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WU Xueli,JIA Jiangbo,MENG Fanhua,LI Sukang,ZHANG Haohao.Forward modeling of seepage of reservoir dam based on ground penetrating radar[J].Journal of Hebei University of Science and Technology,2017,38(4):389-394
基于探地雷达的水库坝基渗漏正演模拟
Forward modeling of seepage of reservoir dam based on ground penetrating radar
Received:April 20, 2017  Revised:June 08, 2017
DOI:10.7535/hbkd.2017yx04011
中文关键词:  空间物理探测  探地雷达  水库大坝  Yee网格  正演模拟
英文关键词:space physics detection  GPR  reservoir ram  Yee grid space  forward modeling
基金项目:石家庄市科技攻关项目(141131371A)
Author NameAffiliationE-mail
WU Xueli School of Electrical Engineering Hebei University of Science and Technology ShijiazhuangHebei Provincial Research Center for Technologies in Process Engineering Automation Shijiazhuang wuxueli@hebust.edu.cn 
JIA Jiangbo School of Electrical Engineering Hebei University of Science and Technology ShijiazhuangHebei Provincial Research Center for Technologies in Process Engineering Automation Shijiazhuang  
MENG Fanhua School of Electrical Engineering Hebei University of Science and Technology ShijiazhuangHebei Provincial Research Center for Technologies in Process Engineering Automation Shijiazhuang  
LI Sukang Shijiazhuang Jiaxin Electric Company Limited Shijiazhuang  
ZHANG Haohao School of Electrical Engineering Hebei University of Science and Technology ShijiazhuangHebei Provincial Research Center for Technologies in Process Engineering Automation Shijiazhuang  
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中文摘要:
      水库坝基渗水将带来溃堤的风险,造成水资源浪费及生命财产的损失,针对现有技术无法确定坝体渗水洞坐标的实际情况,提出采用探地雷达对坝体进行日常检测。利用时域有限差分法(FDTD)对在二维空间进行FDTD按照Yee氏网格离散处理的原理,得到其电磁分布方程,基于水库坝基的实际构造,建立了空气层、混凝土层、黏土层及两个渗水洞的理想模型,并依据理想模型建立了带有石灰岩干扰点的混凝土层干扰模型。利用MATLAB实现系统架构,并进行正演模拟。结果显示:探地雷达可以用于较深目标体探测,通过改变探地雷达电磁波中心频率,并对比50,100和200 MHz三种频率雷达电磁波的检测频谱,又对带干扰模型进行了模拟,验证了100 MHz频率雷达电磁波,用于复杂地形的检测效果更优。
英文摘要:
      The risk of the reservoir dam seepage will bring the waste of water resources and the loss of life and property. The ground penetrating radar (GPR) is designed as a daily inspection system of dams to improve the existing technology which can't determine the actual situation of the dam seepage tunnel coordinates. The finite difference time domain (FDTD) is used to solve the Yee's grids discreatization in two-dimensional space, and its electromagnetic distribution equation is obtained as well. Based on the actual structure of reservoir dam foundation, the ideal model of air layer, concrete layer, clay layer and two water seepage holes is described in detail, and the concrete layer interference model with limestone interference point is established. The system architecture is implemented by using MATLAB, and the forward modeling is performed. The results indicate that ground penetrating radar can be used for deep target detection. Through comparing the detection spectrum of three kinds of frequency electromagnetic wave by changing the center frequency of the GPR electromagnetic wave of 50 MHz, 100 MHz and 200 MHz, it is concluded that the scanning result is more accurate at 100 MHz. At the same time, the simulation results of the interference model show that this method can be used for the detection of complex terrain.
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