Print Email Facebook Twitter Railway ballast layer inspection with different GPR antennas and frequencies Title Railway ballast layer inspection with different GPR antennas and frequencies Author Liu, Guixian (China Academy of Railway Sciences) Peng, Zhan (China Academy of Railway Sciences) Jing, Guoqing (Beijing Jiaotong University) Wang, Shilei (China Academy of Railway Sciences) Li, Yaonan (China Academy of Railway Sciences) Guo, Y. (TU Delft Railway Engineering) Date 2022 Abstract Ground penetrating radar (GPR) is a popular technology for inspecting railway ballast layer, mainly on the ballast fouling level. However, different GPR antennas with different frequencies are suitable for different inspection emphasis and diverse railway lines (weather and sub-structure). In addition, the full-scale track model (with subgrade) for experimental tests was not seen in earlier studies. For further application of GPR in China, the GPR inspections (with 400 MHz, 900 MHz and 2 GHz antennas) were performed on a 30 m long full-scale track and three railway lines (different weather and sub-structure). Results show that ballast layer inspection should be performed mainly with the 2 GHz antenna and supplemented by the 400 MHz and 900 MHz antennas. The weather has great influence on the results of GPR inspection. This study is helpful for supplementing the guidance of ballast layer inspection with GPR. Subject Ballast foulingGPRGround penetrating radarRailway ballastTrack geometryTrack inspection To reference this document use: http://resolver.tudelft.nl/uuid:7311fb79-4215-43be-9c36-0d3e4aebfba9 DOI https://doi.org/10.1016/j.trgeo.2022.100823 ISSN 2214-3912 Source Transportation Geotechnics, 36 Part of collection Institutional Repository Document type journal article Rights © 2022 Guixian Liu, Zhan Peng, Guoqing Jing, Shilei Wang, Yaonan Li, Y. Guo Files PDF 1_s2.0_S2214391222001076_main.pdf 11.13 MB Close viewer /islandora/object/uuid:7311fb79-4215-43be-9c36-0d3e4aebfba9/datastream/OBJ/view