Run-out of landslides in brittle soils

摘要: One of the factors causing acceleration landslides is loss strength soil involved in potential unstable mechanism. The travelled distance and landslide velocity, a key factor risk analysis, will be determined by resistant forces. Brittle behaviour, commonly associated with cemented soils, overconsolidated plastic clay formations sensitive clays, lead to progressive failure phenomenon explained reduction increasing strain. In present study, this has been analysed case saturated slope which becomes boundary pore water pressure. A Mohr-Coulomb model strain softening behaviour induced deviatoric used. paper focusses not only on stability but also post (run-out sliding velocity). coupled hydro-mechanical formulation material point method used simulate whole instability process. influence brittleness triggering run-out evaluated means parametric study varying peak residual strength. onset geometry are controlled both values. Good correlations between run-outs found. decay determines distance.