Effect of permeability on the stability conditions of a slope through hydromechanical numerical analyses
Palavras-chave:
slope stability, liquefaction, CASM, permeability ratio, hydromechanical numerical analysisResumo
In this work, data from laboratory tests on an iron tailing was used to calibrate the Clay and Sand Model
(CASM), a critical state constitutive model able to reproduce the undrained softening behavior that can occur in
loose soils. After defining a set of parameters that could reproduce the soil behavior in triaxial compression tests,
a simple slope was simulated with the finite element program PLAXIS 2D to evaluate its hydromechanical
behavior as a function of the imposed flow conditions. For this purpose, different permeability coefficients were
used to evaluate its effect in fully coupled flow deformation analyses. Furthermore, in the case of stratified soil
masses, or in the presence of intercalations of materials with different properties, vertical and horizontal
permeabilities can vary significantly. Therefore, another objective of the work was to evaluate the effect of the
relationship between vertical and horizontal permeabilities on the behavior of the slope, as well as the existence
of materials with different permeabilities.
