摘要
近些年,随着经济的飞速发展,各省会城市新建地铁遍地开花,各火车站区域铁路多处需增设下穿通道,对既有铁路采取钢便梁架空法施工。如遇场地受限,与铁路斜交区域,架空还需分多次倒换,且架空倒换期间应充分考虑曲线段两侧接触网立柱迁改距离规范要求及土方开挖时的稳定性,从而避免影响行车安全,因此倒换架空采用的D型梁及其基础位置、接触网位置固定、倒换架空完成后的最终架空超高设置计算格外重要。基于此,文章依托汉口火车站北广场涉铁工程中的下穿京广铁路桥涵工程,运用计算机辅助设计平纵断面图结合中太元计算确定各结构物及架空梁尺寸及位置,最终形成稳固的架空体系,为类似工程提供借鉴。
In recent years,with the rapid development of economy,new subways have been built here and there in provincial capital cities,many underpasses need to be added to railways in each railway station area,and steel temporary beam overhead method needs to be adopted for the construction of the existing railways.If the site is limited,in the skew area with the railway,the overhead work still requires multiple stages of switching and the specification requirements of the relocation distance of the catenary column on both sides of the curve section and the stability of the earthwork excavation should be fully considered during the overhead and switching period,so as to avoid affecting the traffic safety.Therefore,the D-beam and its foundation position adopted in the switching and overhead work,the catenary positionfixing,and the calculation offinal overhead superelevation setting after the completion of the overhead and switching are particularly important.Based on this,this paper relies on the bridge and culvert engineering undercrossing Beijing-Guangzhou Railway in Hankou Railway Station North Square railway-related engineering,and uses the computer-aided design plane and vertical section drawing combined with Zhongtaiyuan calculation to determine the size and position of each structure and overhead beam.Finally,a solid overhead system is formed to provide reference for similar engineering.
作者
陈玉耿
CHEN Yugeng(China Railway 11th Bureau Group Fourth Engineering Co.,Ltd.,Wuhan 430000,Hubei,China)
出处
《工程技术研究》
2025年第2期71-73,共3页
Engineering and Technological Research
关键词
大半径曲线
既有线
斜交
架空
large radius curve
existing line
skew
overhead
