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.