桥上无缝道岔交叉渡线无砟轨道影响因素分析  

Analysis of Influence Factors for the Seamless Turnout Scissors Crossing Ballastless Track on Bridge

作　　者：张世杰[1] 

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《铁道工程学报》2013年第10期48-54,共7页Journal of Railway Engineering Society

摘　　要：研究目的:基于有限单元法的桥上无缝道岔计算理论,针对桥上交叉渡线无缝道岔轨枕埋入式无砟轨道,建立桥上无缝道岔交叉渡线无砟轨道计算模型,研究轨温变化幅度、扣件阻力、凸形挡台刚度、桥梁布置等因素对钢轨、传力部件、凸形挡台、桥梁的受力与变形影响,并对今后桥上无缝道岔交叉渡线无砟轨道设计、施工以及养护维修提出建议。研究结论:(1)桥上无缝道岔交叉渡线无砟轨道结构复杂,应结合岔桥位置关系等具体情况进行检算;(2)与道岔匹配的Ⅱ型和Ⅲ型弹条扣件系统选择合理;(3)凸形挡台与底座板间胶垫刚度可取为250 kN/mm;(4)优先选择将其布置在对称结构的连续梁上,如布置在非对称的连续梁上,应结合具体情况选择合理梁型及支座布置形式,有利于控制整体结构的受力和变形;(5)本文研究可以为国铁、市域铁路和城市轨道交通的建设提供了理论依据并具有一定的参考意义。Research purposes： Based on finite element method for calculation theory of seamless turnout on bridge, for scissors crossing the seamless turnout sleeper ballastless track on bridge, Establish the seamless turnout scissors crossing ballastless track on bridge calculation model, Studied influence factors for the rail temperature variation, fastening resistance, shear cam rigidity, bridge bayout factors such as for influence on the stress and displacement of rail, power transmission components, shear cam, bridge, and make recommendations on what design, construction and maintenance of the seamless turnout scissors crossing ballastless track on bridge in the future. Research conclusions： （1）The seamless turnout scissors crossing ballastless track on bridge structure is complex, and should be combined with turnout details of bridge location relationship to calculate. （2） With the turnout to match Ⅱ and m type elastic fastener system selection is reasonable. （3）Rubber gasket stiffness desirable to 250 kN/mm between shear cam and base plate. （4）Preference will be decorated on the symmetric structure of continuous beam, As arranged on asymmetric continuous beam, Should be combined with the specific circumstances choose reasonable type beam and bearing arrangement, Conducive to control the overall structure of the stress and deformation. （5）This paper studies for national railway, regional railway and urban rail transit construction provide a theoretical basis and has certain reference significance.

关 键 词：交叉渡线 无缝道岔 无砟轨道 凸形挡台 有限元 

分 类 号：U213.2[交通运输工程—道路与铁道工程]