The Grauholz Tunnel is a double track railway gallery of a total length of appr. 6, 3 km.
The Grauholz Tunnel lies north of Berne, capital of Switzerland.
carousel segment formwork
TBT TUNNEL 2750 RADIUS – SYRIA
Tunnel segments
THE CHANNEL TUNNEL – FRANCE
Tunnel segments
UNDERGROUND U-BAHN MUNCHEN
Tunnel segments
LOCHER – ZURIG
Tunnel segments