饱和砂的交流电阻率特性研究  

On Ac Resistivity Characteristics of Saturated Sand

作　　者：刘晓凤[1] 邱斌[1] 刘德[1] 张悦[1] 董晓强[1] 

机构地区：[1]太原理工大学建筑与土木工程学院,太原030024

出　　处：《太原理工大学学报》2014年第5期653-656,共4页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(51078254);山西省高等学校大学生创新创业训练资助项目(2012066)

摘　　要：采用电阻率法定量研究土的孔隙特征,通过试验测量了不同孔隙率的饱和砂在不同电流频率下的交流电阻抗,然后研究电阻率、电流频率以及孔隙率之间的关系。结果表明:孔隙水的电阻率随频率的增加而减小;饱和砂的电阻率随电流频率的增加而减小;饱和砂的电阻率随孔隙率的增加而减小;结构因子随电流频率的增加而增加;结构因子随孔隙率的增加而减小;最后在分析等效电路的基础上建立了考虑电流频率变化的饱和砂电阻率模型。Electrical resistivity method was used to quantitatively study the pore characteristics of sand.Saturated sand AC impedance of different porosities under different current frequencies was measured to study the relationship between resistivity,frequency and porosity.Conclusions were as follows：the electrical resistivity of pore water decreased with the increase of current frequency;the electrical resistivity of saturated sand decreased with the increase of current frequency;the electrical resistivity of saturated sand decreased with the increase of porosity;the structure factor increased with the increase of current frequency;the structure factor decreased with the increase of porosity;finally,according to the current frequency a resitivity model of saturated sand was built on the basis of equivalent circuit.

关 键 词：饱和砂 电阻率 电流频率 孔隙率 结构因子 

分 类 号：TU411.2[建筑科学—岩土工程]