Crossrail Western Running Tunnels. Crossing of London Underground: Victoria Line and Bakerloo Line Assets.

Summary

The C300 running tunnels are of comprised a 6.2m internal diameter, 7.1m excavated diameter, and are to be driven by Earth Pressure Balance Machines (EPBMs) from West to East commencing at Royal Oak Portal and terminating at Farringdon Station via Paddington, Bond Street and Tottenham Court Road Stations. Crossrail TBM (Tunnel Bored Machine) Drives cross different assets along their way. One of the most critical and interesting crossings is to the East of Bond Street Station, as a number of 3rd party assets are found within this area. In less than 110 metres, the Westbound TBM (WB TBM) crosses under the Victoria Line running tunnels and the Bakerloo Line tunnels. The first asset is the Victoria Line Northbound running tunnel (VLNB) along with the Cross-passage connecting it to the Victoria Line Southbound running tunnel (VLSB), where the Westbound TBM passes just 3.095 metres under the first asset. Only 48 metres ahead, WB TBM will be vertically below the VLSB and Bakerloo Line Northbound and Southbound running tunnels (BKNB and BKSB) with a maximum clearance of 5.23 m. This paper details the TBMs operating parameters during the construction of the Crossrail western running tunnels and analyses its effects in terms of induced settlements on the above assets.

Full Resource