| 230 | 0 | 101 |
| 下载次数 | 被引频次 | 阅读次数 |
城市地下病害体探测已成为城市地面塌陷防治的有效手段，探地雷达作为常用的探测方法被广泛应用。本文基于GprMax开展探地雷达数据正演模拟，系统分析了不同情况空洞的雷达图谱特征。正演出的单道波形图和二维剖面图结果表明：方形空洞反射波呈“似平板状”并伴生绕射波，尺寸增大时下方多次波显著增强，介质属性可以直接影响反射相位特征，富水空洞呈现“黑白黑”而充气空洞表现为“白黑白”;与干燥空洞相比，排水管线的存在会使波形能量明显减弱；针对城市道路0.3～2 m典型病害埋深，400 MHz的雷达设备较100 MHz和200 MHz具有更优的分辨能力。同时，结合实际工程案例，通过对比发现，正演模拟图谱与实测图谱变化形态基本一致，可为地下病害识别精度提升提供理论支撑和技术依据。
Abstract：The detection of urban underground disease bodies has become an effective means for the prevention and control of urban ground collapse, with ground penetrating radar(GPR) being widely used as a common detection method. This paper presents forward simulation of GPR data based on GprMax and systematically analyzes the radar map characteristics of cavities under different conditions. The results of the forward simulation(single-channel waveforms and two-dimensional profile) show that: the reflection wave from a square cavity is ‘flat-like' and accompanied by diffraction waves; the multiple wave intensity significantly increases when the size increases; the properties of the medium can directly affect the reflection phase characteristics; a water-rich cavity presents a ‘black-white-black' waveform, and an inflatable cavity presents a ‘white-black-white' waveform. Compared with a dry cavity, the existence of a drainage pipeline significantly weakens the waveform energy. For the typical defect burial depth of 0.3～2 m in urban roads, a 400MHz antenna has better resolution capability than that of a 100 MHz and a 200 MHz antenna. Furthermore, combined with an actual engineering case, comparative analysis shows that the forward simulation map and the measured map exhibit basically consistent morphological variations, which can provide theoretical support and a technical basis for improving the accuracy of underground disease identification.
[1] 赵明堂.地质雷达技术在城市地面塌陷隐患调查中的应用[J].工程地球物理学报，2019,16(6):904-909.Zhao M T.Application of ground penetrating radar to investigation of hidden danger of urban ground collapse[J].Chinese Journal of Engineering Geophysics,2019,16(6):904-909.
[2] 赵镇，黄勇，冯昆.三维探地雷达在道路检测中的研究与应用[J].测绘通报，2024(2):148-152.Zhao Z,Huang Y,Feng K.Research and application of 3D ground penetrating in road detection[J].Bulletin of Surveying and Mapping,2024(2):148-152.
[3] 许泽善，简世凯，覃谭，等.探地雷达在道路脱空空洞病害检测中的应用[J].工程地球物理学报，2019,16(1):116-125.Xu Z S,Jian S K,Qin T,et al.Application of ground penetrating radar in road detachment and cavity detection[J].Chinese Journal of Engineering Geophysics,2019,16(1):116-125.
[4] 刘康.探地雷达技术在城市道路病害体探测中的应用[J].城市勘测，2023(增刊1):97-101.Liu K.Application of ground penetrating radar technology in detection of urban road diseases[J].Urban Geotechnical Investigation & Surveying,2023(S1):97-101.
[5] 杨金瑞，崔亚彤，李金伟，等.地质雷达FDTD数值模拟在城市道路探测中的应用[J].勘察科学技术，2024(4):53-58.Yang J R,Cui Y T,Li J W,et al.Application of FDTD numerical simulation of ground penetrating radar in urban road detection[J].Site Investigation Science and Technology,2024(4):53-58.
[6] 胡坪伸，王新红，张秉来，等.次生黄土介质环境地下管线雷达探测正演模拟及实践[J].工程地质学报，2024,32(2):590-600.Hu P S,Wang X H,Zhang B L,et al.Forward modeling and practice of pipeline detection in secondary loess environment[J].Journal of Engineering Geology,2024,32(2):590-600.
