Effects of elastic sleeper on macro and micro mechanical properties of ballast bed

被引：0

作者：

Xiao H. ^{[1
]}

Cui X. ^{[2
]}

Ling X. ^{[3
]}

Liu G. ^{[1
]}

Zhang Z. ^{[1
]}

Wang Y. ^{[1
]}

Chi Y. ^{[1
]}

机构：

[1] Beijing Key Lab of Track Engineering, Beijing Jiaotong University, Beijing

[2] Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing

[3] Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2023年 / 54卷 / 09期

关键词：

ballast bed; discrete element method; dynamic response; elastic sleeper; mechanical property;

D O I：

10.11817/j.issn.1672-7207.2023.09.036

中图分类号：

学科分类号：

摘要：

The influence of elastic sleepers on the mechanical properties of ballast beds under train loads was systematically studied. Firstly, a refined ballast bed model considering the angular characteristics of ballast particles was established by using the discrete element method. Secondly, the accuracy of this model was validated through on-site dynamic testing results. Finally, the influence of elastic sleeper pads on various aspects, such as ballast particle contact forces, frictional energy, ballast particle movement, and ballast bed deformation was analyzed from a macro-micro perspective. The results show that the deformation of the elastic sleeper pads plays a buffering role. As a result, the distribution of dynamic train loads is more uniform. The load-sharing ratio decreases by 5.67%. The force on the ballast particles directly beneath the wheel also decreases. The decreasing trend of ballast particles breaking and turning into powder appears. Overall vibration of the ballast bed decreases by the use of elastic sleeper pads. Sliding between ballast particles under train loads diminishes. The growth rate of frictional energy of ballast particles slows down. Wear and pulverization of ballast particles also decreases. Greater elastic deformation of the track under dynamic train loads is observed when elastic sleeper pads are used. However, the angular velocity and plastic displacement of ballast particles decrease. Consequently, track bed stability is maintained, and the speed of track bed settlement and deformation decreases. The lifespan of the railway track is extended and maintenance costs are lowered. © 2023 Central South University of Technology. All rights reserved.

引用

页码：3776 / 3785

页数：9

共 27 条

[1] JING Guoqing, FENG Kun, GAO Liang, Et al., DEM simulation of ballast degradation and breakage under cyclic loading, Journal of Southwest Jiaotong University, 47, 2, pp. 187-191, (2012)
[2] GAO Liang, XU Yang, YANG Guotao, Et al., Review of research of railway ballast bed deterioration, Journal of the China Railway Society, 44, 8, pp. 78-92, (2022)
[3] KOLLER G., FFU synthetic sleeper-Projects in Europe, Construction and Building Materials, 92, pp. 43-50, (2015)
[4] NGAMKHANONG C, KAEWUNRUEN S., Effects of under sleeper pads on dynamic responses of railway prestressed concrete sleepers subjected to high intensity impact loads, Engineering Structures, 214, (2020)
[5] NAVARATNARAJAH S K, INDRARATNA B, NIMBALKAR S., Application of shock mats in rail track foundation subjected to dynamic loads, Procedia Engineering, 143, pp. 1108-1119, (2016)
[6] OMODAKA A, KUMAKURA T, KONISHI T., Maintenance reduction by the development of resilient sleepers for ballasted track with optimal under-sleeper pads, Procedia CIRP, 59, pp. 53-56, (2017)
[7] WANG Qichang, QIAN Zhendi, ZHANG Lei, Et al., The application of elastic sleepers to high-speed ballasted track, Railway Standard Design, 48, 8, pp. 1-5, (2004)
[8] GONG Zengjin, KE Zaitian, CHEN Songlin, Et al., Comprehensive test study of the culverts on 200 km⋅h<sup>-1</sup> speed-increase line, China Railway Science, 29, 2, pp. 38-43, (2008)
[9] YOU Ruilin, FAN Jia, DU Xianggang, Study on test method for static stiffness of pad under elastic sleepers for ballasted track on heavy haul railway, Railway Engineering, 54, 11, pp. 136-139, (2014)
[10] MA Chunsheng, XIAO Hong, GAO Liang, Experimental study on mechanical characteristics of elastic sleeper ballast track on high-speed railways, China Civil Engineering Journal, 48, pp. 81-87, (2015)

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