摘要
大型斜拉桥悬臂钢箱梁在安装过程中受到自身重力、风力、悬臂斜拉索的影响发生振动,应用GPS RTK技术对其动态特性进行实时监测,对桥梁施工控制具有重要意义。结合对某长江公路大桥悬臂钢箱梁安装过程中GPS RTK实测数据,通过对数据必要的预处理与频谱分析,我们看出GPS RTK所采集的数据反映了悬臂钢箱梁的振动状态,监测结果对钢箱梁的安装控制具有一定的指导意义。
Influenced by self gravity,wind and cantilevered stayed cable,cantilevered steel box girder of large-scale cablestayed bridge can vibrate in the installation process,its regime characteristics are in real-time monitoring with GPS RTK technique,and it has important significance for construction control of bridge.Based on the data obtained in cantilevered steel box girder installation process of a Yangtze River highway bridge by GPS RTK,through the necessary pretreatment and spectrum analysis of data,we can see the data obtained with GPS RTK reflects the vibration of the cantilever steel box girder.The monitoring results have certain guiding significance to the installment control of steel box girder.
出处
《勘察科学技术》
2009年第6期49-52,共4页
Site Investigation Science and Technology
关键词
GPS
RTK技术
悬臂钢箱梁
监测
频谱分析
GPS RTK technique
cantilevered steel box girder
monitoring
spectrum analysis
