Alignment monitoring is an effective measure to ensure the safe operation of long span rail-cum-road bridge.Bridge deformation monitoring based on terrestrial surveying has long monitoring cycles and heavy workloads,making it difficult to achieve real-time monitoring due to limitations in monitoring frequency.In view of this,an automated bridge alignment monitoring technology based on GNSS(Global Navigation Satellite System)as the core of multi-source sensor data was in this paper.Through its application in the kilometer-level span of the Shanghai-Suzhou-Hangzhou Rail-cum-Road Yangtze River Bridge,it demonstrates that the monitoring scheme is reasonable and feasible,with an accuracy reaching the centimeter level(horizontal±15 mm,elevation±30 mm).It has the advantages of all-weather real-time monitoring,instantaneous extreme value monitoring,and alarm capabilities,providing technical support for routine maintenance.
关键词
公铁两用桥梁/自动化监测/试验研究/桥梁动态线形/GNSS动态相对定位
Key words
rail-cum-road bridge/automated monitoring/experimental research/dynamic alignment of bridges/GNSS dynamic relative positioning
维普
万方数据