Austria – Construction work for bridges and tunnels, shafts and subways – AMA49902 - Loifarn - Dorfgastein; Oberer und Unterer Klammtunnel Modernisierung, km 7,416-8,949, Bau - Ertüchtigung Oberer- und Unterer Klammtunnel

The subject of the award includes tunnel construction work in connection with the modernisation of the upper and lower Klamm tunnels on the ÖBB route Schwarzach - St. Veit im Pongau - Spittal am Millstättersee:

- Construction measures to increase the load-bearing capacity, usability and durability of the existing masonry (with and without existing sprayed concrete shell)

- Repairs to the portals in the area of the Klamm

+ South portal of the Lower Klamm Tunnel

+ North portal of the Upper Klamm Tunnel

- Repairs to the north portal of the Lower Klamm Tunnel

- Accesses to the main tunnel drainage in the base by means of new shafts between the sleepers

- Signage of niches and escape route marking in the tunnel

- Signage in the area of the portals

- Upgrading of the access roads in the pre-portal area UKT North and OKT South as well as forecourt UKT North

- Support structure for overhead line/conducting rail (=bracket) -> installation of the frames will be carried out subsequently by third parties