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Progress at Chiltern tunnel site as HS2 prepares for arrival of first tunnelling machines

Align JV team complete 17m headwall and ground reinforcementLatest images of the completed headwall can be found here: https://visual.library.hs2.org.uk/p/share/N9N97h8gGH-zPreparation for the arrival of HS2’s first giant tunnelling machines has passed a major milestone with the completion of the 17m high headwall and ground reinforcement at what will become the south portal of the 10-mile long Chiltern tunnel.

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