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Abstract:	The ground freezing technique is used not only to stabilise soil but also for sealing excavations and tunnels below groundwater level. As it can be applied in various soil types and controlled very well by temperature measurement, it can be used as a planned measure as well as to remedy leaking excavations. The paper gives an overview of the general function and special features of ground freezing for sealing purposes, and three completed examples are presented. Das Gefrierverfahren wird nicht nur zur Stützung, sondern teilweise auch allein zur Abdichtung von unterirdischen Hohlräumen unter Grundwasser angewendet. Aufgrund seiner großen Anpassungsfähigkeit an unterschiedliche Bodenarten und der guten Kontrollierbarkeit eignet es sich dabei nicht nur für den a priori geplanten Einsatz, sondern auch zur nachträglichen Sanierung undichter Baugruben. Der Bericht behandelt neben der Wirkungsweise und den allgemeinen Merkmalen des Verfahrens die Besonderheiten bei der Verwendung zu Abdichtungszwecken und stellt hierzu drei ausgeführte Fälle vor.
Source:	Geomechanics and Tunnelling 6 (2013), No. 3
Page/s:	246-260
Language of Publication:	English/German

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