粘性土的电阻计算模型  

Electric resistance calculation model of clay

作　　者：龚晓南[1] 焦丹[1,2] 李瑛[1] 

机构地区：[1]浙江大学软弱土与环境土工教育部重点实验室,杭州310058 [2]西安建筑科技大学理学院,西安710055

出　　处：《沈阳工业大学学报》2011年第2期213-218,共6页Journal of Shenyang University of Technology

基　　金：国家自然科学基金资助项目(50879076)

摘　　要：电阻是土体电渗中的重要参数,为了对电渗现场土体电阻进行研究,提出了粘性土的电阻计算模型.电阻率是土体的基本参数,它受土体的含水率、孔隙比和饱和度等因素的影响.建立了粘土三相并联电阻率模型,并给出了电阻率的计算式,根据电阻率与电阻的关系,推导出排形电极、环形电极和六边形电极下土体电阻的计算式.室内试验结果表明,对于含水率大于25%且饱和度大于50%的杭州粘土,计算结果和实测结果较为吻合.粘性土电阻计算为实际工程中土体电阻的估算提供了一种简单便捷的方法.Electric resistance is an important parameter for soil electroosmosis.In order to study the resistance of soil in electroosmosis field,the electric resistance calculation model of clay was presented.The electric resistivity is one basic parameter of soil,which is mainly affected by such factors as water content,porosity ratio and saturation degree.The three-phase parallel resistivity model for clay was established,and the calculating formula of electric resistivity was given.According to the relationship between electric resistivity and resistance,the formulations of soil resistance under parallel electrode,circle electrode and hexagonal electrode were derived.The results of laboratory tests show that the calculated results are similar to the measured ones for Hangzhou clay with the water content above 25% and saturation degree over 50%.The resistance calculation of clay provides a simple and convenient method for estimating the resistance of soil in practical engineering.

关 键 词：电阻率 电阻 三相并联电阻率模型 室内试验 电阻计算式 排形电极 环形电极 六边形电极 

分 类 号：TU472.5[建筑科学—结构工程]