Abstract
This chapter presents the modeling of the phenomenon of collapse upon wetting using the effective stress equation and the elastoplastic framework proposed in the previous chapter. The probabilistic porous-solid model is used to obtain Bishop’s parameter X and then compute the current effective stress. The proposed framework includes the hysteresis of the SWRC and to some extent the hydro-mechanical coupling of unsaturated soils. This model is able to reproduce some particularities of the phenomenon of collapse upon wetting that other models cannot simulate.
Keywords: Collapse upon wetting, unsaturated soils, effective stress, elastoplastic framework, yield surface, suction hardening, soil-water retention curve, hysteresis, hydro-mechanical coupling, porous-solid model, Bishop’s effective stress equation, compacted soils, neutral loading, suction controlled tests, preconsolidation stress.
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