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Author(s):	Hellmich, Christian; Pichler, Bernhard; Heissenberger, Roman; Moritz, Bernd
Title:
Abstract:	Quantification of the level of loading of shotcrete supports from measured displacements of NATM-driven tunnels is common practice in Austria. At construction sites of the Austrian Federal Railways (OeBB), a hybrid method developed at the TU Wien (Vienna University of Technology) has been successfully applied over the last 15 years. Because OeBB tunnels are designed for a lifetime of 150 years, the long-term reliability of the support structures is of paramount interest. This provides the motivation for the development of hybrid methods applicable during the entire service life of tunnels, including also inner linings and segmental linings. The required extensions are intended to be carried out within a research program. The paper describes the state-of-the-art and projected future developments. In Österreich ist es üblich, im Rahmen der Neuen Österreichischen Tunnelbaumethode (NÖT) die Auslastung von Spritzbetonschalen während des Baufortschrittes anhand gemessener Verschiebungen zu quantifizieren. Dazu wurde auf den Tunnelbaustellen der ÖBB Infrastruktur AG in den letzten fünfzehn Jahren eine an der Technischen Universität Wien entwickelte hybride Methode erfolgreich angewendet. Da ÖBB-Tunnel für eine Lebensdauer von 150 Jahren ausgelegt werden, ist die langfristige Zuverlässigkeit der Tunnelausbauten von größtem Interesse. Dies motiviert die Entwicklung von hybriden Methoden für die gesamte Lebensdauer von Tunneln, zwecks Auslastungsbestimmung sämtlicher Auskleidungen, etwa auch Ortbeton-Innenschalen oder Tübbingen. Dazu befindet sich ein eigenes Forschungsprogramm in Ausarbeitung. Der vorliegende Beitrag beschreibt den Stand der Technik und die geplanten zukünftigen Entwicklungen.
Source:	Geomechanics and Tunnelling 13 (2020), No. 5
Page/s:	538-546
Language of Publication:	English/German

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