Structural Monitoring and Maintenance

  • 제9권1호
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  • Pages.1-27
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  • 2022
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  • 2288-6605(pISSN)
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  • 2288-6613(eISSN)
테크노프레스 (Techno-Press)
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Stress waves transmission from railway track over geogrid reinforced ballast underlain by clay

  • Fattah, Mohammed Y. (Civil Engineering Department, University of Technology) ;
  • Mahmood, Mahmood R. (Civil Engineering Department, University of Technology) ;
  • Aswad, Mohammed F. (Civil Engineering Department, University of Technology)
  • 투고 : 2019.04.13
  • 심사 : 2022.03.19
  • 발행 : 2022.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

Extensive laboratory tests were conducted to investigate the effect of load amplitude, geogrid position, and number of geogrid layers, thickness of ballast layer and clay stiffness on behavior of reinforced ballast layer and induced strains in geogrid. A half full-scale railway was constructed for carrying out the tests, the model consists of two rails 800 mm in length with three wooden sleepers (900 mm × 10 mm × 10 mm). The ballast was overlying 500 mm thickness clay in two states, soft and stiff state. Laboratory tests were conducted to investigate the response of the ballast and the clay layers where the ballast was reinforced by a geogrid. Settlement in ballast and clay, soil pressure and pore water pressure induced in the clay were measured in reinforced and unreinforced ballast cases. It was concluded that the effect of frequency on the settlement ratio is almost constant after 500 cycles. This is due to that the total settlement after 500 cycles, almost reached its peak value, which means that the ballast particles become very close to each other, so the frequency is less effective for high contact particles forces. The average maximum vertical stress and pore water pressure increased with frequency.

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참고문헌

  1. Aikawa, A. (2015), "Research on vertical natural vibration characteristics of gravel aggregate in ballasted track", Quarterly Report of RTRI, 56(1), 26-32. https://doi.org/10.2219/rtriqr.56.26
  2. ASTM D 2435-96 (1996), Standard Test Method for One-Dimensional Consolidation Properties of Soils, Reprinted from the Annual Book of ASTM Standards, Vol. 4, No. 8, West Conshohocken, PA, USA.
  3. Awoleye, E.O.A. (1993), "Ballast type - Ballast Life Predictions", Derby, British Rail Research LR CES 122, October 1993.
  4. Chen, C. (2013), "Discrete element modelling of geogrid-reinforced railway ballast and track transition zones", Ph.D. Thesis; University of Nottingham, UK.
  5. Connolly, D., Giannopoulos, A. and Forde, M.C. (2013), "Numerical modelling of ground borne vibrations from high speed rail lines on embankments", Soil Dyn. Earthq. Eng., 46, 13-19. https://doi.org/10.1016/j.soildyn.2012.12.003
  6. Fattah, M.Y., Mahmood, M.R. and Aswad, M.F. (2017), "Experimental and numerical behavior of railway track over geogrid reinforced ballast underlain by soft clay", In: Recent Developments in Railway Track and Transportation Engineering, Sustainable Civil Infrastructures. https://doi.org/10.1007/978-3-319-61627-8_1
  7. Fattah, M.Y., Mahmood, M.R. and Aswad, M.F. (2019), "Stress distribution from railway track over geogrid reinforced ballast underlain by clay", Earthq. Eng. Eng. Vib., 18(1), 77-93. https://doi.org/10.1007/s11803-019-0491-z
  8. Fattah, M.Y., Mahmood, M.R. and Aswad, M.F. (2020a), "Effect of track speed on the behavior of railway track ballast system underlain by clay", Proceedings of IOP Conference Series: Materials Science and Engineering, 737, 012094. https://doi.org/10.1088/1757-899X/737/1/012114
  9. Fattah, M.Y., Mahmood, M.R. and Aswad, M.F. (2020b), "Settlement of railway track on reinforced ballast overlain by clayey", J. Transport. Logistics, 5(2). https://doi.org/10.26650/JTL.2020.0014
  10. Gao, H. (2013), "A 3D dynamic train-track interaction model to study track performance under trains running at critical speed", Master of Science Thesis; Department of Civil and Environmental Engineering, The Pennsylvania State University, PA, USA.
  11. Guo, Y., Zhai, W. and Sun, Y. (2018), "A mechanical model of vehicle-slab track coupled system with differential subgrade settlement", Struct. Eng. Mech., Int. J., 66(1), 15-25. https://doi.org/10.12989/sem.2018.66.1.015
  12. Hayano, K., Ishii, K. and Muramoto, K. (2013), "Effects of Ballast Thickness and Tie-tamper Repair on Settlement Characteristics of Railway Ballasted Tracks", Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris, France, September, pp. 1275-1282.
  13. Hussaini, S.K.K. (2013), "An Experimental Study on the Deformation Behavior of Geosynthetically Reinforced Ballast", Ph.D. Thesis; University of Wollongong, Australia.
  14. Krylov, V.V. (1995), "Generation of ground vibrations by superfast trains", Appl. Acoust., 44(2), 149-164. https://doi.org/10.1016/0003-682X(95)91370-I
  15. Lekarp, F., Isacsson, U. and Dawson, A. (2000), "State of the art. I: Resilient response of unbound aggregates", J. Transport. Eng., 126(1), 66-75. https://doi.org/10.1061/(ASCE)0733-947X(2000)126:1(66)
  16. Leshchinsky, B. and Ling, H.I. (2013), "Numerical modeling of behavior of railway ballasted structure with geocell confinement", Geotext. Geomembr. J., 36, 33-43. https://doi.org/10.1016/j.geotexmem.2012.10.006
  17. Li, D., Hyslip, J., Sussmann, T. and Chrismer, S. (2016), Railway Geotechnics, (E-book), Taylor and Francis Group, LLC.
  18. Majeed, Q.G., Fattah, M.Y. and Joni, H.H. (2018), "Effect of Load Frequency on the Subgrade Layer Stresses beneath Railways", Int. J. Civil Eng. Technol. (IJCIET), 9(11), 838-852.
  19. Nguyen, K., Goicolea, J.M. and Galbadon, F. (2011), "Dynamic Effect of High Speed Railway Traffic Loadsonthe Ballast Track Settlement", Group of Computational
  20. Profillidis, V.A. (2000), Railway Engineering, Ashgate Publishing Limited, Aldershot, UK.
  21. Seed, H.B., Chan, C.K. and Lee, C.E. (1962), "Resilience characteristics of subgrade soils and their relation to fatigue failures in asphalt pavements", Proceedings of International Conference on the Structural Design of Asphalt Pavements, Ann Arbor, MI, USA, pp. 611-636.
  22. Selig, E.T. and Waters, J.M. (1994), Track Geotechnology and Substructure Management, (1st Ed.), Thomas Telford Publications.
  23. Sowmiya, L.S., Shahu, J.T. and Gupta, K.K. (2011), "Railway tracks on clayey subgrade reinforced with geosynthetics", Proceedings of Indian Geotechnical Conference, Kochi, India, December, pp. 529-532.
  24. Wayne, M., Fraser, I., Reall, B. and Kwon, J. (2013), "Performance Verification of a Geogrid Mechanically Stabilized Layer", Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris, France, September, pp. 1381-1384.