大跨度拱桥拱上连续梁无落地式支撑体系现浇施工技术  

Cast⁃in⁃situ Construction Technology of Non⁃floor Support System for Continuous Beam on Arch of Long⁃span Arch Bridge

作　　者：王海峰 WANG Haifeng(The Civil Construction Engineering Co.,Ltd.of CRECSH Group Co.,Ltd.,Shanghai201906,China)

机构地区：[1]中铁上海工程局集团建筑工程有限公司,上海201906

出　　处：《施工技术（中英文）》2024年第12期140-145,共6页Construction Technology

基　　金：中国中铁股份有限公司重点课题:350km/h无砟轨道高速铁路大跨度上承式提篮拱桥建造关键技术研究(2018-重点-02)。

摘　　要：结合郑万高速铁路奉节梅溪河双线特大桥工程实例,针对大跨度拱桥拱上连续梁现浇施工技术展开研究,通过支撑体系比选、仿真模拟分析、牛腿预压试验,综合考虑墩柱的二阶效应影响,创新设计出无落地式支撑体系。利用既有缆索起重机配合施工,合理筹划施工组织,实现拱上3联连续梁均衡对称现浇及贝雷梁模块化拆除。该技术通过一系列的设计创新和工艺优化,很好地控制了拱桥连续梁施工变形量,保证了施工质量与安全,显著提高工效、降低成本。Combined with the engineering example of Meixi River Double⁃track Super Large Bridge in Fengjie for Zhengzhou⁃Wanzhou High⁃speed Railway,this paper researches on cast⁃in⁃situ construction technology of the continuous beam on arch of long⁃span arch bridge.Through comparison and selection of support systems,simulation analysis,and precompression tests of cow legs,taking into account the second⁃order effect of pier columns,an innovative design of non⁃floor support system is developed.Using existing cable crane to coordinate construction,plan construction organization reasonably,and balanced and symmetrical cast⁃in⁃situ construction of triple continuous beams on the arch is achieved,as well as modular dismantling of Bailey beams.Through a series of design innovations and process optimizations,this technology effectively controls the construction deformation of arch bridge continuous beams of high⁃speed railway,ensuring construction quality and safety,significantly improving work efficiency and saving costs.

关 键 词：桥梁工程 拱桥 连续梁 支撑 现浇 施工技术 

分 类 号：U445.4[建筑科学—桥梁与隧道工程] U448.22[交通运输工程—道路与铁道工程]