Permeability coefficient is derived from field SWCC, which is of significance for actual engineering.
从土-水特征曲线还能获知非饱和膨胀土的渗透参数，对工程具有一定的指导意义。
A equation was used to fit the data of SWCC, and the relation between fitting parameters and dry density was studied.
通过水分特征曲线方程对试验数据的拟合，研究了拟合参数随干密度的变化情况。
Combined with the fitting parameters obtained from the VG model, the effects of mineral composition and pore structure of the soil on SWCC are analyzed.
结合VG模型拟合的参数，着重分析了矿物成分和孔隙结构对膨胀土土水特征曲线的影响。
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