水泥混凝土路面板下脱空的路面雷达电磁波模拟  

Simulation of Ground Penetrating Radar Electromagnetic Wave Used in Cement Concrete Pavement Void Detection

作　　者：王复明[1] 张蓓[1] 刘俊[2] 

机构地区：[1]郑州大学环境与水利工程学院,郑州市450002 [2]大连理工大学,大连市116024

出　　处：《公路》2007年第4期113-116,共4页Highway

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-探地雷达关键技术研究(0321000800)

摘　　要：建立了路面雷达电磁波在水泥混凝土路面结构中传播的二维时域有限差分(2D-FDTD)方程,并针对空气耦合式天线雷达进行了水泥混凝土路面板下存在脱空病害的路面雷达电磁波模拟。进一步分析了水泥混凝土板下脱空出现水充空洞及气充空洞两种情况的路面雷达回波特性,本文的研究对路面雷达技术应用于水泥混凝土路面脱空病害检测实施具有重要的理论参考意义。In this paper, Two-Dimension Finite Difference Time Domain （2D-FDTD） equations of Ground Penetrating Radar （GPR） electromagnetic wave, which propagates in cement concrete pavements, are established. Then the electromagnetic wave of the air-coupled antenna GPR propagating in the cement concrete pavements with void under slab is simulated by using 2D-FDFD methods and the two GPR echo oroperties are further analyzed. One case is the void is fully filled with water under the cement concrete slab and the other is filled with air. The research lays an important referred significance for using GPR to detect cement concrete pavement void.

关 键 词：路面雷达 刚性路面 二维时域有限差分法 脱空 模拟 

分 类 号：U412.2[交通运输工程—道路与铁道工程]