Modelling of Soils by Use of the Theory of Porous Media

摘要

The continuum mechanical description of cohesive and non-cohesive soil materials is one of the main topics in geomechanical engineering. In the present contribution, saturated and unsaturated soils are investigated within the framework of the Theory of Porous Media using a standard binary model of a materially incompressible solid skeleton and a materially compressible or incompressible pore-fluid. The soil skeleton is assumed as a cohesive-frictional elasto-plastic material, whereas the viscous pore-fluid can be water, air or a water-air mixture. Furthermore, the fluid flow is governed by Darcy's filter law including a deformation dependent permeability. Finally, a numerical example of a strongly coupled solid-fluid-problem is carried out by the finite element method.