孔中雷达探测水库坝基渗漏的应用研究

Application research of detecting reservoir dam foundation leakage by using borehole radar

介绍使用孔中雷达技术对水库进行渗漏隐患探测的过程。通过对采集数据处理和图像解译分析,探明坝基岩石存在主要裂隙、与坝基接触部位坝体心墙含水量大的情况,从而形成水库坝基渗漏条件。根据探测结果,对坝基渗漏区域进行灌浆加固处理,取得了理想的防渗效果。实践证明,孔中雷达作为水库渗漏隐患探测技术手段,能够探明发育明显的裂隙层面(或孔洞)和是否存在含水量大区域等地质特征,对分析判定水库坝基渗漏位置有参考价值。

The application process of using borehole radar technology to detect leakage hazards in a reservoir.Several main fissures in the rock of dam foundation and large water content of core wall of dam body contacting dam foundation were verified through data processing and image interpretation,thus forming the leakage conditions of reservoir dam foundation.The site with leakage problem in dam foundation was consolidated by grouting according to detection results,and finally ideal seepage control effect was obtained.Practice shows that,borehole radar,as a technical way for detecting reservoir leakage hazard,can detect the geological features such as obvious fracture planes(or holes)and the presence of high water content areas,bringing reference value for analyzing and determining the leakage site of reservoir dam.