Breakthrough celebration KER450
Almost two years after the start of construction in 2020, the breakthrough of the tunnel boring machine for the construction of the safety tunnel of the A3 highway Kerenzerbergtunnel took place on Wednesday, September 28, 2022.
The number of guests who were able to watch the breakthrough on site on this day was numerous. After representatives of the client and the consortium gave interesting welcoming speeches, the tunnel boring machine started to excavate the last meter. It took just under 40 minutes for the last layer to be cut through.
Tunnel boring work is completed after this breakthrough. The tunnel boring machine will be dismantled in the Tiefenwinkel longitudinal cavern in the coming months. In the further course, the mining tunnel work and the interior work will now be continued. Construction of the safety tunnel will be completed in 2024.
We would like to thank our employees for their tireless efforts and wish all those involved in the project a successful and accident-free completion!