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Author(s):	Pircher, Johannes; Pacher, Wolfgang; Neugschwandtner, Erich
Title:
Abstract:	The Tiwag - Tiroler Wasserkraft AG - is replacing the entire fall to the powerhouse at the Kaunertal power station, which has been in operation for about 50 years, in 2012 to 2015. The new facilities are being constructed entirely underground in unusually difficult geology for high-pressure systems. Works to construct the 4,000 m of tunnels and shafts started in March 2012 and were completed by the middle of June 2013. Part of the construction work is based on the proven NATM and part is based on the modern technology of mechanised tunnelling. After the completion of the caverns, the core of the new system, the 1,430 m long penstock, will be lined with thick-walled steel armouring and backfilled with concrete. Die Tiwag - Tiroler Wasserkraft AG errichtet in den Jahren 2012 bis 2015 einen neuen Kraftabstieg für das seit rund 50 Jahren in Betrieb befindliche Kaunertalkraftwerk. Die Anlagenteile des neuen Kraftabstiegs werden vollständig unter Tage in einer für Hochdruckanlagen untypisch schwierigen Geologie hergestellt. Mit den Vortriebsarbeiten für die gesamt 4.000 m langen Stollen und Schächte wurde im März 2012 begonnen; im Juni 2013 wurden diese erfolgreich abgeschlossen. Bei den Bauverfahren hat man dabei einerseits auf die bewährten Methoden der NÖT und andererseits auf die moderne Technik des maschinellen Vortriebs gesetzt. Nach Fertigstellung der Felshohlraumbauten wird das Kernstück des neuen Kraftabstiegs, der 1.430 m lange Druckschacht, mit einer dickwandigen Panzerung ausgekleidet und hinterbetoniert.
Source:	Geomechanics and Tunnelling 6 (2013), No. 5
Page/s:	594-602
Language of Publication:	English/German

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