Crossrail C305 Eastern Running Tunnels

Owner
Crossrail Ltd. - TfL
Client
Dragados Sisk JV
Cost
£500 million GBP
Timeframe
February 2011 — December 2012
Services performed
Tunnel design, engineering support, geotechnical engineering and site supervision services were provided.
Description
Contract C305 is the biggest design-bid-build construction contract of the Crossrail (CRL) project and includes the eastern running tunnels of CRL's central section with launch shafts and SCL launch adits for TBMs at Limmo Peninsula, SCL caverns and launch adits for TBMs at Stepney Green and 10 SCL cross passages between the running tunnels with lengths up to 30m. At the Limmo Peninsula site a 40m deep and 30m diameter SCL shaft was built. At the shaft bottom in Stepney Green, two 30m long and up to 10m wide SCL launch adits were constructed followed by two 14m high and up to 18m wide, SCL caverns with single sidedrift and double sidedrift cross sections.
Geology
Geological locations of the cross passages vary from London Clay to Lambeth Group and Thanet Sands.
Location
London, GB

Highlights

  • Optimised Contractor Involvement (OCI) proposals
  • Value Engineering Services
  • SCL Auxiliary shaft and SCL tunnels
Limmo Main Shaft

Limmo Main Shaft

Limmo Auxiliary Shaft bottom

Limmo Auxiliary Shaft bottom

3D model Limmo auxiliary shaft

3D model Limmo auxiliary shaft

Limmo Shafts and Tunnel layout - left auxiliary shaft - right main shaft

Limmo Shafts and Tunnel layout - left auxiliary shaft - right main shaft