Planning services in project phases 4&5 (SIA 112) for the following work, as part of the expansion of the LBT:

ZST Mission

In the repair planned in VL08 for a service life of 30 years, detected local damage is repaired. Zones in which a sufficient condition is determined are maintained. In the upper ~1'200m a flat vault seal must be installed. A ~20m long carbon zone has to be rehabilitated with base vaults & steel arches (due to large deformations). Electromech. Equipment. must be laid & a new radio cable must be installed.

FST jetty

The ~3.1km long FST has been driven with a TBM; the built-in safety measures no longer guarantee occupational safety, so that the FST in the VL09 completely differed over the entire length. Backup types must be saved later. In the portal area, 3 karst water inlets have to be renovated. Electromech. Equipment. must be carried out as in ZST Ferden.

Planning services in project phases 4&5 (SIA 112) for the following work, as part of the expansion of the LBT:

ZST Mission

In the repair planned in VL08 for a service life of 30 years, detected local damage is repaired. Zones in which a sufficient condition is determined are maintained. In the upper ~1'200m a flat vault seal must be installed. A ~20m long carbon zone has to be rehabilitated with base vaults & steel arches (due to large deformations). Electromech. Equipment. must be laid & a new radio cable must be installed.

FST jetty

The ~3.1km long FST has been driven with a TBM; the built-in safety measures no longer guarantee occupational safety, so that the FST in the VL09 completely differed over the entire length. Backup types must be saved later. In the portal area, 3 karst water inlets have to be renovated. Electromech. Equipment. must be carried out as in ZST Ferden.