23-25 September 2013
GEOMAR East shore
Europe/Berlin timezone
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Weak layers: their definition and classification from a geotechnical perspective

Presented by Prof. Jacques LOCAT on 23 Sep 2013 from 12:00 to 12:15
Type: Oral presentation, full-paper
Track: Oral presentations

Content

Weak layers play a major role in the development of many large submarine landslides. A definition of a weak layer is proposed here using a geotechnical perspective: a layer (or band) consisting of sediment or rock that has strength potentially or actually sufficiently lower than that of adjacent units (strength contrast) to provide a potential focus for the development of a surface of rupture. Such a layer or a band can follow stratigraphic horizons, but this is not a requirement. From this it is proposed to define two types: inherited and induced weak layers. In addition, weak layers can develop in strain softening sediments where progressive failure can generate a surface of rupture without the need to invoke the role of excess pore pressures.

Place

Location: GEOMAR East shore
Address: Wischhofstr. 1-3 / D-24148 Kiel
Room: Lecture Hall Geb. 8A

Primary authors

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Co-authors

  • Serge LEROUEIL Laboratoire d'etudes sur les risques naturels, Université Laval, Quebéc, Canada
  • Ariane LOCAT Laboratoire d'etudes sur les risques naturels, Université Laval, Quebéc, Canada
  • Homa LEE USGS, Menlo Park, CA, USA
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