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Mechanics of kinking and buckling of plastic board drains

  • Madhav, Madhira R. (Department of Civil Engineering, Indian Institute of Technology) ;
  • Park, Yeong Mog (Department of Civil Engineering, Yeungnam University) ;
  • Miura, Norihiko (Department of Civil Engineering, Saga University)
  • 발행 : 1995.09.25

초록

The deformational response of plastic board drains installed to accelerate consolidation of soft soils, is examined as a problem of downdrag. The drain is modelled as a beam-column in which the axial load increases nonlinearly with depth. The soil response is represented by the Winkler medium whose coefficient of subgrade modulus increases linearly with depth. The governing equations for the drain-soil system are derived and solved as an eigenvalue problem. The critical buckling loads and the shape of the drain are obtained as functions of the normalized subgrade modulus of the soil at the top, the parameters signifying the variation of axial load along the length of the drain and the increase of subgrade modulus with depth. The derived deformed shapes of the drain are consistent with the observed ones.

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참고문헌

  1. Ali, F.H. (1991), "The flow behavior of deformed prefabricated vertical drains", Geotextiles and Geomembrances, 10, 235-248. https://doi.org/10.1016/0266-1144(91)90057-4
  2. Crawford, C.B., Fannin, R.J., de Boer, L.T. and Kern, C.B. (1992), "Experiences with prefabricated vertical (wick) drain at Vernon", B.C., Can. Geotech. J., 29, 67-79. https://doi.org/10.1139/t92-008
  3. Davisson, M.T. (1963), "Estimating buckling loads for piles", Proc. 2nd Pan American Conf. SMFE, 1, 351-371.
  4. Garassino, A., Jamiolkowski, M., Lancellotta, R. and Tonghini, M. (1975), "Behavior of pre-loading embankments on different vertical drains", Proc. 5th ECSMFE, 1, 213-218.
  5. Hansbo, S. (1981), "Consolidation of fine-grained soils by prefabricated drains", Proc. 10 ICSMFE, 3, 677-682.
  6. Holtz, R.D. and Christopher, B.R. (1987), "Characteristics of prefabricated drains for accelerating consolidation", Proc. 9th ECSMFE, 2, 903-906.
  7. Jamiolkowski, M., Lancellota, R. and Wolski, W. (1983), General Report, Specialty Session 6, Proc. 8th ECSMFE, Helsinki, 3, 1201-1226.
  8. Jimbo, N. (1991), "Paper drains and plastic board drains", Special Lecture, Saga Univ., P.T.-5(in Japanese).
  9. Kamon, M., Pradhan, T.B.S. and Suwa, S. (1991), "Evaluation of design factor of prefabricated band shaped drains", ICGECD, GEO-COAST '91, Yokohama, 329-334.
  10. Kerr, A.D. (1988), "On the buckling of slender piles", Soils and Foundations, 28(2), 144-148. https://doi.org/10.3208/sandf1972.28.2_144
  11. Koda, E., Szyaansky, A. and Wolski, W. (1989), "Behavior of geodrains in organic subsoil", Proc. 12th ICSMFE, 2, 1377-1380.
  12. Kremer, R.H.J., Oostveen, J.P., Van Weele, W.F. and Meyvogel, I.J. (1983), "The quality of vertical drainage", Proc. 8th ECSMFE, 2, 721-726.
  13. Lawrence, C.A. and Koerner, R.M. (1988), "Flow behavior of kinked strip drains", Proc. Symp. Geosynthetics for Soil Improvement, GE Div., ASCE, 22-39.
  14. Madhav, M.R. and Davis, E.H. (1975), "Buckling of finite beams in elastic continuum", J. Engrg. Mech. Div. ASCE, 100(EMD), 1227-1236.
  15. Miura, N., Park, Y.M. and Fukuhara, S. (1991), "Experiment on the drainage properties of plastic drains", Proc. 26th JS SMFE Annual meeting, Nogano, 2009-10 (in Japanese).
  16. Miura, N.,Park, Y.M. and Madhav, M.R. (1993), "Fundamental study on drainage performance of plastic board drains", Proc. JSCE, 481(III-25), 31-40.
  17. Nakamura, I., Okawa, H. and Kotani, K. (1985), Construction of Paper Drains of Super Length, Kisokou, 57-64 (in Japanese).
  18. Oostveen, J.P. and Troost, G.H. (1990), "Discharge index tests on vertical drains", Proc. 4th Int. Conf. Geotextiles, Geomembranes and Related Products, The Hague,1, 345-350.
  19. Pradhan, T.B.S., Kamon, M.and Suwa, S. (1991), "Design method for the evaluation of discharge capacity of prefabricated band shaped drains", Proc. 9th Asian Reg. Conf. SMFE, Bangkok, 1, 523-526.
  20. Reddy, A.S. and Valsangkar, A.J. (1970), "Buckling of fully and partially embedded piles", J. Soil Mech. and Founds., ASCE, 96(SM6), 1951-1965.
  21. Rixner, J.J., Kramer, S.R. and Smith, A.D. (1986), Prefabricated Vertical Drains, I, Summary of Research Effort, FHWA/RD-86/169.
  22. Shinsha, H., Hayashi, K. and Watari, Y. (1987), "Effect of band-shaped plastic drains on the progress of consolidation", Proc. 22nd JSSMFE Annual Meeting, 1791-1792 (in Japanese).
  23. Tanaka, H. (1990), "Settlement of ground improved by band drains at the development of the Tokyo International Airport", Proc. 10th SEAGC, Taipei, 133-138.
  24. Toakley, A.R. (1965), "Buckling loads for elastically supported structs", J. Engrg. Mech. ASCE, 91(EM3), 205-231.
  25. Van Zanten, V. (1986), "The guarantee of the quality of vertical drainage systems", Proc. 3rd Int. Conf. Geotextiles,Vienna, 2, 651-655.