土的电阻率是土的固有物性参数之一,可反映土的基本物理力学性质指标及结构特征等,具有重要的理论意义和应用价值。利用课题组研制的ESEU-1型土电阻率测试仪对膨胀土与黄土的电阻率进行测试,主要研究了孔隙率、孔隙结构等土的微结构特征对电阻率的影响规律。研究结果表明:孔隙率与孔隙结构等土的微结构特征对土的电阻率存在显著的影响,微结构不同、其他条件相同的土样的电阻率存在较大差别,且在水与导电性良好的NaCl溶液中饱和后的大小与变化规律也不一致。 Soil resistivity is one of the intrinsic physical parameters of soil, which can reflect the basic physical and mechanical properties of soil indicators and structural characteristics, which has important theoretical significance and application value. The resistivity of expansive soil and loess was tested by ESEU-1 soil resistivity tester developed by the research group. The influence of microstructure characteristics such as porosity and pore structure on the resistivity was mainly studied. The results show that the microstructure characteristics of soil such as porosity and pore structure have significant influence on the resistivity of soil. The resistivity of soil samples with the same conditions are different with different microstructures. In the case of water with good electrical conductivity NaCl solution after the saturation of the size and variation are not the same.