水-土作用对土体渗透系数的影响研究

Experimental studies of coefficient of permeability of soil affected by water-soil interactions

摘要: 随着环境的改变,水质成分日趋复杂,水-土作用对土体性能的影响越来越明显。针对这一情况,考察了不同种类、不同浓度及不同pH值溶液对土体渗透系数的影响。结果表明,水-土作用对土体渗透系数存在正负两个方向的影响,且影响显著,对土体SEM照片分析后发现,水土之间通过阳离子交替吸附作用和溶蚀及结晶沉淀作用,使土体微观形貌及孔隙特征发生变化,最终导致其渗透性发生改变。

Abstract: In order to examine the influence of water-soil interactions on coefficient of permeability of soil,soil samples have been tested in laboratory with different chemical solutions,including deionized water,solution with different pH,and Na2SO4,NaHCO3,CaCl2,TP,TN solutions with different concentrations.The results indicate that the coefficient of permeability are changed,and there exist both positive and negative effects on the specimens in this test.The SEM photos show that dissolution and deposit...