The team that led the construction of the HS2 tunnels under central London signed the first two contracts for the production of precast concrete elements.
SCS JV, a partnership between Skanska, Costain and Strabag, has signed the British subsidiary of the Spanish concrete company Pacadar under contract.
The company recently completed 12 km of tunnel segments for the Thames Tideway project.
HS2 did not disclose the value of the contract, but it is believed to be the largest Pacadar UK contract ever.
The company’s Kent facility will produce 58,000 individual concrete segments to clad the 42 km long tunnels that run from the railroad terminus at Euston Station to West Ruislip on the outskirts of the capital.
Production will begin in January of next year with the transport of the seven-ton segments by rail to the tunnel starting point in West Ruislip.
They will then be installed in tunnels with a diameter of 9.5 meters by two huge 2,600-ton tunnel boring machines, which are scheduled to go into operation in early 2022.
Over 160,000 m3 of concrete are used, with each complete ring consisting of seven segments and a key.
The tunnels, which will run up to 50 meters underground, will be divided into two sections by the £ 1.1 billion Old Oak Common station, which is being built by a JV between Balfour Beatty, Vinci and Systra.
SCS JV was awarded the contract to build both sections on a pair of deals totaling £ 2.3 billion.