Norwegian National Rail Administration, Jernbaneverket, has announced that two of the four TBMs customized for the rock conditions in the Follo Line Project are now ready from factory. The second TBM for this Norwegian large scale project is now accepted by Jernbaneverket at Herrenknechts factory in Germany.
Another two tunnel borers are still in production, and the foursome will be operational by the end of this year. The TBMs will work their way through Norwegian granite and produce the whole 18, 5 km TBM-tunnel by the end of 2018 according to plan. Starting from the installation site in Åsland, two will head northwards to the capital of Oslo, the other two will head south towards the regional transport hub at Ski.
The now completed TBMs will arrive at the construction site in pieces and be assembled in an underground cavern at the construction site. According to plan, the first TBM will start boring towards Oslo in September 2016, the second one month later.
The twin railway tunnels made by the TBMs will be 8.75 meters in internal diameter, and 18.5 km long. In total, the tunnel will have a length of 20 km. The four TBMs will each have a length of 150 m and weigh 2400 tons.
Share on:
