A new constitutive model for cemented unsaturated soils: model performance and stability analysis
A new constitutive model for cemented unsaturated soils: model performance and stability analysis
The paper presents a new single-surface isotropic hardening elastoplastic model for unsaturated cemented soils formulated within the critical state soil mechanics framework. This model, called the WR2-Unsat model, is an extension to unsaturated conditions of a recently proposed constitutive law for structured soils. The model performance is analysed by numerically simulating a few water-undrained triaxial tests on an ideal fine-grained soil, emphasizing as the changes in pore saturation and the breakage of cementation bonds can cause the occurrence of potential instabilities. The numerical study is supported by a theoretical analysis of soil stability, aimed at providing simple stability criteria for foreseeing the occurrence of potential instabilities.
Giada Maria Rotisciani; A. Desideri; Angelo Amorosi
10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)
1. Constitutive modelling for saturated and unsaturated soils
https://doi.org/10.53243/NUMGE2023-319
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