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  Ground Conditions and Solutions for Interface Tunnel with Pump Station Shaft

  The Deep Tunnel Storm Water System project forms part of Dubai’s vision for a smart and sustainable city. The project aims to collect, store and convey groundwater and storm-water runoff from almost 500 km2 of Dubai’s urban area. The captured water will flow through a 10.3 km long tunnel of 10m internal diameter that is 45m deep with various intake shafts along the tunnel alignment. A terminal pumping station located on reclaimed land at the end of the tunnel will allow the water to be pumped out to sea at 36m3/s or overflow nearshore at 110m3/s. The terminal umping station located on reclaimed land is amongst the most compact facility for the 110m3/s of flow management whilst the tunnel-boring machine is amongst the largest such machine utilised in the region. This paper focuses on the challenges, and execution of the interfacing between the contracts for the terminal pumping station and the tunnel boring machine bored tunnel contracts.

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