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Effect of bedrock shape and drainage properties on the stability of slopes
Institute for Geotechnical Engineering, Swiss Federal Institute of Technology, ETH Zurich.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering. Institute for Geotechnical Engineering, Swiss Federal Institute of Technology, ETH Zurich.ORCID iD: 0000-0003-1935-1743
Institute for Geotechnical Engineering, Swiss Federal Institute of Technology, ETH Zurich.
Number of Authors: 32014 (English)In: Physical Modelling in Geotechnics - Proceedings of the 8th International Conference on Physical Modelling in Geotechnics 2014, ICPMG 2014, 2014, Vol. 2, p. 1211-1217Conference paper, Published paper (Refereed)
Abstract [en]

Rainfall induced slope failures were investigated in a series of centrifuge tests on slopes underlain by different bedrock profiles. These tests were designed to interpret observations made during two full scale landslide triggering experiments, focusing on the effect of hydro-mechanical interactions between a soil layer and bedrock during rainfall events. A climate chamber was designed and constructed for the ETH Zurich geotechnical drum centrifuge (Springman et al. 2001). Two different bedrock profiles were tested. The bedrock was parallel to the slope surface as the benchmark, whereas a convex form was placed at the toe of the slope in the alternative, which has potential to act as a supporting buttress. The changes in the pore pressures at the interface of the soil and bedrock were measured. Moreover, the surface movements were monitored by means of cameras installed in the climate chamber. The hydraulic and mechanical responses of the slopes suggested that a convex form of bedrock at the toe might have a "buttressing" effect to the upper parts of the slope due to arching. Moreover, this stabilising effect would be more pronounced if an efficient drainage system was in place behind the buttress to drain locally high pore pressures. © 2014 Taylor & Francis Group.

Place, publisher, year, edition, pages
2014. Vol. 2, p. 1211-1217
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-29357Scopus ID: 2-s2.0-84890072652Local ID: 2ce93a58-03d7-47a6-a2a6-1928ac394982ISBN: 9781138022225 (print)OAI: oai:DiVA.org:ltu-29357DiVA, id: diva2:1002580
Conference
International Conference on Physical Modelling in Geotechnics, ICPMG 2014 : 14/01/2014 - 17/01/2014
Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

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Laue, Jan

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