Chapter 11

Hydro-Mechanical Coupling

Eduardo Rojas


The phenomenon of hysteresis during wetting-drying cycles can be simulated by the porous-solid model developed in chapter 3. This model employs the current pore-size distribution of the material. The term “current pore-size distribution” means that the size of pores can be updated as the soil deforms. In that sense, the porous-solid can be used advantageously for the development of fully coupled hydromechanical constitutive models as the influence of the volumetric deformation on the retention curves and effective stresses can be easily assessed. This is done by including some experimental observations related to the behavior of the pore size distribution of soils subjected to loading or suction increase. This methodology avoids using any additional parameter or calibration procedure for the hydro-mechanical coupling of unsaturated soils.

Total Pages: 168-183 (16)

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