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Preparations at Canary Wharf Station box for arrival of tunnelling machines.Crossrail workers are making good progress on building 26 miles (42km) of tunnels beneath the capital. .The new Crossrail route includes a 26 mile (42km) section of tunnels beneath London. Five huge tunnelling machines are now in operation in west, east and southeast London with over 5.5 miles (9km) of tunnels now built. Tunnelling is also well underway beneath central London station sites using Sprayed Concrete...
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