Pre-assembly of the Invert Formwork Bözberg

The Bözberg tunnel is part of the big project of the Gotthard axis: a total of 270 kilometers between Basel and the Italian border will be developed by 2020.

The existing Bözberg tunnel between Frick and Brugg in the canton of Aargau does not meet the requirement of the SBB Swiss Federal Railways and will therefore be replaced by a 2.7 km long new tunnel.

KERN Tunneltechnick SA will provide for this project one invert shutter and two polycentric shutters.
The Invert Shutter consists of 4 main parts: the 12.5m long forms, the trelliswork, the carrier and the upper structure made with the TSK system. This last structure as a double function; contrasting the up-lift force due to the fresh concrete pressure and support the chain hoist to transport the material from one side of the machine to the other.

On the 02.02.2018 has been performed the first commissioning of the machine with the final client in the KERN’s workshop. The machine will be now partially disassembled and delivered to job site.