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The first of the London tunnels for the Channel Tunnel Rail Link broke through last week when contractor Costain/Skanska/Bachy Soletanche's tunnel boring machine (TBM) broke into a ventilation shaft at Barrington Road in east London. The 7.15m diameter Wirth TBM had completed a 4.7km section of tunnel from Stratford. This is the first of two tunnels being built between Stratford and Manor Park in East London as part of Contract 240. Its sister tunnel is due to emerge into the same shaft ...

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