摘要
堤坝涵管接触冲刷破坏是堤坝工程最常见的险情之一,具有难以察觉、破坏突然和危害性大的特点,为实现堤坝涵管与土体结合部位的有效探测,研究采用时移3D高密度电法追踪探测、判断接触渗漏。在探讨时移3D高密度电法正演、反演理论和观测装置类型的基础上,结合工程实际应用,开展了注水前后连续3D电阻率探测试验,引入电阻率反射系数R,分析了注水前后不同时刻结合部位电阻率的变化规律。试验结果表明,电阻率低阻异常响应与结合部位松散不密实区之间具有良好的对应关系,可实现对结合部位接触渗漏的有效探测。
The contact erosion damage of dam culvert is one of the most common dangerous conditions in dam engineering,which has the characteristics of difficult to detect,sudden damage and great harm.In order to realize the effective detection of the joint part of dam culvert and soil,the time⁃lapse 3D high density resistivity method was used to detect and judge the contact leakage.Based on the discussion of for⁃ward modeling,inversion theory and observation device types of time⁃lapse 3D high⁃density resistivity method,combined with the practical application of engineering,the continuous 3D resistivity detection test before and after water injection was carried out,and the resistivity re⁃flection coefficient R was introduced to analyze the development and change law of the resistivity change at the junction in different times be⁃fore and after water injection.The test results show that there is a good corresponding relationship between the low⁃resistivity abnormal re⁃sponse and the loose and non⁃dense area of the joint,which can realize the effective detection of the contact leakage of the joint.
作者
张清明
徐帅
王锐
周杨
ZHANG Qingming;XU Shuai;WANG Rui;ZHOU Yang(Yellow River Institute of Hydraulic Research,YRCC,Zhengzhou 450003,China;Research Center on Levee Safety Disaster Prevention,MWR,Zhengzhou 450003,China;Yellow River Water Resources Protection Scientific Research Institute,Zhengzhou 450004,China)
出处
《人民黄河》
CAS
北大核心
2021年第12期135-138,共4页
Yellow River
基金
水利重大科技问题研究专项(201911)
中央级公益性科研院所基本科研业务费专项(HKY-JBYW-2019-15,HKY-JBYW-2020-31)。
关键词
堤坝涵管
时移3D高密度电法
接触渗漏
dam culvert pipe
time⁃lapse 3D high density resistivity method
contact leakage
