— January 2013
Design of the primary and secondary sprayed concrete linings, 3D FE modelling of all SCL tunnels including excavation steps and ground movement assessments.
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.
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.