高速铁路竖曲线平顺性优化及工程应用  

Optimization of Vertical Curve Smoothness in High-speed Railway and Its Engineering Application

作　　者：谭社会 时瑾[2] 张雨潇 TAN Shehui;SHI Jin;ZHANG Yuxiao(China Railway Shanghai Group Co.Ltd,Shanghai 200071,China;Beijing Jiaotong University,Beijing 100044,)

机构地区：[1]中国铁路上海局集团有限公司,上海200071 [2]北京交通大学,北京100044

出　　处：《铁道工程学报》2024年第1期13-19,共7页Journal of Railway Engineering Society

基　　金：国家自然科学基金项目(52078035)。

摘　　要：研究目的:高速行车条件下线路空间线形与旅客乘坐舒适度之间的关系更加紧密,纵断面竖曲线半径的合理设置对提升线路平顺性具有重要意义。本文基于高速铁路动静态检测数据,分析引起竖曲线地段动态检测数据超限的主要影响因素不是轨道几何形位,而是与竖曲线参数设置有关,结合高速铁路竖曲线设计原则提出以合理增大竖曲线半径改善轨道平顺性的竖曲线优化方法,应用该竖曲线优化方法制定某高速铁路竖曲线超限地段精调作业方案并验证作业效果。研究结论:(1)通过动力仿真得到250 km/h、300 km/h、350 km/h速度对应的精调作业竖曲线半径建议值,分别为22 500 m、29 500 m和35 000 m;(2)作业方案实施效果表明,超限地段42 m短波高低不平顺降幅48.21%,120 m长波高低不平顺降幅30.62%;车载式线路检查仪垂加Ⅱ级超限报警由日均11.4次降至2.0次;(3)本研究成果可为高速铁路竖曲线的轨道精调及标准设置提供参考。Research purposes:Under the condition of high-speed operation,the relationship between alignment and passenger riding comfort is closer.The reasonable setting of vertical curve radius is of great significance to improve smoothness.Based on the dynamic and static detected data of high-speed railway,this paper analyzes that the main factor causing the dynamic detection data overrun in vertical curve section is not the track geometry,but the setting of vertical curve parameters.Combined with the design principle of vertical curve in high-speed railway,a vertical curve optimization method is proposed to reasonably increase the radius of vertical curve and improve track smoothness.The vertical curve optimization method is applied to formulate the accurate adjustment operation plan of the vertical curve overrun section in a high-speed railway,and the operation effect is verified.Research conclusions:(1)Through dynamic simulation,the recommended vertical curve radius of fine adjustment operation corresponding to the speeds of 250 km/h,300 km/h and 350 km/h are 22500 m,29500 m and 35000 m respectively.(2)The operation plan implementation results show that the short wave vertical irregularity of 42 m decreases by 48.21%,the long wave vertical irregularity of 120 m decreases by 30.62%;The levelⅡwarning of vertical acceleration of vehicle shaking instrument decreased from 11.4 times a day to 2.0 times.(3)The research results can provide reference for the track precise adjustment and standard setting of vertical curves in high-speed railway.

关 键 词：高速铁路 线形控制 竖曲线 轨道不平顺 无砟轨道 

分 类 号：U216.42[交通运输工程—道路与铁道工程]