Client
Hordaland Fylkeskommune represented by the company BYBANEN Utbygging
Main contractor
Marti Tunnel AG, Switzerland represented by branch office Marti Tunnel NUF
Construction period
January 2018 – December 2022
Description of main objects:
- Double track tram tunnel with cross passages to walk/bike tunnel (as escape tunnel)
- Walk/bike tunnel as escape tunnel
- Portal with roundabout at the top
- Natural stone walls
- Pump station and emergency reservoir
- Technical rooms in the tunnel
- Landfilling and access tunnels to depots
- Tram depots
Description of tunnel excavation:
- main double tract tram tunnel, L= ca. 2900m, profile T9.5 (ca. 10m width and 6m height), excavation volume ca. 233 300 m3
- escape walk&bike tunnel, L= ca. 2900m, profile T7.5 (ca. 7,0m width and free height ca. 4,6m), excavation volume ca. 169 700 m3 (biking path with 3,5m width, walking path with 2,5m width)
- 6 pcs of escape corridors, L= ca. 18m of each EC, profile T4.0 + 5 niches in connection to escape corridors. Total volume ca. 8500 m3
- 2 technical rooms, excavation volume ca. 1500 m3
- Pumping station and emergency reservoir, total excavation volume ca. 5000 m3
- 2 pcs of caverns as train depots (L= ca. 130m, width ca. 17 m, height ca. 8 m. A= ca. 140m2)
- Access tunnel to tunnel depots, L= ca. 450m, cross section vary from ca. 55m2 – 180m2
- Equipment of tunnels (watter&frost lining, technology, trolley-lines etc.)
Technology of construction: (norwegian tunneling method) + systematic probe-drilling and grouting works if required