JURONG ROCK CAVERNS. Workshop on the Optimisation of Shaft Design 4 June 2013

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1 JURONG ROCK CAVERNS Development of Underground Rock Caverns for Hydrocarbon Storage on Jurong sland Workshop on the Optimisation of Shaft Design 4 June 2013

2 The Flow Journey of Jurong Rock Caverns Access Shaft Project Details JRC Video

3 JRC is located below the sea-bed at Banyan Basin, Jurong sland Jurong sland Banyan Basin

4 Benefits Underground Rock Caverns for Oil Storage Above-ground land used for production; underground land used for storage Storage in aboveground tanks 60 Ha of Surface land freed up for petroleum & chemical industry Saving surface land Creating a competitive advantage mproved security mproved health & safety Storage in underground rock caverns

5 Overall Development of JRC 3.2 ha AS3 JURONG SLAND AS1 Phase 1 & 2 = 30 Ha Multi-purpose Product Jetty Ph Cavern Notation Product Cavern Storage Volume (m 3 ) 1 C1-1 Liquid 1 x 150,000 1 C1-2 to C1-5 Liquid 4 x 330,000 2 C2-1 to C2-4 Liquid 4 x 165,000 2 C2-5 to C2-6 Liquid 2 x 330,000 Total Storage Volume (m 3 ) 2,790,000 5

6 Storage Caverns are 150m deep under Banyan Basin

7 PHASE 1 JRC CONTRACTS Access Shaft Start Up Tunnel Start Up Tunnel

8 DESGN & CONSTRUCTON OF ACCESS SHAFTS AND START-UP TUNNELS Basic Engineering Design Consultant - Geostock Design and Build Contractor - Sato Kogyo Contract completed in Sept 09

9 View from the Top

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11 131m 32m 2m 3.72m 4m 4m 28m 4m 4m 4.7m DEPTH N-VALUE BLOWS/30CM TCR SCR RQD WG & F F 23.9m 21.5m m % % % 41 CLAYEY SLT (JURONG (Residual 46 Jurong FORMATON) 100/ V V V < < < to < <1 RECLAMED SAND Reclaimed Sand FNE TO COARSE SAND Fine to Coarse Sand Clayey Silt Formation) EXTG. Ground Level RL = RL = ACD +5.0m ACD m 400mm Skin Wall by others 20.55m CL 33 CL 33 CL 33 CL 33 CL 34 CL 34 CL 34 CL 34 ACD-55m CL 35 CL 35 CL 35 CL 35 SLTSTONE AND SANDSTONE (JURONG 10.7m 10.7m FORMATON) 18.3m 34.4m ACD m Section D DAPHGRAM WALL t=1.0m ACD-21m ACD-23m Section E ACD-48m CL 1 CL CL 2 CL CL 3 CL CL 4 CL CL 5 CL CL 6 CL CL 7 CL CL 8 CL CL 9 CL CL 10 CL 10 CL 11 CL 11 CL 12 CL 12 CL 13 CL 13 CL 14 CL 14 CL 15 CL 15 CL 16 CL 16 CL 17 CL 17 CL 18 CL 18 CL 19 CL 19 CL 20 CL 20 CL 21 CL 21 CL 22 CL 22 CL 23 CL 23 CL 24 CL 24 CL 25 CL 25 CL 26 CL 26 CL 27 CL 27 CL 28 CL 28 CL 29 CL 29 CL 30 CL 30 CL 31 CL 31 CL 32 CL 32 CL 1 CL CL 2 CL CL 3 CL CL 4 CL CL 5 CL CL 6 CL CL 7 CL CL 8 CL CL 9 CL CL 10 CL 10 CL 11 CL 11 CL 12 CL 12 CL 13 CL 13 CL 14 CL 14 CL 15 CL 15 CL 16 CL 16 CL 17 CL 17 CL 18 CL 18 CL 19 CL 19 CL 20 CL 20 CL 21 CL 21 CL 22 CL 22 CL 23 CL 23 CL 24 CL 24 CL 25 CL 25 CL 26 CL 26 CL 27 CL 27 CL 28 CL 28 CL 29 CL 29 CL 30 CL 30 CL 31 CL 31 CL 32 CL 32 CAPPNG BEAM RC RNG BEAM 1.0mx1.0m RC RNG BEAM 1.0mx1.5m ACD m ACD m 9400 Diaphragm Wall Typical Technical Measurements 1m thick Diaphragm sand interface 1m x 1.5m Ring 4m c/c Section F Typical Cross Section

