2016年12月下第45卷第24期
D0I:10.7672/sgjs2016240015
施工技术
CONSTRUCTIONTECHNOLOGY
江津中渡长江大桥无水（浅水）区钢梁二次
荡移架设施工技术李阳，杨字波，于海力，余剑（中建六局桥梁有限公司，重庆402260）
【摘要】重庆市江津中渡长江大桥主桥为主跨600m双索面悬索桥，主跨浅水区及边跨无水区钢梁节段架设区域受到地形水文条件的影响，钢箱渠无法采用常规运梁驳船水运就位进行架设施工。针对以上特点，提出钢箱梁二次荡移架设施工技术，采用高低栈桥及跨缆吊机进行荡移架设，解决了主跨无水（浅水）区及边跨无吊索钢箱梁架设的施工间题，完咸了中渡长江大桥钢箱梁架设施工。实践证明该技术先进，工艺成熟，具有广泛的推广意义。
【关键词】桥梁工程；悬索桥；钢箱梁；栈桥；滑移
【中图分类号】U448.25
【文献标识码】A
【文章编号】1002-8498（2016)24-0015-03
15
Constructionof SecondarySwingErectionof SteelBeamforJiangjinZhongdu
YangtzeRiverBridgeinShallowWaterAreaorWithoutWaterArea
Li Yang,Yang Yubo,Yu Haili,Yu Jian
( China Construction Sixth Engineering Dirision Bridge Co. , Lad. , Chongqing 402260, China)
Abstract: Chongqing Jiangjin Yangtze River Bridge is a double-sided suspension bridge with the main span of 600 meters. The erection area of steel girders at the main bridge spans shallow water area and the side without water is affected by topographic hydrological conditions, so steel box girder can not be constructed by conventional beam barge water transport in place. In view of the above features, the secondary swing erection of steel box girder construction technology is proposed and the high and low trestle and crossed-cable lifting machine are used in swing erection. Doing this can solve the construction problems of erection of steel box girder without sling in main waterless (shallow water) area and complete the crossing Yangtze River Bridge steel box girder construction. Practice has proved that the technology is
advanced and mature, and it has extensive popularization significance. Key words:bridges; suspension bridges; steel box beam; trestle; sliding
工程概况 1
重庆市江津中渡长江大桥为主跨600m双索面悬索桥，桥面宽33m，双向六车道，主桥加劲梁采用正交异性板流线形扁平钢箱梁，标准梁段长12m，梁高3m，宽33m。全桥共分主跨50个节段和南边跨5 个梁段。
中渡长江大桥南岸边跨位于陆地无水区，南、北岸钢栈桥端头位于浅水区，均不能满足钢箱梁运输驳船吃水深度4m的要求，根据现场条件，钢箱梁架设时，南岸边跨及主跨无水（浅水）区梁段吊装
*中建股份科技研发课题（CSCEC-2012-Z-22）
【作者简介］李阳，助理工程师，E-mail：786711250qq.com
[收稿日期】2016-10-15 万方数据
时，运梁驳船无法直接在桥位正下方抛锚定位，不能采用常规方法进行钢箱梁架设。因此，利用钢管桩支架搭设高、低栈桥，配合2台负荷10t的卷扬机与南、北岸跨缆吊机进行钢箱梁二次荡移架设施工。图1为钢箱梁标准横断面示意。图2为主桥桥型布置与栈桥位置关系。
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设计高程图1
钢箱梁标准横断面
Fig.1
The standard section of steel box
girder