Abstract:We use ground-based RAR mode and ground-based SAR mode to monitor longitudinal vertical deformation of railway bridges as the train passes by. The experimental results show that: 1) the deformation trends and deflection are basically consistent between the two modes. Moreover, the RAR mode and SAR mode corresponding monitoring point of longitudinal vertical deflection deformation precision maximum deviation is 1.85 mm. Through external verification and analysis, both RAR and SAR modes can realize millimeter level deformation monitoring of the bridge. 2) RAR mode has fast and simple data processing, which has real-time processing and visualization capability. SAR mode has a relatively large amount of data, so it is technically difficult to process the data, but it can reflect the trend of planar deformation at the same time and has the ability to capture deformation of the object. SAR mode can also extract the deformation of feature point, lines and planes.
LIU Wenting,LONG Sichun,ZHANG Yuxuan et al. Comparative Experiment of Ground-Based SAR and Ground-Based RAR Mode Deformation Monitoring[J]. jgg, 2021, 41(10): 1076-1079.