原状黄土及重塑黄土渗透特性的试验研究

Experimental Investigation of Permeability Characteristics of Intact and Reshaped Loess

为了研究干密度对黄土渗透系数的影响以及原状黄土渗透系数随时间的变化规律，对石太客运专线西段所取原状黄土和重塑黄土分别进行了饱和渗透试验。试验结果表明，该黄土的渗透系数随着干密度的不同，一般在（10^-4-10^-6）cm/s之间变化，原状黄土的渗透系数随渗透时间的延长而呈减小的趋势，原状黄土扰动重塑后微结构破坏，干密度的变化对渗透系数影响较大，并且随着干密度的增加呈减小的趋势。

In order efficient of intact loess c to study the influence of dry density on penetration hanges along with time, the saturated permeability coefficient as well as permeability cotest is carried out separately for intact and reshaped loess in western section of Shijiazhuang-Taiyuan passenger dedicated line. The result shows that： along with the dry density difference, the permeability coefficient of loess may change between （ 10^-4 - 10^-6 ） cm/s. The permeability coefficient of intact loess assumes a decreasing tendency along with penetration time extension. The intact loess microstructure is destroyed after disturbance and remodeling, and dry density changes have a significant impact on penetration coefficient, which tends to decrease while the dry density increases.