摘要
研究目的:津秦客运专线军粮城北站位于塘沽西跨京津塘高速公路特大桥上且一般地段采用底座纵向连续的CRTSⅡ型板式无砟轨道结构,岔区采用连续的小刚架结构,这要求在连续小刚架桥上铺设底座纵连的无缝道岔。为了解决岔区底座纵连带来的一系列结构受力复杂问题,需对无砟道岔、道岔板和桥墩进行建模和受力分析,以用于指导结构设计。研究结论:本文通过对钢轨、道岔板和底座、梁体及墩台建立完善的线桥墩一体化模型进行分析,得出了纵连底座结构受力特性,纵连底座主要受到温度力和制动力作用。采用纵连底座刚度折减理论和极限状态设计方法是对前人桥上岔区底座结构研究的有力补充,为以后类似的工程提供了借鉴。
Research purposes： The Junliangcheng North Station of the Tianjin - Qinhuangdao Passenger Dedicated Line is located on the Tanguxi Bridge crossing the Beijing -Tianjin -Tangshan Highway. The CRTS II slab track with longitudinal connected concrete base is applied in ordinary in the turnout area for laying the seamless turnout on the section and the continuous short rigid frame bridge is applied longitudinal connected concrete base. In order to solve the problem of the complicated loading on structures caused by the longitudinal connected base, it is necessary to build the model for analyzing the loading on the ballastless turnout, the turnout slab and the piers to direct the structure design. Research conclusions：By the means of building the track - bridge - pier integrated model for the rail, turnout slab, concrete base, girder, pier and abutment, the load bearing characteristic of the longitudinal connected concrete base is obtained. It shows the longitudinal connected concrete base is mainly effected by the temperature force and braking force. Application of stiffness reduction theory and limit state design method for the longitudinal connected concrete base is an effective supplement of the previous study on the ence to the similar works in the future. concrete basein turnout area on bridge. It can provide the reference to the similar works in the future.
出处
《铁道工程学报》
EI
北大核心
2012年第10期47-51,123,共6页
Journal of Railway Engineering Society
关键词
小刚架
桥上道岔
纵连
short rigid frame bridge
turnout on bridge
longitudinal connected
