基于Groundvue系列地质雷达水库防渗墙探测分析

On the Detection of Seepage Cutoff Walls for Reservoir Based on Groundvue Series of Ground Penetrating Radar

南门峡水库的与防渗墙有关的渗漏问题严重,历次防渗处理效果不明显。利用从英国引进Groundvue系列地质雷达设备,采用深部逐步层次测试分析法,对防渗墙部位进行了大量的现场测试分析和解译,结合钻探验证,查明了渗漏部位和路径。结果表明:坝基防渗墙完好,厚度在0.50m左右,但位置与现有的灌浆平台有3m左右的水平距离,这可能是历次灌浆效果不佳的一个重要原因,为南门峡水库加固工程提供了重要的技术支撑。

There has been the serious problem of the seepage cutoff wall of Nanmenxia Reservoir,with the previous anti- seepage effect having no satisfactory outcome. With the Groundvue series of Ground？ Penetrating Radar equipment introduced from Britain,and the application of the Method of Deep Step by Layer Test and Analysis,a lot of field tests and analysis have been conducted on the part of the cutoff wall. In combination with drilling verification,the leakage location and path have been found out. The outcome has shown that the seepage cut- off wall of dam foundation in good condition,with its thickness of around 0. 50 m,but there is a horizontal distance of about 3m away from the current grouting platform,which may be one important cause of the previous unsatisfactory grouting effect,providing an important support for the Reinforcement Project of Nanmenxia Reservoir.