Roadbed behavior subjected to tilting-train loading at rail joint and continuous welded rail

Abstract

The tilting-train is very attractive to the railroad users in the world due to the advantage of high speed in curved track using pre-existing infrastructure of railway. Tilting-train has a unique allowable speed and mechanism especially in curved track. In this work, when tilting-train is operated with the allowable speed, the behavior of roadbed is evaluated by examining its settlement and bearing capacity. Additionally, the stability of roadbed is estimated as the roadbed is in the condition of soft soil influenced by the weather effects and cyclic train loading. Numerical results show that the roadbed settlement satisfies the allowable settlement when the elastic moduli of upper roadbed and in-situ soil are greater than 3800 and 4600 kN/m² for rail joint and 2300 and 3300 kN/m² for continuous welded rail (CWR).

Keywords

railway / roadbed / tilting-train / bearing capacity / settlement

References

[1] EsveldCModern railway track [M], 2001, Zaltbommel, Netherland, MRT-Productions: 1-16

[2] HarrisN R, SchmidF, SmithR A. Introduction: Theory of tilting train behavior [J]. Proceedings of the institution of Mechanical Engineers. Part F: Journal of Rail and Rapid Transit, 1998, 212(1): 1-5

[3] DegrandeG, ClouteauD, OthmanR, ArnstM, ChebliH, KleinR, ChatterjeeP, JanssensB. A numerical model for ground-borne vibrations from underground railway traffic based on a periodic finite element-boundary element formulation [J]. Journal of Sound and Vibration, 2006, 293(3/4/5): 645-666

[4] JuS H, LiaoJ R, YeY L. Behavior of ground vibrations induced by trains moving on embankments with rail roughness [J]. Soil Dynamics and Earthquake Engineering, 2010, 30(11): 1237-1249

[5] KouroussisG, VerlindenO, ContiC. On the interest of integrating vehicle dynamics for the ground propagation of vibrations: The case of urban railway traffic [J]. Vehicle System Dynamics, 2010, 48(12): 1553-1571

[6] PaolucciR, MaffeisA, ScandellaL, StupazziniM, VaniniM. Numerical prediction of low-frequency ground vibrations induced by high-speed trains at Ledsgaard, Sweden [J]. Soil Dynamics and Earthquake Engineering, 2003, 23(6): 425-433

[7] SaussineG, CholetC, GautierP E, DuboisF, BohatierC, MoreauJ J. Modelling ballast behavior under dynamic loading. Part 1: A 2D polygonal discrete element method approach [J]. Computer Methods in Applied Mechanics and Engineering, 2006, 195(19/20/21/22): 2841-2859

[8] WangJ, ZengX. Numerical simulations of vibration attenuation of high-speed train foundations with varied trackbed underlayment materials [J]. Journal of Vibration and Control, 2004, 10(8): 1123-1136

[9] Itasca consulting group Inc.FLAC2D User manual (Version 4.0) [M], 2002, Minneapoils, Itasca Consulting Group Inc: 1-4

[10] EumK Y, KooD H, YangS C, YeoI H, MunH S, UmJ H, SinS K, KimT W, KimE, LeeH SDevelopment of track system innovation technology for speed-up conventional line [R], 2005

[11] SeoSRailway engineering [M], 2002, Korea, Eul & Al Press: 327-394