摘要
对污染场地进行地基处理前需进行污染评价,电阻率法是常用的监测方法。为研究非水相液体污染黏土的电阻率特性,本文应用二极法对水饱和、污染物与水共同饱和、非饱和状态下的污染土电阻率进行了测试。试验结果显示,水饱和黏土的地层因子随孔隙率的增大而增大;饱和污染黏土的电阻率随着水饱和度的增大呈幂函数形式降低;非饱和状态下,当体积含污率一定时,土体电阻率随着体积含水率的增大呈幂函数关系减小,体积含水率一定时,土体电阻率随着体积含污率的增大而线性增大,体积含湿率的增加会使土体电阻率逐渐减小。正交试验结果表明,本试验中影响污染土电阻率的因素主次顺序为:体积含水率、孔隙率、体积含污率。
Contamination evaluation is required before foundation treatment of contaminated sites,and resistivity method is a common monitoring method.In order to study the resistivity characteristics of non-aqueous phase liquid contaminated clay,this paper applied the two-electrode method to test the resistivity of contaminated clay in water-saturated,contaminant-water co-saturated and unsaturated states.The test results show that,the formation factor of water-saturated clay increases with the increase of porosity;and the resistivity of saturated contaminated clay decreases as a power function with the increase of water saturation.In unsaturated state,the soil resistivity decreases as a power function with the increase of volumetric water content for a given volumetric dirt content.The soil resistivity increases linearly with the increase of volumetric dirt content for a given volumetric water content,and the increase of volumetric moisture content will cause the soil resistivity to decrease gradually.The results of orthogonal experiments show that the factors affecting the resistivity of contaminated soil in this test are in the following order:volumetric water content,porosity,volumetric dirt content.
作者
祁妍敏
章定文
林文丽
QI Yan-min;ZHANG Ding-wen;LIN Wen-li(Institute of Geotechnical Engineering,Southeast University,Nanjing 211189,Jiangsu,China)
出处
《地基处理》
2022年第S01期29-36,共8页
Journal of Ground Improvement
关键词
非水相污染物
污染土
二极法
电阻率特性
影响因素
正交分析
non-aqueous phase pollutants
contaminated soils
two-electrode method
electrical resistivity characteristic
influence factors
orthogonal analysis
