Koralm Railway Line connects: breakthrough in Untersammelsdorf
moreOne of the most challenging structures of the Koralm Railway Line, the Untersammelsdorf Tunnel near St. Kanzian (Austria), was officially completed with the breakthrough of the top heading in late April.
The Untersammelsdorf Tunnel is the most complex of six tunnel structures and has a total length of 665 m and a maximum overburden of 30 m. Large parts of the tunnel were excavated adopting the cut-and-cover method, while in the portal areas the top-down construction method was used. A tunnel rescue site for emergency services is being built at the tunnel’s western portal.
Together with partners of ÖBB Infrastruktur AG, ILF Consulting Engineers has been working on the design of the tunnel structures in the “Mittlern–Althofen” section since 2006.
