中文摘要：

重塑黏土渗透系数是岩土工程众多领域中的一个重要参数,分析其主要影响因素并提出简单实用的定量表达式有着重要的理论价值及工程应用前景。已有的渗透系数预测方法或者由于参数复杂,或者由于适用范围窄、精度低,不能很好地得到应用。收集了已有不同文献23组液限变化范围为40%～300%的重塑黏土的固结渗透试验数据,通过分析指出了土体压缩过程中当应变大于20%时渗透系数对数值与孔隙比成非线性指数关系而非线性关系,明确了已有渗透系数预测方法的主要缺陷。采用多元线性回归分析方法,揭示了影响黏土渗透系数的主要影响因素,提出了适用范围广、参数简单的渗透系数定量计算表达式。

英文摘要：

The difficulty in measuring the permeability of clays with enough accuracy enhances the importance of quantitatively predicting the permeability with simple physical parameters.This study collects 23 groups of data of permeability of remolded clays considering the effect of oedometer consolidation pressure.The investigated clays cover a wide range of liquid limits,varying from 40% to 300%.Based on the data of permeability,it is found that the logarithm of permeability coefficient changes with the void ratio in the exponential form,other than in the linear relationship,especially when the volumetric strain reaches the level of 20%.The controlling factors of the permeability coefficient of clays are analysed by multiple regression analysis.A simple method is also proposed for predicting the permeability coefficient,which can be applied to remolded clays with wide ranges of liquid limit and void ratio.