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  Surface Challenges and underground solutions. The Follo Line Project

  Acciona Ghella Joint Venture is commissioned by the Norwegian National Railway Administration (Bane NOR) to construct the main part of the Follo Line tunnel (EPC TBM). The tunnel will be the most significant part of the project, including two 20 km separate single-track twin tunnels. AGJV will construct 37 km of the tunnels by using four Tunnel Boring Machines (TBMs). What really makes this project probably iconic in the world is the logistical challenge of having the four TBMs starting in the same site location, compared with the typical two TBMS from each end configuration. The design of all the installations in the same location, has been a great challenge and the actual design achieved is a robust, compact and ready for 24/7 works under extreme winter conditions (-25º C) solution, that really has transformed a Surface challenge into an underground solution.

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