Microtunnelling at Main Road, Sidcup FWFAS. M131

Client
Thames Water Utilities

Project
Upsizing of sewerage network to reduce flooding.

Description

microtunnelling and guided auger boring

The Main Road area of Sidcup, London suffered from periodic flooding due to the size of the existing sewers, Thames Water Utilities Ltd commissioned a scheme that involved upsizing of the sewerage network to alleviate this problem. The Main Contractor, Dean and Dyball undertook the opencut works and appointed A E Yates Trenchless Solutions Ltd to undertake the following specialist works:

  • 2No sheeted drive pits for backacter and guided auger.
  • 1No 4.0m ID x 6m deep caisson reception pit.
  • 2No 300mm id guided auger crossings - 58m + 10m.
  • 2No curved 1800mm id pipe jacked backactor drives - 100m each from a central drive pit.

Ground Conditions

Predominantly firm clay with occasional silt and sand lenses.

Study Project Date  
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Microtunnelling at Millharbour Sewer Diversion. M142 28/02/2009
Microtunnelling at CHP Pipeline Tunnels and Shafts. M133 31/07/2008
Microtunnelling at Main Road, Sidcup FWFAS. M131 31/03/2008
Microtunnelling at Pannal to Asselby 1220 Gas Pipeline - RLX's. M128 31/10/2007
Microtunnelling at Locks Lane, Purton - RLX. M115 31/12/2006

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