沥青路面剥落的路面雷达电磁波模拟  

Simulation of Ground Penetrating Radar Electromagnetic Wave Propagation in Asphalt Pavement with Stripping

作　　者：张蓓[1] 王复明[1] 刘俊[2] 

机构地区：[1]郑州大学水利与环境学院,河南郑州450002 [2]大连理工大学土木水利学院,辽宁大连116024

出　　处：《公路交通科技》2008年第4期7-10,共4页Journal of Highway and Transportation Research and Development

基　　金：国家杰出青年科学基金资助项目(19625205);河南省杰出人才创新基金资助项目(0321000800)

摘　　要：针对空气耦合式雷达,建立了路面雷达电磁波在沥青路面结构中传播的二维时域有限差分(2D-FDTD)方程,并进行了沥青路面面层中存在沥青剥落病害的路面雷达电磁波模拟。模拟结果表明:当沥青路面出现沥青剥落区域后,在路面雷达回波的面层界面和基层界面的正反射波中间出现一负反射波,沥青剥落位置决定着该负反射波将会出现在面层界面反射波和基层界面反射波之间的位置;并且随着沥青剥落区域的竖向厚度增加,该负反射波波幅增大。为利用路面雷达快速检测路面沥青剥落病害提供了理论基础。The two-dimension finite difference time domain （2D- FDTD） equations for air-coupled Ground Penetrating Radar （GPR） electro-magnetic （EM） wave propagation in asphalt pavements were established, and the EM wave propagation in asphalt pavement with stripping was simulated by using the 2D- FDFD method.The simulation results indicate that there will be a negative reflected wave comes forth between the positive base reflected wave and sub-base reflected wave when the distress of stripping appears to asphalt pavement, and the location of the negative reflected wave is decided by the location of the stripping area. Meanwhile, the amplitude of the negative reflected wave enlarges with the increasing of the vertical thickness of the stripping area.

关 键 词：道路工程 沥青路面 二维时域有限差分法 沥青剥落 路面雷达(GPR) 电磁波模拟 

分 类 号：U416.217[交通运输工程—道路与铁道工程] TN814.01[电子电信—信息与通信工程]