柴油污染土电阻率与热阻率的相关关系

Correlation of thermal resistivity and electrical resistivity of diesel contaminated soil

电阻率与热阻率是土体的基本参数,分别采用四电极方法和非稳态探针方法对不同状态下试样的电阻率与热阻率进行了测试,并对相同状态下2者之间的相关关系进行研究.结果表明,在相同含水率时,不同含油率污染试样的电阻率、热阻率与水饱和度之间具有相似的相关关系,随着水饱和度的增大,电阻率、热阻率均呈幂函数关系减小.以未污染土体的电阻率、热阻率和水饱和度为基数,污染土体的电阻率与水饱和度、热阻率与水饱和度之间均可建立线性相关关系.同时,分析了未污染土体的电阻率与热阻率之间的相关关系,2者之间的相关系数可由与颗粒含量有关的参数F来线性表示.

Electrical resistivity and thermal resistivity are basic properties of soils. Four electrode method and non-steady-state probe method are used to measure soil electrical resistivity and thermal resistivity at different states, respectively, and the relationships between two properties of soil at the same states are studied. The results show that under the same water content, relationships between electrical resistivity and water saturation degree, thermal resistivity and water saturation degree are similar, electrical resistivity and thermal resistivity both decrease in power function with the increase of water saturation degree. Furthermore, based on the electrical resistivity, thermal resistivity and water saturation degree of uncontaminated soil, relationships between electrical resistivity and water saturation degree, thermal resistivity and water saturation degree of contaminated soil can be ex- pressed in linear formula. Correlation of thermal resistivity and electrical resistivity of uncontaminated soil is studied, the correlation coefficient of these two parameters can be expressed linearly by a parameter F, which is concerned with the particle content.