Dynamics of deformation and water flow in heterogeneous porous media and its impact on soil properties

摘要: The interaction of geomechanics and flow within a soil body induces deformation pore pressure change. Deformation may change hydrogeological elastic properties, which alters the mechanical behaviour results in non-linearity. To investigate this effect heterogeneous porous medium, stochastic poroelastic model is proposed. Monte Carlo simulations are performed to determine mean uncertainty parameter changes, displacement, water pressure. Hydraulic conductivity treated as only random variable coupled geomechanics-flow system due its large variation compared other properties natural environments. three considered non-linear models for between parameters those that consider (1) porosity hydraulic conductivity; (2) Young's modulus; (3) combined includes porosity, conductivity, modulus. Boundary effects on also explored. relationships changes modulus analytically shown be non-linear. Among parameters, largest reduction conductivity. deformation-induced shows most significant variance while have least effect. When considered, superposition relationship does not exist displacement scenarios considered; it exists case without effects. causes effective whole domain. scenario considers both loading discharge boundaries has larger geo-mechanical than separately. indicate profound system. should thus modelling practice. Copyright © 2009 John Wiley & Sons, Ltd.