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为了更好地诊断路基质量状况,以山区道路建设中常见的土石混填路基为例,制作了路基内存在空洞、不均匀体以及不密实区3种不同病害的路基模型,采用电阻率成像检测法对病害模型进行了诊断测试,并对预设病害区域与电阻率成像诊断结果进行对比分析。结果表明:当路基内存在病害区域时,在路基的电阻率图像中会产生一个电阻率异常变化区域与之对应;预设病害区域的位置与电阻率异常变化区具有良好的对应关系,不同类型病害的电阻率异常变化幅度也不一致;采用电阻率成像诊断方法对路基压实质量进行检测和病害诊断是可行的。
In order to better diagnose the subgrade quality, taking the common soil-rock mixed embankment in mountain road construction as an example, the roadbed model with three kinds of diseases such as cavity, inhomogeneous bodies and inhomogeneous areas is made. Resistivity imaging The method was used to diagnose the disease model and the comparative analysis of the diagnostic results of the pre-determined disease area and the resistivity imaging. The results show that when there is a disease area in the subgrade, there will be a corresponding area of resistivity anomaly in the resistivity image of subgrade. Correspondingly, there is a good correspondence between the preset disease area and the resistivity anomaly area. The resistivity anomaly of the disease is not the same. The resistivity imaging diagnosis method is feasible to detect the compaction quality and diagnose the disease.