Mechanism of cross-level settlements and void accumulation of wide and conventional sleepers in railway ballast

Abstract

The cross-level and twist irregularities are the most dangerous irregularity types that could cause wheel unloading with the risk of derailments and additional maintenance expenses. However, the mechanism of the irregularities initiation and development is unclear. The motivation of the present study was the previous experimental studies on the application of wide sleepers in the ballasted track. The long-term track geometry measurements with wide sleepers show an enormous reduction of the vertical longitudinal irregularities compared to the conventional track. However, wide sleepers had higher twist and cross-section level irregularities. The present paper aims to explain the phenomenon by discrete element method (DEM) modeling the development process of sleeper inhomogeneous support at cross-level depending on the sleeper form. The DEM simulations show that the maximal settlement intensity is up to 3.5 times lower for a wide sleeper in comparison with the conventional one. Nevertheless, the cross-level differential settlements are almost the same for both sleepers. The particle loading distribution after all loading cycles is concentrated on the smaller area, up to the half sleeper length, with fully unloaded zones under sleeper ends. Ballast flow limitation under the central part of the sleeper could improve the resilience of wide sleepers to the development of cross-level irregularities. The mechanism of initiation of the cross-level irregularity is proposed, which assumes the loss of sleeper support under sleeper ends. The further growth of inhomogeneous settlements along the sleeper is assumed as a result of the interaction of two processes: ballast flow due to dynamic impact during void closing and on the other side high pressure due to the concentration of the pressure under the middle part of the sleeper. The DEM simulation results support the assumption of the mechanism and agree with the experimental studies.

Keywords

Wide sleeper / Ballasted track / Sleeper support inhomogeneity / Sleeper foot form / Discrete element modeling / Void accumulation

References

[1.] Unbehaun O. Breitschwellengleises—erste testergebnisse. Eisenbahningenieur, 2000, 51: 106-113 (in German)

[2.] Wakui H. Technological innovation in railway structure system with ladder sleeper. Concr J, 1998, 36(5): 8-16,

[3.] Deutsche Bahn AG. . Betonschwellen feste fahrbahn fertigteiltragplatten komponenten im netz der deutschen bahn AG, 2014 1 Berlin Betonschwellenindustrie e.V

[4.] RAILONE (2023) Breitschwelle: so breit, so gut! https://www.railone.de/produkte-loesungen/fern-gueterverkehr/schotteroberbau/sonderoberbau/breitschwelle. Accessed 24 Feb 2023

[5.] Lichtberger B. . Track compendium: formation, permanent way, maintenance, economics, 2005 Hamburg Eurailpress

[6.] Shannon Rail Services (2002) Twist faults. [Guidelines]. https://shannonrail.com/wp-content/uploads/pwi/twist_faults.pdf. Accessed 24 Feb 2023

[7.] Bergquist B, Söderholm P. Data analysis for condition-based railway infrastructure maintenance. Qual Reliab Engng Int, 2015, 31(5): 773-781,

[8.] Stibler M (2014) Der Oberbau der GKB am Prüfstand. Dissertation, TU Graz. https://diglib.tugraz.at/download.php?id=576a7303ee64d&location=browse

[9.] Feurig S (2020) Experimentelle und theoretische Untersuchungen zur Optimierung des Dynamischen Gleisstabilisators (DGS) im Hinblick auf eine Verbesserung der Gleislagestabilität. Dissertation, TU München. https://mediatum.ub.tum.de/doc/1544877/document.pdf

[10.] Lundqvist A, Dahlberg T. Load impact on railway track due to unsupported sleepers. Proc Inst Mech Eng Part F J Rail Rapid Transit, 2005, 219(2): 67-77,

[11.] Holtzendorff K (2003) Investigation of the settlement behavior of railway ballast and the void forming on railway tracks. Dissertation, Technische Universität Berlin

[12.] Zhu JY, Thompson DJ, Jones CJC. On the effect of unsupported sleepers on the dynamic behavior of a railway track. Veh Syst Dyn, 2011, 49(9): 1389-1408,

[13.] Bezin Y, Iwnicki SD, Cavalletti M, et al.. An investigation of sleeper voids using a flexible track model integrated with railway multi-body dynamics. Proc Inst Mech Eng Part F J Rail Rapid Transit, 2009, 223(6): 597-607,

[14.] Recuero AM, Escalona JL, Shabana AA. Finite-element analysis of unsupported sleepers using three-dimensional wheel–rail contact formulation. Proc Inst Mech Eng Part K J Multi-body Dyn, 2011, 225(2): 153-165

[15.] Zhu JJ, Ahmed AKW, Rakheja S, et al.. Development of a vehicle–track model assembly and numerical method for simulation of wheel–rail dynamic interaction due to unsupported sleepers. Veh Syst Dyn, 2010, 48(12): 1535-1552,

