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Etude du glissement du Bouffay (5 août 1981) : réflexions en vue de la prévision et de la prévention

Abstract : The slump of Le Bouffay is one of the movements that occures in the cliffs of the Bessin (Calvados-France). On the 5th of August 1981, at 20 h 05, 1,5 million m3 slip. They are made with marls of Port, limestones of the Besin and clayx and sandstones of the Planet. They form a collapsed part behind an horizontal moved one that lifts and shears the strand. Calculations of stability are made on two models : one model of "poussée et butée" (push and thrust ?) and one model by the methode of perturbations on a non circular slip plane. They prove that the security coefficient F decreases of 3 to 5 % when the foot of the cliff moves 5 m backwards. Several studies are necessary to foresee and prevent new slips.
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https://hal-amu.archives-ouvertes.fr/hal-01545329
Contributor : Jean-Louis Ballais <>
Submitted on : Thursday, June 22, 2017 - 3:03:40 PM
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Olivier Maquaire, Patrick Gigot, Jean-Louis Ballais. Etude du glissement du Bouffay (5 août 1981) : réflexions en vue de la prévision et de la prévention. Jean-Claude Flageollet. Documents du B.R.G.M., 83, B.R.G.M., pp.29-40, 1984. ⟨hal-01545329⟩

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