Analyzing the role of soil water retention curve in slope stability for differently structured soils

Elisa Arnone, Leonardo Noto, Chiara Antinoro

Research output: Contribution to conferenceOther

Abstract

 We analyzed the mechanical and hydrological effects of soil water retention curve (SWRC) models on theslope stability analyses of soils with unimodal and bimodal behavior. We used three different SWRC models, two bimodal models (Ross&Smettem and Dexter) vs. the traditional vanGenuchten model, to evaluate the Factor of Safety (FS) of a simple designed hillslope, based on the Bishopapproach for unsaturated soils. Two formulations for term were also considered. Results indicate that in cases of clayey soils, changes in FS obtained with different SWRC models especially atsoil moisture values within the residual zone. In sandy soils the choice of formulations can be moreimportant. The variation decreases as the slope conditions get worse, i.e. slope angle increases or frictionangle decreases
Original languageEnglish
Number of pages1499
Publication statusPublished - 2016

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