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Tottenham Court Road Station Upgrade

Halcrow Group Limited

The Tottenham Court Road Station is being upgraded to increase capacity so as to better accommodate current and future commuter needs. At the same time, the upgrade will minimize passenger journey time and improve the quality of access within the station. The upgrade will include a new concourse tunnel, escape tunnels, cross passages, interchange tunnel, and connector stub tunnels.

 

Independent Category 3 Design Check of SCL / NATM Tunnels:

Gall Zeidler Consultants was responsible for conducting a Category 3 Independent Design Check of the Sprayed Concrete Lining / New Austrian Tunneling Method (SCL / NATM) for the project. This check included evaluating the geotechnical conditions and design parameters, construction sequences, excavation and support details, construction details, numerical analyses, waterproofing details, monitoring proposals and a review of the designer’s hazard and risk assessments.

Location:

London, United Kingdom

Date:

2008 – 2011

Structure:

Concourse Tunnel, Cross Passages, Escape Tunnels, Stub Tunnels, Interchange Tunnel

Length:

Concourse Tunnel: 34.5 feet (10.5 meters) Wide, 35.5 feet (10.8 meters) High
Cross Passages: 16.5 feet (5 meters) Wide, 20 feet (6 meters) High

Cross-Section:

Escape Tunnels: 16.5 – 20 feet (5 – 6.5 meters) Wide, 19 – 20 feet (5.8 – 6 meters) High

Geology:

Fill, Terrace Gravels, London Clay, Lambeth Group

Cost:

Estimated US $176 Million

Client:

Halcrow Group Limited

Owner:

London Underground, Ltd. (LUL)