ÖBB - Infrastruktur AG
2015 - 2020
Geological Construction Documentation, Geotechnical Consultancy, Expert StatementPDF-Download
Lot 60.3 “St. Kanzian” and 60.5 “Stein” within the Mittlern–Althofen section with a total number of 5 tunnels, several bridges and open-air-sections is another milestone of the Koralmbahn high speed rail between Graz and Klagenfurt.
Both construction lots comprise a total length of mined tunnel sections of more than 2,5 km in rock (Tunnel Stein and Tunnel Lind), as well as in soil (Tunnel Untersammelsdorf), more than 500 m cut-and-cover sections (Tunnel Stein). Moreover the lots contain portal and slope cuts, a cut-and-cover Tunnel (Peratschitzen), top-down-method sections (Tunnel Srejach) as well as bored pile walls, anchor walls, noise protection dams, bridges, landfill sites and material extraction sites.
Total investment for lot 60.3 St. Kanzian: 140 million EUR
Total length of lots 60.3 and 60.5: 8,5 km
Total length mined sections: 2.603 m, Top-down-method sections: 668 m
Cut and cover sections: 839 m
For the Srejach and Untersammelsdorf tunnels extensive dewatering and soil stabilisation measures like bored piles, jet grouting, etc. were necessary as a consequence of the difficult ground conditions within the so called “Seeton”, a highly water saturated, soft, clayey- silty to sandy sediment.
iC was in charge of the engineering-geological documentation and consulting in the construction phase of lots 60.3 and 60.5.