Field studies on the effects of under sleeper pads in lateral resistance of railway

Document Type : Original Article

Authors

1 Assistant professor, Department of Civil Engineering, Payame Noor University, Tehran, Iran

2 MSc graduate in Railway Engineering, Iran University of Science and Technology, Tehran, Iran

3 Associate professor, School of Railway Engineering, Iran University of Science and Technology, Tehran, Iran

Abstract

Under sleeper pads are used in several areas, specially, in places where transfer of vibrations to the surrounding areas should be limited. Beside of all advantages of this elements in the field of reducing costs of repair and maintenance of railway, improvement of line geometry, decreasing the thickness of required ballast, reduction of vibrations and disturbing noises coming from passing trains and increasing trip convenience, use of these pads according to thickness and hardness of them could be effective in lateral resistance. Based on international evaluations in the field of under sleeper pads, results of influence of under sleeper pads in lateral resistance  of railway are various, because of different reasons including: contact quality and compression of ballast grains, ballast thickness, distance between sleepers and different test for estimating the lateral resistance, therefore application of these pads specially in mountainous ways that lateral resistance is important, influence of these pads must be cleared. So in this field of study, lateral resistance of railway is measured by Single Tie Push Test. In this study 150 polyurethane under sleeper pads with two different stiffness which were produced by Getzner Company (specialize in vibration insulation in the rail), used in real line. Results of this field examinations show utilization of these elements under the sleepers increase 9.6% for the lateral resistance when SLB 3007 G (which are stiffer) attached in comparison to sleepers without pad and 2.54%  decrease when SLB 1308 G attached in comparison to sleepers without pad. However decrease in hardness, results in increasing rate of lateral resistance reduction.

Keywords

References

[1] Prof.dr..sc.Stepan Lakusic &Moja Ahac & Ivo Haladin; ''Experimental investigation of Railway Track with Under Sleeper Pad''; .Portroz, 2010
[2] International Union of Railways, “UIC Project, Under Sleeper Pads” , 4th Edition, Vienna, (2009).
[3] Dorothée Stiebel, Matthias Krüger, Ullrich Kleinert, Rüdiger Garburg,“Application and benefits of Elastic Elements in Ballasted Track”, Deutsche Bundesbahn (2006).
[4] H. Loy, “Under Sleeper Pads in Turnouts”, RTR 02 - European Rail Technology Review, pp. 35-38 (2009).
[5] Getzner Company, Website: www.getzner.com.
[6] Zakeri,  J.A. Mir fattahi, B. Fakhari, M. Field and laboratory Investigation on the lateral resistance of sleepers by employing STPT test. CD proceding. First International Conferance on Road and Rail Infrastructure, Croatia, (2010).
[7] A. Johansson et al., “Under Sleeper Pads-Influence on dynamic train-track interaction” ,Wear 265, pp.1479–1487 (2008).
[8] Otto Plášek, Richard Svoboda, Miroslava Hruzíková, “Assembly of Under Sleeper Pads in Turnouts for the Homogenization of Vertical Rai; Deflections”, Brno University of Technology, center for Integrated Design of Advanced Structures, Project No. 1M0579 (2007).
[9] E Kabo ; ''A Numerical Study of the Lateral ballast resistance in Railway tracks'', (2006).
[10] Fakhari, M.: Laboratory investigation of Frictional sleepers effects on Lateral Resistance of Railway Track, BSc. Thesis, Iran University of Science & Technology, School of Railway Engineering, (2009).
[11] Esveld, C.: Modern Railway Track, Second edition, TU-Delft, (2001).
[12] Selig, T.E &. Waters, J.M.: Track Geotechnology And  Substructure Management, Thomas Relford Publications ,1994.
[13] U.S. Department Of Transportation Federal Railroad Administration, The Influence Of Track Maintenance On The Lateral Resistance Of Concrete Tie Track, (2003).
[14] " Theory of CWR track stability." Report ERRI, D 202/PR3, Utrecht, Netherlands, (1995).

Files

History

  • Receive Date: 08 June 2015
  • Accept Date: 09 January 2016

Share

How to cite

Statistics