合龙方案对大跨度非对称高铁独塔斜拉桥的影响分析  

Analysis of the Influence of Closure Scheme on Long-Span Asymmetric Single-Tower Cable-Stayed Bridge of High-Speed Railway

作　　者：黄鑫 HUANG Xin(China Railway 19th Bureau Group 2nd Engineering Co.Ltd.,Liaoyang Liaoning 111000,China)

机构地区：[1]中铁十九局集团第二工程有限公司,辽宁辽阳111000

出　　处：《铁道建筑技术》2025年第2期109-112,共4页Railway Construction Technology

基　　金：中铁十九局集团有限公司科技研究开发项目(21-A03)。

摘　　要：为减少施工工序、加快施工进度,目前悬臂施工桥梁经常采用挂篮合龙,与设计图常采用的吊架合龙方案相比桥梁结构在受力和变形上均有一定差别。为研究不同合龙方案对悬臂施工桥梁结构的影响,以沪苏湖高铁跨常台高速及苏嘉运河(35+168+136+35)m非对称独塔部分斜拉桥为背景,结合桥梁结构与施工工序特点,针对吊架合龙及挂篮合龙两种方案进行施工阶段有限元分析,对比研究不同合龙方案下的成桥阶段累计变形及应力状态。结果表明,采用挂篮合龙对累计位移影响较大,在施工中需加强变形监测和预拱度调整。In order to reduce the construction process and speed up the construction progress,the cantilever construction bridge often uses hanging basket closure,compared with the hanger closure scheme often used in the design drawing,the bridge structure has certain differences in force and deformation.To study the influence of different closure schemes on cantilever construction bridge structure,the Shanghai-Suzhou-Huzhou High-speed Railway crossing the Changshu-Taizhou Expressway and Suzhou-Jiaxing Canal(35+168+136+35)m asymmetric single-tower cable-stayed bridge was taken as the background,combined with the characteristics of the bridge structure and construction process,finite element analysis was conducted during the construction phase for two different closure schemes:hanger closure and hanging basket closure,and the cumulative deformation and stress state were compared and studied during the bridge completion phase under different closure schemes.The results indicate that the use of hanging basket closure has a significant impact on cumulative displacement,and it is necessary to strengthen deformation monitoring and pre arch adjustment during construction.

关 键 词：合龙方案 挂篮合龙 吊架合龙 成桥线形 有限元分析 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]