Dynamic Characteristics Analysis of Hardening Railway Ballast Bed Based on Discrete Element Method

被引：0
|
作者：
Cui X. [1 ]
Xiao H. [1 ,2 ]
机构：
[1] School of Civil Engineering, Beijing Jiaotong University, Beijing
[2] Beijing Key Lab of Track Engineering, Beijing Jiaotong University, Beijing
来源：
Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2021年 / 56卷 / 06期
关键词：
Ballast bed; Discrete element method; Dynamic response; Hardening;
D O I：
10.3969/j.issn.0258-2724.20200113
中图分类号：
学科分类号：
摘要：
In order to study the influence of hardening railway ballast bed on its own dynamic characteristics, considering the real shape of ballast particles, a simulation analysis model of hardening ballast bed was established by using discrete element method. The influences of dirty hardening and hardening degree on the dynamic response of ballast bed was analyzed, and the meso-mechanism of elastic loss and stiffness increase of ballast bed caused by hardening was discussed. The results show that the hardening will increase the vibration level of ballast particles, and the more serious the hardening is, the more obvious the influence will be, and the hardening can increase the vibration acceleration of ballast particles by 20%−30%. The compaction will strengthen the impact of the train load on the ballast bed, increase the contact force between the ballast particles, which easily causes the ballast particles to break. The working performance of the track bed at different positions was amplified and the unevenness of the ballast bed stiffness was increased by the hardening. Dirty hardening materials between ballast particles can inhibit the relative movement of ballast particles, reduce the sliding fraction of ballast particles to about 50% of the normal value, and reduce the overall macroscopic deformation of the ballast bed under train load, thus showing the characteristics of increased stiffness. © 2021, Editorial Department of Journal of Southwest Jiaotong University. All right reserved.
引用
收藏
页码：1197 / 1204
页数：7
相关论文
共 19 条
  • [1] WANG Qingbo, Construction technology of artificial replacement of bridge ballast for datong-qinhuangdao railway, Railway Construction Technology, 2, pp. 66-69, (2015)
  • [2] GUO Shanxin, Formation and analysis of ballast hardening, Journal of Railway Engineering Society, 2, pp. 156-164, (1985)
  • [3] ZHAO Chengjiang, WANG Xiaorong, XIA Qiong, Et al., Frost heaving behaviors of hardened ballast beds under different content of clay and water, Journal of Railway Engineering Society, 28, 9, pp. 36-39, (2011)
  • [4] FORTUNATO E, PINELO A, FERNANDES M M., Characterization of the fouled ballast layer in the substructure of a 19th century railway track under renewal, Soils and Foundations, 50, 1, pp. 55-62, (2010)
  • [5] TANG A M, CUI Y J, DUPLA J C, Et al., Mechanical characterisation of the fouled ballast in ancient railway track substructure by large-scale triaxial tests, Soils and Foundations, 52, 3, pp. 511-523, (2012)
  • [6] PAIVA C, FERREIRA M, FERREIRA A., Ballast drainage in Brazilian railway infrastructures, Construction and Building Materials, 92, pp. 58-63, (2015)
  • [7] ISHIKAWA T, FUKU S, NAKAMURA T, Et al., Influence of water content on shear behavior of unsaturated fouled ballast, Procedia Engineering, 143, pp. 268-275, (2016)
  • [8] JIN Shouyan, TAN Fuxing, WANG Wusheng, Researching for the influence of cement hardening on the rail track vibration, Journal of Tongji University (Natural Science), 29, 10, pp. 1162-1168, (2001)
  • [9] (2015)
  • [10] XIAO Junhua, ZHANG De, WANG Yanhai, Et al., Study on interface stress between ballast and subgrade for traditional railway based on coupled DEM-FDM, Engineering Mechanics, 35, 9, pp. 170-179, (2018)
12