伶仃洋大桥桥塔中横梁施工关键控制技术  

Construction Techniques for Middle Cross Beams of Cable Towers of Lingdingyang Bridge

作　　者：袁航 肖翀 严晨曦 YUAN Hang;XIAO Chong;YAN Chen-xi(CCCC Second Harbor Engineering Company Ltd.,Wuhan 430014,China;Key Laboratory of Large-span Bridge Construction Technology,Wuhan 430014,China;CCCC Highway Bridge National Engineering Research Centre Co.Ltd.,Beijing 100011,China)

机构地区：[1]中交第二航务工程局有限公司,武汉市430014 [2]长大桥梁建设施工技术交通行业重点实验室,武汉市430014 [3]中交公路长大桥建设国家工程研究中心有限公司,北京市100011

出　　处：《公路》2022年第6期78-83,共6页Highway

基　　金：国家重点研发计划专项资助项目,项目编号2017YFC0805304。

摘　　要：以深中通道悬索桥伶仃洋大桥为背景,针对塔梁同、异步施工及中横梁施工过程的支撑体系进行分析与比选,详细论述伶仃洋大桥中横梁牛腿托架支撑结构体系设计、托架的安装与预压等关键技术,并针对混凝土与支架之间进行受力分析,确定采用中横梁混凝土分层浇筑、预应力分层张拉总体施工方案,克服了中横梁施工过程高度高、跨径大、重量重等系列问题,实现了桥塔横梁施工安全、质量及效益等方面大幅提升。Taking the suspension bridge Lingdingyang Bridge of Shenzhen-Zhongshan Link as the background, the tower beam synchronous and asynchronous construction and middle cross beam beam support system are analyzed and compared. The key technologies such as the design of the support structure of the middle beam supporting bracket, the installation and pre-compression of the bracket are discussed. According to the force analysis between the concrete and the support, the construction plan of layered concrete pouring for the middle cross beam and layered tensioning of prestressing is adopted, which overcomes the problems of high height, large span, and heavy weight during the construction of the middle cross beam, and the construction safety, quality and efficiency are greatly improved.

关 键 词：悬索桥 异步施工 中横梁 托架 

分 类 号：U443.38[建筑科学—桥梁与隧道工程] U445.4[交通运输工程—道路与铁道工程]