Towards a Unified Soil Mechanics Theory: The Use of Effective Stresses in Unsaturated Soil, Revised Edition

Towards a Unified Soil Mechanics Theory: The Use of Effective Stresses in Unsaturated Soil, Revised Edition

With the application of the effective stress concept, the strength and volumetric behavior of saturated materials was clearly understood. For the case of unsaturated materials, a universally accepted ...
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Collapse Upon Wetting

Pp. 123-141 (19)

Eduardo Rojas

Abstract

This chapter presents the modeling of the phenomenon of collapse upon wetting using the effective stress equation established in Chapter 2 and the elastoplastic framework proposed in the previous chapter. Using the probabilistic porous-solid model, Bishop’s parameter χ 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:

Bishop’s effective stress equation, Collapse upon wetting, Compacted soils, Effective stress, Elastoplastic framework, Hydro-mechanical coupling, Hysteresis, Neutral loading, Porous-solid model, Preconsolidation stress, Soilwater retention curve, Suction controlled tests, Suction hardening, Unsaturated soils, Yield surface.

Affiliation:

Universidad Autonoma de Queretaro Mexico.