基于北斗自动化监测的大跨度桥梁变形研究  

Research on Large Span Bridge Deformation Based on Beidou Automatic Monitoring

作　　者：唐浩耀 谭社会 金卫锋 李宁 杨兴旺 张献州 TANG Haoyao;TAN Shehui;JIN Weifeng;LI Ning;YANG Xingwang;ZHANG Xianzhou(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China;China Railway Shanghai Group Co.,Ltd.,Shanghai 200071,China;Beijing Cnten Smart Technology Co.,Ltd.,Beijing 100094,China)

机构地区：[1]西南交通大学地球科学与环境工程学院,四川成都611756 [2]中国铁路上海局集团有限公司,上海200071 [3]北京讯腾智慧科技股份有限公司,北京100094

出　　处：《测绘与空间地理信息》2023年第9期103-106,110,共5页Geomatics & Spatial Information Technology

摘　　要：受风、温度和列车荷载等因素影响,高速铁路大跨度公铁大桥空间位置发生改变,直接影响高铁轨道形位。本文分析了不同荷载(温度、风、列车等)最不利状态下桥梁空间位置变化规律。结果显示:温度荷载对于桥梁高程方向影响最大且符合设计;横风对于桥梁横向方向影响最大且桥梁横向变形量约为设计量的一半;不同日期同类型列车通过时,桥梁跨中垂向位移及其恢复时间是基本一致的。Affected by wind,temperature and train load,the spatial position of long-span rail-cum-road bridge changes,which di-rectly affects the track shape and position of high-speed railway.In this paper,the variation law of bridge spatial position under the most unfavorable condition of different loads(temperature,wind,train,etc.)is analyzed.The results show that Beidou automatic monitoring can be applied to the deformation monitoring of long-span bridges;temperature load has the greatest impact on the bridge elevation direction and is in line with the design;the transverse wind has the greatest influence on the transverse direction of the bridge and the transverse deformation of the bridge is about half of the design value;when the same type of train passes on different dates,the vertical displacement and recovery time of the bridge span are basically the same.

关 键 词：自动化监测 大跨度桥梁 变形规律分析 风荷载 温度荷载 列车动荷载 

分 类 号：P228.4[天文地球—大地测量学与测量工程]