城际铁路长联大跨连续梁桥设计关键技术研究  

Research on Key Technology of Design for Long-span Continuous Beam Bridge of Intercity Railway

作　　者：鄢玉胜[1] 张鹏举[1] 曹增华[1] YAN Yusheng;ZHANG Pengju;CAO Zenghua(China Railway First Survey and Design Institute Group Ltd.,Xi'an 710043,China)

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《铁道标准设计》2021年第4期89-94,共6页Railway Standard Design

基　　金：陕西城际铁路有限公司科技研究开发计划项目(SCJ-HT(J)-JS-2015-077)。

摘　　要：随着我国城际铁路建设步伐的加快,长联大跨连续梁桥的应用越来越多,为解决长联大跨连续梁设计中的几个关键技术问题,依托西安北至机场城际铁路渭河特大桥的设计,采用理论计算和数值模拟相结合的方法,建立主桥模型进行计算,研究该桥临时支座解除时机、地震效应特点、大梁缝轨道方案等诸多设计问题,解决了该桥的临时支座设计解除时机、抗震设计难度大和大梁缝轨道平顺性难保证等问题。研究表明,采用合理的临时支座解除时机、抗震设计方法和轨道方案等关键技术,能较好解决长联大跨连续梁桥在城际铁路中的应用难题。With the acceleration of the construction of intercity railway in our country,the application of long-span continuous beam bridge is getting more popular.The purpose of this paper is to solve several key technologies in the design of long-span continuous beam.Based on the design of Wei River bridge of Xi'an North-to-Airport Intercity Railway,the combination method of theoretical calculation and numerical simulation is adopted to establish the main bridge model.Many design problems,such as the timing of temporary supports removal,the characteristics of seismic effect,the scheme of beam joint track and so on,are studied.The timing of temporary supports removal,the difficulties in seismic design and the smoothness of beam joint track are solved.The research shows that the application of long-span continuous beam bridge with long ground connection in intercity railway can be well fulfilled by means of such key technologies as reasonable time to remove temporary support,rational seismic design method and track scheme.

关 键 词：城际铁路 长联大跨 连续梁 临时支座 抗震设计 大梁缝 轨道方案。 

分 类 号：U448.13[建筑科学—桥梁与隧道工程] U448.215[交通运输工程—道路与铁道工程]