武汉地区一级阶地黏性土电阻率试验研究  

THE STUDY OF THE RELATIONSHIP BETWEEN RESISTIVITY AND GEOTECHNICAL PARAMETERS FOR CLAYEY SOIL IN THE FIRSTSTAGE TERRACE OF WUHAN DISTRICT

作　　者：朱帆济 舒武堂 代昂 

机构地区：[1]武汉市政工程设计研究院有限责任公司,武汉430015 [2]武汉市建设工程设计审查办公室,武汉430015

出　　处：《工程地质学报》2015年第3期539-547,共9页Journal of Engineering Geology

摘　　要：通过电阻率原位测试和室内土工试验,研究黏性土电阻率特性及电阻率与岩土参数的相互关系。在武汉市轨道交通7号线勘察过程中,沿轨道走向,在长江一级阶地共布置完成电阻率测井22组,并于测井位置采取原状土样进行常规土工试验、无侧限抗压试验、直剪快剪试验及三轴UU试验。通过研究发现:黏性土电阻率随含水量及孔隙比的增加而增加,随无侧限抗压强度增加而减小。根据黏性土三轴UU试验结果,其电阻率随黏聚力、内摩擦角的增加而减小。通过拟合,给出了黏性土电阻率与岩土参数间的经验公式,其相关性显著。The resistivity of soil is an important parameter to describe its electrical conductivity. Through in-situ testing of resistivity and laboratory tests,the characteristics of resistivity of clayey soil and the relationship between resistivity and geotechnical parameters were studied.22 logs of resistivity were measured in the first-stage terrace of Wuhan district. All these logs were placed along the traces of the No. 7metro of Wuhan. Routine soil test,nonconfined compression test,quick shear test and triaxial shear test were done by using samples taken from these logs.It was found that,firstly,the resistivity of clayey soil increased with the increase of water content and void ratio;secondly,the resistivity decreased with the increase of non-confined compressive strength; thirdly; according to the result of triaxial shear test,the resistivity decreased with the increase of cohesion and angle of internal friction.Through linear and polynomial fit,the mathematic expression between resistivity and geotechnical parameters of clayey soil were offered. The correlation between the resistivity and those indexes are significant.

关 键 词：电阻率 黏性土 含水量 孔隙比 无侧限抗压强度 黏聚力 内摩擦角 

分 类 号：TU443.1[建筑科学—岩土工程]