Technical specifications

Scope of works:

  • Twin-tube road tunnel under the River Thames, 2 x 1,400 m long,
  • internal diameter 10.66 m, external diameter 11.45 m
  • Access ramps, 600 m in length
  • 8 cross-passages
  • Service buildings at both tunnel portals
  • 1 new footbridge
  • 1 new overbridge for the southbound carriageway of the Blackwall Tunnel

Construction method:

  • TBM tunnelling using an EPB TBM, 2 x 1,120 m
  • TBM diameter 11.8 m,
  • Twith steel fibre reinforced segmental lining,
  • Construction of cross-passages using ground freezing and sprayed concrete lining including rebar reinforded concrete secondary lining, 300 m cut and cover tunnel

Geology

  • London Clay, dense sands of the Lambeth Group, dense gravels of the Harwich Formation, River Terrace Deposits

General data

Project
Silvertown Tunnel, London, United Kingdom

Client
Transport for London (TfL), London, United Kingdom

Contractor
Wayss & Freytag Ingenieurbau AG in a Joint Venture

Construction period
2019 to 2025

Construction costs
GBP 945 million

Utilisation
WInfrastructure
Type
Road tunnel
Length
2,800 m
Construction Method
Tunnelling using an EPB TBM
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