不中断交通条件下大跨度跨铁路连续梁支座更换设计与施工——以广州某大跨度跨铁路连续梁桥支座更换为例  

Design and Construction of Continuous Beam Supports Replacement for Long Span Railway under Continuous Traffic Conditions:Taking the Replacement of the Support of a Long-span Railway Continuous Beam Bridge in Guangzhou as an Example

作　　者：周界龙 李智鹏 肖啸 王文哲 ZHOU Jielong;LI Zhipeng;XIAO Xiao;WANG Wenzhe(Guangzhou Beihuan Intelligent Transportation Technology Co.,LTD.,Guangzhou 510030,China;China Railway Bridge and Tunnel Technology Co.,LTD.,Nanjing 210031,China)

机构地区：[1]广州北环智能交通科技有限公司,广州510030 [2]中铁桥隧技术有限公司,南京210031

出　　处：《科技和产业》2024年第19期296-303,共8页Science Technology and Industry

基　　金：中国中铁股份有限公司科技研究开发计划(2022-专项-04)。

摘　　要：既有桥梁在运营一定时间后经常出现各种支座病害,严重影响桥梁的正常使用。以广州某大跨度跨铁路连续梁桥支座更换为背景,研究满足铁路临近营业线施工的分幅分步顶升方案。根据设计顶升方案运用有限元软件Midas Civil进行计算分析,考虑不中断交通工况,计算得出各个支座的支座反力及顶升3 mm高度状态下桥梁结构的受力状态,为顶升施工提供理论依据。同时合理布置千斤顶数量,为大吨位的顶升施工积累经验,为同类型桥梁的支座更换提供借鉴。The existing prestressed concrete continuous box girder bridge often has various bearing diseases after a certain period of operation,which seriously affects the normal use of the bridge.Taking the replacement of the support of a large-span railway continuous beam bridge in Guangzhou as the background,a segmented and step-by-step lifting scheme is adopted to meet the construction requirements of the railway near the business line.According to the design of the lifting plan,finite element software Midas Civil was used for calculation and analysis.Considering uninterrupted traffic conditions,the support reaction forces of each support and the stress state of the bridge structure under the lifting height of 3 mm were calculated,providing a theoretical basis for lifting construction.At the same time,the number of jacks should be reasonably arranged to accumulate experience for large-tonnage lifting construction and provide reference for the replacement of bearings for similar bridges.

关 键 词：支座病害 连续梁 支座更换 千斤顶 

分 类 号：U25[交通运输工程—道路与铁道工程]