250 km/h高速铁路线路提速适应性研究及优化  

Research and Optimization of Speed Increase Adaptability for 250 km/h High-speed Railway Lines

作　　者：邓捷航 孙耿杰 冯乾旭 DENG Jiehang;SUN Gengjie;FENG Qianxu(Postgraduate Department,China Academy of Railway Sciences,Beijing 100081,China;Railway Science and Technology Research and Development Center,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Beijing High Speed Rail Engineering Section,China Railway Beijing Group Corporation Limited,Beijing 100071,China)

机构地区：[1]中国铁道科学研究院研究生部,北京100081 [2]中国铁道科学研究院集团有限公司铁道科学技术研究发展中心,北京100081 [3]中国铁路北京局集团有限公司北京高铁工务段,北京100071

出　　处：《铁道标准设计》2024年第11期25-29,共5页Railway Standard Design

基　　金：中国国家铁路集团有限公司科技研究开发项目(2022YJ144)。

摘　　要：时速250 km高速铁路是我国高速铁路网中的重要组成部分。既有时速250 km高铁提速,可有效提升我国高铁总体运输效率,优化完善高速铁路路网布局,实现全路效益最大化。根据我国时速250 km高速铁路的标准要求,通过仿真分析与理论计算等方法研究既有时速250 km高速铁路提速适应性。针对最小曲线半径、区间正线线间距、圆曲线/夹直线最小长度、缓和曲线长度、最小坡段长度、最小竖曲线半径等主要线路技术标准参数进行优化分析,结果表明:最小曲线半径维持现有标准,但需局部限速,并优化欠、过超高标准;现有区间正线线间距条件下,各项空气动力学指标都满足要求,维持现有标准;圆曲线、夹直线最小长度现有标准满足提速条件;缓和曲线长度受超高时变率控制,困难地段放宽至35 mm/s;最小坡段长度根据项目条件确定;最小竖曲线半径在竖向加速度分别为0.4,0.5 m/s^(2)条件下取值分别为20 000,15 000 m。High-speed railways with a speed of 250 km/h are an important part of China's high-speed railway network.Increasing the speed of the existing 250 km/h high-speed railway can effectively improve the overall transport efficiency of China's high-speed railway,optimize the layout of the high-speed railway network,and maximize the benefits.Based on the standard requirements for China's 250 km/h high-speed railway,this study investigated the speed increase adaptability of the existing 250 km/h high-speed railway using simulation analysis and theoretical calculations.Main technical standard parameters for the railway line,such as minimum curve radius,mainline track spacing in the section,minimum lengths of circular curve/straight sections,length of transition curves,minimum slope section length,and minimum vertical curve radius were analyzed for optimization.The results showed that the minimum railway curve radius could maintain the existing standard but required localized speed limit and optimization of the insufficient and excessive superelevation standards.Under the current mainline track spacing conditions,all aerodynamic indicators met the requirements,allowing the existing standard to remain.The existing standards for the minimum lengths of circular curves and straight sections met the conditions for speed increase.The lengths of transition curves were controlled by superelevation rate of change,with allowances for difficult sections adjusted to 35 mm/s.The minimum gradient length was determined based on project conditions.The minimum vertical curve radius was set at 20000 m and 15000 m for vertical acceleration of 0.4 m/s^(2) and 0.5 m/s^(2),respectively.

关 键 词：高速铁路 提速适应性 线路技术标准 标准参数 参数优化 

分 类 号：U238[交通运输工程—道路与铁道工程] U218U212