12 Construction of diaphragm wall

13 Capping Beam Construction

14 Diaphragm Wall & Ring Beam Construction

15 Diaphragm Wall & Ring Beams

16 Shaft Sinking and Mucking out of Soil / Rock

17 DEPTH N-VALUE BLOWS/30CM TCR SCR RQD WG & F F 4.7m 3.72m 4m 4m 4m 4m m 4m 4m 4m 4m 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 26 CL CL 1 CL 27 CL CL 2 28 CL 3 CL CL 29 CL 4 CL CL 30 CL 5 CL CL 31 CL 6 CL CL 32 CL 7 CL 33 CL 8 CL 34 CL 9 CL 35 CL CL 10 CL 10 CL CL CL 12 CL 12 CL 13 CL 13 CL 14 CL 14 CL 15 CL 15 CL 16 CL 16 CL 17 CL 17 CL 18 CL 18 CL 19 CL 19 CL 20 CL 20 CL 21 CL 21 CL 22 CL 22 CL 23 CL 23 CL 24 CL 24 CL 25 CL 25 CL 26 CL 26 CL 27 CL 27 CL 28 CL 28 CL 29 CL 29 CL 30 CL 30 CL 31 CL 31 CL 32 CL 32 CL 33 CL 33 CL 34 CL 34 CL 35 CL 35 CL 35 CL 9 CL CL 35 CL 35 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 26 CL CL 1 27 CL 2 28 CL 3 CL 29 CL 4 CL 30 CL 5 CL CL 31 CL 6 CL CL 32 CL 7 CL 33 CL 8 CL CL 10 CL 10 CL CL CL 12 CL 12 CL 13 CL 13 CL 14 CL 14 CL 15 CL 15 CL 16 CL 16 CL 17 CL 17 CL 18 CL 18 CL 19 CL 19 CL 20 CL 20 CL 21 CL 21 CL 22 CL 22 CL 23 CL 23 CL 24 CL 24 CL 25 CL 25 CL 26 CL 26 CL 27 CL 27 CL 28 CL 28 CL 29 CL 29 CL 30 CL 30 CL 31 CL 31 CL 32 CL 32 CL 33 CL 33 2m 2m 28m 32m 28m 32m 131m 131m m 21.5m 100/ EXTG. Ground Level RL = RL = ACD +5.0m m % % % ACD m ACD-21m V RECLAMED ACD-23m SAND Reclaimed Sand V Section D 400mm Skin Wall by others V FNE TO COARSE SAND DAPHGRAM WALL Section E Fine to 15Coarse t=1.0m Sand CLAYEY Clayey Silt SLT (JURONG (Residual FORMATON) Jurong / Formation) m V ACD-21m ACD-48m ACD-23m V V CL ACD-55m Section E SLTSTONE AND Siltstone and <1 SANDSTONE 10.7m 10.7m (JURONG Sandstone FORMATON) <1 (Jurong 18.3m Formation) < m ACD-48m CL CL 34 ACD-55m m SLTSTONE AND <1 SANDSTONE ACD m 10.7m 10.7m (JURONG to2 FORMATON) < <1 18.3m < < m Section F ACD m to < <1 FNE TO COARSE SAND CLAYEY SLT (JURONG FORMATON) Section D DAPHGRAM WALL t=1.0m 400mm Skin Wall by others RC RNG BEAM 1.0mx1.0m RC RNG BEAM 1.0mx1.5m CAPPNG BEAM ACD m RC RNG BEAM 1.0mx1.0m RC RNG BEAM 1.0mx1.5m ACD m ACD m ACD m ACD m Diaphragm Wall Concrete Lining Typical Technical Measurements 1m high SFRC concrete linings 0.85m -1.4m thick Section F Typical Cross Section ACD m

