Shear strength of ice-filled rock joints

GUNZEL, FRIEDERIKE (2008) Shear strength of ice-filled rock joints In: Proceedings of the 9th international conference on permafrost, 29 Jun - 03 Jul 2008, Fairbanks, Alaska, USA, 29 June - 3 July, 2008.

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Abstract

Ice-filled rock joints are a common feature of high mountain permafrost areas. Warming of these joints in rock can lead to instabilities and rockfall events. In the following study, a series of direct shear tests was performed with artificial samples simulating ice-filled rock joints. The direct shear tests were carried out in two testing modes: constant strain and constant stress. In constant stress tests, the ice-filled joints show a parabolic relationship between normal stress and shear stress unlike the linear relationship usually found in mineral filled rock joints (Barton 1974). Constant stress tests were also conducted in which the samples were allowed to warm up until failure occurred while a constant normal stress and a constant shear test were applied. Different failure modes could be identified, either driven by breaking the connection of ice and concrete or ductile deformation of the ice or a combination of both.

Item Type:Contribution to conference proceedings in the public domain ( Full Paper)
Additional Information:© 2008 Institute of Northern Engineering, University of Alaska, Fairbanks
Uncontrolled Keywords:direct shear; ice strength; rock joints; shear strength
Subjects:H000 Engineering > H200 Civil Engineering
H000 Engineering > H200 Civil Engineering > H220 Environmental Engineering
Faculties:Faculty of Science and Engineering > School of Environment and Technology > Ground water and structural engineering
Faculty of Science and Engineering > School of Environment and Technology
ID Code:5798
Deposited By:Converis
Deposited On:11 Mar 2010
Last Modified:22 Feb 2013 09:39

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