东沙颖河大桥通行大件运输车辆加固技术

发布时间：2018-01-16 00:24

本文关键词：东沙颖河大桥通行大件运输车辆加固技术　出处：《世界桥梁》2014年01期 　论文类型：期刊论文

【摘要】：东沙颖河大桥为部分预应力混凝土组合箱梁桥,设计荷载为汽-超20,挂-120。某不可拆分的专用大件电力设备(车货总重644.5t)运输途经该桥,为确保车辆过桥时结构安全,采用装配式公路钢桥"桥上桥"方案临时加固该桥:在原桥墩墩顶对应桥面位置布置5根I22型工字钢梁作为斜交支座;考虑车辆通行时6.5m净宽要求,采用大横梁结构,并用骑马螺栓将钢主梁与大横梁连成整体。采用有限元软件建立加固前、后桥梁模型,计算关键截面位移、应力,得到加固后位移和应力满足该桥承载力要求,临时加固方案可行。临时加固后大件运输车辆通行监测结果表明:桥梁跨中实测位移远小于规范规定值;当车辆完全通过时,结构变形恢复良好,结构尚处于弹性工作状态。
[Abstract]:East Shayinghe River Bridge is a partially prestressed concrete composite box girder bridge design load for automobile over 20, a hanging -120. can not be split for large power equipment (the total weight of goods vehicles 644.5t) transportation through the bridge structure to ensure the safety of vehicles across the bridge, the assembled highway bridge steel bridge temporary the reinforcement of the bridge pier: in the original location of 5 I22 corresponding to the deck type steel I-beam as skew bearing; 6.5m is considering vehicle traffic, the beam structure, and the steel girder with large beam as a whole horse bolts. Using the finite element software established before the reinforcement, bridge model, calculation of key displacement, stress, displacement and stress are strengthening capacity to meet the requirements of the bridge, temporary reinforcement scheme is feasible. After large transport vehicles temporary reinforcement bridge monitoring results show that the measured displacement is far less than the standard value; When the vehicle is completely passed, the structural deformation is well restored, and the structure is still in a flexible working state.

【作者单位】：河南省交通规划勘察设计院有限责任公司;
【基金】：河南省交通运输科技重点项目(2012D19)
【分类号】：U448.213;U445.72
【正文快照】： 1工程概述位于周口市境内的东沙颖河大桥全长406.1m,桥梁夹角115°,桥宽24m,其中行车道宽21m,两侧各有宽1.5m的人行道,于2003年1月建成通车。上部结构为2联5×40m部分预应力混凝土组合箱梁桥,结构简支桥面连续。设计荷载为汽-超20,挂-120。桥下通航净宽30m,净高8m,满足V.3级航

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