论文摘要
Dam surface concrete structure causes certain interference on current transmission path. In order to improve the reliability of electric imaging technology in finding leakage passage, the influence characteristics of three kinds of surface layers on electrical resistivity distribution of dam under complicated environment was studied. Typical dam geoelectric models of hardening layer-bam body soil, water bodyhardening layer-dam body soil and water body-hardening layer-dam body soil were established. The positive inversion numerical calculation was conducted through the finite element method. And then, the effectiveness of detecting the dam through resistivity was discussed. Besides, by combining with the analogue simulation of homogeneous dam hidden dangers, the interference features of thickness of hardening layer, the thickness of the water body on the hazard identification were further accessed. According to the numerical simulation results, hardening layer and water body caused the distortion in electric field propagation path, and brought interference for dam resistivity detection; with the increase of the thickness, the sensitivity of effective signal reduced more obviously, and water body exerted more influence on the result than the hardening layer; based on the comparison of homogeneous dam hidden trouble simulation results, water body-hardening layer-dam body soil conditions, to a certain extent reduced the effective identification of leakage hidden information. Finally, with the combination of the engineering cases, better testing results could be achieved by reasonably optimizing the arrangement of the test system and improving the processing and interpretation methods. The research provide powerful guidance for the field detection construction.
论文目录
文章来源
类型: 国际会议
作者: LAI Sheng,TAN Lei
来源: 第九届世界华人地质科学研讨会 2019-06-01
年度: 2019
分类: 基础科学,工程科技Ⅰ辑,工程科技Ⅱ辑
专业: 地质学,地球物理学,矿业工程,水利水电工程
单位: Zhejiang Institute of Hydraulics & EstuaryZhejiang Provincial Key Laboratory of Water Conservancy Disaster Prevention and ReductionZhejiang Guangchuan Engineering Consulting Co.,Ltd.
分类号: TV698.1;P631.322
DOI: 10.26914/c.cnkihy.2019.028561
页码: 487
总页数: 1
文件大小: 53k
下载量: 1