高速铁路混凝土梁斜拉桥牵索挂篮设计创新及施工关键技术  

Design Innovation and Key Construction Technology of High⁃Speed Railway Concrete Beam Cable⁃Stayed Bridge Cable Hanging Basket

作　　者：张国永 ZHANG Guoyong(China Railway 11th Bureau Group 1st Engineering Co.Ltd.,Xiangyang Hubei 441104,China)

机构地区：[1]中铁十一局集团第一工程有限公司,湖北襄阳441104

出　　处：《铁道建筑技术》2024年第9期106-109,共4页Railway Construction Technology

基　　金：中国铁建股份有限公司科技研发计划项目(2022-B01)。

摘　　要：针对武宜高铁钟祥汉江特大桥(60+78+270+78+60)m双塔双索面混凝土梁斜拉桥主梁施工时的大节段重量重、牵索挂篮拼装提升难、悬臂施工工效低等问题,通过对牵索挂篮进行系统的创新设计,研发了止推牛腿液压横移装置、止推块预埋件精确定位装置、可分离的牵索挂篮侧模及可调式牵索挂篮行走反滚轮组,提高牵索挂篮就位效率;研发了牵索挂篮异位拼装滑移提升技术,实现了1#节段现浇与挂篮拼装同步作业,缩短工序时间;研发了牵索挂篮悬浇多工序同步作业技术,采用节段钢筋梁下异位整体预制吊装、内模梁下预拼带支架整体吊装工艺,实现牵索挂篮悬臂施工多工序同步作业,提升了施工质量和施工工效。In view of the heavy weight of large segments,the difficulty of assembling and lifting the cable hanging basket and the low ergonomic efficiency of cantilever construction of the main girder of the Zhongxiang Hanjiang Grand Bridge(60+78+270+78+60)m double⁃tower double⁃cable⁃faced concrete cable⁃stayed bridge on Wuhan⁃Shenzhen High⁃speed Railway,through the systematic innovative design of the cable hanging basket,the thrust⁃stop corbel hydraulic traversing device,the precise positioning device of the thrust block embedded parts,the separable cable hanging basket side mold and the adjustable cable hanging basket walking reverse roller set were developed to improve the efficiency of the cable hanging basket in place.The sliding lifting technology of off⁃site assembly of the cable hanging basket had been developed,which realized the synchronous operation of cast⁃in⁃situ and cable hanging basket assembly of 1#segments,and shortened the process time.The multi⁃process synchronous operation technology of suspension and pouring of the cable hanging basket was developed,and the off⁃site overall prefabricated hoisting technology of the integral hoisting under the segmental reinforcement beam and the overall hoisting process of the pre⁃assembled bracket under the inner mold beam were adopted to realize the synchronous operation of the multi⁃process cantilever construction of the cable hanging basket,and the construction quality and construction ergonomics were improved.

关 键 词：高速铁路 斜拉桥 混凝土梁 牵索挂篮 

分 类 号：U445.466[建筑科学—桥梁与隧道工程]