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Norway's mega-project to tender in Autumn Jun 2012
Peter Kenyon, TunnelTalk
The first of four contracts to excavate Norway's longest subsea tunnel to date will be tendered in the Autumn.
Anne-Merete Gilje, Construction Manager for the Ryfast project for Statens Vegwesen, the Norwegian Highways Authority, told TunnelTalk that the undersea link between Stavanger and Tau will be constructed under four contract lots (E02, E03, E05 and E06), the first starting at Solbakk in early Spring 2013. A small contract for preparation of the site for tunnelling will be announced later this month (June).
Project managers are expecting considerable interest from foreign companies.
Alignment for Ryfast subsea tunnels

Alignment for Ryfast subsea tunnels

"The next contract of the four lots will start from Hundvaag by early Summer 2013, with the third one for the Eiganestunnelenstarting in Autumn 2013, and the last one, starting from Bu√ły in late Autumn 2013," said Gilje.
The undersea link will be let in four lots

The undersea link will be let in four lots

    The mega-project, which is scheduled for completion by the end of 2018, consists of two elements:
  • Two undersea tunnels, the 14km Solbakk undersea tunnel (at 290m below sea level) and the 5.5km undersea Hundvaag tunnel (at 95m below sea level), which when complete will link Stavanger and Tau. The cost of this element of the project (the Ryfast project) is estimated at NOK5 billion (US$826 million). Funding will be 90% from tolls and 10% from local government.
  • A 3.7km tunnel in Stavanger city, the Eiganes tunnel, which has a construction cost estimate of NOK2 billion ($US330 million), will link traffic directly into the Hundvaag tunnel. This is being funded 50% each by tolls and central government.
All the tunnels will comprise a 2-lane twin-tube construction.
"We did consider the TBM construction method for this project, but finally found drill+blast preferable. Our design consultant Norconsult is working on the final designs," said Gilje.
References
New undersea mega-project for Norway - TunnelTalk, May 2012
Norway's newest undersea road tunnel opens - TunnelTalk, December 2009
Links across the waters: Straits Crossings conference report - TunnelTalk, January 2010

           

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