820 m of tunnel were excavated during the past few weeks using the impressive tunnel boring machine. The tunnel tube is being continuously
secured with segment rings.
arch has been sealed, reinforced and concreted on the first 540 m. The prefabricated
service tunnel elements were transferred onto the completed invert arch as well
as sealed and backfilled. The reinforcement transport carriage has already been
positioned in front of the tunnel tube at the southern portal. Currently the
formwork carriage is being installed. The simultaneous excavation and inner
lining present a challenge in terms of organization on the construction site.
Marti Tunnelbau AG
Marti Technik AG