In Situ Stress Strain Measurements at Tottenham Court Road Platform Tunnel

The redevelopment of Tottenham Court Road Underground Station started in 2011 as part of the Tube Upgrade Plan to improve and increase the capacity of the existing facility. The plan is to upgrade the station by 2016 to meet an estimated demand of more than 200,000 journeys per day once Crossrail is built.

During April to November 2011, major structural work was carried on the Northern Line platform tunnels as part of the station upgrade. This included removing tunnel lining segments on the platform side to allow construction of new cross passages to improve access to the platforms.

The works presented an opportunity for the Imperial College research team to trial their field instrumentation.