土石复合介质电阻率结构模型及影响因素分析

多相土石复合介质电阻率特性由于影响因素较多,目前对于其理论模型研究较少。在前人提出的非饱和土电阻率结构模型的基础上,基于土石介质串联和土石介质并联两种结构形式,建立了多相土石复合介质电阻率结构模型,并分析了含水率、孔隙率、土石比和饱和度对土石复合介质电阻率特性的影响规律,结果表明:当土石颗粒本身的成分不变时,影响土石复合介质电阻率特性的主要因素有含水率、孔隙率、土石比三个因素,其敏感程度从大到小依次为含水率、孔隙率和土石比。

Analysis of Electrical Resistivity Structure Model and Influence Factors for Soil-stone Composite Medium

Because the electrical resistivity of multi-phase soil-stone composite medium is influenced by so many factors,there are only few studies about the theoretical model of this medium.On the basis of existing structure models of unsaturated soil's electrical resistivity,the structure model for the electrical resistivity of multi-phase soil-stone composite medium is established based on both the series connection structure and parallel connection structure of soil stone mixture.The influence laws of water content,porosity,soil-rock ratio and saturation on the electrical resistivity are analyzed.The results show that when the composition of soil-stone particles are not changed,in the order of sensitivity,the main factors that affect the electrical resistivity characteristics are water content,porosity and soil-rock ratio.