研究目的：混凝土桥与路基或钢桥相连时，在桥梁温度变化时，由于梁缝两侧横向伸缩位移的差异会对桥上无砟轨道结构受力及轨向不平顺产生影响。本文通过建立线、板、桥、墩一体化空间耦合模型，分析梁缝附近轨道结构受力及轨向不平顺的影响因素，并确定主要影响因素对应的取值范围，从而为后续桥梁支座、线间距等的设计提供理论指导。
研究结论：（1）轨道板温度变化会引起轨距改变，但不会造成轨距超限；（2）CA砂浆层与轨道摩擦阻力在纵向与横向上的分配系数以及桥墩的横向水平刚度对轨向不平顺及凸台受力等影响较小，但钢梁的温度变化幅度及横向固定支座距线路中心线的距离会显著影响凸台受力及轨向不平顺；（3）依据轨向不平顺限值确定了不同桥梁温升幅度及线间距条件下的横向固定支座与活动支座之间的距离限值，为桥梁支座设置提供理论指导；（4）该研究成果可应用于铁路无砟轨道设计中。
Abstract
Abstract：Research purposes：In the case of the concrete bridge connected to roadbed or steel bridge, with the temperature changes, due to differences in scale-displacement of the beam seams on both sides, the force and track alignment irregularity would be impacted of ballastless track on bridge. Through the establishment of the line, plates, bridges, piers integrated space coupling model, this article analyses the forces of track structure near the beam seams and the influential factors of track alignment irregularity, and confirms the value range corresponding to the main factors, so as to provide theoretical guidance for the subsequent bridge bearings, line spacing design.
Research conclusions：(1) The track plate temperature changes will cause track gauge change, but will not cause the gauge overrun. (2) CA mortar layer and rail friction resistance have a little influence on track alignment irregularity and boss force in vertical and horizontal distribution coefficients and lateral stiffness on the pier, however, temperature change width of the steel beams and distance from transversely fixed bearing to the centerline would have great impact. (3) According to the track alignment irregularity limits, distance limits between lateral movable supports and fixed bearings are determined under different conditions of temperature increase and line spacing the distance, providing theoretical guidance for bridge bearings settings. (4) The research results have been applied to ballastless track design of Chengdu-Mianyang-Leshan Railway.
关键词
无砟轨道 /
耦合模型 /
轨向不平顺 /
线间距
{{custom_keyword}} /
Key words
Key words: ballastless track /
spatial coupling model /
track alignment irregularity /
distance between centers of tracks
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
［1］中铁二院工程集团有限责任公司，西南交通大学. 大跨桥梁轨道变形控制与应用［D］. 成都：中铁二院工程集团有限责任公司，2014.
China Railway Eryuan Engineering Group Co.Ltd, Southwest Jiaotong University. Control and Application of Deformation of Track Structure on Long-span Bridges［D］. Chengdu：China Railway Eryuan Engineering Group Co.Ltd, 2014.
［2］崔丽红, 郭福安, 江忠贵, 等. 长大混凝土桥梁无砟轨道温度跨度的研究［J］. 铁道工程学报, 2012 (7):11-13.
Cui Lihong, Guo Fuan, Jiang Zhonggui, etc. Research on Temperature Span of Ballastless Track on Large-span Concrete Bridge［J］. Journal of Railway Engineering Society, 2012 (7):11-13.
［3］谢铠泽, 王平, 徐井芒, 等. 桥上单元板式无砟轨道无缝线路的适应性［J］. 西南交通大学学报, 2014 (4):649-655.
Xie Kaize, Wang Ping, Xu Jingmang, etc. Adaptability of Continuous Welded Rail of Unit Slab Non-〖JP〗ballst Track on Bridges［J］. Journal of Southwest Jiaotong University, 2014(4):649-655.
［4］Zhu Shengyang, Cai Chengbiao. Interface Damage and Its Effect on Vibrations of Slab Track under Temperature and Vehicle Dynamic Loads［J］. International Journal of Non-Linear Mechanics, 2014 (10):222-232
［5］全顺喜, 王平, 陈嵘. 钢桁梁梁端横向伸缩对轨道几何形位的影响［J］. 重庆交通大学学报(自然科学版), 2010(6):859-861.
Quan Shunxi, Wang Ping, Chen Rong. Impact of Beam-end Lateral Expansion of Steel Truss Girder on Geometrical Shape of Track［J］. Journal of Chongqing Jiaotong University( Natural Science) , 2010(6):859-861.
［6］Rakesh K, Akhil U. Effect of Temperature Gradient on Track-bridge Interaction［J］. Interaction and Multiscale Mechanics,2012 (1):1-12.
［7］P Wang, JJ Ren, R Xiang, etc. Influence of Rub-plate Length on Forces and Displacements of Longitudinally Coupled Slab Track for a Bridge Turnout［J］. Jouranl of Rail and Rapid Trasit, 2012(226):284-293.
［8］谢铠泽,王平,徐浩,等. 刚构桥上无砟轨道无缝线路病害分析［J］. 中南大学学报(自然科学版), 2014(6):2085-2091.
Xie Kaize, Wang Ping, Xu Hao, etc. Diseases of Continuous Welded Rail of Ballstless Track on Rigid Frame Bridge［J］. Journal of Central South University(Science and Technology), 2014(6):2085-2091.
［9］王平, 陈嵘, 杨荣山, 等. 桥上无缝道岔设计理论［M］. 成都:西南交通大学出版社, 2011.
Wang Ping, Chen Rong, Yang Rongshan, etc. Research on the Design Method for Welded Turnout on Bridge［M］. Chengdu: Southwest Jiaotiong University Press, 2011.
［10］全顺喜. 高速道岔几何不平顺动力分析及其控制方法研究［D］. 成都:西南交通大学, 2012.
Quan Shunxi. Study on Dynamic Analysis and Control Methods of the Geometric Irregularity in High-speed Turnout［D］. Chengdu: Southwest Jiaotong University, 2012
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
基金
基金项目：〖HTSS〗中国铁路总公司科技研究开发计划项目（2012G010-B)
{{custom_fund}}
PDF(876 KB)
