Geomechanics and Engineering

  • 제6권1호
  • /
  • Pages.17-31
  • /
  • 2014
  • /
  • 2005-307X(pISSN)
  • /
  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Characteristics of failure surfaces induced by embankments on soft ground

  • Hong, Eun-Soo (BON E&C Co., Ltd.) ;
  • Song, Ki-Il (Department of Civil Engineering, Inha University) ;
  • Yoon, Yeo-Won (Department of Civil Engineering, Inha University) ;
  • Hu, Jong-Wan (Department of Civil and Environmental Engineering, College of Urban Science, University of Incheon, Incheon Disaster Prevention Research Center, University of Incheon)
  • 투고 : 2012.09.21
  • 심사 : 2013.08.26
  • 발행 : 2014.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper investigates the development of failure surfaces induced by an embankment on soft marine clay deposits and the characteristics of such surfaces through numerical simulations and its comparative study with monitoring results. It is well known that the factor of safety of embankment slopes is closely related to the vertical loading, including the height of the embankment. That is, an increase in the embankment height reduces the factor of safety. However, few studies have examined the relationship between the lateral movement of soft soil beneath the embankment and the factor of safety. In addition, no study has investigated the distribution of the pore pressure coefficient B value along the failure surface. This paper conducts a continuum analysis using finite difference methods to characterize the development of failure surfaces during embankment construction on soft marine clay deposits. The results of the continuum analysis for failure surfaces, stress, displacement, and the factor of safety can be used for the management of embankment construction. In failure mechanism, it has been validated that a large shear displacement causes change of stress and pore pressure along the failure surface. In addition, the pore pressure coefficient B value decreases along the failure surface as the embankment height increases. This means that the rate of change in stress is higher than that in pore pressure.

