Owner
London Underground
Client
Halcrow Atkins JV
Cost
£150 million GBP
Timeframe
January 2011
— January 2013
Services performed
Design of the primary and secondary sprayed concrete linings, 3D FE modelling of all SCL tunnels including excavation steps and ground movement assessments.
Description
Bond Street tube station is a major gateway to London's West End served by both the Central and Jubilee lines. As part of the LU tube upgrade plan, the station is undergoing a major upgrade to increase capacity, improve accessibility and create interchange with the new Crossrail station. The project provides two additional escalators from the interchange level to the Jubilee line, low-level interchange route between the Central and Jubilee lines, a new step-free entrance, ticket hall and new lifts. The majority of the tunnelling works will be mechanically excavated and lined with sprayed concrete.
Geology
The tunnel horizon is generally within the London Clay formation with the lowest tunnels sitting in the Lambeth Group, where clay layers and water bearing clayey sands are inter-changing.
Location
London, UK
Highlights
- Complex geometry to accommodate extensive infrastructure
- Employment of a wide range of SCL construction techniques
- SCL solution for a hybrid overbridge in place of squareworks
Connection chamber one
Graphic showing split of 3D FE models
3D view of proposed tunnelling and existing infrastructure
Northern Tunnels in relation to Jubilee Line platforms and Post Office Tunnel
Binocular Tunnel at Jubilee Platform level
3D Graphic showing construction site and building frame used for laydown/plant