黄土非饱和渗流试验研究  

Unsaturated seepage test in loess

作　　者：独仲德[1] 赵英杰[1] 程金茹[1] 

机构地区：[1]中国辐射防护研究院,太原030006

出　　处：《水文地质工程地质》1997年第2期50-52,共3页Hydrogeology & Engineering Geology

摘　　要：黄士介质特有的垂直节理和大孔隙发育性质，使黄土非饱和渗流过程具有与均匀土壤的非饱和水分运动不同的特征。通过黄土非饱和渗流试验研究，对黄土垂直节理、大孔隙的实地观察和用土壤水动力学理论分析，证明黄土介质中的垂直节理、大孔隙在不同含水量下对水分入渗所起的作用。对干旱地区黄土，由于降水量小、土壤含水量少，垂直节理、大孔隙在水分入渗过程中实际起降低渗透性的作用，即阻水作用。Vertical joint and large pore space constitute one of the loess layer construction characteristics, which makes a difference between loess and ordinary soil in unsaturated seapage. This study, through experiment on unsaturated seepage, field observation on vertical joint and large pore space in loess and theoretical explanation in terms of hydrodynamics suggests that vertical joint and large pore space may act differently on permeability during water seepage under different water content. For the loess in arid area, due to small precipitation and water content in soil, the joint and large pore space, in substance, play a role of reducing the permeability, that is the role of water-resisting.

关 键 词：黄土 包气带 渗流 非饱和渗流 

分 类 号：P642.131[天文地球—工程地质学]