伪随机流场法在仁宗海坝前和右岸渗漏探测的应用  

Application of Pseudo-random Flow Field Method in Leakage Detection in Front of Renzonghai Dam and on the Right Bank

作　　者：彭鑫 张浩 PENG Xin;ZHANG Hao(Sichuan Provincial Investment Group Co.,Ltd.,Chengdu Sichuan 610044;Yellow River Power Maintenance Engineering Co.,Ltd.,Xining Qinghai 810003)

机构地区：[1]四川省投资集团有限责任公司,四川成都610044 [2]黄河电力检修工程有限公司,青海西宁810003

出　　处：《四川水力发电》2023年第S02期111-115,共5页Sichuan Hydropower

摘　　要：仁宗海大坝自建成以来,渗漏问题一直较为突出,虽经多次处理,但渗漏量依然较大。仁宗海坝面土工膜、坝基防渗墙、两岸防渗帷幕的防渗体系较为特殊,尤其是土工膜与左右岸趾板及防渗墙连接位置易出现压合不紧密的情况。为准确探明坝面和右岸渗漏入水点位,采用伪随机流场法,在正常蓄水位时,对坝面和左右岸区域进行精准探测,并经后期数据处理和成像显示,发现土工膜与两岸趾板、防渗墙连接处及右岸边坡存在较为明显的渗漏异常区。结合水下机器人喷墨显影,清晰显示了异常区的渗漏现象。该次探测未发现坝面土工膜存在渗漏异常区。Since the Renzonghai Dam was built,the leakage problem has been prominent.Although it has been treated multiple times,the leakage volume is still large.The anti-seepage system of the Renzonghai dam is special composed by the geomembrane on the dam surface,anti-seepage wall on the dam foundation,and anti-seepage curtain on both sides,especially where the connection between the geomembrane and the left and right bank toe plates and anti-seepage walls,which is prone to loose compression.In order to accurately detect the leakage points on the dam surface and the right bank,the pseudo-random flow field method was used in this study to accurately detect the dam surface and left and right bank areas.After later data processing and imaging,it was found that there were obvious abnormal leakage areas at the connection between the geomembrane and the toe plates on both banks,the anti-seepage wall,and the right bank slope.Combined with underwater robot inkjet imaging,the leakage phenomenon in the abnormal area was clearly displayed.This inspection found no abnormal leakage areas in the geomembrane on the dam surface.

关 键 词：伪随机 流场法 仁宗海 渗漏 

分 类 号：TV697.32[水利工程—水利水电工程]