铁路钢桁梁桥顶推施工技术优化改进研究  

Study on Optimization and Improvement of Incremental Launching technology of Railway Steel Truss Bridge

作　　者：吴银栋 WU Yindong

机构地区：[1]中铁二十四局集团上海铁建工程有限公司,上海市200070

出　　处：《城市道桥与防洪》2023年第3期150-153,M0015,共5页Urban Roads Bridges & Flood Control

摘　　要：京沪铁路昆山至陆家浜段既有铁路改建工程中,跨青阳港航道80 m下承式钢桁梁采用顶推法施工。介绍了桥梁施工的关键内容、顶推施工的主系统构成,并对顶推装置系统进行了改进研究。通过将钢桁梁拼装支架与桥梁下部结构相结合形成顶推施工平台,根据长行程千斤顶的工作原理,将一体化自锚式顶推装置与滑道相结合,形成自锚式的动力系统。顶推装置将千斤顶与反力架合成整体,实现千斤顶与反力架的同步前进。改进后的顶推系统安装方便,顶推效率高,大幅减少了作业人员数量。In the existing railway reconstruction project of Kunshan-Lujiabang section of Beijing-Shanghai Railway,the through steel truss beam with the span of 80 m across the channel of Qingyang Port is constructed by incremental launching method.The key contents of bridge construction and the main system composition of incremental launching are introduced,and the improvement of incremental launching device system is studied.The steel truss assembly support is combined with the bridge substructure to form the incremental launching construction platform.According to the working principle of the long-distance jack,the integrated self-anchored incremental launching device is combined with the slideway to form the self-anchored dynamical system.The incremental launching device integrates the jack and the reaction frame into a whole to realize the synchronous advance of jack and reaction frame.The incremental launching system is easily installed after improved,and the incremental launching efficiency is high,which greatly reduce the number of operators.

关 键 词：铁路 钢桁梁 顶推 改进 自锚式 一体化 

分 类 号：U445.462[建筑科学—桥梁与隧道工程]