Combined with geotechnical engineering investigation of line 1, 2, and 3 of Ningbo urban rail transit project, the equidistant Wenner four-electrode method was used to test resistivity of soil, and the influence of water content, void ratio, compression modulus on the resistivity was discussed and the correlation was developed. The re-sults show that there is good correlation between resistivity of soft clay in Ningbo area and physical and mechanical indexes of water ratio, void ratio, compression modulus, the soil resistivity decreases with the increase of the water content and void ratio, and increases with the increasing of the compression modulus. The resistivity is different in different soil layers, conductivity of clay and silty clay is better than sand. The results can provide reference for de-sign of power supply, power distribution and transformer, catenary and the weak electricity of Ningbo urban rail tran-sit project.%结合宁波轨道交通1、2、3号线岩土工程勘察,利用Wenner等距四极法测定土体电阻率,研究了含水率、孔隙比、压缩模量对各土层电阻率影响及相关性,结果表明:宁波地区软黏土电阻率与物理力学指标含水率、孔隙比、压缩模量之间的相关性较好,土的电阻率随含水率、孔隙比的增大而减小,随压缩模量的增大而增大;不同土层的电阻率不同,黏土及粉质黏土的导电性优于砂土,为轨道交通供电、变配电、接触网及弱电设计提供依据.
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