基于跨孔雷达CT技术的大直沟水库大坝渗漏缺陷探测研究OA

To improve the detection accuracy of dam leakage defects,a detection method for leakage defects in the Dazhigou Reservoir dam based on cross-hole radar CT technology was proposed.This study combined geological survey and hydrological monitoring data from the Dazhigou Reservoir to construct a cross-hole radar CT detection model.By selecting a high-frequency antenna cross-hole radar system and appropriately arranging three high-density electrical survey lines,and taking the apparent resistivity change rate as the key indicator,the location and size of leakage defects were accurately determined by comparing the variation in apparent resistivity between two adjacent points.The experimental results demonstrated that cross-hole radar CT technology can clearly identify small-scale leakage defects inside the dam body,with a positioning error of less than 40 mm,and can accurately detect the crack width of seepage defects.This study has significant theoretical importance and practical value for improving dam safety monitoring and ensuring the stable operation of the reservoir.