[16.] Li H, Zhao GT, Cai LP. Effects of unsupported sleepers on dynamic response of ballast track structures on bridge. J Beijing Jiaotong Univ, 2018, 42(4): 19-26 (in Chinese)

[17.] Sysyn M, Przybylowicz M, Nabochenko O, et al.. Identification of sleeper support conditions using mechanical model supported data-driven approach. Sensors, 2021, 21(11): 3609,

[18.] Sysyn M, Przybylowicz M, Nabochenko O, et al.. Mechanism of sleeper–ballast dynamic impact and residual settlements accumulation in zones with unsupported sleepers. Sustainability, 2021, 13(14): 7740,

[19.] Sysyn M, Nabochenko O, Kovalchuk V. Experimental investigation of the dynamic behavior of railway track with sleeper voids. Railw Eng Sci, 2020, 28(3): 290-304,

[20.] Kim D-S, Kim SD, Lee J (2006) Easy detection and dynamic behavior unsupported sleepers in high speed ballasted track. In: Proceedings of the seventh world congress on railway research, paper 414 Montreal, Canada, 4–8 June 2006

[21.] Varandas JN, Hölscher P, Silva MAG. Dynamic behavior of railway tracks on transitions zones. Comput Struct, 2011, 89(13–14): 1468-1479,

[22.] Zuada Coelho B, Hicks MA. Numerical analysis of railway transition zones in soft soil. Proc Inst Mech Eng Part F J Rail Rapid Transit, 2016, 230(6): 1601-1613,

[23.] Paixão A, Fortunato E, Calçada R. The effect of differential settlements on the dynamic response of the train-track system: a numerical study. Eng Struct, 2015, 88: 216-224,

[24.] Mosayebi SA, Esmaeili M, Zakeri JA. Numerical investigation of the effects of unsupported railway sleepers on train-induced environmental vibrations. J Low Freq Noise Vib Act Contr, 2017, 36(2): 160-176,

[25.] Xu C, Ito K, Hayano K, et al.. Combined effect of supported and unsupported sleepers on lateral ballast resistance in ballasted railway track. Transp Geotech, 2023, 38: 100913,

[26.] Liu J, Du S, Liu G, et al.. Influence of unsupported sleepers on the dynamic stability of ballasted bed based on wheelset impact tests. Railw Eng Sci, 2023, 31(1): 52-60,

[27.] Zhang D, Xu P, Tian Y, et al.. Ballasted track behavior induced by absent sleeper support and its detection based on a convolutional neural network using track data. Urban Rail Transit, 2023, 9(2): 92-109,

[28.] Balamonica K, Bergamini A, Van Damme B. Estimation of the dynamic stiffness of railway ballast over a wide frequency range using the discrete element method. J Sound Vib, 2023, 547: 117533,

[29.] Fang J, Zhao C, Lu X, et al.. Dynamic behavior of railway vehicle-ballasted track system with unsupported sleepers based on the hybrid DEM-MBD method. Constr Build Mater, 2023, 394: 132091,

[30.] Guo Y, Zhao C, Markine V, et al.. Discrete element modeling of railway ballast performance considering particle shape and rolling resistance. Railw Eng Sci, 2020, 28(4): 382-407,

[31.] Guo Y, Zhao C, Markine V, et al.. Calibration for discrete element modeling of railway ballast: a review. Transp Geotech, 2020, 23: 100341,

[32.] Xiao J, Zhang D, Wei K, et al.. Shakedown behaviors of railway ballast under cyclic loading. Constr Build Mater, 2017, 155: 1206-1214,

[33.] Mansouri P, Zakeri JA, Esmaeili M, et al.. Discrete element method analysis of lateral resistance of different sleepers under different support conditions. Constr Build Mater, 2022, 327: 126915,

[34.] Chalabii J, Movahedi Rad M, Hosseini S. Optimal shape design of concrete sleepers under lateral loading using DEM. Buildings, 2023, 13(7): 1574,

[35.] Guo Y, Fu H, Qian Y, et al.. Effect of sleeper bottom texture on lateral resistance with discrete element modeling. Constr Build Mater, 2020, 250: 118770,

[36.] Rampat TC, Le Pen L, Powrie W, et al (2019) Evaluating the performance of different sleeper shapes and materials. In: Railway engineering-2019: 15th International conference & exhibition. http://eprints.soton.ac.uk/id/eprint/434411

[37.] Bogacz R, Czyczuła W, Konowrocki R. Influence of sleepers shape and configuration on track-train dynamics. Shock Vib, 2014, 2014: 1-7,

[38.] Wang M, Han X, Jing G, et al.. Experimental and numerical analysis on mechanical behavior of steel turnout sleeper. Constr Build Mater, 2022, 329: 127133,

[39.] Suhr B, Six K. Efficient DEM simulations of railway ballast using simple particle shapes. Granul Matter, 2022, 24(4): 114,

Funding

Alexander von Humboldt-Stiftung(NNNN)