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Coulsdon (London), tunnel under Smitham Station

General information

CT deBoer got instructed to place a traffic tunnel at its definitive position underneath a railway track that was still in use. The tunnel got pushed to its position, using 22 jacks with a capacity of 680 tons each.

Involved parties:

Client: Transport for London

General contractor: Hochtief UK


Numbers/technique used:


– Tunnel mass: 8.500 tons (biggest in tunnel ever pushed in place)

– Pushing distance: 45 meter

– Hydraulic capacity: 15.000 tons


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