地铁上盖物业场段库外线小半径曲线轨道无缝化研究
胡志鹏魏周春谢露刘杰
Research on Seamless Small-Radius Curved Track for Subway Upper Cover Property Depot External Lines
HU ZhipengWEI ZhouchunXIE LuLIU Jie
-
作者信息:陕西省铁道及地下交通工程重点实验室(中铁一院)， 710043， 西安
-
Affiliation:Shaanxi Key Laboratory of Railway and Underground Traffic Engineering(FSDI), 710043, Xi’an, China
-
关键词:
-
Key words:
-
DOI:10.16037/j.1007-869x.2025.05.020
-
中图分类号/CLCN:U213.9
-
栏目/Col:土建工程
摘要:
［目的］为减小上盖物业场段列车运行产生的振动和噪声对上盖建筑的影响，有必要研究地铁上盖物业场段库外线小半径曲线轨道无缝化设计方案。［方法］介绍了库外线无缝化的必要性；分析了库外线小半径曲线无缝线路的关键参数；基于无缝线路检算原理，对库外线半径为150 m的曲线段进行无缝线路检算及优化设计。［结果及结论］当库外线半径为150 m的曲线段每km铺设1 667根新Ⅲ型桥枕，且铺设可无缝化的7号弹性可弯尖轨道岔时，能够满足无缝线路铺设要求。库外线无缝线路优化设计方案为：库外线采用新Ⅲ型桥枕，线间距小于5 m的两线间采用道砟填平，曲线外侧道床肩宽加至400 mm，设置砟肩堆高，道床边坡坡率为1∶1.75。所提优化方案能够增强无缝线路的稳定性和安全储备量。
Abstracts:
［Objective］To reduce vibration and noise impacts from depot train operation on the upper cover property, it is necessary to study the seamless design scheme for small-radius curved tracks on subway upper cover property depot external lines.［Method］The necessity of seamless design for depot external lines is introduced; the key parameters of small radius curved CWR（continuously welded rail） on depot external lines are analyzed. Based on CWR inspection verification principles, CWR inspection verification and optimization designs are conducted for external line curved section with a radius of 150 m.［Result & Conclusion］When 1 667 pieces of new type Ⅲ bridge sleepers per km are laid in the 150 m radius curved section of depot external lines, and the No. 7 CWR elastic bendable rail turnout is also laid, CWR laying requirements could be met. The optimal CWR design scheme for depot external lines is: adopting new type Ⅲ bridge sleepers for depot external lines, filling the gap spacing less than 5m between two lines with ballast, widening shoulder width of the outer curve track bed to 400mm, setting elevated ballast shoulders, and setting ballast embankment slope ratio to 1∶1.75. The proposed optimization scheme can enhance CWR stability and safety margin.
- 上一篇: 从割裂到融合：上海轨道交通宝山路换乘站公共空间再梳理
- 下一篇: 盾构隧道管棚法下穿铁路路基变形控制
过刊浏览
资料下载
友情链接