The Hydromechanical Interplay in the Simplified Three-dimensional Limit Equilibrium Analyses of Unsaturated Slope Stability

Panos Sitarenios, Francesca Casini

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Abstract

The paper presents a three-dimensional slope stability limit equilibrium solution for translational, planar failure modes. The proposed solution uses Bishop’s average skeleton stress combined with the Mohr – Coulomb failure criterion to describe soil strength evolution under unsaturated conditions while its formulation ensures a natural and smooth transition from the unsaturated to the saturated regime and vice versa. The proposed analytical solution is evaluated by comparing its predictions with the results of the Ruedlingen slope failure experiment. The comparison suggests that despite its relative simplicity the analytical solution can capture well the experimentally observed behaviour and highlights the importance of lateral resistance consideration together with a realistic interplay between mechanical parameters (cohesion) and hydraulic (pore water pressure) conditions.
Original languageEnglish
Article number73
Number of pages15
Journalgeosciences
Volume11
Issue number2
Early online date8 Feb 2021
DOIs
Publication statusE-pub ahead of print - 8 Feb 2021

Bibliographical note

Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Keywords

  • unsaturated slope
  • Ruedlingen field experiment
  • lateral resistance
  • limit equilibrium solution

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