키워드

참고문헌

  1. Baker, R. and Garber, M. (1978), "Theoretical analysis of the stability of slopes", Geotechnique, 28(4), 395-411. https://doi.org/10.1680/geot.1978.28.4.395
  2. Bishop, A.W. (1955), "The use of the slip circle in the stability analysis of slopes", Geotechnique, 5(1), 7-17. https://doi.org/10.1680/geot.1955.5.1.7
  3. Cheng, Y.M., Lansivaara, T. and Wei, W.B. (2007), "Two-dimensional slope stability analysis by limit equilibrium and strength reduction methods", Comput. Geotech., 34(3), 137-150. https://doi.org/10.1016/j.compgeo.2006.10.011
  4. Dawson, E.M., Roth, W.H. and Drescher, A. (1999), "Slope stability analysis by strength reduction", Geotechnique, 49(6), 835-840. https://doi.org/10.1680/geot.1999.49.6.835
  5. Fellenius, W. (1936), "Calculation of the Stability of Earth Dams", Proc. of the Second Congress of Large Dams 4, 445-463.
  6. Griffiths, D.V. and Lane, P.A. (1999), "Slope stability analysis by finite elements", Geotechnique, 49(3), 387-403. https://doi.org/10.1680/geot.1999.49.3.387
  7. Hammouri, N.A., Malkawi, A.I.H. and Yamin, M.M.A. (2008), "Stability Analysis of slope using the finite element method and limiting equilibrium approach", Bull. Eng. Geol. Env., 67(4), 471-478. https://doi.org/10.1007/s10064-008-0156-z
  8. Hudson, R.R., Toh, C.T. and Chan, S.F. (1989), International Symposium on Trial Embankments on Malaysian Marine Clays, Kuala Lumpur, November, Vol. 1-3.
  9. Hunter, G. and Fell, R. (2003), "Prediction of impending failure of embankments on soft ground", Can. Geotech. J., 40(1), 209-220. https://doi.org/10.1139/t02-081
  10. Indraratna, B., Balasubramaniam, A.S. and Balachandran, S. (1992), "Performance of test embankment constructed to failure on soft marine clay", ASCE. J. Geotech. Eng., 118(1), 12-33. https://doi.org/10.1061/(ASCE)0733-9410(1992)118:1(12)
  11. ITASCA (2002), FLAC-Fast Lagrangian Analysis of Continua, version 4.0., Minneapolis (MN), Itasca Consulting Group, Inc.
  12. Janbu, N. (1954), "Applications of composite slip surfaces for stability analysis", Proceedings of European Conference on the Stability of Earth Slopes, Stockholm, Sweden, Vol. 3, pp. 43-49.
  13. Kim, J.Y. and Lee, S.R. (1997), "Improved search strategy for critical slip surface in stress fields obtained by finite element method", Comput. Geotech., 21(4), 295-313. https://doi.org/10.1016/S0266-352X(97)00027-X
  14. Kourdey, A., Alheib, M. and Piguet, J.P. (2001), "Evaluation of slope stability by numerical methods", The 17th International Mining Congress and Exhibition of Turkey, IMCET 2001, Ankara, Turkey, pp. 705-710.
  15. Merrien-Soukatchoff, V. and Omraci, K. (2000), "Determination des conditions aux limites pour un calcul de stabilite de talus", Revue Francaise de Geotechnique, 92, 31-39.
  16. Matsui, T. and San, K.C. (1992), "Finite element slope stability analysis by shear strength reduction technique", Soils Found., 32(1), 59-70. https://doi.org/10.3208/sandf1972.32.59
  17. Morgenstern, N.R. and Price, V.E. (1965), "The analysis of the stability of general slip surfaces", Geotechnique, 15(1), 79-93. https://doi.org/10.1680/geot.1965.15.1.79
  18. Petterson, K.E. (1955), "The early history of circular sliding surfaces", Geotechnique, 5(4), 275-296. https://doi.org/10.1680/geot.1955.5.4.275
  19. Revilla, J. and Castillo, E. (1977), "The calculus of variations applied to stability of slopes", Geotechnique, 27(1), 1-11. https://doi.org/10.1680/geot.1977.27.1.1
  20. Rocscience Inc. (2010), Analysis and Design Programs for Civil Engineering and mining Applications, www.rocscience.com
  21. Skempton, A.W. (1954), "The pore pressure coefficients A and B", Geotechnique, 4(4), 143-147. https://doi.org/10.1680/geot.1954.4.4.143
  22. Smith, P.R., Jardine, R.J. and Hight, D.W. (1992), "The yielding of Bothkennar clay", Geotechnique, 42(2), 257-274. https://doi.org/10.1680/geot.1992.42.2.257
  23. Taga Engineering (1991), TCON, Calculation of Consolidation Settlements and Rates of Settlement, TAGA Engineering Software Ltd., www.Tagasoft.com
  24. Tavenas, F. and Leroueil, S. (1980), "The behaviour of embankments on clay foundations", Can. Geotech. J., 17(2), 236-260. https://doi.org/10.1139/t80-025
  25. Taylor, D.W. (1937), "Stability of earth slopes", J. Boston Soc. Civ. Eng., 24, 197-246.
  26. Travenas, F. and Bouges, M.F. (1979), "Lateral displacement in clay foundation under embankments", Can. Geotech. J., 16(3), 532-550. https://doi.org/10.1139/t79-059
  27. Wei, W.B., Cheng, Y.M. and Li, L. (2009), "Three-dimensional slope failure analysis by the strength reduction and limit equilibrium methods", Comput. Geotech., 36(1-2), 70-80. https://doi.org/10.1016/j.compgeo.2008.03.003
  28. Zhang, K., Li, W. and Shi, J. (2011), "FEM stability analysis on soil slope with different constitutive models", Slope Stability and Earth Retaining Walls (GSP 216), Proceedings of the 2011 GeoHunan International Conference, ASCE.
  29. Zienkiewicz, O.C., Humpheson, C. and Lewis, R.W. (1975), "Associated and non-associated visco-plasticity and plasticity in soil mechanics", Geotechnique, 25(4), 671-689. https://doi.org/10.1680/geot.1975.25.4.671