格威系列地质雷达及其在水库坝基渗漏探测中的应用

摘要

Ground penetrating radar is widely used,but the detected depth for reservoir dam foundation need to be increased,the reliability of detection need to be further improved.The Groundvue series of ground penetrating radar system was introduced from the United Kingdom,which was funded by the 948 Projects of the Ministry of Water Resources.Its antenna has the lowest frequency of a radar currently.The detection depth and reliability for reservoir dam foundation of Groundvue series of ground penetrating radar system was significantly improved than general ground penetrating radar.Through a lot of simulation test,Groundvue ground penetrating radar image features related to typical object were mastered.Through a lot of test analysis and summary,the deep step by layer test and analysis method were established.By detecting and analysis for Nanmen Gorge Reservoir,results showed that there was obvious strong leakage band in the bedrock,the local obviously broken belt developed on the right bank of the grouting tunneldraw.It provided technical support for design and construction of danger removal and reinforcement.%地质雷达虽然应用广泛,对于水库坝基的测试深度有待增加、测试可靠性有待进一步提高.利用水利部948项目资金从英国引进的格威系列地质雷达,是目前国际上具有最低频率的一款雷达,可以提高水库坝基的探测深度和可靠性.通过大量的室内模拟试验,掌握了相关典型目标物的格威地质雷达图像特征.通过大量的测试分析总结,建立了深部逐步层次测试分析方法.南门峡水库坝基的探测成果表明,在基岩中存在明显的强渗漏带,灌浆隧洞右岸局部地方明显存在破碎带,为水库除险加固工程的设计和施工提供了技术支撑.