摘要
通过建立无缝道岔纵向受力变形计算动力学模型,分析了线路拆除位置、植筋锚固及设置端梁等措施对接轨地段变形的影响,路基不均匀沉降对行车安全性的影响。结果表明:道岔曲基本轨后端的钢轨温度压力随线路拆除位置距岔心距离的缩短而增大。端部植筋锚固可显著减小拆除后自由端的纵向位移,可在其10 m范围内间隔两根轨枕植筋,以降低施工量、提高施工速度。端梁使轨下基础位移大幅减小,端梁数量对岔区轨道结构受力变形无明显影响,但对岔前纵连式轨道结构受力变形产生明显影响。
By establishing a dynamic model for the calculation of longitudinal force and deformation of seamless turnout,we analyzed the influence of line removal location,reinforcement anchoring and end beam setting on the deformation of the rail joining section,and the influence of uneven settlement of the roadbed on the safety of driving.The results show that:the temperature pressure of the rail at the back end of the turnout curved basic rail increases with the shortening of the distance from the center of the turnout to the line removal position.End reinforcement planting and anchoring can significantly reduce the longitudinal displacement of the free end after dismantling,and every interval of two sleepers can be planted within 10 m of it,which reduces the construction volume and improves the construction speed.End beams make the under-rail foundation displacement significantly reduced,the number of end beams has no significant effect on the force deformation of the track structure in the turnout area,but has a significant effect on the force deformation of the longitudinal connection track structure in front of the turnout.
作者
杨斌
李洪海
吴春磊
Yang Bin;Li Honghai;Wu Chunlei(Anhui-Jiangxi Railway Anhui Co.,Ltd.,Hefei Anhui 230012,China)
出处
《山西建筑》
2024年第16期105-110,共6页
Shanxi Architecture
基金
皖赣铁路安徽有限责任公司科技研究开发计划(池黄2028-00-2020号)。
关键词
无砟轨道
无缝道岔
接轨
植筋锚固
端梁
路基沉降
ballast-less track
seamless turnouts
connections
reinforcement anchors
end girders
subgrade settlement
