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Analysis of the Slope Response to an Increase in Pore Water Pressure Using the Material Point Method

Department of Civil Engineering, University of Calabria, Rende, 87036 Cosenza, Italy
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Water 2019, 11(7), 1446; https://doi.org/10.3390/w11071446
Received: 29 May 2019 / Revised: 29 June 2019 / Accepted: 9 July 2019 / Published: 12 July 2019
(This article belongs to the Special Issue Water-Induced Landslides: Prediction and Control)
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Abstract

Traditional numerical methods, such as the finite element method or the finite difference method, are generally used to analyze the slope response in the pre-failure and failure stages. The post-failure phase is often ignored due to the unsuitability of these methods for dealing with problems involving large deformations. However, an adequate analysis of this latter stage and a reliable prediction of the landslide kinematics after failure are very useful for minimizing the risk of catastrophic damage. This is generally the case of the landslides triggered by an excess in pore water pressure, which are often characterized by high velocity and long run-out distance. In the present paper, the deformation processes occurring in an ideal slope owing to an increase in pore water pressure are analyzed using the material point method (MPM) that is a numerical technique capable of overcoming the limitations of the above-mentioned traditional methods. In particular, this study is aimed to investigate the influence of the main involved parameters on the development of a slip surface within the slope, and on the kinematics of the consequent landslide. The obtained results show that, among these parameters, the excess water pressure exerts the major influence on the slope response. A simple equation is also proposed for a preliminary evaluation of the run-out distance of the displaced soil mass. View Full-Text
Keywords: landslide; excess pore water pressure; post-failure stage; run-out distance; material point method landslide; excess pore water pressure; post-failure stage; run-out distance; material point method
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Troncone, A.; Conte, E.; Pugliese, L. Analysis of the Slope Response to an Increase in Pore Water Pressure Using the Material Point Method. Water 2019, 11, 1446.

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