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Author(s):	Wagner, H.; Handke, D.; Matter, J.; Fabbri, D.; Keiper, K.
Title:
Abstract:	The Koralm tunnel forms the central part of the route of the Koralmbahn railway from Graz to Klagenfurt in the section Deutschlandsberg- St. Andrä. The tunnel, split into three construction contracts (KAT 1,2 and 3) connects the federal states of Carinthia and Styria in Austria with a length of 32.8 km. Continuous tunnelling is intended for the section through the central mountain complex of the Koralpe. The very variable geological conditions (rock and loose ground sections, overburden of up to approx. 1,200 m, possible high water pressures and pronounced zones of faulting and fracturing) represent a major challenge for the implementation of mechanical tunnelling (tunnelling, lining and logistics concepts). The present article discusses the geological and hydrogeological conditions as well as the basic concepts for support and machine system and the particular measures to overcome squeezing rock conditions. Der Koralmtunnel bildet das zentrale Trassenstück der Koralmbahn Graz-Klagenfurt im Abschnitt Deutschlandsberg-St. Andrä. Der in drei Baulose (KAT 1, 2 und 3) gegliederte Tunnel verbindet auf einer Gesamtlänge von 32,8 km die Bundesländer Steiermark und Kärnten in Österreich. Für die Durchörterung des zentralen Gebirgskomplexes der Koralpe sind kontinuierliche Vortriebe vorgesehen. Die stark wechselnden geologischen Randbedingungen (Fest- und Lockergesteinsabschnitte, Überlagerungen bis ca. 1.200 m, mögliche hohe Wasserdrücke sowie ausgeprägte Störungs- und Zerrüttungszonen) stellen höchste Anforderungen an die Realisierung des Maschinenvortriebs (Vortriebs-, Ausbauund Logistikkonzept). Im vorliegenden Beitrag werden die geotechnischen und hydrogeologischen Randbedingungen analysiert sowie die Grundkonzepte für Ausbausicherung und Maschinensystem und die besonderen Vorkehrungen zur Bewältigung der druckhaften Gebirgsverhältnisse vorgestellt.
Source:	Geomechanics and Tunnelling 2 (2009), No. 5
Page/s:	601-611
Language of Publication:	English/German

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