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Author(s):	Benedikt, Johannes; Berger, Klaus; Koinig, Josef
Title:
Abstract:	The St. Kanzian tunnel chain lies near the Völkermarkt reservoir and is part of the Mittlern-Althofen approval section of the Koralmbahn line in Carinthia. Of the six tunnels in the St. Kanzian tunnel chain, the 495 m long Kühnsdorf green tunnel (cut-and-cover) has already been completed. The construction of the 230 m long Peratschitzen green tunnel (a cut-and-cover noise protection tunnel) and the 620 m long Srejach Tunnel (top-down construction) started in summer 2015. Work should start on the Untersammelsdorf, Stein and Lind Tunnels (all mined tunnels), in spring/summer 2016. The tunnels lie partially in challenging geological conditions (lacustrine sediments), all with shallow overburden, and require special measures for support and ground improvement (bored piles, jet grouting). Particular attention has been paid to later maintenance costs, which have to be considered in the course of the design work. Die Tunnelkette St. Kanzian liegt im Bereich des Völkermarkter Stausees und ist Bestandteil des Einreichabschnitts Mittlern-Althofen im Westteil der Koralmbahn in Kärnten. Von den sechs Tunneln der Tunnelkette St. Kanzian ist der 495 m lange Grüntunnel Kühnsdorf (offene Bauweise) bereits fertiggestellt. Die Herstellung des 230 m langen Grüntunnels Peratschitzen (offene Bauweise) und des 620 m langen Tunnels Srejach (Deckelbauweise) hat im Sommer 2015 begonnen. Mit den Tunneln Untersammelsdorf, Stein und Lind (alle geschlossene Bauweise) soll im Frühjahr/Sommer 2016 begonnen werden. Die Tunnelbauwerke liegen teilweise in herausfordernden geologischen Verhältnissen (Stillwassersedimente) mit durchwegs geringer Überlagerung und erfordern besondere Maßnahmen zur Stützung und Baugrundverbesserung (Bohrpfähle, Düsenstrahlverfahren). Besonderes Augenmerk wurde auf die späteren Erhaltungskosten gelegt, die in den Planungsentscheidungen berücksichtigt wurden.
Source:	Geomechanics and Tunnelling 8 (2015), No. 6
Page/s:	535-546
Language of Publication:	English/German

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