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Dublin Port Tunnel

The last of 39 pipejacked steel tubes was driven last month for the crossing of the £282M Dublin Port Tunnel beneath the main Dublin to Belfast railway line. The twin tube, dual two lane road tunnel will pass only 6m below the main line and two suburban lines which run alongside it on the embankment above. Irish rail authority Iarnrod Eireann was not willing to allow a jacked concrete box solution for construction and so the Nishimatsu-Mowlem-Irishenco joint venture building the project has opted for an array of jacked pipes filled with concrete to provide temporary support during excavation.

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