摘要
研究目的:对高速铁路咽喉区由正线2股道变为站内6股道形成的多股道变化的道岔群进行研究,选择合理的桥梁结构以满足无缝道岔的布置要求。研究结论:通过对无砟轨道无缝线路车站咽喉区道岔连续梁结构形式研究,总结出道岔区桥梁结构形式选择的控制因素;为设计出能满足无砟轨道无缝道岔受力及变形要求的结构需重点解决如下问题:(1)确定无砟轨道无缝道岔对桥梁结构变形及梁缝位置的要求。(2)根据无砟轨道无缝道岔对桥梁结构梁缝处钢轨横向相对位移限值的要求,确定合理的梁跨横向布置。(3)根据确定的梁跨结构形式,建立无缝道岔-桥梁-墩台一体化力学模型,计算岔区轨道、梁体和下部结构的工作状态。(4)做梁部结构整体及局部分析。
Research purposes： The research is done on the turnout group used for turning the two main tracks in the station throat zone of high-speed railway into six tracks in station for the purpose of reasonable choice of the bridge structure to meet the demands of welded turnout arrangement.Research conclusions：Through the research on the structure type of turnout continious girder in the station throat zone on ballastless and jointless track,the control sectors of choice of the bridge structure style in the turnout zone were summarized.In order to design the structure that can meet the strength and deformation requirements of the turnout on ballastless and welded turnout,the attention should be paid to the followings：（1） The demands of the ballastless and welded turnout to the bridge deformation and girder gap position should be confirmed.（2） According to the demands of the ballastless and welded turnout to the relative transverse displacement of rail at the position of girder gap,the reasonable transverse arrangement of girders should be confirmed.（3） Based on the confirmed bridge structure style,an integrated ballastless and jointless turnout-bridge-pier mechanical model should be established to calculate the working conditions of the track,girder and substructure in turnout zone.（4） The analysis of entire or partial girder should be made.
出处
《铁道工程学报》
EI
北大核心
2010年第10期58-61,73,共5页
Journal of Railway Engineering Society
关键词
高速铁路
咽喉区
道岔群
high-speed railway
throat zone
turnout group
