LTA C156 Marina South Extension


  

Samsung C&T Corporation. 1km twin rail tunnels on the North South line including Marina South Pier MRT underground station serving the Marina Bay Cruise centre and passenger terminal. 2013/14

Singapore LTA (The Land Transport Authority) MRT, North South Line extension C156 Project – Samsung C&T Corporation. 1KM twin rail tunnels including Marina Bay underground station (300M long) located 40m from shoreline and 35M deep. Ground water leaked into the entire underground structure which was constructed in reclaimed land – floor, walls and roof. Sovereign-Jeda sealed all D - walls, floor and roof construction joints and cracks with Sovereign's NOH2O grout, prior to handing project over to LTA.
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LTA C486 Marina Coastal Expressway (MCE)


  

Samsung C&T Corporation. 3.6km twin 5 lane underground road tunnels. 2013

Singapore LTA (The Land Transport Authority) C486 Project – Samsung C&T Corporation – 3,6KM Dual 5 lane underground road tunnels - Marina Coastal Expressway. Sovereign-Jeda sealed all leaking bored piles, D – Wall construction joints, cracks and overhead build-in fire tanks, ventilation shafts and emergency access ways – floor, side walls and roof. All water sealing and grouting work were completed in 3 months using Sovereign's NOH2O grout.
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LTA C485 Marina Coastal Expressway (MCE)


  

Penta – Ocean Construction Co. Ltd. 420m twin 5 lane road tunnels that passes under the Marina bay seabed. 2013

Singapore LTA (The Land Transport Authority) C485 Project - Penta-Ocean Construction CO. LTD Japanese group. The Marina development also includes the dual 5 lane underground road expressway which compasses a 420M section that crosses under the Marina Bay seabed. Sovereign-Jeda sealed all bored piles, construction joints, cracks and other subsea penetrations that caused flooding during construction. Grout sealing work using Sovereign's NOH2O grout, took only 4 months to complete.
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LTA C903 Bugis MRT Station


  

Soletanche Bachy – Koh Brothers JV. Construction of the DTL 1 Bugis Station and its associated tunnels to serve the Downtown and Marina Bay area. 2013

Singapore LTA (The Land Transport Authority) MRT Bugis station C903 Project - Soletanche Bachy - Koh Brothers JV. Sovereign-Jeda sealed 128 penetrations in area 5 tunnel: - slurry walls construction joints and cracks as well as floor and roof penetrations. Grouting/watersealing work was completed in 8 shifts.
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SP Power Assets NS 2 Transmission Cable Tunnel (Singapore Power)


    

SK Engineering & Construction. Excavation and construction of Ang Mo Kio Shaft for the North South Transmission Cable Tunnel. 2013/14

Singapore Power Company, SP transmission cable tunnel – SK Engineering & Construction NS 2 Project / Ang Mo Kio Shaft (AMK). Sovereign-Jeda pre-grouted toe of slurry wall and open formation interphase - to shaft floor level, prior to excavation - sealed 30L/min inflow. Grouting work took 28 shifts and during excavation the groundwater inflow was minimal. Shaft sinking activities continued without delays or disruption to the client and owner.
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SP Power Assets EW 2 Transmission Cable Tunnel (Singapore Power)


SK Engineering & Construction. Excavation and construction of Dunearn and Holland Shafts for the East West Transmission Cable Tunnel. 2013/14

  

Singapore Power Company, SP transmission cable tunnel – SK Engineering and Construction EW2 Project / Dunearn and Holland shafts.


Dunearn Pre-Grout

Dunearn shaft were pre-grouted from the surface prior to excavation in order to reduce the permeability of the area between toe and bedrock. 22 surface bores were hammered to 70M and the area between 48 and 70M were grouted – intersection between slurry wall toe and bedrock. On completion permeability tests were done and it was determined that the grouting was done successfully. During excavation minimal inflows were observed and shaft excavation and TBM launce site preparation was undertaken without delays. This pre-grout design lead to the use in other shafts in the area – SK&EC's Tagor Shaft and Penta Ocean's Jurong shaft to mention a few...


Holland remedial grouting

  

Holland shaft were grouted from the interior of the shaft – some from drilling behind D-wall and some from drilling behind shotcrete wall. For the D-wall section backwall grouting was undertaken and behind shotcrete section, formation grouting was undertaken by drilling much deeper seeling the groundwater without the possibility of Hydro fracturing the shotcrete. All remedial work was undertaken using Sovereign NOH2O grout.
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SP Power Assets NS 1 Transmission Cable Tunnel (Singapore Power)


  

Samsung C&T Corporation. Construction of Gambas Shaft for the North South Transmission Cable Tunnel. 2013

Singapore Power Company, SP transmission cable tunnel – Samsung C&T Corporation – NS1 Project / Gambas Shaft. Sealed all the leaks in the 16M dia. x 75M shaft - slurry wall, joints and cracks with Sovereign NOH2O grout.
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PUB Woodlands T2119A Sewer Diversion Works


    

Ley Choon Group Holdings Limited.

The weak formation between two adjacent shafts 3 meters apart, washed out and resulted in flooding of the shaft under development. Dewatering had to stop due to subsidence of the surface as buildings started to crack – both shafts then flooded as a result. Sovereign Jeda were given the order to remedy the situation. An in-shaft Hydrolance injection system, never witnessed in Singapore before, was introduced while a permeation grouting method on the 3 meter formation fillet between both shafts from surface were grouted concurrently. Within 3 shifts a 100% seal was created and the shaft was pumped dry and excavation resumed.
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LTA C156 Marina South Extension LTA C486 Marina Coastal Expressway (MCE) LTA C485 Marina Coastal Expressway (MCE) LTA C903 Bugis MRT Station
Samsung C&T Corporation. 1km twin rail tunnels on the North South line including Marina South Pier MRT underground station serving the Marina Bay Cruise centre and passenger terminal. 2013/14.

Samsung C&T Corporation. 3.6km twin 5 lane underground road tunnels. 2013




Penta – Ocean Construction Co. Ltd. 420m twin 5 lane road tunnels that passes under the Marina bay seabed. 2013



Soletanche Bachy – Koh Brothers JV. Construction of the DTL 1 Bugis Station and its associated tunnels to serve the Downtown and Marina Bay area. 2013


SP Power Assets NS 2 Transmission Cable Tunnel (Singapore Power) SP Power Assets EW 2 Transmission Cable Tunnel (Singapore Power) SP Power Assets NS 1 Transmission Cable Tunnel (Singapore Power) PUB Woodlands T2119A Sewer Diversion Works
SK Engineering & Construction. Excavation and construction of Ang Mo Kio Shaft for the North South Transmission Cable Tunnel. 2013/14


SK Engineering & Construction. Excavation and construction of Dunearn and Holland Shafts for the East West Transmission Cable Tunnel. 2013/14

Samsung C&T Corporation. Construction of Gambas Shaft for the North South Transmission Cable Tunnel. 2013


Ley Choon Group Holdings Limited.The weak formation between two adjacent shafts 3 meters apart, washed out and resulted in flooding...


Sovereign's specialized Grouting services are now also available in Singapore.
Grout projects are managed from our Joint Venture office based in Bukit Merah, Singapore while manufacturing is done in Perth, Western Australia and Kansas City, USA. Grout designs for grout curtains and remedial grouting are constantly developed within the Sovereign Group as well as with international key partners – all with many years of grouting experience in sealing unwanted groundwater inflows in mines and tunnel sites.