新近系砂质黏土导电特性研究

Electrical conductivity of neogene sandy clay

为研究新近系沉积土层在荷载作用下电阻率变化特征,运用自建电阻率测试系统对取自该层的砂质黏土样进行单轴压缩试验,对连续荷载作用下土样的应力、应变、电阻率进行测试,分析应力-应变过程中受荷土样电阻率响应特征。研究表明:土样电阻率的变化与破坏阶段具有一定的对应关系,并存在突变点,通过连续测试土样受荷过程中电阻率的变化,为工程活动中土体的变形监测提供了一种手段。

To study the resistivity change characteristics of neogene sandy clay,the self-built resistivity test system was used to carry out uniaxial compression test on soil samples taken from the layer of sandy clay and test on stress,strain,and resistivity of neogene sandy clay under continuous loads to analyze the resistivity response characteristics of the neogene sandy clay under load in the stress-strain process.The results show that:there exists a certain correspondence between the resistivity change and the failure stage,and also exists a sudden change point by continuous test the change of resistivity of soil samples during loading,?which provides an evaluation method for the monitoring of soil deformation in engineering activities.