砂土电阻率影响因素实验研究

Experimental investigation on influencing factors in sand resistivity measurement

电阻率是表征介质导电性的参数,土壤电阻率是各种物理特性的综合表现,是土壤的基本物性参数之一。实验研究了含水率、孔隙度和温度对几种砂土电阻率的影响,研究结果表明:含水率、孔隙度和温度均对土壤电阻率有明显的影响,含水率和孔隙度均与电阻率呈指数关系;温度对不同砂土介质的影响形式不同,其中砂土的温度与电阻率呈线性关系,而粉土的温度与电阻率呈负指数关系,60℃以内温度的变化对土壤电阻率的影响十分明显。

Resistivity is a parameter indicating the conductivity of a medium. Soil resistivity is a comprehensive representation of various physical properties and is one of the basic physical parameters of soil. In this paper, the effects of water content, thevoidrario and temperature on the resistivity of several sands were studied experimentally. The results show that water content, thevoidrario and temperature have significant effects on soil resistivity. The water content is thevoidratio related to the resistivity. The void ratio is exponentially related to the resistivity the influence of temperature on different sand media is different. The temperature-resistivity of medium sand is linear, while the temperature-resistivity of silt is negative exponential. The effect of temperature change within 60 ℃ on soil resistivity is very obvious.