2011年2月第40卷
第3期
施工技术
CONSTRUCTION TECHNOLOGY
中山市长江路蝴蝶拱桥安装关键技术研究
周翰斌"，卢任贵2
（1.中交四航局第一工程有限公司，广东广州510500；2.中交四航工程技术研究院，广东广州
510230)
[摘要］中山市长江路蝴蝶拱桥是由倾斜的非对称钢拱助、曲线钢箱梁和倾斜的吊杆共同组成的多元空间结构体系属于特殊的梁拱组合体系桥受力行为复杂，针对该桥的安装难点，进行了总体安装方案的比选，选择了跨桥门式起重机的架设方案并对拱肋及钢箱梁的安装和合拢关键技术进行了研究实践表明跨桥门式起重机架设法应作为翊蝶拱桥安装的推荐方法。
【关键词】中山市长江路大桥：蝴蝶拱桥：跨桥门式起重机；安装施工
[中图分类号］U445
[文献标识码】A
[文章编号]1002-8498(2011) 03-0023-05
Researchof ErectionKeyTechniqueof Butterfly-shape ArchBridgeinZhongshanCityofGuangdongProvince
Zhou Hanbin'Lu Rengui?
( 1. The First Construction Lad. of CCCC Fourth Harbor Engineering Co. , Lad. , Guangzhou , Guangdong510500 , China;
2. CCCC Fourth Harbor Engineering Institute Co. , Lid. , Guangzhou , Guangdong510230 , China)
Abstract: A butterfly-shape arch bridge in Zhongshan city is a multi-element spatial structure composed of inclined unsymmetrical steel arch ribs ,curved steel box girder and inclined suspenders. It belongs to the especial girder-arch combined bridge ,and its mechanics behavior is complex. In the light of the erection characteristics of the bridge , the comparison and selection of erection scheme has been made , the scheme of erecting of the gantry crane assembled with universal members is adopted finally , and the research of key techniques for fulfilling erection and closing of the arch ribs and steel box girder has also been made. This practice shows that the erection method of the gantry crane assembled with universal members should be the recommended method for installing a butterfly-shape arch bridge.
Key words: Changjiang Road Bridge in Zhongshan city; butterfly-shape arch bridge; gantry
crane
assembled with universal members; erection construction
1
工程概况
中山市长江路大桥跨越石岐河，出于城市景观
建设的需要，该桥由2条倾斜的非对称钢拱肋、曲线钢箱梁和倾斜的吊杆共同构成一个多元的空间结构体系远跳该桥仿若腾空展翅的蝴蝶所以又名蝴蝶拱桥（见图1），其主跨110m，位于竖曲线半径 2000m、平曲线半径650m的空间曲线上。其外拱肋（远离平曲线圆心）向外倾斜13.5°，平面内矢高 37.0m；内拱助向外倾斜35.5°，平面内矢高30.0m。拱肋为国内蝴蝶拱桥中首次采用的椭圆形变截面，拱脚截面尺寸为长轴×短轴=4.1569m×3m拱顶截面尺寸为长轴×短轴=2.0784m×1.5m拱脚处
[收稿日期】2010-09-20
【作者简介］周输斌，中交四航局第一工程有限公司副总工程师，高级工程师，广东省广州市先烈东路316号309室
510500，电话：
( 020) 28291176 ,Email: zhanbin@ gzpee. com 万方数据
23
椭圆截面的长轴旋转90°逐步过渡变化到拱顶椭圆截面的短轴位置。拱脚段拱肋通过承台预理筋及钢板与拱座固结。桥型立面及侧面如图2所示。
图1中山市长江路蝴蝶拱桥
Butterfly-shape arch bridge
Fig.1
in Zhongshan city
该桥按城-A活载设计桥面的扁平钢箱梁由正交异性钢板组成在全部拱跨范围内连成一个整体，