCL 1CL 2CL 3CL 4CL 5CL 6CL 7CL 8CL 9CL 10CL 11CL 12CL 13CL 14CL 15CL 16CL 17CL 18CL 19CL 20CL 21CL 22CL 23CL 24CL 25CL 18CL 19CL 20CL 21CL 22CL 23CL 24CL 25CL 26CL 27CL 28CL 29CL 30CL 31CL 32CL 33CL 34CL 3532m131mTypical Cross SectionConcrete LiningShotcrete and Rock BoltsAccess Shafts Contractor: Sato KogyoDiaphragm Wall with Ring BeamsConstruction of Access Shafts, Tunnels and CavernsAccess Shaft 1 Caverns Contractor: Hyundai Engineering and ConstructionAccess Shaft 3 Construction Methodology of Access Shafts, Tunnels and CavernsDetailed Design and Construction Venturing so deep underground in sedimentary rock is breaking new ground.

6 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 conditionsTechnical Challenges : Geological & Hydrogeological RisksStatus of JRC Project22 Caverns1and2 ConstructionofcavernscompletedinAug2013 Constructionofsupportingfacilitiescomple tedinMar2014 TestingandcommissioningfromApr2014 StartedoperationsforJurongAromaticsCorpo rationon1 Jul2014 Caverns3,4and5 ConstructionofcavernscompletedinJun2014 Constructionofsupportingfacilitiescomple tedin1H2017 Testing&CommissioningandReadyforOperatio nsinend2017 ASEAN Outstanding Engineering Achievement Awards 2015 IES Prestigious Engineering Awards 2015SG Mark Platinum 2015 SPMI Project of the Year Award 2015 -2016 (Engineering & Construction)

7 SingaporeStructuralAwards2014 CommendationAwardforIndustrialStructures TOP 50 Engineering Feats @ IES-SG50 (2016)Innovative Use of Underground SpaceTHANK YOU