2012年9月上第41卷第372期
施工技术
CONSTRUCTION TECHNOLOGY
悬索桥上部结构施工中牵引系统转换技术
汪存书"，刘颖"，薛华2
（1.中交二航局第二工程有限公司，重庆401121；2.常州市高逸公路建设指挥部，江苏常州213024）
【摘要】针对泰州长江公路大桥悬索桥主缆索股数量多、跨数多、牵引距离长的特点，深人介绍了该工程上部结构施工中牵引系统转换的施工方法，即采用单线往复式牵引系统架设猫道、双线往复式连续牵引系统架设主缆索股，其中包括过渡索架设，牵引索架设，上、下游侧猫道架设单线往复式牵引系统的形成，索股架设双线往复牵引系统施工技术。事实表明，采用该牵引系统，施工速度快，牵引过程中索股形状保持较好，有效地控制了索股乱丝、呼拉围、扭转等现象的发生。
【关键调】桥梁工程；悬索桥；牵引系统；转换
【中图分类号］TU758;U448.25
【文献标识码】A
【文章编号】1002-8498(2012)17-0021-04
TransferringTechnologyof Hauling System in Superstructure
Constructionof SuspensionBridge Wang Cunshu', Liu Ying', Xue Hua”
(1, The 2nd Engineering Co. , Lad. of CCCC Second Harbour Engineering Co. , Lad. , Chongqing 401121, China;
2.Changzhou Expresway Construction Headquarters, Changzhou, Jiangsu 213024, China)
Abstract: The Taizhou Yangtze River Highway Bridge is featured with large number of cable strands in the main cable, large number of spans and the long hauling distance. The authors introduced the construction method for the transfer of the hauling system during the superstructure construction. Catwalks were erected by single reciprocating hauling system and cable strands of the main cable were erected by double reciprocating continuous-hauling system. This procedure involves the transition cable erecting, hauling cable erecting, construction of the single reciprocating hauling system for catwalk erecting at upstream and downstream.. Construction technology of double reciprocating hauling system. for cable strand erecting was also introduced. The practice shows that this construction method enhances the construction speed, maintains the shape of the cable strands,and effectively stops the occurrence of cable strand floss,hula hoop and torsion.
Key words:bridges; suspension bridges; hauling system; transfer
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工程概况
泰州长江公路大桥主桥为3塔2跨悬索桥，主
桥净宽33m，桥跨布置为（390+1080+1080+ 390）m，主缆失跨比为1/9，两根主缆横向间距 34.8m。牵引系统是悬索桥上部结构施工的重要组成部分，它主要用于猫道架设和主缆索股的架设。泰州长江公路大桥采用4跨连续猫道系统，跨数多，架设距离长，为了提高猫道承重索架设速度，猫道承重索在中塔变位架处分为2段，以中塔为界，南、北猫道承重索由4套（单幅猫道2套）独立单线往
【收精日期】2012-07-06
[作者简介］汪存书，高级工程师，E-mail：wangcusnhus@163.co 万方数据
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复式牵引系统架设。猫道架设完成后，将单线往复式牵引系统进行转换，形成主缆索股架设用的双线往复式牵引系统。
1.1猫道架设单线往复牵引系统
猫道架设单线往复牵引系统是用于猫道承重索、猫道门架承重索、托架承重索、托架定位索、猫道扶手索架设及猫道面网铺设下滑时的拽拉等，一套单线往复牵引系统包括错和中塔处的2台牵引卷扬机、转向导轮、鞍部的转向导轮、边塔顶导轮组、中塔顶导向轮、牵引索（1,2号索）、拽拉器等。总体布置如图1所示。
1.2主缆索股架设双线往复牵引系统
双线往复牵引系统用于主缆索股架设牵引，它