常泰长江大桥主航道桥5号桥塔中塔柱钢筋部品装配化施工关键技术

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中文摘要：常泰长江大桥主航道桥为主跨 1 208m 的公铁两用双塔钢桁梁斜拉桥,5 号桥塔采用钢-混混合空间钻石型桥塔,高 352 m,分为上、中、下塔柱,中塔柱单塔肢为正八边形截面.5 号桥塔中塔柱采用"装配化设计、工业化生产、快速化安装"的钢筋部品装配化施工方案.在钢筋厂内,首先采用研发的钢筋片体和钢筋块体柔性制造生产线进行钢筋片体自动化成型和钢筋块体机械化成型;然后将钢筋块体运输至塔下施工平台,通过步履式组拼胎架组拼成钢筋部品;最后采用塔吊将部品整体吊装上塔,通过锥套锁紧钢筋接头进行快速连接.采用钢筋部品装配化施工技术,减少塔上高空作业人数 60%～70%,降低了劳动强度和高空作业安全风险,每节段塔上钢筋施工时间缩短至 1～1.5 d,提升了钢筋施工效率,塔柱浇筑后钢筋保护层厚度合格率超过 97%,保证了工程施工品质.

外文标题：Key Construction Techniques for Prefabricated Reinforcement in Intermediate Columns of Pylon No.5 of Main Navigational Channel Bridge of Changtai Changjiang River Bridge

外文摘要：The main navigational channel bridge of Changtai Changjiang River Bridge is a steel truss girder,cable-stayed bridge accommodating road and rail traffic.The bridge has two pylons that create a main span of 1 208 m.Rising 352 m,the pylon No.5 is a spatial diamond-shaped steel-concrete hybrid structure that is composed of upper,intermediate,and lower columns.The intermediate columns with octagonal cross-section contain prefabricated reinforcement that were manufactured in the workshop for the ease-of-installation at the bridge site.In the workshop,a flexible manufacturing system was developed to achieve the automated fabrication of the mat reinforcement and the mechanized fabrication of the reinforcement skeletons,respectively.The prefabricated reinforcement was transported to the construction platform below the pylon for assembly with crawler-type jigs.At last,the reinforcement was monolithically hoisted into place using lifting towers,and rapidly connected via locking the joints with cone sleeves.By using the prefabricated reinforcement,the personnel required for overhead pylon construction were reduced by 60%to 70%,alleviating work intensity and overhead working risk.The reinforcement installation for each pylon column was cut down to one day or one and a half days,leading to improved reinforcement installation efficiency.The qualification rate of concrete cover for the reinforcement exceeded 97%,which ensured the construction quality of the project.

外文关键词：

cable-stayed bridgespatial diamond-shaped pylonmat reinforcementreinforcement skeletonprefabricated reinforcementmonolithic hoistingsegmental constructionconstruction technique

作者：

严双桥、吴中正、余昌文

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作者单位：

中交第二航务工程局有限公司,湖北武汉 430040

长大桥梁建设施工技术交通行业重点实验室,湖北武汉 430040

交通运输行业交通基础设施智能制造技术研发中心,湖北武汉 430040

中交公路长大桥建设国家工程研究中心有限公司,湖北武汉 430040

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关键词：

斜拉桥空间钻石型桥塔钢筋片体钢筋块体钢筋部品整体吊装装配化施工施工技术

基金：

中国交通建设股份有限公司科技研发项目

项目编号：

2020-ZJKJ-03

出版年：

2024

DOI：

10.20051/j.issn.1003-4722.2024.04.001

桥梁建设

中铁大桥局集团有限公司

桥梁建设

CSTPCD北大核心

影响因子：1.428

ISSN：1003-4722

年,卷(期)：2024.54(4)