土的电阻率特性及其工程应用研究  

Research on electrical resistivity feature of soil and it's application

作　　者：刘国华[1] 王振宇[1] 黄建平 

机构地区：[1]浙江大学建筑工程学院,浙江杭州310027 [2]水利部农村电器化研究所,浙江杭州310012

出　　处：《岩土工程学报》2004年第1期83-87,共5页Chinese Journal of Geotechnical Engineering

基　　金：浙江省自然科学基金资助项目(502020)

摘　　要：在阐述电阻率层析成像理论的基础上,采用改进的MillerSoilBox进行土样的室内电阻率试验,根据4因素3水平正交试验得出影响土的电阻率变化的主次因素顺序是:含水率、孔隙水的导电性、饱和度、土的种类。依据大量试验数据,分析了电阻率与土的基本物理指标之间的相关性,建立一个基于推广阿尔奇公式的黏土电阻率模型。对实测结果进行电阻率层析成像,能较好地发现地下目标。Based on the discussion of the theory of electrical resistivity tomography (ERT),Miller soil box is adopted to perform a standardized laboratory procedure for measuring soil electrical resistivity. Through orthogonal test,it is discovered that the influences of electrical resistivity decrease in such an order: water content, pore-water electrical conductivity, degree of saturation,type of soil. The correlation between electrical resistivity and soil physical indexes is also thoroughly studied in this paper. Then, an electrical resistivity model and its Archie's parameters of typical clay are established. Finally, A practical demonstration is given to illustrate the ability to find potential object by ERT.

关 键 词：土 电阻率 层析成像 正交试验 含水率 

分 类 号：TU411[建筑科学—岩土工程]