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HS2 - Copthall Tunnel

Location: UK
Customer: SCS JV
Working years: 2023 - 2024
Project information: Copthall Tunnel is one of five green tunnels being built along Phase One of the new high-speed rail route. Situated between HS2’s Northolt Tunnel and the Colne Valley Viaduct, the 880m-long reinforced concrete tunnel will blend into its natural surroundings, covered with trees and plants once construction is complete.

The project is being delivered by Skanska Costain STRABAG Joint Venture, with Kilnbridge appointed to complete the reinforced concrete works.

Making the tunnel a concrete reality has been possible with custom formwork travellers engineered by PERI’s specialist infrastructure team.

As the travellers were expected to be in use over an 18-month period, the main drivers influencing their design were durability, productivity, and sustainability. This meant engineering an efficient and quick system

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Supplied equipments: Supply of No.4 units in total, two for the wall and two for the roof.

The carriages are designed to reduce material, manual labour and cranage as the main operations such as striking, positioning and travelling are completed hydraulically.

The wall forms are built from special modular steel panels. 
Each set is designed to build 20m-long and 7.5m-high walls.

The panels are suspended from a carriage which is designed using off-the-shelf components from PERI’s VARIOKIT range, with some specially fabricated connection parts.  VARIOKIT rails provided additional support for the formwork, reducing through ties to less than half the quantity required in a traditional panel system.

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