The £655M Bank Tube station modernisation in London has reached a major milestone with the completion of a tunnelled connection between Cannon Street station and the Northern Line.
The breakthrough was made at the bottom of a new 8m diameter escalator barrel, which will carry passengers between the ticket hall and the south bound platform.
At present, the narrow Northern Line platforms at Bank are heavily congested and are unable cannot cope with passenger volumes.
A new, wider southbound platform tunnel is being built adjacent to the existing one, to ease congestion.
Track in the 750m long tunnel will be connected into the rest of the Northern line during a four month long blockade in summer 2021.
During this time trains will be re-routed and the existing south-bound tunnel tracks filled in to create a new concourse and provide extra capacity. Cross passages 15m long will be excavated to connect the north and south bound platforms.
The new southbound tunnel will be 10m in diameter compared to the original south bound platform tunnel which is only 6.5m.
Contractor Dragados is carrying out the work at the station.
The new station entrance at Cannon Street will also provide step free access to Northern Line and Docklands Light Railway platforms. It will also create a more direct route to the Tube platforms.
Over 1,000m of new tunnels have been excavated so far at the station, with nearly 200,000t of material removed.
Transport for London major projects director Stuart Harvey said: “Bank Tube station is one of the busiest and most important stations on the network.
“The area around the station has a high concentration of important infrastructure both above and below ground, including a number of historic, significant buildings in the local area, making the upgrade work incredibly complex.
“The hard work done by the project team will result in real improvements in the journeys of hundreds of thousands of customers every day.”
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