道路路基脱空病害雷达波场数值模拟与瞬时属性分析  

Numerical Simulation and Instantaneous Attribute Analysis of Ground Penetring Radar Wave Field for Road Subgrade Void Disease

作　　者：隋昕展 杜衍庆 师海 王新岐 孙子冰 刘晨阳 SUI Xin-zhan;DU Yan-qing;SHI Hai;WANG Xin-qi;SUN Zi-bing;LIU Chen-yang(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Tianjin Municipal Engineering Design and Research Institute Co.Ltd.,Tianjin 300392,China;Key Laboratory of Track Engineering,Beijing 100044,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]天津市政工程设计研究总院有限公司,天津300392 [3]轨道工程北京市重点实验室,北京100044

出　　处：《科学技术与工程》2024年第2期782-788,共7页Science Technology and Engineering

基　　金：天津市交通运输科技发展计划(2019B-25);国家自然科学基金(41907260,42172311);河北省省级科技计划项目-社会公共事业创新专项(21375408D)。

摘　　要：针对道路路基脱空病害的快速识别,采用时间域有限差分法进行病害的雷达波长数值模拟,模拟了脱空病害不同大小、长度、位置及填充的差异,并通过图像增益和复信号分析技术提取雷达波场的振幅、相位和频率等瞬时属性特征,分析了不同脱空地质的雷达波场响应特征。研究结果表明:根据路基脱空病害的地质雷达瞬时振幅图像和单道波归一化幅值可推算出脱空病害上界面信息和脱空区域介质类型;根据充气脱空病害和充水脱空病害瞬时相位图像特征,可判断出路基结构层间信息和脱空病害区域和边界位置;根据充水脱空病害和充气脱空病害瞬时频率图像,可判断出高频和低频电磁波存在位置。此外,根据充水脱空病害单道波瞬时频率图,可得到正向电磁波存在位置,并作为脱空病害下界面位置判断依据。研究成果可为道路病害的智能识别和快速判识提供理论依据。In order to identify subgrade void disease quickly,the time domain finite difference method was used to numerically simulate the radar wavelength of the void disease's differences in size,length,location,and fill.Additionally,image enhancement techniques and complex signal analysis methods were applied to extract the instantaneous attributes of the radar wave field,such as amplitude,phase,and frequency.The radar wave field response characteristics of different debonding geologies were analyzed.The results show that the information concerning the upper interface of the subgrade void disease and the medium type of the void area can be calculated from the instantaneous amplitude images of the geological radar for subgrade void disease and single-channel wave normalized amplitudes.According to the instantaneous phase image characteristics of air-filled and water-filled void disease,the interlayer information of roadbed structure and the location and boundary of void disease area can be judged.According to the instantaneous frequency images of water-filled void disease and air-filled void disease,the positions of the high-frequency and low-frequency electromagnetic waves can be judged.In addition,according to the transient frequency images of single-channel waves of water-filled void disease,the location of forward electromagnetic waves can be obtained and used as the basis for judging the locations of the lower interface of void disease.The research results can provide a theoretical basis for the intelligent identification and rapid diagnosis of road diseases.

关 键 词：脱空病害 数值模拟 瞬时属性 时间域有限差分法 病害识别 

分 类 号：U41[交通运输工程—道路与铁道工程]