摘要
研究目的:京石客专左联与京广客专双线交叉角度为13°59',交叉角度小,经与连续梁方案比选后确定采用框架墩方案跨越,纵向采用5-20 m无砟单线预应力混凝土简支箱梁。通过采用桥梁有限元设计软件BSAS、Midas建立模型,分析研究框架高墩的强度、变形等各项参数是否能满足客运专线对无砟轨道的变形要求。研究结论:(1)与连续梁方案相比,框架墩具有跨越能力强、布置灵活、经济性能好等特点,被广泛采用,有效地解决了京石客专左联特大桥小角度跨越京广客专的问题。(2)框架高墩体系构造简单,受力明确,经检算,其各项指标均能满足无砟轨道对变形的要求。(3)动力分析表明,在列车速度240 km/h时,框架高墩能满足行车安全性和平稳性要求。(4)京石客专左联特大桥采用无砟轨道框架墩墩高达到38.5 m,该设计的应用对今后无砟轨道的框架墩的使用可提供一定参考借鉴。
Research purposes： The crossing angle between the left interconnecting railway of the Beijing - Shijiazhuang Passenger Dedicated Line and the Beijing- Guangzhou Passenger Dedicated Line is 13°59＇. As this angle is small, the frame pier plan was finally adopted after comparing the optional schemes of the frame pier. The 5 -20 m unballasted signle line prestressed concrete simple supported box beam was adopted longitudinally. The structure model was built with bridge finite element design software BSAS and Midas to analyze and research whether the various parameters, such as strength and deformation of the high frame pier, could meet the demands of the ballastless track of passenger dedicated line for the deformation or not. Research conclusions ： （ 1 ） Compared with the continuous beam plan, the frame pier has the characteristics of strong ability of spanning, agile arrangement and good economical efficiency capability, so it is widely used. It solved the problem of the left interconnecting railway of the Beijing - Shijiazhuang Passenger Dedicated Line crossing the Beijing - Guangzhou Passenger Dedicated Line with small angle. （2） The structure of high frame pier system is simple with clear load bearing. After checking, all the indexes meet the demands of the ballastless track for deformation. （ 3 ） The dynamic analysis shows that when the speed of the train is at 240 kin/h, the high frame pier can meet the traffic safety and stability requirements. （4） The hight of this high frame pier reaches the 38.5m and it can provide the reference to the similar works.
出处
《铁道工程学报》
EI
北大核心
2012年第12期69-71,89,共4页
Journal of Railway Engineering Society
关键词
无砟轨道
框架高墩
设计
ballastless track
high frame pier
design
