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Ulriken Tunnel
Norway, Bergen
2015 – 2017
Premiere in Norway

For the first time a railway tunnel in Norway was being driven with a TBM. A Gripper TBM from Herrenknecht excavated the 6.9 kilometers of the Ulriken Tunnel for the expansion of the previously single-track connection between Bergen and Arna to double track. Because the new tunnel was built at a distance of only 30 meters from the existing tunnel, mechanized tunnelling was given preference over drilling and blasting.
Due to changes in the construction processes the TBM had to be assembled in Arna outside the portal of the approach tunnel. In cooperation with the joint venture contractor, Herrenknecht developed a special walking mechanism for the cutterhead, with which the assembled back-up is pulled along in two meter steps. Herrenknecht personnel supported the customer throughout the assembly process.
For the tunnelling in extremely hard gneiss and with an overburden of upt o 600 meters Herrenknecht equipped the Gripper TBM with a total of 62 19 inch disc cutters.
In December 2015 the machine was christened "Ulrikke" and then began the drive. As soon as early April 2016 the jobsite reported average tunnelling rates of 18 meters per day. On August 29, 2017, the team on the Herrenknecht machine drilled through the last meters of rock – breakthrough was achieved after only approx. 21 months and best weekly performances of up to 169 meters.

Data Sheet

Country, Location

Norway, Bergen

Year

2015 – 2017

Application

Railway

Geology

Rock
Augen gneiss, granitic gneiss

Tunnelling length

6,894 m

Machine Data

1x Gripper TBM:
Diameter: 9,300 mm
Lining method: Rock support
Cutterhead power: 4,200 kW
Torque: 10,238 kNm

Your contact person Contact us

Jack Brockway President and CEO Herrenknecht Tunnelling Systems USA Inc.
Gerhard Goisser COO Herrenknecht Tunnelling Systems USA, Inc.