Granitztal tunnel chain – Experience from the construction of the Langer Berg Tunnel and challenges in the anhydrite zone: Tunnelkette Granitztal – Nachlese zu dem Tunnelvortrieb Langer Berg und Herausforderungen im Anhydritbereich. Issue 6 (28th November 2017)

• Record Type: Journal Article
• Authors: Gschwandtner, Gunter G.; Kahn, Ursula; Kohlböck, Bernhard; Moritz, Bernd; Wagner, Stefan
• Is Part Of: Geomechanik und Tunnelbau. Volume 10:Issue 6(2017:Dec.)
• Page Start: 730
• Page End: 739
• Publication Date: 2017-11-28
• Subjects: infrastructure project -- NATM -- geology -- geotechnical engineering -- inner lining -- anhydrite; Infrastrukturprojekt -- NÖT -- Geotechnik -- Geologie -- Innenschale -- Anhydrit; Railway tunnels -- Conventional tunnelling -- Geology; Eisenbahntunnel -- Konventioneller Vortrieb -- Geologie; Engineering geology -- Periodicals; Soil mechanics -- Periodicals; Rock mechanics -- Periodicals; Tunneling -- Periodicals; 624.151
• DOI: 10.1002/geot.201700042
• Languages: English
• ISSNs: 1865-7362

Abstract

Abstract: The Granitztal tunnel chain is located south of the Koralm Tunnel and includes the Deutsch Grutschen and Langer Berg Tunnels, which are being excavated using the New Austrian Tunnelling Method (NATM). The Langer Berg Tunnel was excavated in a rock mass containing sulphate over a length of approximately 330 m. Despite extensive exploration during site investigation of the project and the documentation from the construction of the existing Langer Berg Tunnel, which is located in the same rock mass series, unexpected anhydrite layers where found within the sulphate rock mass. In addition to a general overview of the project, the following article describes the geological and geotechnical conditions in the anhydrite rock mass as well as the adjustment of the design and implementation during construction due to the unexpectedly encountered situation.