重塑黄土渗透系数的试验研究

Study of Hydraulic Conductivity of Remolded Loess

通过不同渗透压强下的渗透试验研究了重塑黄土的渗透性。分别制取六种不同孔隙比的重塑土样和一种原状土样,进行渗透实验,渗透过程分别考虑了不同的孔隙比和不同压强对重塑黄土的渗透性的影响。结果表明:重塑黄土的渗透系数随孔隙比增大呈先增大再减小的趋势;重塑黄土的渗透系数随反压增大呈减小的趋势;加压阶段重塑黄土的渗透系数变化约为卸压阶段渗透系数变化的15倍左右;孔隙比越大渗透对土体结构影响也越大。重塑黄土的渗透性的研究,为土的阻污性及土工合成材料的渗透性的研究提供数据支持,同时为工程实践提供参考。

Hydraulic conductivity of soil was mainly studied. Six different void ratio remolded loess samples and one original loess sample were prepared before the test of permeability. The influences of different void ratio and different pressure of water was considered in the stage of permeation. The results indicate that different void ratios and different pressures affect the hydraulic permeability of remolded loess some degree in different stages of permeation; permeation affect the structure of loess in some degree. This test mainly study the permeability of remolded loess,It provide some support in the study of impeding soil＇s pollution or useful reference in practical engineering.