| SP Power Assets NS 2 Transmission Cable Tunnel (Singapore Power) |
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LTA C485 / LTA C486 Marina Coastal Expressway (MCE) |
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PUB Woodlands T2119A Sewer Diversion Works |
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Singapore Power Company, SP transmission cable tunnel – SK Engineering & Construction NS 2 Project / Ang Mo Kio Shaft (AMK).
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Penta – Ocean Construction Co. Ltd. 420m twin 5 lane road tunnels that passes under the Marina bay seabed. 2013
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Ley Choon Group Holdings Limited.The weak formation between two adjacent shafts 3 meters apart, washed out and resulted in flooding...
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SP Power Assets NS 2 Transmission Cable Tunnel (Singapore Power)
  
Singapore Power Company, SP transmission cable tunnel – SK Engineering & Construction NS 2 Project / Ang Mo Kio Shaft (AMK).
Sovereign pre-grouted toe of slurry wall and open formation interphase - to shaft floor level, prior to excavation - sealed 30L/min inflow. Using the Sovereign Proprietary Grouting System including specialist pumping equipment the 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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LTA C485 / LTA C486 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 included the dual 5 lane underground road expressway which encompasses a 420M section that crosses under the Marina Bay seabed. Sovereign sealed all bored piles, construction joints, cracks and other subsea penetrations that caused flooding during construction. Water sealing work using Sovereign's NOH2O® grout took only 4 months to complete.
 
Singapore LTA (The Land Transport Authority) C486 Project – Samsung C&T Corporation – 3,6KM Dual 5 lane underground road tunnels - Marina Coastal Expressway.
Sovereign 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 was completed in 3 months using Sovereign's Proprietary NOH2O® grout and specialty pumping equipment.
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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 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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