Bank Station Capacity Upgrade - Design

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, secondary lining). SCL, squareworks and connections to existing assets.
Description
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.
Geology
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.
Location
London, GB

Highlights

  • Two pile interception structures along the proposed running tunnel
  • Challenging inclined barrel excavation very close to live LU assets
  • SCL Optimisation - a combined lining approach

3D render of existing and new structures

3D render of existing and new structures

BSCU project overview

BSCU project overview

View of ground movement cone

Location/Footprint of the proposed 3D FE models

Location/Footprint of the proposed 3D FE models

3D pdf cut for escalator 4, including new and existing assets upon completion

3D pdf cut for escalator 4, including new and existing assets upon completion

2D Phase 2 analysis for a situation where new tunnels are above the existing assets

2D Phase 2 analysis for a situation where new tunnels are above the existing assets

King William Street station entrance

King William Street station entrance