Technical data
Project description
- Double-tube road tunnel under the Thames
- Length: 2 x 1,400 m
- Inner diameter: 10.66 m
- Outer diameter: 11.46 m
- Access ramps, length: 600 m
- 8 cross-passages
- Operations building at both tunnel portals
- 1 new pedestrian bridge
- 1 new flyover over the southbound carriageway of the Blackwall Tunnel
Construction method
- TBM tunnelling with EPB shield, 2 x 1,120 m, shield diameter: 11.80 m
- Tunnel lining with steel fibre-reinforced segments
- Construction of the cross-passages using the freezing method and shotcrete construction method as well as with reinforced concrete inner lining
- 300 m of tunnelling using the cut-and-cover method
Geology
- London clay
- Dense sands of the Lambeth Group
- Dense gravels of the Harwich Formation
- River terrace deposits
General data
Project
Silvertown Tunnel, London, Great Britain
Client
Transport for London (TfL), London, Great Britain
Contractor
Wayss & Freytag Ingenieurbau AG in joint venture
Construction period
2019 to 2025
Net construction sum
945 million GBP
Relief and sustainability
The Silvertown Tunnel project involves the construction of a 1.4 kilometre road tunnel under the River Thames, linking Silvertown with North Greenwich Peninsula.
It is the first road tunnel in London to offer specially designed bus lanes for double-decker buses, significantly improving public transport connections in this fast-growing part of east London.
The concept envisages that around 37 zero-emission buses will be able to pass through the tunnel every hour, reducing journey times by up to 20 minutes. With its focus on sustainable mobility, the project will help to relieve congestion in the busy Blackwall Tunnel and make an important contribution to improving air quality in the entire region.
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