18 Concrete Lining

19 Continue Shaft Excavation & Shaft Sinking

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21 Grouting

22 Post Grouting

23 DEPTH N-VALUE BLOWS/30CM TCR SCR RQD WG & F F 4.7m 3.72m 4m 4m 4m 4m CL 1 CL CL 2 CL CL 3 CL CL 4 CL CL 5 CL CL 6 CL CL 7 CL CL 8 CL CL 9 CL CL 10 CL 10 CL 11 CL 11 CL 12 CL 12 CL 13 CL 13 CL 14 CL 14 CL 15 CL 15 CL 16 CL 16 CL 17 CL 17 CL 18 CL 18 CL 19 CL 19 CL 20 CL 20 CL 21 CL 21 CL 22 CL 22 CL 23 CL 23 CL 24 CL 24 CL 25 CL 25 CL 26 CL 26 CL 27 CL 27 CL 28 CL 28 CL 29 CL 29 CL 30 CL 30 CL 31 CL 31 CL 32 CL 32 CL 33 CL 33 CL 34 CL 34 CL 35 CL 35 CL 35 CL 35 CL 1 CL CL 2 CL CL 3 CL CL 4 CL CL 5 CL CL 6 CL CL 7 CL CL 8 CL CL 9 CL CL 10 CL 10 CL 11 CL 11 CL 12 CL 12 CL 13 CL 13 CL 14 CL 14 CL 15 CL 15 CL 16 CL 16 CL 17 CL 17 CL 18 CL 18 CL 19 CL 19 CL 20 CL 20 CL 21 CL 21 CL 22 CL 22 CL 23 CL 23 CL 24 CL 24 CL 25 CL 25 CL 26 CL 26 CL 27 CL 27 CL 28 CL 28 CL 29 CL 29 CL 30 CL 30 CL 31 CL 31 CL 32 CL 32 CL 33 CL 33 2m 28m 32m 131m 23.9m 21.5m Typical Technical Measurements m % % % RECLAMED SAND Reclaimed Sand FNE TO -9.0 COARSE SAND Fine 9 to Coarse Sand Clayey Silt 41 CLAYEY SLT (JURONG FORMATON) (Residual Jurong 100/ Formation) V V V Siltstone and Sandstone (Jurong Formation) SLTSTONE 2 AND <1 SANDSTONE (JURONG FORMATON) < <1 EXTG. Ground Level RL = RL = ACD +5.0m ACD m Section D DAPHGRAM WALL t=1.0m ACD-21m ACD-23m Section E ACD-48m 400mm Skin Wall by others 20.55m CL 34 ACD-55m CL m 10.7m 18.3m CAPPNG BEAM RC RNG BEAM 1.0mx1.0m RC RNG BEAM 1.0mx1.5m Q-System Rock bolts 4 6m Shotcrete mm Siltstone and Sandstone (Jurong Formation) to < <1 ACD m 34.4m 9400 ACD m ACD m Shotcrete & Rockbolts Section F ACD m Typical Cross Section

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25 Excavation using Drill & Blast Cycle

26 Drilling Charging Blasting Surveying Rock Bolting Tunnel Cycle Ventilation Mucking Out Shotcreting Scaling

27 Tunnelling equipment / drilling of charging holes

28 Blasting Preparations

29 Specialised Tunnelling Equipment

30 Rock Mapping

31 Shotcreting

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33 JTC N BREF

34 Start up tunnels

35 JTC N BREF

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37 Thank You