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26May94 UK: SHORT CUT - JUBILEE LINE TUNNELLING - COSTAIN, TAYLOR WOODROW JOINT VENTURE CLOSE TO COMPLETION.

A joint venture of Costain and Taylor Woodrow is close to completing the first stretch of tunnelling on the £1.8 billion Jubilee Line Extension.The tunnel, which is just 40 m long, is being constructed in London clay by the New Austrian Tunnelling Method. It is only the second time that major tunnelling work has been carried out by this method in London clay and it is being used as a trial for the benefit of other contractors on the Jubilee Line.The trial tunnel, which has a diameter ...

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