延时电阻率成像监测土层含水变化的实验研究

Experimental Study on Monitoring Change Process of Soil Water Content by Time-delay High Density Electrical Resistivity Tomography

为研究延时高密度电法对路基地质问题中土层含水量变化监测的有效性,在野外进行了实验。对比浇盐水前后、以及浇灌不同水量导致的视电阻率时空变化特征,分析土层含水量与视电阻率之间的关系。实验结果表明,延时电阻率成像对土层含水量变化过程的监测有较好的效果,这种新的地球物理方法将有助于监测和解决路基工程中的变形、沉降等地质问题。

In order to study the validity of time-delay high density resistivity method applied in monitoring soil moisture change of subgrade geological problems,an experiment is done outdoor.The relationship between soil water content and apparent resistivity is analyzed by comparing the apparent resistivity of different space and time.The experimental results show that the time-delay high density electrical resistivity tomography has a good effect in monitoring the soil water content.This new geophysical method will help to monitor and solve the subgrade geological problems such as deformation and settlement.