FEniCS simulation of a partially saturated slope under varying environmental loads
Paper i proceeding, 2023

This paper presents a numerical simulation of the response of a partially saturated slope under the impact of a long heavy rainfall event. The results are shown as a chart of varying safety factor over time. The powerful FEniCS finite element framework is employed to solve the governing coupled Hydro-Mechanical (HM) balance equations. An extended version of the Mohr-Coulomb failure criterion that accounts for partial saturation is implemented in Fortran and called from within FEniCSscript to carry out the stress integration and plastic correction. The safety calculations are performed using the strength reduction technique, firstly using Bishop’s effective stress, and secondly using two independent stress measures (i.e., net stress and suction). The impact of the chosen stress measures on the results is briefly discussed. The results highlight the importance of considering the unsaturated soil behaviour in the estimation of the safety margin, and to answer the important question of when and where the failure might occur.

FEniCS

FEM

Coupling.

Slope stability

Unsaturated soil

Författare

Ayman Abed

Chalmers, Arkitektur och samhällsbyggnadsteknik, Geologi och geoteknik

Eleni Gerolymatou

Technischen Universität Clausthal

Minna Karstunen

Chalmers, Arkitektur och samhällsbyggnadsteknik, Geologi och geoteknik

10th European Conference on Numerical Methods in Geotechnical Engineering
London, United Kingdom,

Ämneskategorier

Geoteknik

DOI

10.53243/NUMGE2023-269

Mer information

Senast uppdaterat

2023-08-14