江垭水库坝基渗水来源物探分析

Reconnoiter and analysis on the source of seepage from the dam foundation of Jiangya Reservoir

在对江垭水库大坝物探勘查工作中,除运用了自然电场法等常规查漏方法外,还采用了流场法DB-3普及型堤坝渗漏检测仪进行勘查。通过三次自然电场法勘查成果分析,大坝存在的几处渗漏点(区)主要分布在库内3线、2线。流场法连通实验结果分析表明,渗漏点(区)渗水与120、114及左岸3条排水廊道的渗水有一定关系,廊道内渗水主要来自库水。另外,160廊道内几处微渗水是库水通过大坝坝体渗漏的。

Except the method of nature electric fieht, we used DB-3 popular dam seepage detection device of flow field method to reconnoiter around Jiangya dam site. Through reconnoitering dam by the method of nature electric field three times,it indicated thai main seepage places distribute in line 3# ,line 2#. Through reconnoitering dam by the method of flow field ,it indicated that seepage places are related to No, 120, No. 114 and left galleries of dam, The gallery seepage is from the reservoir mostly, In addition ,a few tiny seepage of No,160 gallery is from the dam body.