郑州“7·20”特大暴雨后常庄水库主坝综合物探分析  

Comprehensive Geophysical Prospecting Analysis of the Main Dam of Changzhuang Reservoir After the Torrential Rainstorm of July 20,2021 in Zhengzhou

作　　者：赵丽娜 霍吉祥[2] 俞扬峰 周海啸[2] ZHAO Lina;HUO Jixiang;YU Yangfeng;ZHOU Haixiao(Management Office of Changzhuang Reservoir,Zhengzhou 450006,China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing Hydraulic Research Institute,Nanjing 210029,China)

机构地区：[1]郑州市常庄水库管理处,河南郑州450006 [2]南京水利科学研究院水文水资源与水利工程国家重点实验室,江苏南京210029

出　　处：《人民黄河》2022年第11期152-155,共4页Yellow River

基　　金：国家重点研发计划项目(2019YFC1510802);中央级公益性科研院所基本科研业务费专项(Y721009,Y721002,Y722003)。

摘　　要：2021年郑州市“7·20”特大暴雨过程中,常庄水库主坝下游坝坡先后出现多处渗水、塌坑等险情。为探测坝体是否存在渗流隐患、查明险情后主坝质量情况,采用探地雷达与高密度电法相结合的综合物探手段对大坝进行探测分析。依据工程特点和出险位置,分别采用探地雷达对上、下游坝坡及坝顶进行探测,并采用高密度电法对下游坝坡进行探测。结果表明:在探测范围内大坝土体总体均匀密实,未见明显的空洞缺陷或渗漏通道等不良病害,但大坝下游坝坡浅层土体相对欠密实,可能是暴雨过程中诱发下游坝坡出现渗水、塌坑等险情的主要因素。During the torrential rainstorm of July 20,2021 in Zhengzhou,some dangerous situations such as water seepage and pit collapse occurred in the downstream slope of the main dam of Changzhuang Reservoir.In order to detect whether there is seepage potential in the dam body and find out the quality of the main dam,the comprehensive geophysical prospecting method combining with ground penetrating radar and high-density electrical method was used to detect and analyze the dam.According to the characteristics of the project and the location of the accident,ground penetrating radar was used on the upstream and downstream dam slopes and the dam crest,and the high density electri⁃cal method was used on the downstream dam slopes.The results show that the soil mass of the dam is generally uniform and dense within the detection range,and there is no obvious cavity defect or leakage channel.However,the shallow soil mass of downstream slope is relatively less dense,which may be an important factor for inducing dangerous situations such as seepage and pit collapse during the rainstorm.

关 键 词：“7·20”特大暴雨 综合物探 探地雷达 高密度电法 常庄水库 

分 类 号：TV62[水利工程—水利水电工程]