The Granitztal Tunnel Chain – State of works on the second longest tunnel system on the Koralmbahn / Tunnelkette Granitztal – Stand der Arbeiten für das zweitlängste Tunnelsystem an der Koralmbahn

Abstract

The Granitztal Tunnel Chain is not only the second longest tunnel system on the Koralmbahn line but also an essential part of the future new railway line between Graz and Klagenfurt (New South Range Line). At the time of reporting, more than two-thirds of the tunnel excavation works on the Graniztal contract are completed. After a detailed description of the project with four simultaneously advancing TBM drive and the extensive concreting ad earthworks in the Granitztal, the geological and geotechnical conditions and the experience gained until now are described. Particular attention is paid to the challenging geotechnical conditions in the Langer Berg section and the overground section in the Granitztal. The intensive design work to optimise future maintenance work is also described.

From the Lavanttal into the Jauntal – Project implementation and first experience of design and build 4.0

“…The tunnelling directions are specified from the Lavanttal into the Granitztal for the Deutsch Grutschen Tunnel and from the Granitztal into the Jauntal for the Langer Berg Tunnel. The exception to this is the relatively short falling drive in the other direction from the Jauntal toward the Granitztal in the Langer Berg Tunnel [1].…”