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为研究油类污染粉质黏土的电阻率特性,室内分别拌制了不同含水率、不同含油率的柴油、煤油污染土试样,采用四电极方法对不同状态下的污染土体电阻率进行了测试。试验结果显示,两种油污染土有相似的变化规律,即在相同的含水率下,均表现为电阻率随着含油率的增加而线性增大;在相同的含油率下,随着含水率、水饱和度的增加而呈幂函数关系减小。为了分析油、水二相体对电阻率的影响,引入了体积含湿率、油水饱和度两个指标,发现在相同的水饱和度下,电阻率随体积含湿率的增加而线性增大;在相同的体积含湿率下,电阻率随油水饱和度的增加而幂函数关系减小。进一步分析表明,电阻率与体积含湿率间存在线性相关关系,与油水饱和度间存在幂函数相关关系,两种油污染土的电阻率与体积含湿率、油水饱和度间的关系可以用同一公式表达。
In order to study the resistivity of oil polluted silty clay, the diesel and kerosene polluted soil samples with different water content and different oil content were mixed indoors, and the resistivity of polluted soil under different states was tested by four-electrode method test. The results show that the two oil contaminated soils have similar variation rules, that is, under the same moisture content, the resistivity increases linearly with the increase of oil content. With the same oil content, with the increase of water content , The increase of water saturation decreased with power function. In order to analyze the effect of oil and water two-phase on the resistivity, two indexes of volumetric moisture content and oil-water saturation were introduced. It was found that the resistivity increased linearly with the increase of volumetric moisture content under the same water saturation At the same volumetric moisture content, the resistivity decreases with the increase of oil-water saturation. Further analysis shows that there is a linear correlation between resistivity and volumetric moisture content and a power function relationship between oil-water saturation. The relationship between the resistivity of two oil-contaminated soils and volumetric moisture content and oil-water saturation can be used The same formula.