基于伪随机流场法的岩溶地区土石坝渗漏检测

Leakage detection of earth and rockfill dam in karst area by pseudo-random flow field method

在我国岩溶地区,由于溶洞、溶沟、溶槽分布随机,能否准确找到渗漏通道是土石坝防渗处理的关键。通过梳理水库渗漏检测手段,详细说明伪随机流场法的基本原理、工作方法。以西南某水库土石坝为例,运用伪随机流场法检测渗漏通道入口,并结合水体电阻率测试验证伪随机流场法检测成果,明确渗漏通道入口位置,最终说明伪随机流场法在岩溶地区运用的有效性,为实际探测印证水库渗漏通道入口提供了一种新思路。

In karst areas of China, it is critical to find out the leakage passage during seepage treatment and control of an earth and rockfill dam, due to the random distribution of karst caves, ditches and grooves. By means of summarizing detection methodologies, the basic principles and working contents of pseudo-random flow field method are explained in detail. Using a rockfill dam in Southwest China as an example, the entrance of leakage passage was detected by pseudo-random flow field method, and the position of entrance of leakage passage was specified based on verification by results of water resistivity test. It is confirmed that pseudo-random flow field method can be effectively applied to karst areas of China, which provides a new approach for actual detection and confirmation of reservoir leakage passage entrance.