The electrical resistivity testing technique is one of electrical exploring methods. Due to its being nondestructive, precise, rapid, low-cost, many experts at domestic and abroad have made great efforts to develop its application in geotechnical engineering in recent years. 

Since Sep.1999, we have begun to explore the feasibility of its application for assessing engineering quality of the Dry Jet Mixing Pile. Based on this foundation, we organized some experts to manufacture the testing electrical resistivity equipments, and we will do some research on the feasibility and availability of its application on the soil improvement engineering further.  Meanwhile, we will study the correlation between electrical resistivity, fabric and physical-mechanical property index of clay, composite clay, loess, expansive soil systematically and fourther.  All of this may be value in improving the testing efficiency, insuring engineering quality, analyzing the quantitative change of fabric, grasping the mechanics of strength and distortion flow, revealing the nature of residual and peak strength and the stress-strain behavior of soils, as well as connecting the structural parameters and its macroscopic characteristic.