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Progressive failures in eastern Canadian and Scandinavian sensitive clays
Département de Génie Civil, Université Laval, Pavillon Adrien-Pouliot.
Département de Génie Civil, Université Laval, Pavillon Adrien-Pouliot.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
Ministere des Transports du Quebec.
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2011 (English)In: Canadian geotechnical journal (Print), ISSN 0008-3674, E-ISSN 1208-6010, Vol. 48, no 11, p. 1696-1712Article in journal (Refereed) Published
Abstract [en]

Observations from past events are used to show that the concept of progressive failure may explain translational progressive landslides and spreads — large landslides occurring in sensitive clays. During progressive failure, the strain-softening behaviour of the soil causes unstable forces to propagate a failure surface further in the slope. Translational progressive landslides generally take place in long, gently inclined slopes. Instability in a steeper upslope area is followed by redistribution of stress, which increases earth pressure further downslope. Passive failure may therefore occur in less-inclined ground, heaving the soil. Spreads are usually trigged by erosion of a deposit having a higher angle near the toe. Instability starts near the toe of the slope and propagates into the deposit, reducing earth pressure. This may lead to the formation of an active failure with dislocation of the deposit into horsts and grabens. The failure mechanism of both types of landslides is controlled by the stresses in the slope and the stress–strain behaviour of the soil. The mechanism presented explains the sensitivity of a slope to minor disturbances and the resulting high retrogressions observed for such landslides in Scandinavia and eastern Canada.

Place, publisher, year, edition, pages
2011. Vol. 48, no 11, p. 1696-1712
Keywords [en]
Civil engineering and architecture - Building engineering, Civil engineering and architecture - Geoengineering and mining engineering
Keywords [sv]
Samhällsbyggnadsteknik och arkitektur - Byggnadsteknik, Samhällsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-15006DOI: 10.1139/t11-059ISI: 000298208200009Scopus ID: 2-s2.0-80455143371Local ID: e76d5802-8fcc-42b4-82ec-798b4afc3a68OAI: oai:DiVA.org:ltu-15006DiVA, id: diva2:987979
Note
Validerad; 2011; 20111101 (stiber)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Bernander, Stig

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