Unsteady Oscillations of a Liquid-Saturated Poroelastic Soil Layer

The paper is concerned with the problem of unsteady oscillations of a liquid-saturated poroelastic medium layer governed by the system of the Biot's differential equations. The finite-element method is used for numerical determination of dynamic displacements of the solid and liquid phases, pore pressure and effective stresses in the solid phase. The numerical analysis of the single-axis loading of a poroelastic liquid-saturated soil layer is performed, the effects of interaction between the phases in the layer are studied at various values of the permeability parameter. The numerical results presented in the paper suggest that the consolidation process slows down with decreasing the medium's permeability; in the case of a high permeability material, the appreciable oscillation damping is observed.