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Abstract:	In order to upgrade to the latest safety regulations, a rescue tunnel is being constructed parallel to the existing 12.9 km long, single bore Fréjus Tunnel. A particular challenge to the mechanised tunnel drive is the alignment through squeezing rock mass in places. In order to overcome the squeezing sections, various technical and organisational measures have been implemented during the course of the project. Zur Anpassung an die aktuellen Sicherheitsvorschriften wird parallel zum 12,9 km langen, einröhrigen Fréjus Tunnel ein Rettungsstollen gebaut. Eine besondere Herausforderung ist der Verlauf des maschinellen Vortriebs durch stellenweise drückendes Gebirge. Zur Bewältigung der druckhaften Abschnitte wurden im Laufe des Projekts verschiedene technische und organisatorische Maßnahmen umgesetzt.
Source:	Geomechanics and Tunnelling 7 (2014), No. 6
Page/s:	685-692
Language of Publication:	English/German

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