摘要
为快速、有效地确定防渗墙墙体深度、连续性及对可能存在的裂缝、空洞等缺陷位置进行准确定位,需寻找更为快速通用的检测方法。提出先采用电阻率对比法进行快速普查,发现墙体可能存在的缺陷横向位置,再在疑似异常位置利用电阻率CT法或孔中自然电位法进行异常位置的精确定位。电阻率CT数值模拟结果表明:电阻率CT法对防渗墙的缺陷具有较强的敏感性,同时该组合方法受库水位及地面探测条件等限制因素影响较小,具有较强的适用性,可为工程质量的判定提供依据。
In order to quickly and effectively determine the depth and continuity of the cutoff wall,and accurately locate the possible defects such as cracks and voids,it is necessary to find a more rapid and general detection method.In this paper,the resistivity contrast method was used for rapid detection,and the possible defect transverse area of the wall was found.Then,the resistivity CT method or the spontaneous potential method in the hole was used to accurately locate the abnormal position in the suspected abnormal area.The numerical simulation results of resistivity CT method show that resistivity CT has strong sensitivity to the defects of cutoff wall.At the same time,the combined method is less influenced by the reservoir water level and the ground detection conditions,and has strong applicability,which can provide a basis for the determination of engineering quality.
作者
陈兴海
刘盛东
吴小平
周官群
胡雄武
CHEN Xinghai;LIU Shengdong;WU Xiaoping;ZHOU Guanqun;HU Xiongwu(AnhuiHuizhou Geology Security Institute Co.,Ltd.,Hefei 230000,China;School of Resources and Geosciences,China University of Mining and Technology,Xuzhou 221116,China;School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230000,China;School of Earth and Environment,Anhui University of Science and Technology,Huainan 232001,China)
出处
《人民长江》
北大核心
2021年第10期159-164,共6页
Yangtze River
基金
自然资源部地球物理电磁法探测技术重点实验室开放课题(KLGEPT201902)
安徽省自然科学基金项目(2008085QD176)
中国科技大学博士后基金项目(2020M682040)。
关键词
防渗墙
快速无损检测
定位技术
电阻率CT法
自然电位法
cutoff wall
rapid nondestructive detection
location technology
resistivity CT method
spontaneous potential method
numerical simulation
