Design of tunnels and shafts (primary lining, waterproofing, secondary lining). SCL, squareworks and connections to existing assets.
Bank Station is a London Underground station located in the City of London financial district. It is a key interchange served by five 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 the SCL tunnels is 1,300m with tunnel cross sections that range from 10m² up to 90m².
The geology is expected to comprise London Clay formation overlain by Quaternary superficial deposits comprising river terrace deposits and alluvium which are generally overlain by made ground.