Modélisation numérique de la formation d'un fontis à l'aide du code de calcul UDEC : influence de la stratification et de la rigidité de la couche exploitée

Abstract : The sinkholes can be at the origin of more or less significant damage according to their dimensions, of the nature of the grounds in which they occur and of the occupation of the ground. Their forecast is often based on practice codes and the experience feedback. We sought to simulate the mechanism of rupture and to envisage the shape of the bell, which results its propagation towards surface. A modelling is led, by the method of the distinct elements (UDEC), and based on observations. It was implemented on a real case, careers of the Paris Basin, and is based on a methodology of progressive generation of the fractures in the strata of covering. For better understanding this complex phenomenon, a study of sensitivity of the formation of the subsidence was carried out. It relates to the density of the stratification and the rigidity of the worked seam. This study confirms that methodology suggested constitutes a useful method of prediction of the phenomenon sinkholes formation.
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Attalah Abbass Fayad, Marwan Al Heib, Christophe Didier. Modélisation numérique de la formation d'un fontis à l'aide du code de calcul UDEC : influence de la stratification et de la rigidité de la couche exploitée. International Conference on geotechnical engineering, May 2004, Beyrouth, Liban. pp.199-205. ⟨ineris-00976149⟩

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