Deformation monitoring of long-span railway bridges based on SBAS-InSAR technologyOA北大核心
Deformation monitoring of long-span railway bridges based on SBAS-InSAR technology
The deformation monitoring of long-span railway bridges is significant to ensure the safety of human life and property.The interferometric synthetic aperture radar(InSAR)technology has the advantage of high accuracy in bridge deformation monitoring.This study monitored the deformation of the Ganjiang Super Bridge based on the small baseline subsets(SBAS)InSAR technology and Sentinel-1A data.We analyzed the deformation results combined with bridge structure,temperature,and riverbed sediment scouring.The results are as follows:(1)The Ganjiang Super Bridge area is stable overall,with deformation rates ranging from-15.6 mm/yr to 10.7 mm/yr(2)The settlement of the Ganjiang Super Bridge deck gradually increases from the bridge tower toward the main span,which conforms to the typical deformation pattern of a cable-stayed bridge.(3)The sediment scouring from the riverbed cause the serious settle-ment on the bridge's east side compared with that on the west side.(4)The bridge deformation nega-tively correlates with temperature,with a faster settlement at a higher temperature and a slow rebound trend at a lower temperature.The study findings can provide scientific data support for the health monitoring of long-span railway bridges.
Lv Zhou;Xinyi Li;Yuanjin Pan;Jun Ma;Cheng Wang;Anping Shi;Yukai Chen
College of Geomatics and Geoinformation,Guilin University of Technology,Guilin 541004,China||Hubei LuoJia Laboratory,Wuhan 430079,China||Ecological Spatiotemporal Big Data Perception Service Laboratory,Guilin 541004,ChinaHubei LuoJia Laboratory,Wuhan 430079,China||School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,ChinaChina Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,ChinaCollege of Geomatics and Geoinformation,Guilin University of Technology,Guilin 541004,China
SBAS-InSARLong-span railway bridgeDeformation monitoringBridge structureTime series deformation
《大地测量与地球动力学（英文版）》 2024 (002)
122-132 / 11
This work was supported by the National Natural Science Foundation of China(Grant Nos.42264004,42274033,and 41904012),the Open Fund of Hubei Luojia Laboratory(Grant Nos.2201000049 and 230100018),the Guangxi Universities'1,000 Young and Middle-aged Backbone Teachers Training Program,the Fundamental Research Funds for Central Universities(Grant No.2042022kf1197),the Natural Science Foundation of Hubei(Grant No.2020CFB282),and the China Postdoctoral Science Foundation(Grant Nos.2020T130482,2018M630879).
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