Geomechanics and Engineering

  • 제8권5호
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  • Pages.707-726
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  • 2015
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
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Numerical modelling of Haarajoki test embankment on soft clays with and without PVDs

  • 투고 : 2014.08.14
  • 심사 : 2015.02.01
  • 발행 : 2015.05.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper investigates the time dependent behaviour of Haarajoki test embankment on soft structured clay deposit. Half of the embankment is constructed on an area improved with prefabricated vertical drains, while the other half is constructed on the natural deposit without any ground improvement. To analyse the PVD-improved subsoil, axisymmetric vertical drains were converted into equivalent plane strain conditions using three different approaches. The construction and consolidation of the embankment are analysed with the finite element method using a recently developed anisotropic model for time-dependent behaviour of soft clays. The constitutive model, namely ACM-S accounts for combined effects of plastic anisotropy, interparticle bonding and degradation of bonds and creep. For comparison, the problem is also analysed with isotropic Soft Soil Creep and Modified Cam Clay models. The results of the numerical analyses are compared with the field measurements. The results show that neglecting effects of anisotropy, destructuration and creep may lead to inaccurate predictions of soft clay response. Additionally, the numerical results show that the matching methods accurately predict the consolidation behaviour of the embankment on PVD improved soft clays and provide a useful tool for engineering practice.

