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Network November 2018

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NETWORK / 21 / NOVEMBER 2018 THE TUNNEL UNDER THE THAMES THE PROJECT IN NUMBERS £18 million Total cost of the Tunnel Under the Thames project. 330m Length of tunnel. 4,500m 3 The amount of material excavated from the tunnel and shafts. 30m The depth of the shafts installed at both the Royal Hospital Chelsea and Battersea Park. 24 The number of days it took for the Tunnel Boring Machine (TBM) to complete its tun- nel drive under the River Thames. 18" The diameter of the new intermediate pressure steel pipeline installed within the tunnel. 1. 7.5m diameter north shaft construction utilising a segmental ring and cassion jacks to sink the shaft into the ground. 2. Aerial view of north shaft construction site with Royal Chelsea Hospital in the background. 4. Aerial view of TBM ahead of launch. 3. Tunnel boring machine (TBM) breakthrough in 6.0m diameter south shaft, Battersea Park. 5. Pictured from left to right: Tom Mullaney – Chelsea Pensioner; Stuart Donaldson – engineering manager, Cadent; Amanda Lord, infirmary business manager at the Royal Chelsea Hospital who Cadent named the TBM after; Matthew Behan – CEO, Barhale (tunnelling subcontractor); Andrew Hejdner – project manager, Cadent. 6. Map showing route of the tunnel.

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