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在对国内外相关研究成果做文献综述的基础上,对影响电阻率测试结果的几个重要因素如温度、测试频率、测试方法、土样与电极间的接触问题等进行了专门探讨,并对电阻率方法的缺点与不足之处进行了分析。土的电阻率受温度影响显著,且在0℃上下因相变而更加复杂;污染土的电阻率与温度间关系与污染物成分及含量密切相关;对于非饱和土的电阻率量测存在一个相对合理的频率范围;相比而言,四电极法可以避免电极极化效应的影响,测量结果也比较准确,但两电极法线路连接方便,易于和常规土工仪器配套使用。
On the basis of literature review of relevant research results both at home and abroad, several important factors affecting the resistivity test results, such as temperature, test frequency, test methods, contact between soil samples and electrodes, are discussed in detail. The shortcomings and deficiencies of the resistivity method were analyzed. The resistivity of soil is affected by temperature significantly, and it is more complicated due to the phase change at 0 ℃. The relationship between the resistivity and temperature of contaminated soil is closely related to the composition and content of pollutants. There is one resistivity measurement for unsaturated soil Relatively speaking, the four-electrode method can avoid the influence of electrode polarization effect and the measurement result is relatively accurate. However, the two-electrode method is convenient for connection and is easy to be used with conventional geotechnical instruments.