Factory acceptance of Follo Line TBM
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June 08, 2016: Four 9.9m diameter double shield Herrenknecht TBMs are procured by the Acciona/Ghella Joint Venture to excavate the Follo Line high-speed railway tunnel between Oslo and Ski in Norway. With two machines on site and in assembly, and with the third in preparation for shipment and the last factory tested and accepted at the Herrenknecht factory, all four are scheduled to be in operation by the end of 2016, with the last machine breakthrough scheduled for the end of 2018.

Acciona/Ghella selected for Follo Line TBM tunnel - TunnelCast, March 2015
TBMs will excavate the Oslo-Ski Follo Line - TunnelCast, November 2012
Direct twin-tube route for Oslo-Ski railway - TunnelCast, October 2010


Factory acceptance of Follo Line TBM

Shani Wallis reporting for TunnelTalk
Location: Herrenknecht factory, Schwanau, Germany
Project: Follo Line railway project, Norway
Event: Acceptance of last or four Herrenknecht TBMs for the project
Interviewed: Fernando Vara,
Project Director
Acciona/Ghella Joint Venture
Matteo Ortu,
Construction Director
Acciona/Ghella Joint Venture
Anne Kathrine Kalager,
Project Manager
Norwegian National Rail Administration
Project data: 22km twin-tube railway tunnel
Geology: Hard gneiss rock
TBM tunnels: Four TBMs x four 9.5km long drives
Lining: Precast concrete segmental lining
Cutterhead power: 4,550kW
Disc cutters: 19in cutters
Torque: 11,115kNm