A European infrastructure project of superlatives is nearing completion.
One of the most significant rail infrastructure projects is approaching its conclusion: the Koralmtunnel. The focus over the past year was the installation of the overhead conductor rail – a demanding sub-project realized by Rhomberg Sersa Rail Group (RSRG) in partnership with another contractor.
Over the past five years of intensive construction, RSRG, together with a joint venture partner, has implemented both the installation of the slab track (Lot GU1) and the electrical and mechanical equipment (Lot GU2). In addition, the Rhomberg Sersa Rail Group contributed its expertise in the fields of digitalization and robotics, installed various ballasted tracks and switches on the eastern approach line and at logistics terminals, and ensured reliable traction power supply including the connection of the overhead catenary system.
Another milestone towards commissioning this major project was reached last year: the 33 km long tunnel was equipped with an overhead conductor rail – a particular challenge delivered by RSRG as part of the joint venture. Each partner equipped one tunnel tube. Skilled specialists worked in double-shift operation to complete the demanding installation works on schedule.
The installation of the overhead conductor rail was carried out using specially developed assembly units that enabled precise and efficient installation. Every step was executed with the highest accuracy. One of the key challenges was adhering to the tight tolerances, in particular the contact wire height, which had to be installed with an accuracy of +/- 4 mm. In February of this year, the tunnel was handed over on schedule.
The year 2025 will be dedicated to final works. In particular, the dismantling of temporary installations required for the tunnel construction will be carried out. For example, this autumn will see the removal of four switches and around 700 m of track at the eastern construction site facility in Wettmannstätten.
