Geomechanics and Tunnelling Issue 6/2011
Cover Story: The Châtelard access tunnel for the Nant De Drance pumped storage power station was driven in 2009.
The portal represented a great challenge for the designer and the contractor because the railway line from Martigny to Chamonix is only 3 m above the top heading. The support at the portal consists of a reinforced concrete beam, prestressed anchors 25 to 35 m long and 9 m long rock bolts (see report on page 627).
Topics of Geomechanics and Tunnelling 6/2011:
- Durchmesser Line Zurich
- Nant De Drance pumped storage plant
- Linth-Limmern pumped storage plant
- Segment design
- LCPC abrasivity coefficients
- Recycling of tunnel spoil