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Follo Line final TBMs breakthrough

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Published on Feb 26, 2019

Within 30 months, some 20km of double shield TBM tunnel excavation and precast concrete segmental lining was completed on Tuesday 26 February 2019 when the final two machines broke through simultaneously at the Ski portal for the Follo Line twin tube railway tunnel in Norway. The first double TBM breakthrough occurred in September 2018 ..

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