The arch is taking shape: Interior construction Riedberg Tunnel A9.

Currently, the Volken Group, as part of a consortium consisting of Frutiger AG and Prader Losinger AG, is constructing the interior of this highway tube near Gampel-Steg. The inner ring is a self-compacting concrete that is AAR-resistant (chemical reaction that can lead to cracks) and resistant to frost and de-icing salt. The construction of the tunnel vault from around 73 m3 of concrete is demanding, as all the pressure has to be absorbed by mobile formwork - a formwork carriage.

Benefits with the Volken Group

Effective networks

We maintain strong relationships with partners, suppliers and customers.

Open to innovation

Everyone plays a part in our company. For us, new ideas drive progress.

Open to different cultures

Our teams consist of people from all over the world who work hand in hand with one another.