Rainfall-induced landslides of the flow type are among the most catastrophic natural hazards and the geomechanical modeling of their failure and post-failure stages, based on site conditions and soil mechanical behavior, represents a fundamental issue to assess the failure conditions and recognize the potential for long travel distances of the failed soil masses. As a contribution to the topic, the paper preliminarily discusses the potentialities of the hydro-mechanical coupled GeHoMadrid model to analyze the post-failure stage of rainfall-induced shallow landslides of the flow type using a suitable constitutive model. Then, the model is used to reproduce the experimental evidences of centrifuges tests in both cases of loose and dense soils. The obtained results indicate that the proposed approach is a powerful tool to analyze in a unique framework both the failure and post-failure stages of landslides that can be triggered and accelerate due to specific predispos-ing factors and boundary conditions.

A numerical approach for modeling failure and post-failure stage of rainfall-induced landslides of the flow type

CASCINI, Leonardo;CUOMO, SABATINO;SACCO, CLAUDIA
2012

Abstract

Rainfall-induced landslides of the flow type are among the most catastrophic natural hazards and the geomechanical modeling of their failure and post-failure stages, based on site conditions and soil mechanical behavior, represents a fundamental issue to assess the failure conditions and recognize the potential for long travel distances of the failed soil masses. As a contribution to the topic, the paper preliminarily discusses the potentialities of the hydro-mechanical coupled GeHoMadrid model to analyze the post-failure stage of rainfall-induced shallow landslides of the flow type using a suitable constitutive model. Then, the model is used to reproduce the experimental evidences of centrifuges tests in both cases of loose and dense soils. The obtained results indicate that the proposed approach is a powerful tool to analyze in a unique framework both the failure and post-failure stages of landslides that can be triggered and accelerate due to specific predispos-ing factors and boundary conditions.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/3137648
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