One-dimensional Consolidation with a Consideration of Non-Darcy Flow and Self-gravity Stress

Based on the non-linear deformation of saturated clay and the non-Darcy flow in the soil,Terzaghi's one-dimensional consolidation equation was modified and generalized by taking into account of the effects of the buried depth and self-gravity stress of soil layer.The effective stress was set as the dependent variable of the presented nonlinear consolidation equation,and a numerical analysis was made with the finite difference method.The effects of the parameters of the non-Darcy flow,the compressibility index of the soil,the buried depth and the self-gravity stress of soil layer on the consolidation process were investigated respectively.The numerical results indicated that both of the pore pressure dissipation rate and the settlement rate with a consideration of the self-weight stress of soil layer are greater than those without consideration.In addition,they are likely greater than the theoretical values of Terzaghi's theory in the early period of consolidation while possibly less in the following period when all the parameters are taken into account.