[7] 张迪，莫其妙.基于GprMax的地下管线探地雷达图像正演模拟[J].工程地球物理学报，2022,19(2):168-182.Zhang D,Mo Q M.Forward modeling of GPR image based on GprMax[J].Chinese Journal of Engineering Geophysics,2022,19(2):168-182.
[8] 李世念，王秀荣，林恬，等.基于GprMax的道路空洞三维探地雷达正演数值模拟[J].中国地质灾害与防治学报，2020,31(3):132-138.Li S N,Wang X R,Lin T,et al.Numerical simulation of 3D ground penetrating radar based on GprMax for the road cavity[J].The Chinese Journal of Geological Hazard and Control,2020,31(3):132-138.
[9] 孙鹏博.基于FDTD的探地雷达管线探测正演模拟研究[D].北京：中国地质大学(北京),2020.Sun P B.Forward modeling research of ground penetrating radar pipeline detection based on FDTD[D].Beijing:China University of Geosciences,2020.
[10] 索明康.探地雷达信号处理及反演方法研究[D].哈尔滨：哈尔滨工业大学，2021.Suo M K.Research on signal processing and inversion methods of ground penetrating radar[D].Harbin:Harbin Institute of Technology,2021.
[11] 张洪熙.探地雷达正演模拟与全波形反演成像[D].北京：中国地质大学(北京),2021.Zhang H X.Forward modeling and full waveform inversion imaging of ground penetrating radar[D].Beijing:China University of Geosciences,2021.
[12] 张军伟，刘秉峰，李雪，等.基于GPRMax2D的地下管线精细化探测方法[J].物探与化探，2019,43(2):435-440.Zhang J W,Liu B F,Li X,et al.Refined detection method of underground pipeline based on GPRMax2D[J].Geophysical and Geochemical Exploration,2019,43(2):435-440.
[13] 雷勤梅，李颖.地质雷达管线探测正演模拟研究[J].工程地球物理学报，2019,16(3):402-414.Lei Q M,Li Y.Research for the simulation of GPR in the municipal pipelines detection[J].Chinese Journal of Engineering Geophysics,2019,16(3):402-414.
[14] 曾昭发，刘四新，冯晅，等.探地雷达原理与应用[M].北京：电子工业出版社，2010.Zeng Z F,Liu S X,Feng X.Principle and application of ground penetrating radar[M].Beijing:Publishing House of Electronics Industry,2010.
[15] Giannopoulos A.Modelling ground penetrating radar by GprMax[J].Constructionand Building Materials,2005,19(10):755-762.
[16] Gedney S D.An anisotropic perfectly matched layer-absorbing medium for the truncation of FDTD lattices[J].IEEE Transactions on Antennasand Propagation,1996,44(12):1 630-1 639.
[17] Berenger J P.Three-dimensional perfectly matched layer for the absorption of electromagnetic waves[J].Journal of Computational Physics,1996,127(2):363-379.
[18] Yee K.Numerical solution of initial boundary value problems involving Maxwell’s equations in isotropic media[J].IEEE Transactions on Antennas and Propagation,1966,14(3):302-307.
[19] 陈婕.基于GprMax3.0的探地雷达混凝土空洞目标正演模拟与试验分析[D].长沙：长沙理工大学，2018.Chen J.Forward simulation and data analysis of GPR for the concrete cavity based on GprMax3.0[D].Changsha:Changsha University of Science & Technology,2018.
[20] 石旭飞，代雅建，崔健，等.沈阳城市地质环境问题研究[J].地质与资源，2017,26(4):390-396.Shi X F,Dai Y J,Cui J,et al.Study on the geological environment of Shenyang city[J].Geology and Resources,2017,26(4):390-396.
基本信息:
中图分类号:P631.3
引用信息:
[1]夏思茹,崔亚彤,张恒兵,等.基于GprMax的探地雷达正演模拟及病害体探测分析[J].工程地球物理学报,2025,22(06):599-606.
基金信息:
国家自然科学基金面上项目(编号：41974101)