Track strengthening measures assessment of heavy haul railway based on freight train anti-derailment safety degree

被引：0
|
作者：
Gong K. [1 ]
Xiang J. [2 ]
Liu L. [1 ]
机构：
[1] Engineering Research Center of Railway Environmental Vibration and Noise Ministry of Education, East China Jiaotong University, Nanchang
[2] School of Civil Engineering, Central South University, Changsha
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2020年 / 51卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Anti-derailment safety degree of freight train; Heavy haul railway; Railway track engineering; Track strengthening measures;
D O I：
10.11817/j.issn.1672-7207.2020.03.029
中图分类号：
学科分类号：
摘要：
The assessment method of track strengthening measures of heavy haul railway based on freight train anti-derailment safety degree was proposed according to the analysis method of lateral vibration stability of freight train-track system(FTT system). The influences of the track structure strengthening on the anti-derailment safety degree of freight train and the train operation stability were analyzed, including improving the grade of the steel rail, using the III type sleeper, strengthening the fasteners and ballast. The results show that, compared with improving the grade of the steel rail, the impact of using III type sleeper on the anti-derailment capacity, the critical speed and the permissible limit speed of train is greater. Moreover, strengthening the fasteners and ballast can increase sharply the anti-derailment capacity, the critical speed and the permissible limit speed of train. When the fastener and ballast bed lateral stiffness are respectively greater than 120 MN/m and 15 MN/m, the saftey degree increase is smaller. The above track strengthening measures can improve a certain degree of ride stability, but ballast bed enhancement has less influence on the train operation stability. The track strengthening measures are effective to increase the freight train anti-derailment safety degree. Furthermore, this method can reflect the freight train derailment information and provide reference for the evaluation and formulation of track strengthening measures. © 2020, Central South University Press. All right reserved.
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页码：832 / 841
页数：9
相关论文
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