Study on wavefield characteristics of urban road cavities in 3D GPR data

Abstract

PreviousNext No Access19th International Conference on Ground Penetrating RadarStudy on wavefield characteristics of urban road cavities in 3D GPR dataAuthors: Jianyu LingRongyi QianJianyu LingChina University of Geosciences (Beijing)Search for more papers by this author and Rongyi QianChina University of Geosciences (Beijing)Search for more papers by this authorhttps://doi.org/10.1190/gpr2022-115.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Urban road collapses have occurred frequently in recent years. Therefore, carrying out urban road cavity detection is of great significance. The newly developed 3D GPR has greatly improved the efficiency and accuracy of cavity detection. However, misinterpretation often exists in the 3D GPR data due to the presence of underground facilities. And the cavities formed by various causes show different wavefield characteristics in 3D GPR data. We have carried out 3D GPR detection experiments on urban roads of more than 1000 km in Shenzhen, China. By analyzing a large number of field 3D GPR data, we extracted many abnormal areas and drilled them for inspection. Then the wavefield characteristics of cavities formed by pipe leakage, non dense subgrade backfilling and surface water infiltration in 3D GPR profiles are analyzed. At the same time, we found that the sewage pipe, repaired subgrade and other areas with underground facilities will show similar characteristics to the cavity in the 3D GPR data. The results show that the cavities wavefield characteristics in 3D GPR profiles we summarized can improve the accuracy of data interpretation. Keywords: ground-penetrating radar (GPR), modeling, reflection, diffraction, acquisitionPermalink: https://doi.org/10.1190/gpr2022-115.1FiguresReferencesRelatedDetails 19th International Conference on Ground Penetrating RadarISSN (online):2159-6832Copyright: 2022 Pages: 166 publication data© 2022 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 13 Oct 2022 CITATION INFORMATION Jianyu Ling and Rongyi Qian, (2022), "Study on wavefield characteristics of urban road cavities in 3D GPR data," SEG Global Meeting Abstracts : 79-82. https://doi.org/10.1190/gpr2022-115.1 Plain-Language Summary Keywordsground-penetrating radar (GPR)modelingreflectiondiffractionacquisitionPDF DownloadLoading ...