Bank Station Capacity Upgrade - Site Supervision

Owner
London Underground
Client
Dragados S.A.
Cost
£563.8 million GBP
Timeframe
August 2013 — ongoing
Services performed
Design of tunnels and shafts (primary lining, waterproofing and secondary lining). Design representation on site during construction.
Description
Bank Station is a London Underground station located in the City of London financial district. It is a key interchange served by five existing lines. The Bank Station Capacity Upgrade (BSCU) aims to relieve heavy passenger congestion during peak hours for boarding, alighting and interchange. The capacity upgrade comprises the construction of a new southbound platform tunnel and associated length of running tunnel for the Northern line, connecting passageways to the existing station tunnels, and the provision of step-free access from King William Street. The total length of tunnels is 1,300m with tunnel cross sections that range from 10m2 up to 90m2.
Geology
The geology comprises London Clay formation overlain by Quaternary superficial deposits and made ground.
Location
London, GB

Highlights

  • Multiple pile interceptions along the running tunnel
  • Inclined barrel constructed bottom up very close to live LU assets
  • Hybrid sprayed concrete lining (SCL) and squareworks structures next to live LU assets

Exposure of live LU asset (existing cast iron platform tunnel shown)

Hybrid SCL and squareworks structures