Study of a lateral spread failure in an eastern Canada clay deposit in relation with progressive failure : the Saint Barnabé-Nord slide

• A review of the concept of progressive failure in the context of slope stability and an application of this concept to a spread failure in an eastern Canada clay deposit have been made in the search of a better understanding of the role of progressive failure in this type of mass movement. The study led to the identification of two failure modes for lateral spread failures. In the first one, the disturbing agent is located up slope (e.g. presence of a fill on top of the slope) resulting in an increase of earth pressure and possibly entailing a passive failure. In the second one, the disturbing agent is located down slope (e.g. river erosion at the toe of a slope) causing a decrease of earth pressure and possibly an acctive failure. The application of progressive failure to a lateral spread failure in clay has therefore enabled the development of new ideas regarding the failure mechanism in large landslides where limit equilibrium stability analysis is not applicable.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Samhällsbyggnadsteknik -- Infrastrukturteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Civil Engineering -- Infrastructure Engineering (hsv//eng)

Keyword

Structural Engineering

Konstruktionsteknik

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