长江科学院院报2019，Vol.36Issue(2)：97-100,105,5.DOI:10.11988/ckyyb.20170790
基于双电极法的土工膜缺陷探测数值模拟
Numerical Simulation of Defect Detection of Geomembrane Based on Dual-electrode Method
岑威钧 1罗佳瑞 2都旭煌 1和浩楠 1耿利彦3
作者信息
- 1. 河海大学 水利水电学院,南京 210098
- 2. 水利部堤防安全与病害防治工程技术研究中心,郑州 450003
- 3. 河北省水利水电第二勘测设计研究院,石家庄 050021
- 折叠
摘要
Abstract
In the light of the similarity of governing equation and boundary condition between electric field and seep-age field, the potential distribution on the surface of defective impermeable geomembrane was simulated via finite element approach. The anomaly potential distributions in the vicinity of defect were obtained to determine the loca-tion of defect. In addition, sensitivity analysis of the buried position of electrode, excitation voltage, and dipole spacing were taken into account. The computed results demonstrate that the defect in the geomembrane can be accu-rately located by using pole-dipole electrical survey methods. The detection of defect is more effective for a closer distance between the defect and the electrode; the detection efficiency can be increased when the detective line is along the center line of defect. The results also show that the dipole spacing of 5%-10% of the length of survey line is appropriate for detecting the defect in geomembrane. The calculated results are of theoretical guiding significance for the application of pole-dipole electrical survey methods to the detection of geomembrane defect.关键词
土工膜/缺陷探测/电极位置/探测间距/数值模拟Key words
geomembrane/defect detection/location of electrode/detection distance/numerical simulation分类
建筑与水利引用本文复制引用
岑威钧,罗佳瑞,都旭煌,和浩楠,耿利彦..基于双电极法的土工膜缺陷探测数值模拟[J].长江科学院院报,2019,36(2):97-100,105,5.
