Abstract
This chapter presents the modeling of the phenomenon of collapse upon
wetting using the effective stress approach established in Chapter 2 and the
elastoplastic framework for the volumetric behavior of soils proposed in the previous
chapter. Using the probabilistic porous-solid model, Bishop’s parameter can be
obtained to determine 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.