挂篮冲击下高速铁路双壁T构桥最大悬臂稳定性分析  

Stability analysis of maximum cantilever of high-speed railway double-wall T-type bridge under the impact of hanging basket

作　　者：温家生 Wen Jiasheng(China Railway 24th Bureau Group Fujian Railway Construction Co.,Ltd.,Fuzhou Fujian 350013,China)

机构地区：[1]中铁二十四局集团福建铁路建设有限公司,福建福州350013

出　　处：《山西建筑》2024年第15期150-154,共5页Shanxi Architecture

基　　金：中铁二十四局科技项目(GY-H-22253)。

摘　　要：随着我国高速铁路线路的不断建成,高速铁路网相互交织,转体施工已成为跨线桥的常用施工方法。以某高速铁路双壁T构桥为例,基于第一类稳定理论,考虑挂篮掉落时的冲击荷载,分析其施工时最大悬臂状态下的稳定性。结果表明:最不利工况下两座T构桥在最大悬臂状态下的承载能力是足够的,在挂篮跌落时不会出现强度不足的问题;同时在挂篮跌落时,其最大悬臂状态的稳定系数远大于规范限值,两座T构桥不会出现稳定性问题。其研究成果可为分析类似T构桥悬臂施工时的稳定状态提供参考。With the continuous development of high-speed railway lines in China,high-speed railway networks are intertwined,and rotation construction has become a common construction method for overpass bridges.This paper takes a high-speed railway double-wall T-type bridge as an example.Based on the first type of stability theory,the impact load when the hanging basket falls is considered,and the stability of the maximum cantilever state in the construction stage is analyzed.The results show that the load bearing capacity of the two T-type bridges in the maximum cantilever state under the most unfavorable conditions is sufficient,and the problem of insufficient strength will not occur when the hanging basket falls;at the same time,when the hanging basket falls,the stability coefficient of the maximum cantilever state is much larger than the code limit,and the two T-type bridges will not have stability problems.The research results of this paper can provide reference for the analysis of the stable question of similar T-frame bridge cantilever construction.

关 键 词：高速铁路 挂篮冲击 T构桥 稳定性分析 最大悬臂状态 

分 类 号：TU997[建筑科学—市政工程] U445.466[建筑科学—桥梁与隧道工程]