In the past decades, flow-like catastrophic landslides caused many victims and important economic damage around the world. It is therefore important to predict their path, velocity and depth in order to provide adequate mitigation and protection measures. This paper presents a model that incorporates coupling between pore pressures and the solid skeleton inside the avalanching mass. A depth-integrated, coupled, mathematical model is derived from the velocity–pressure version of the Biot–Zienkiewicz model, which\ud is used in soil dynamics. The equations are complemented with simple rheological equations describing soil behaviour and are discretized using the SPH method. The accuracy of the model is assessed using a series of benchmarks, and then it is applied to back-analyse the propagation stage of some catastrophic flow-like slope movements for which field data are available

No abstract

No abstract

No abstract

No abstract

This paper deals with a simple yet effective model which can be used for prediction of propagation of fast catastrophic landslides. The main ingredients are: i) a hierarchical set of mathematical models describing the coupled behaviour between solid skeleton and pore fluids. Here we will arrive to a coupled depth integrated model; ii) a rheological model describing the behaviour of the fluidized soil; iii) a numerical model to discretize mathematical and rheological models. The model performance has been assessed using a set of benchmark tests, including some provided by the Hong Kong Geotechnical Engineering Office. RÉSUMÉ. Cet article traite d'un modèle simple mais efficace qui peut être utilisé pour prédire la propagation des glissements de terrains rapides. Le modèle se base sur (i) un ensemble hiérarchique de modèles mathématiques qui décrivent l'interaction du solide avec le fluide interstitiel et qui aboutissent à un modèle intégré en profondeur.(ii) Un modèle rhéologique décrivant le comportement des sols fluidifiés, et (iii) un modèle numérique pour discrétiser les modèles mathématique et rhéologique. Les performances du modèle ont été évaluées utilisant un ensemble de benchmarks dont quelques un ont été fournis par l'organisme Hong Kong Geotechnical Engineering Office.

No abstract

No abstract