Analysis On One-dimensional Consolidation Of Non-homogeneous Soils With Consideration Of Non-Darcian Flow Law

The natural clay foundation is heterogeneous in engineering.Meanwhile,non-Darcian seepage phenomenon in clayey soil under low hydraulic gradient also had been recognized gradually.However,the consolidation theory of heterogeneous clayey soil with non-Darcian flow law was rarely reported in literature.In this paper,the consolidation model of non-homogenous foundation under non-Darcian seepage is established by assuming the heterogeneity of the clay foundation and considering the actual time-dependent load,the numerical solutions for this model are obtained by using finite-difference method,then analyzing the consolidation behavior of non-homogenous foundation under non-Darcy seepage.The following research contents are included:1.The governing equations for one dimensional consolidation of clay is developed by considering Hansbo's seepage model in heterogeneous soil with the assumption that the compression modulus changes linearly and nonlinearly with depth and the permeability coefficient remains constant.The solution conditions are obtained by the boundary conditions and initial conditions;the finite difference method is used for solving this question.Finally,influences of parameters m,i₁,?,x and T_vc on consolidation behaviors are analyzed.2.The governing equation for one dimensional consolidation is developed by considering Hansbo's seepage model in heterogeneous soil with the assumption that compression modulus varies linearly and nonlinearly with depth and the permeability coefficient changes nonlinearly with depth.The boundary conditions and initial conditions for the consolidation model is obtained,and validatesthe numerical solutions for this model.Finally,influences of parameters m,i₁,?,x,?,p and T_vc on consolidation behaviors are analyzed.3.The governing equations for one dimensional consolidation of clay is developed by considering threshold hydraulic gradient seepage model in heterogeneous soil with the assumption that the compression modulus changes linearly and nonlinearly with depth and the permeability coefficient remains constant.The solution conditions are obtained by the boundary conditions and initial conditions.Making sure the calculation program is correct and performing the necessary numerical calculations.Finally,influences of parameters i₀,parameters?,x and q_u on the consolidation behaviors are analyzed.4.The governing equations for one dimensional consolidation of clay is developed by considering threshold hydraulic gradient seepage model in heterogeneous soil with the assumption that compression modulus changes linearly and nonlinearly with depth and the permeability coefficient changes nonlinearly with depth.The solution conditions are obtained by the boundary conditions and initial conditions,finite difference method is usedto solve this model.Making sure the calculation program is correct and performing the necessary numerical calculations.Finally,influences of parameters i₀,?,x,?,p and q_u on the consolidation behaviors are analyzed.5.Comparing settlement of soil layer calculated by the consolidation theory with the measured settlement in Changzhou-nanjing highway,practical significances of the consolidation theory deprived in this paper are estimated.