
78
施工
技
术
CONSTRUCTION TECHNOLOGY
2012年2月上第41卷
第358期
浙江省三门县金鳞大桥超长构件施工技术
王为凯,张润升
(科达集图股份有服公司,山东东售
257091)
[编要】金绩大桥的上部结构为(40+3x65+40)m的5跨Y形连续刚构桥。该桥Y形墩和0号块很长,其中1,4 号墩0号块长度为27.00m,2,3号墩0号块32.50m。这样就造成悬臂的长度较大。该桥处于沿海地区海龄泥土士质,无法搭设满支架进行施工,采用组合支架和临时拉杆成功解决了该技术难题。通过该桥的Y形墩和0号块
的施工实例,讲述Y形阴构桥超长Y形墩和0号块的施工工艺、技术控制要点。【关键词]桥梁工程;Y形构桥;支架;施工技术;控制
【中图分类号】U44.3.3
【文献标识码】A
【文章编号】1002-8498(2012)03-0078-07
ConstructionTechnology of Super-long StructureMembers of theJinlin
BridgeinSanmenCounty,ZhejiangProvince
Wang Weikai, Zhang Runsheng
(Keda Group Co., Lad., Dongying, Shandong257091, China)
Abstract: The top structure of Jinlin Bridge is five-span Y-shape continuous rigid bridge of (40 + 3 × 65 +40)m. The Y-shape piers and No. 0 pieces of the bridge belong to super-long members , among these the length of No. 0 piece of the No. 1 and No. 4 piers is 27m and the ones of No. 2 and No. 3 piers is 32. 5m, so the cantilever length is very big. Because the bridge locates in mud soil in coastal area, full scaffold is not erected to construct these members, Combination scaffold and temporary pull rod are used to successfully solve the technique difficulty. Based on practice project of these members, the authors
show the construction technologies and key control points of these members. Key words: bridges; Y-shape rigid bridges; supporting: construction; control
1工程概况
金鳞大桥位于三门县滨海新城南北向城市主干路滨经一路的北端,跨越金鳞湖,工程范围为K2 +120.25—K2+399.75.桥梁全长279.50m,横向分左右两幅,单幅桥梁宽23.00m,两幅桥之间设置 4.00m的中央分隔带。桥梁上部结构为(40+3×65 +40)m的5跨Y形连续刚构.桥梁平面中心线与道路中心线重合,为正交直线桥梁。主梁为预应力变截面连续箱梁,底宽15.00m,顶宽22.80m,跨中梁高1.40m,Y形斜腿与箱梁底板采用半径50.00m 圆弧线顺接,截面采用单箱双室直腹板断面。1,4 号墩0号块长27.00m,23号墩0号块长32.50m, 0号块Y形墩结合部的梁段设置中横梁,中横梁厚 2.00m,Y形墩标准断面厚度1.00m,宽度15.00m。
[收稿日期】2011-10-24
【作者简介】王为,科达集团股份有限公司研究员级高级工程师,国家注册一级建造师,注所监理工程师,中国管理科学研究院特约研究员,山东省东营市府葡大街65号257091,电话:(0546)8305828,
E-mail;wwk58e126.com 万方数据
Y形墩和0号块的构造如图1所示。
1600 1300
1650
-15 540
新梦
1400
15 =4.0
b23号增
图1Y形墩构造
Fig.1
主要施工难点
Y-shape pier's structure
从金鳞大桥的工程概况和Y形墩和0号块的