키워드

참고문헌

  1. Brinkgreve, R.B.J. (2002), PLAXIS, Finite Element Code for Soil and Rock Analyses, 2D-Version 8, Balkema, Rotterdam, Netherlands.
  2. Burland, J.B. (1990), "On the compressibility and shear strength of natural clays", Geotechnique, 40(3), 329-378. https://doi.org/10.1680/geot.1990.40.3.329
  3. Chai, J.C. and Miura, N. (2001), "Investigation of factors affecting vertical drain behaviour", J. Geotech. Geoenviron. Eng., 125(3), 216-226. https://doi.org/10.1061/(ASCE)1090-0241(1999)125:3(216)
  4. Chu, J., Bob, M.W. and Choa, V. (2004), "Practical considerations for using vertical drains in soil improvement projects", Geotext. Geomembr., 22(1-2), 101-117. https://doi.org/10.1016/S0266-1144(03)00054-2
  5. FinnRa (FinnishNational Road Administration) (1997), Competition to Calculate Settlements at Haarajoki Test Embankment, Competition Materials, Finland.
  6. Grimstad, G. and Degago, S. (2010), "A non-associated creep model for structured anisotropic clay (n-SAC)", Proceedings of the 7th European Confrerence on Numerical Methods in Geotechnical Engineering, (Numer. Method. Geotech. Eng.), Trondheim, Norway, June, pp. 3-8.
  7. Hansbo, S. (1979), "Consolidation of clay by bandshaped prefabricated drains", Ground Eng., 12(5), 16-25.
  8. Hird, C.C., Pyrah, I.C. and Russell, D. (1992), "Finite element modelling of vertical drains beneath embankments on soft ground", Geotechnique, 42(3), 499-511. https://doi.org/10.1680/geot.1992.42.3.499
  9. Indraratna, B. and Redana, I.W. (1997), "Plane strain modeling of smear effects associated with vertical drains", J. Geotech. Eng., 123(5), 474-478. https://doi.org/10.1061/(ASCE)1090-0241(1997)123:5(474)
  10. Indraratna, B. and Redana, I.W. (2000), "Numerical modelling of vertical drains with smear and well resistance installed in soft clay", Can. Geotech. J., 37(1), 132-145. https://doi.org/10.1139/t99-115
  11. Kamrat-Pietraszewska, D. (2011), "Numerical modelling of soft soil improved with stone columns", Ph.D. Thesis; University of Strathclyde, UK.
  12. Karstunen, M. and Koskinen, M. (2004), "Anisotropy and destructuration of murro clay", Adv. Geotech. Eng.; The Skempton Conference, London, UK, March, pp. 476-487.
  13. Karstunen, M. and Yin, Z.Y. (2010), "Modelling time-dependent behaviour of Murro test embankment", Geotechnique, 60(10), 735-749. https://doi.org/10.1680/geot.8.P.027
  14. Karstunen, M., Krenn, H., Wheeler, S.J., Koskinen, M. and Zentar, R. (2005), "The effect of anisotropy and destructuration on the behaviour of Murro test embankment", Int. J. Geomech., 5(2), 87-97. https://doi.org/10.1061/(ASCE)1532-3641(2005)5:2(87)
  15. Kavvadas, M. and Amorosi, A. (2000), "A constitutive model for structured soils", Geotechnique, 50(3), 263-274. https://doi.org/10.1680/geot.2000.50.3.263
  16. Kim, Y.T. and Lee, S.R. (1997), "An equivalent model and back-analysis technique for modelling in situ consolidation behavior of drainage-installed soft deposits", Compos. Geotech., 20(2), 125-142. https://doi.org/10.1016/S0266-352X(96)00016-X
  17. Kim, Y.T. and Leroueil, S. (2001), "Modeling viscoplastic behaviour of clays during consolidation: Application to berthierville clay in both laboratory and field conditions", Can. Geotech. J., 38, 484-497. https://doi.org/10.1139/t00-108
  18. Koskinen, M., Karstunen, M. and Wheeler, S.J. (2002), "Modelling destructuration and anisotropy of a natural soft clay", Proceedings of the 5th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE), Paris, France, September, pp. 11-20.
  19. Leoni, M., Karstunen, M. and Vermeer, P. (2008), "Anisotropic creep model for soft soils", Geotechnique, 58(3), 215-226. https://doi.org/10.1680/geot.2008.58.3.215
  20. Leroueil, S. and Vaughan, P.R. (1990), "The general and congruent effects of structure in natural soils and weak rocks", Geotechnique, 40(3), 467-488. https://doi.org/10.1680/geot.1990.40.3.467
  21. Leroueil, S., Kabbaj, M., Tavenas, F. and Bouchard, R. (1985), "Stress-strain-strain rate relation for the compressibility of sensitive natural clays", Geotechnique, 35(2), 159-180. https://doi.org/10.1680/geot.1985.35.2.159
  22. Mesri, G. and Godlewski, P.M. (1977), "Time and stress compressibility interrelationship", ASCE J. Geotech. Eng., 103(5), 417-430.
  23. Mesri, G. and Castro, A. (1987), "$C_{\alpha}/C_c$ concept and K0 during secondary compression", J. Geotech. Eng., 113(3), 230-247. https://doi.org/10.1061/(ASCE)0733-9410(1987)113:3(230)
  24. Mitchell, K.J. and Soga, K. (2005), Fundemental of Soil Behaviour, John Wiley & Sons, NJ, USA.
  25. Naatanen, A.,Vepsalainen, P. and Lojander, M. (1998), "Finite element calculations on Haarajoki test embankment", Proceedings of the 4th European Conference on Numerical Methods in Geotechnial Engineering (NUMGE), Udine, Italy, October, pp. 151-160.
  26. Neher, H.P., Wehnert, M. and Bonnier, P.G. (2001), "An evaluation of soft soil models based on trial embankments", In: Computer Methods and Advances in Geomechanics, Tucson, NM, USA, pp. 373-378.
  27. Roscoe, K.H. and Burland, J.B. (1968), On the Generalized Stress Strain Behaviour of 'Wet' Clay, Cambridge University Press, Cambridge, U.K., pp. 553-609.
  28. Taylor, D.W. (1948), Fundamentals of Soil Mechanics, John Wiley & Sons Inc.
  29. Vermeer, P.A. and Neher, H.P. (1999), "A soft soil model that ccounts for creep", Proceedings of the Plaxis Symposium on Beyond 2000 in Computational Geotechnics, Amsterdam, Netherlands, March, pp. 249-262.
  30. Wheeler, S.J., Naatanen, A., Karstunen, M. and Lojander, M. (2003), "An anisotropic elasto-plastic model for soft clays", Can. Geotech. J., 40(2), 403-418. https://doi.org/10.1139/t02-119
  31. Yildiz, A. (2009a), "Numerical modeling of vertical drains with advanced constitutive models", Comput. Geotech., 36(6), 1072-1083. https://doi.org/10.1016/j.compgeo.2009.04.001
  32. Yildiz, A. (2009b), "Numerical analyses of embankments on PVD improved soft clays", Adv. Eng. Software, 40(10), 1047-1055. https://doi.org/10.1016/j.advengsoft.2009.03.011
  33. Yildiz, A., Karstunen, M. and Krenn, H. (2009), "Effect of anisotropy and destructuration on the behaviour of Haarajoki test embankment", ASCE Int. J. Geomech., 9(4), 153-169. https://doi.org/10.1061/(ASCE)1532-3641(2009)9:4(153)
  34. Yin, J.H. and Zhu, J.G. (1999), "Elastic visco-plastic consolidation modelling and interpretation of pore weater pressure responses in clay underneath Tarsiut Island", Can. Geotech. J., 36(4), 708-717. https://doi.org/10.1139/t99-041
  35. Yin, Z.Y., Chang, C.S., Karstunen, M. and Hicher, P.Y. (2010), "An anisotropic elastic-viscoplastic model for soft clays", Int. J. Solid. Struct., 47(5), 665-677. https://doi.org/10.1016/j.ijsolstr.2009.11.004
  36. Yin, Z.Y., Karstunen, M., Chang, C.S., Koskinen, M. and Lojander, M. (2011), "Modeling time-dependent behavior of soft sensitive clay", J. Geotech. Geoenviron. Eng., 137(11), 1103-1113. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000527
  37. Zeng, G.X. and Xie, K.H. (1989), "New development of vertical drain theories", Proceedings of the 12th International Conference on Soil Mechanics and Foundation Engineering, Volume 2, Rio de Janeiro, Brazil, August, pp. 1435-1438.
  38. Zhou, C. and Yin, J.H. (2004), "Consolidation analyses of soils underneath Haarajoki test embankment using elastic-plastic and elastic visco-plastic models", J. Southeast Asian Geotech. Society, 35(1), 29-38.

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