考虑渗漏发展的多期次时移高密度电法模拟探测分析  

Simulation Detection Analysis of Multi-period Time-lapse High-density Resistivity Method Considering Leakage Development

作　　者：朱丽伟 王海军[2] 潘建伍 赵新铭 汪云飞 ZHU Liwei;WANG Haijun;PAN Jianwu;ZHAO Xinming;WANG Yunfei(College of Civil Aviation,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,Jiangsu,China;Nanjing Hydraulic Research Institute,Nanjing 210029,Jiangsu,China;Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,Jiangsu,China)

机构地区：[1]南京航空航天大学民航学院,江苏南京211106 [2]南京水利科学研究院,江苏南京210029 [3]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098

出　　处：《水力发电》2025年第3期37-43,77,共8页Water Power

基　　金：国家重点研发计划专项资助项目(2021YFC3090100,2020YFC1511901)。

摘　　要：渗漏是土石坝常见隐患之一,对其进行精准探测研究具有重要意义。为解决当前探测方法精准度不够、难以监测渗漏的动态变化等问题,提出了一种基于渗流分析的、考虑渗漏发展的时移高密度电法模拟探测新方法,针对实际探测的噪声干扰问题,采用Python编程为模拟探测添加高斯噪声,深入探究随机噪声对时移反演结果的影响与降低噪声影响的措施。研究结果表明:土坝渗漏隐患随时间的发展在多期次时移探测中表现为相对低阻异常变化区规模、形态等特征的变化,并且采集的数据也发生变化,渗漏发展程度与异常区规模和变化的数值大小正相关;可根据多期次间的异常响应特征变化与位置对应性区分噪声导致的虚假异常;初次探测为渗漏发生前的时移反演在减少虚假异常变化区数量和降低噪声影响方面相较于渗漏发生后的情况表现出明显优势。通过研究,不仅得到渗漏发展过程中时移高密度电法多期次探测图像变化规律,还为降低噪声对探测结果的影响提供了有价值的思路。Leakage is one of the common hidden dangers of earth-rock dams,and precise detection research on it is of great significance.To address the issues of insufficient accuracy in current detection methods and difficulty in monitoring dynamic changes in leakage,a new simulation detection method based on time-lapse high-density electrical method considering leakage development and seepage analysis is proposed.At the same time,to address the noise interference in actual detection,Gaussian noise is added to the simulated detection using Python programming,and the impact of random noise on time-lapse inversion results and measures to reduce noise impact are explored in depth.The research results indicate that,(a)the dynamic response characteristics such as the scale,shape,and numerical changes of the relatively low-resistivity anomaly variation zones in the multi-stage time-lapse inversion results can effectively reflect the dynamic evolution trend of leakage hazards;(b)noise may lead to false anomaly zones,which can be distinguished based on changes in anomaly response characteristics and positional correspondence between multiple stages;and(c)the time-lapse inversion before the occurrence of leakage,as the initial detection,shows significant advantages in reducing the number of false anomaly variation zones and mitigating noise impact compared to the situation after the occurrence of leakage.This study not only systematically analyzes the changes in the detection image patterns of the time-lapse high-density electrical method during the multi-stage detection of leakage development,but also provides valuable insights into reducing the impact of noise on detection results.

关 键 词：土石坝 渗漏隐患 高密度电法 多期次时移探测 

分 类 号：TV871.4[水利工程—水利水电工程]