大跨径悬索桥猫道架设控制技术
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摘要
猫道作为悬索桥上部构造施工必不可少的工作通道,其结构构成主要由猫道承重索、猫道面层、栏杆及扶手、抗风系统、门架系统﹑横向通道及各锚固连接等构成。猫道是悬索桥主缆系统乃至上部结构施工必备的临时结构,是施工人员在其上完成主缆架设、索夹和吊索安装、钢箱梁吊装、主缆缠丝及防护涂装等施工任务的重要操作平台。由于猫道处于高空,系统组成构件多,结构复杂,且使用周期长,架设过程受环境影响大、施工难度大、危险程度高,为保证猫道架设线形与施工过程的安全,合理的施工工艺及有效的安全控制措施是关键,对于猫道架设线形控制,采用承重索长度调整系统,猫道线形调整系统,锚碇处的锚固系统,塔顶的固定及调整装置等多种调节系统和高精度徕卡全站仪,对猫道的线型控制尤为重要。
As essential working tunnel for upper structure of suspension bridge,catwalk is mainly composed of bearing cable,catwalk surface,handrail,grab rail,wind resist system,gate system,horizontal channel,and anchor connections. Catwalk is the indispensable temporary structure for construction of main cable of suspension bridge even upper structure. Catwalk is the important operation platform for installation of main cable and cable clips and suspenders,hoisting of steel box girder,main cable wire wrapping,and coating protection. Due to the catwalk has the features of high above the ground,system complex and long time using,the installation process is highly influenced by environment,difficult and dangerous construction,in order to ensure its geometry and construction safety,reasonable construction method and efficient safety measure are key points. For the geometry control,some kinds of adjustment system like cable adjustment system,catwalk geometry adjustment system,anchorage system,pylon top fixing and adjustment system,and Leica total station instrument are adopted,which are more important for controlling catwalk geometry. are indispensable.
As essential working tunnel for upper structure of suspension bridge,catwalk is mainly composed of bearing cable,catwalk surface,handrail,grab rail,wind resist system,gate system,horizontal channel,and anchor connections. Catwalk is the indispensable temporary structure for construction of main cable of suspension bridge even upper structure. Catwalk is the important operation platform for installation of main cable and cable clips and suspenders,hoisting of steel box girder,main cable wire wrapping,and coating protection. Due to the catwalk has the features of high above the ground,system complex and long time using,the installation process is highly influenced by environment,difficult and dangerous construction,in order to ensure its geometry and construction safety,reasonable construction method and efficient safety measure are key points. For the geometry control,some kinds of adjustment system like cable adjustment system,catwalk geometry adjustment system,anchorage system,pylon top fixing and adjustment system,and Leica total station instrument are adopted,which are more important for controlling catwalk geometry. are indispensable.
引文
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[8]王中文,朱宏平,钟建锋,等.大跨度悬索桥猫道抗风设计与施工[J].桥梁建设,2009,39(2):65-68.WANG Zhong-wen,ZHU Hong-ping,ZHONG Jian-feng,et al.Wind Resist Design and Construction of Catwalk in Long Span Suspension Bridge[J].Bridge Construction,2009,39(2):65-68.
[9]韦世国,薛光雄,沈良成.润扬大桥悬索桥猫道系统设计与施工[J].桥梁建设,2004,34(3):29-35.WEI Shi-guo,XUE Guang-xiong,SHEN Liang-cheng.Catwalk System Design and Construction of Run Yang Bridge[J].Bridge Construction,2004,34(3):29-35.
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[2]董红伟,袁志宏,殷广月.万州长江二桥猫道结构施工设计[J].辽宁交通科技,2005,13(5):58-60.DONG Hong-wei,YUAN Zhi-hong,YIN Guang-yue.Catwalk Structure Construction Design of Wanzhou Second Yangtze River Bridge[J].Liaoning Communications Science and Technology,2005,13(5):58-60.
[3]韦壮科,彭春阳,卢士鹏,等.自锚式悬索桥空间索面猫道架设与调整[J].桥梁建设,2008,38(5):46-48.WEI Zhuang-ke,PENG Chun-yang,LU Shi-peng,et al.Spatial Surface Catwalk Setting Out and Adjustment in Self-anchor Suspension Bridge[J].Bridge Construction,2008,38(5):46-48.
[4]王敬民.大跨径悬索桥施工中的猫道架设[J].江苏交通工程,1995,3(6):51-60.WANG Jing-min.Catwalk Setting Out in Long Span Suspension Bridge[J].Jiangsu Traffic Engineering,1995,3(6):51-60.
[5]赵旭洲,官幼平.自锚式悬索桥猫道设计及架设施工技术[J].铁道建筑技术,2009(10):33-38.ZHAO Xu-zhou,GUAN You-ping.Design and Erection Construction Technology of the Catwalk in Cable Selfanchored Suspension Bridge[J].Railway Construction Technology,2009(10):33-38.
[6]第五龙,姚永峰.江阴新沟河大桥猫道架设[J].港工技术与管理,2011,37(6):22-24,48.DIWU Long,YAO Yong-feng.Jiangyin Xingouhe Bridge Catwalk Setting up[J].Harbor Civil Technical and Arrangement,2011,37(6):22-24,48.
[7]蒋德俊.鹅公岩大桥悬索桥施工猫道主索制作工艺[J].公路交通技术,2002,18(3):64-67.JIANG De-jun.Catwalk Main Cable Manufacture Technical for Egongyan Suspension Bridge[J].Road Communication Technical,2002,18(3):64-67.
[8]王中文,朱宏平,钟建锋,等.大跨度悬索桥猫道抗风设计与施工[J].桥梁建设,2009,39(2):65-68.WANG Zhong-wen,ZHU Hong-ping,ZHONG Jian-feng,et al.Wind Resist Design and Construction of Catwalk in Long Span Suspension Bridge[J].Bridge Construction,2009,39(2):65-68.
[9]韦世国,薛光雄,沈良成.润扬大桥悬索桥猫道系统设计与施工[J].桥梁建设,2004,34(3):29-35.WEI Shi-guo,XUE Guang-xiong,SHEN Liang-cheng.Catwalk System Design and Construction of Run Yang Bridge[J].Bridge Construction,2004,34(3):29-35.
[10]同济大学.高等数学[M].5版.北京:高等教育出版社,2004.Tongji University.Advanced Mathematics[M].5th ed.Beijing:High Education Press,2004.