松原市天河大桥北汊主桥上部结构施工关键技术

发布时间：2018-04-20 21:44

本文选题：组合梁桥 + 空间索面主缆　；参考：《世界桥梁》2017年03期

【摘要】：松原市天河大桥北汊主桥为(40+100+266+100+40)m双塔空间索面自锚式悬索桥,桥塔采用钢筋混凝土人字形结构,主梁分为混凝土加劲梁以及钢-混组合梁(由格构式钢梁上铺混凝土桥面板组成)两部分,主缆呈空间三维线形,全桥共51对吊索。桥塔采用液压自爬模施工,通过设置主动支撑以及预偏量控制塔身倾斜度;格构式钢梁采用以直代曲制作,边跨钢梁采用吊机原位吊装,中跨钢梁采用拼装平台上整节段拼装牵引滑移施工;主缆锚固系统位于加劲梁锚墩横梁上,采用厂内预制现场整体吊装施工;主缆架设采用PPWS施工方法,猫道采用预制吊装施工;针对可转动索夹以及球铰底座的特点,改变传统的体系转换临时吊索的使用顺序,达到吊索一次张拉成型。
[Abstract]:The north branch main bridge of Tianhe Bridge in Songyuan City is a self-anchored suspension bridge with 40 100 266 100 40 m double tower space cable surface. The bridge tower adopts reinforced concrete herringbone structure. The main beam is divided into two parts: concrete stiffened beam and steel-concrete composite beam (composed of lattice steel beam and concrete deck slab). The main cable is three dimensional linear and the whole bridge has 51 pairs of slings. The bridge tower is constructed by hydraulic self-climbing formwork, the inclined degree of the tower is controlled by setting active support and pre-deflection, the lattice steel beam is made of straight instead of curved, and the side span steel beam is hoisted in situ by crane. The steel beam of middle span is constructed by the whole section of the assembly platform, the main cable anchoring system is located on the beam of the stiffened beam anchor pier, the whole hoisting construction is adopted in the prefabricated site, and the construction method of PPWS is used for the erection of the main cable. According to the characteristics of the rotatable cable clamp and the ball hinge base, the use order of the traditional system conversion temporary sling is changed, and the sling is formed by one stretch.
【作者单位】：中建六局桥梁有限公司;
【分类号】：U445.4

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