www.aplitop.com APLITOP Case Study TITLE Ulriken Tunnel USER AND COMPANY Company: AZVI Norge Web: www.azvi.es Location: Bergen (Norway) Name: Joan González Pi Position: Surveying Manager / BIM Manager E-mail:
[email protected] Main activities: The Azvi Group is divided into four business areas: construction, concessions, real estate developments and rail transport. It has a presence in Europe, America and the Middle East. PROJECT CHALLENGES Azvi has signed the contract with Bane NOR (Norwegian public railway infrastructure manager) to carry out the rehabilitation of the old Ulriken railway tunnel in Bergen, within a period of 29 months. This tunnel was built in the 1960s and runs parallel to the new Ulriken tunnel. The rehabilitation will consist of the widening of the tunnel section, at different points along the 7.6 km length. In order to carry it out, 38,000 m3 of rock must be excavated. In the central 6.2 km of the tunnel, it will be necessary to blast more than 100 sections without dismantling the track. This is a great challenge for Azvi, for which it has designed an innovative technical proposal, which has been highly valued by Bane NOR. The project is totally designed in a BIM environment, which information is available mostly in IFC and XML formats. The rehabilitation consists of expanding the tunnel section and subsequently covering it, leaving a space between the waterproofing and the rock to be able to drain the leaks from the mountain. By having several layers, the tunnel section is a challenge for the control of the execution of the work.