市域铁路地下停车场50 kg/m钢轨9号道岔设计与研发  

Design and Development of 50 kg/m Steel Rail No.9 Turnout in Suburban Railway Underground Parking Lot

作　　者：宫寅 李林 GONG Yin;LI Lin(China Railway Shanghai Design Institute Group Co.,Ltd.,Shanghai,200070,China;China Railway Construction Heavy Industry Corporation Limited,Zhuzhou 410100,China)

机构地区：[1]中铁上海设计院集团有限公司,上海200070 [2]中国铁建重工集团有限公司,湖南株洲410100

出　　处：《铁道勘察》2024年第3期188-193,共6页Railway Investigation and Surveying

基　　金：中铁上海设计院集团有限公司科技开发计划重点课题(集21-A01)。

摘　　要：市域铁路地下停车场无砟道床采用50 kg/m钢轨9号道岔,但目前没有成熟产品,需要研制可用于无砟道床的50 kg/m钢轨9号道岔。首先,通过调研总结国铁、城市轨道交通道岔技术研究成果,确定需研制道岔的设计原则;其次,开展道岔平面线形设计、关键参数检算、尖轨扳动力检算、转辙器结构设计、辙叉结构设计,并通过试制、试铺进行验证。研究表明,(1)采用相离半切线型弹性可弯尖轨技术、刨切基本轨加厚尖轨技术,尖轨设1个牵引点及1个可调连杆,可有效减小电务及工务的养护维修工作量。(2)转辙器跟端传力机构采用限位器结构、辙叉加长设计,可满足铺设无缝线路的条件;转辙器设置辊轮滑床板,滑床板采用弹性夹扣压结构,可降低尖轨扳动力并确保扣压稳定;间隔设置防跳限位装置,可确保尖轨稳定。(3)采用分开式可调扣件,具备良好的调轨距、调高功能;采用桁架式混凝土岔枕,岔枕与道床连接稳固;岔枕应预留施工定位孔,以便于施工。The ballastless track bed of the underground parking lot of the suburban railway adopts 50 kg/m steel rail No.9 turnout.There are no mature products currently,so it is necessary to develop 50 kg/m steel rail No.9 turnout that can be used for ballastless track bed.Firstly,through research and summary of the research results on turnout technology in China Railway and urban rail transit,the design principles for the development of turnout were reasonably determined.The design of turnout plane alignment,key parameter calculation,switch rail pulling force calculation,switch structure design,and frog structure design were carried out,and verified through trial production and trial laying.The results show that:(1)The switch rails are equipped with one traction point and one adjustable connecting rod,effectively reducing the maintenance and repair workload of electrical and engineering services.(2)The power transmission mechanism at the end of the switch adopts a limiter structure,and the frog is designed to be extended to meet the conditions for laying seamless tracks.The switch is equipped with a roller wheel sliding bed plate,which adopts an elastic clamping and pressing structure to reduce the pulling force of the switch rail and ensure stable clamping and pressing.The installation of the anti-jump limit devices at intervals ensures the stability of the switch rails.(3)Adopting separate adjustable fasteners help maintain track gauge and height adjustment functions.Using truss type concrete switch sleepers help the switch sleepers well connected to the track bed and the switch sleeper has reserved construction positioning holes for easy construction.The research results can provide reference for similar engineering and research.

关 键 词：市域铁路 道岔设计 地下停车场 50 kg/m钢轨 9号道岔 尖轨 

分 类 号：U213.2[交通运输工程—道路与铁道工程] U451[建筑科学—桥梁与隧道工程]