大跨径拱桥钢箱主梁顶推滑移施工技术

发布时间：2018-01-19 14:43

本文关键词： 系杆拱桥钢箱梁胎架钢管桩轨道梁轨道顶推系统顶推施工　出处：《世界桥梁》2017年03期 　论文类型：期刊论文

【摘要】：盘锦辽东湾新区连岛中桥主桥为主拱跨径200m的系杆拱桥与连续梁的组合体系,主梁为钢箱梁。因运输距离远、路况复杂,在工厂将钢箱梁划分为19个节段,每节段分2个分段预制,现场将分段拼装成节段后,从中间向两侧依次顶推滑移施工。在距桥梁中线两侧5m、16m处共布置4条滑移胎架,胎架基础采用132根Φ630mm×10mm钢管桩基础,胎架立柱采用Φ630mm×10mm的钢管(与钢管桩焊接),在立柱顶沿纵向设置连续滑移轨道梁,轨道梁上安装43kg/m轨道,轨道处设置水平导向轮,增加了钢箱梁滑移时整体稳定性,故未设置横向分配梁。采用2台300t履带吊机吊装钢箱梁节段至滑移胎架上,在最外侧2条轨道上布置顶推系统(2台100t千斤顶),交替进行两侧钢箱梁节段顶推滑移施工,已就位的梁段焊接的同时,其它梁段继续顶推。
[Abstract]:The combined system of tie arch bridge and continuous beam with the main arch span of 200m is the main bridge of Liandao Middle Bridge in the new area of Panjin Liaodong Bay. The main girder is a steel box girder. The transportation distance is long and the road condition is complicated. The steel box girder is divided into 19 segments in the factory, each segment is divided into 2 sections prefabricated. After the segments are assembled into segments, the sliding construction is pushed from the middle to the two sides in turn, and 5 m from the middle line of the bridge. Four slippage tread frames were arranged at 16m. 132 桅 630mm 脳 10mm steel tube pile foundations were adopted for the tread foundation, and 桅 630mm 脳 10mm steel tubes (welded to the steel pipe piles) were used for the tread frame columns. At the top of the column, a continuous slip track beam is arranged along the longitudinal direction, 43 kg / m track is installed on the track beam, and a horizontal guide wheel is set at the track, which increases the overall stability of the steel box girder when it slips. Therefore, no transverse distribution beam is set up. Two 300t crawler cranes are used to hoist the steel box girder segment to the slip tyre frame, and the push system is arranged on the outermost 2 tracks with 2 sets of 100t jacks). At the same time, the other beam segments continue to push while the steel box girder segments in place are welded alternately.
【作者单位】：中建六局桥梁有限公司;
【分类号】：U445.4
【正文快照】： 1工程概况盘锦辽东湾新区连岛中桥位于辽宁省盘锦市辽河入海口西侧,为主拱跨径200m的系杆拱桥与连续梁的组合体系(见图1)。桥位东临营口市、北临盘锦市,为辽滨沿海经济技术开发新区重点工程[1]。图1主桥立面布置示意该桥钢主梁采用正交异性钢桥面板钢箱梁[2],全长200m。箱梁顶

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