Switzerland Biggest Tunnel Boring Machine Diameter

Would you like to see a masterpiece of engineering? If yes, then this video is for you! Today we are talking about the largest tunnel boring machine in Switzerland. This is TMB Diameter machine. Altogether 500 million Swiss francs will be invested for redeveloping the 3,2 km long Belchen Tunnel. The scheme began in 2015.

A JV comprising the companies Marti Tunnelbau, Marti Solothurn is charged with building the new tube on the Swiss A2 motorway between Hagendorn in the Canton of Solothurn and Eptingen in the Canton of Basle-Land on behalf of the Swiss Federal Roads Office (FEDRO / ASTRA).

Once completed in 2022, the new tunnel will enable the two directionaly-separate, two-lane tubes of the original Belchen Tunnel dating back to 1970 to be refurbished without restricting traffic. Currently the four available lanes cope with a traffic volume of no less than 55 000 vehicles per day.

Check out this very informative video below and enjoy!