非饱和土一维大变形固结模型

基于分段线性差分法，建立了一种非饱和土一维大变形固结模型。该模型可考虑土性参数非线性变化，可计算与分析大变形问题，并编制了Fortran计算程序。在现有解答和试验数据的基础上，对该模型进行了验证，瞬时加载情况下模型数值解与现有解答基本吻合，考虑加载过程下的数值解与试验数据吻合。进行了大变形算例分析，对比了加荷压密与消散固结阶段土层变形，探讨了孔隙气、水渗透系数比对土层沉降量、饱和度和不同应变情况下固结度的影响规律，分析了非饱和土大、小变形固结理论计算孔隙水（气）压和沉降量的差异。

A one-dimensional consolidation model considering large strain for unsaturated soil

This paper presents a model developed for one-dimensional consolidation of unsaturated soil. This model uses the piece-linear finite difference approach and considers soil nonlinearity and large strain problems. Fortran programming package is used to implement the computation of the model. This model is verified by analytical solutions and experimental results. The numerical solution of this model agrees with the existing solutions in the case of instantaneous loading. In process of loading, the approximation of consolidation settlement obtained by this model is in good agreement with the test results. Then this model is implemented for a large strain consolidation. The case study compares the settlement occurred at the instantaneous deforming stage and the subsequent consolidation stage. The case study also investigates the effect of the pore air permeability to the hydraulic conductivity ratio on soil layer settlement, saturation degree, and consolidation degree of different strain. It also analyzes the difference of pore water (air) pressures and soil layer settlement on large and small deformation consolidation theory of unsaturated soil.