Copthall Tunnel

Scope of works

The project comprises the construction of a 1,000m long cut and cover tunnel constructed progressively from West to East. The Kilnbridge scope includes all of the formwork, reinforced concrete and waterproofing works, as well as the construction of over bridges, ventilation shafts and maintenance structures. The management and supply of cranage and lifting equipment is also part of the package.​

Additional packages of works include the construction of two underbridges and retaining walls, Breakspear Road South Underbridge and River Pinn Underbridge and the FRC package for the Ruislip Southern Treatment Area.

Challenges

• Management of deliveries and logistics for 75,000m3 concrete and 25,000 tonnes of reinforcement on a just in time basis
• Achieving architectural concrete finish patterns

Achievements

• Management of deliveries and logistics for 75,000m3 concrete and 25,000 tonnes of reinforcement on a just in time basis
• Installation of more than 200 pre-cast units