高服役期钢桁梁桥拆除方案设计及实测分析  

Analysis on Scheme Design and Actual Testing for the Demolition of Steel Truss Bridge in the High Service Period

作　　者：徐步齐 XU Buqi(China Railway 12th Bureau Group 7th Engineering Co.Ltd.,Changsha Hunan 410004,China)

机构地区：[1]中铁十二局集团第七工程有限公司,湖南长沙410004

出　　处：《铁道建筑技术》2024年第12期84-87,共4页Railway Construction Technology

基　　金：中铁十二局集团有限公司科技研发计划项目(2023-17)。

摘　　要：桥梁顶推拆除对梁体刚度和稳定性有较高要求。为保证高服役期钢桁梁桥顺利拆除,以珠江东桥为例,设计提出简支梁桥变连续梁桥体系转换后再顶推的整体拆除方案。同时,对体系转换过程中桥梁加固措施和顶推过程控制措施进行详细阐述,并结合现场监控量测数据对钢桁梁不同状态下的竖向位移和应力状态进行分析。结果表明,桥梁结构在拆除过程中其位移及应力均在可控范围,该方案可满足主体拆除工作的顺利进行。The jacking demolition of the bridge has higher requirements on the stiffness and stability of the beam.In order to ensure the smooth demolition of the steel truss bridge in the high service period,this paper takes the Pearl River East Bridge as an example,and designs an overall demolition scheme of converting the system of the simply supported beam to the continuous beam and then jacking.At the same time,the reinforcement measures in the system transformation process and the control measures in the jacking process are described in detail,and the vertical displacement and stress state of the steel truss beam under different conditions are analyzed in combination with the specific data of the on-site monitoring and measurement.The results show that the displacement and stress of the bridge structure during the demolition process are within the controllable safety range,and the scheme can meet the smooth demolition of the main body.

关 键 词：简支变连续 顶推拆除 方案设计 施工监控 

分 类 号：U445.6[建筑科学—桥梁与隧道工程]