International Journal of Railway

The Korean Society for Railway (한국철도학회)
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Evaluation of Dynamic Properties of Trackbed Foundation Soil Using Mid-size Resonant Column Test

  • Lim, Yujin (Dept. of Civil, Environmental and Railroad Engineering, Paichai University) ;
  • Nguyen, Tien Hue (POSCO E&C at Hanoi) ;
  • Lee, Seong Hyeok (Advanced Infrastructure Research Team, Korea Railway Research Institute) ;
  • Lee, Jin-Wook (Advanced Infrastructure Research Team, Korea Railway Research Institute)
  • Published : 2013.09.30
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Abstract

A mid-size RC test apparatus (MRCA) equipped with a program is developed that can test samples up to D=10 cm diameter and H=20 cm height which are larger than usual samples used in practice. Using the developed RC test apparatus, two types of crushed trackbed foundation materials were tested in order to get the shear modulus reduction curves of the materials with changing of shear strain levels. For comparison purpose, large repetitive triaxial compression tests (LRT) with samples of height H=60cm and diameter D=30 cm were performed also. Resilient modulus obtained from the LRT was converted to shear modulus by considering elastic theory and strain level conversion and were compared to shear modulus values from the MRCA. It is found from this study that the MRCA can be used to test the trackbed foundation materials properly. It is found also that strain levels of $E_{v2}$ mostly used in the field should be verified considering the shear modulus reduction curves and proper values of $E_{v2}$ of trackbed foundation must be used considering the strain level verified.

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References

  1. Milosavljevic, L., Popovic, Z., Lazarevic, L. (2012). "Track Stiffness and the Vertical Track Geometry Deterioration Modeling", Facta Universitatis, Series: Mechanical Engineering, Vol. 10, No. 2, pp. 157-162.
  2. Hardin, B. O., Drnevich, V. P. (1972). "Shear Modulus and Damping in Soil: Measurement and Parameter Effects", Journal of the Soil Mechanics and Foundation Division, ASCE, Vol. 98, No. 7, pp. 603-624.
  3. Nguyen, T. H. (2011). "Development of Mid-size Resonant Column Test Apparatus using FEA and Stress-strain Integration approach", Master's Thesis, Paichai University, Korea.
  4. Hwang, J. K. (2011). "Development of Permanent Deformation Prediction Model for Reinforced-roadbed Crushed Stone Based on Resilient Modulus and Shear Stress Ratio", Master's Thesis, Paichai University, Korea.
  5. Lim, Y., Hwang, J., Cho, H. (2012). "Development of Permanent Deformation Prediction Model for Trackbed Foundation Materials based on Shear Strength Parameters", Journal of the Korean Society for Railway, Vol. 15, No. 6, pp. 623-630. https://doi.org/10.7782/JKSR.2012.15.6.623
  6. Seed, H. B., Idriss, I. M. (1970). "Soil Moduli and Damping Factor for Dynamic Response Analyses", Report No EERC 70-10. Tech. Rep., Earthquake Engineering Research Centre, University of California, Berkeley.
  7. Seed, H. B., Wong, R. T., Idriss, I. M., Tokimatsu, K. (1986). "Moduli and Damping Factors for Dynamic Analyses of Cohesionless Soil", Journal of Geotechnical Engineering, ASCE, Vol. 112, No. 11, pp. 1016-1032. https://doi.org/10.1061/(ASCE)0733-9410(1986)112:11(1016)
  8. Li, D., Selig, E. T. (1998). "Method for Railroad Track Foundation Design. I: Development", J. Geotech. Geoenv. Eng., ASCE, Vol. 124, No. 4, pp. 316-322. https://doi.org/10.1061/(ASCE)1090-0241(1998)124:4(316)
  9. UIC (1994). "Earthworks and Track-bed Layers for Railway Lines", UIC Code 719R, International Union of Railways, Paris, France.
  10. Heath, D. L., Shenton, M. J., Sparrow, R. W., Waters, J. M. (1972). "Design of Conventional Rail Track Foundations", Proc. Inst. Civ. Eng., Vol. 51, pp. 251-267.