双跨80 m连续梁悬臂法施工线形控制技术  

Linear Control Technology of Cantilevered Construction Method for Double Span 80 m Continuous Beam

作　　者：叶双双 YE Shuangshuang(Engineering General Institute of Shanghai Construction Group,Shanghai 201114,China)

机构地区：[1]上海建工集团工程研究总院,上海201114

出　　处：《建筑施工》2020年第2期219-221,共3页Building Construction

摘　　要：为保证高速铁路连续梁桥悬臂现浇施工中的线形符合设计要求,以某特大桥的双跨80 m连续梁主跨为例,采用鱼刺图分析法对大跨连续梁的线形影响因素进行了分析。在此基础上,总结了连续梁线形控制的技术难点,并从挂篮锚固系统安装、挂篮预拱度设置、合龙段施工等三方面,阐述了相应的线形控制对策。经实施,双跨80 m连续梁悬臂现浇施工完成后,其外观线形优美、过渡平顺,完全达到了预期的效果,表明所采用的技术控制措施是合理的。In order to ensure that the linearity of the cantilever cast-in-situ construction of the high-speed railway continuous beam bridge can meet the design requirements,taking the main span of the double span 80 m continuous beam of a super large bridge as an example,the fishbone diagram analysis method is used to analyze the influencing factors of the linearity of the long-span continuous beam.On this basis,the technical difficulties of the continuous beam linear control are summarized,and the corresponding linear control countermeasures are expounded from three aspects:the installation of the hanging basket anchoring system,the setting of the hanging basket precamber and the closure section construction.After implementation,the double span 80 m continuous beam has beautiful linear appearance and smooth transition after the completion of the construction,and completely achieves the expected effects,which indicates that the technical control measures adopted are reasonable.

关 键 词：连续梁桥 悬臂现浇 线形控制 预拱度设置 

分 类 号：U445.466[建筑科学—桥梁与隧道工程]