摘要
新建南通至宁波高速铁路拟引入嘉兴南站,修建沪甬、苏杭方向联络线接轨沪昆场,按沪昆高速铁路预留条件插入道岔,新铺道岔与既有道岔间夹直线长度为15 m,小于《高速铁路设计规范》相关规定。为探究设计方案可行性,通过数值仿真对道岔间夹直线长度为15 m时车辆的通过性能以及无缝道岔的温度力进行研究。结果表明:(1)道岔间夹直线长15 m条件下,车辆的各项动力学指标均能满足规范要求;(2)在嘉兴地区特有的温度环境下,无缝线路的温度力受道岔间夹直线长度的影响较小,其静力学指标均能满足规范要求;(3)在综合考虑工程投资、对既有铁路运营影响以及工程合理性等因素,可优化咽喉区布置,将15 m作为道岔间夹直线长度的设计标准。研究成果可为其他项目和相关规范修编提供参考。
The new Nantong-Ningbo High-speed Railway aims to connect with Jiaxingnan Station,with branch lines connecting to Shanghai-Kunming High-speed Railway yard to facilitate links between Shanghai-Ningbo and Suzhou-Hangzhou directions,utilizing the reserved conditions of Shanghai-Kunming High-speed Railway to insert turnouts.However,the straight section length between the new and existing turnouts is 15 m,which falls short of the specifications outlined in the Code for Design of High-speed Railway.To explore the feasibility of this design,a simulation analysis was conducted from the perspectives of vehicle passing performance and temperature forces of continuously welded rail turnouts.The findings revealed that:(1)Under the condition of a 15 m intermediate straight section between turnouts,all dynamic performance indicators meet the code requirements.(2)In the temperature environment of the Jiaxing region,the temperature forces of continuously welded rail tracks are minimally affected by the intermediate straight section length between turnouts,with all static performance indicators satisfying code requirements.(3)Considering factors such as engineering investment,impact on existing line operations,and engineering rationality,the layout of the throat area can be optimized,adopting 15 m as the design standard for the intermediate straight section length between turnouts.The study outcomes can serve as a reference for other projects and contribute insights for revisions of related codes.
作者
何建林
HE Jianlin(Shanghai-Hangzhou Railway Passenger Dedicated Line Co.,Ltd.,Shanghai 200000,China)
出处
《高速铁路技术》
2024年第3期87-91,109,共6页
High Speed Railway Technology
关键词
接轨
道岔间夹直线
有限元分析
车辆通过性能
无缝道岔温度力
junction
intermediate straight section between turnouts
finite element analysis
vehicle passing performance
temperature forces of continuously welded rail turnouts
