Advertisement

Geotechnical and Geological Engineering

, Volume 34, Issue 2, pp 657–669 | Cite as

Stability of an Embankment on Soft Consolidating Soil with Vertical Drains

  • Agrahara KrishnamoorthyEmail author
  • Smit Kamal
Original paper

Abstract

Stability of an embankment constructed on soft consolidating soil improved with pre-fabricated vertical drains is investigated. The factor of safety of the embankment is obtained at various time intervals from the end of construction till the end of consolidation in order to check the embankment stability. Finite element method is used to obtain the effective stresses at required points in soil at various time intervals. Critical slip surface is obtained using two methods. In the first method, the critical slip surface is assumed as an arc of a circle selected among various probable slip circles with minimum factor of safety whereas, in the second method, a random walking type Monte Carlo technique is used to predict the critical slip surface. The effects of providing vertical drains on stability of an embankment is investigated by comparing the factor of safety of slope with vertical drains to the factor of safety of slope without vertical drains. It is concluded from the study that the installation of vertical drains enhances the factor of safety of the embankment from the end of construction till the end of consolidation.

Keywords

Finite element analysis Factor of safety Vertical drains Time dependent analysis Embankment stability 

References

  1. Alkasawneh W, Malkawi AIH, Nusairit JH, Albataineh N (2008) A comparative study of various commercially available programs in slope stability analysis. Comput Geotech 35(3):428–435CrossRefGoogle Scholar
  2. Baker R (1980) Determination of the critical slip surface in slope stability computations. Int J Numer Anal Methods Geomech 4(4):333–359CrossRefGoogle Scholar
  3. Bardet JP, Kapuskar MM (1989) A simplex analysis of slope stability. Comput Geotech 8(1):329–348CrossRefGoogle Scholar
  4. Barron RA (1948) Consolidation of fine-grained soils by drain wells. Trans ASCE 113:718–742Google Scholar
  5. Biot MA (1956) General solutions of the equations of elasticity and consolidation for a porous material. J Appl Mech 78:91–96Google Scholar
  6. Bishop AW (1955) The use of the slip circle in the stability analysis of slopes. Geotechnique 5(1):7–17CrossRefGoogle Scholar
  7. Borges JL (2004) Three-dimensional analysis of embankments on soft soils incorporating vertical drains by finite element method. Comput Geotech 31(8):665–676CrossRefGoogle Scholar
  8. Chai JC, Miura N (1999) Investigation of factors affecting vertical drain behavior. J Geotech Geoenviron Eng ASCE 125(3):216–226CrossRefGoogle Scholar
  9. Chai JC, Shen SL, Miura N, Bergado DT (2001) Simple method of modeling PVD-improved subsoil. J Geotech Geoenviron Eng ASCE 127(11):965–972CrossRefGoogle Scholar
  10. Chen X, Wu Y, Yu Y, Liu J, Xu XF, Ren J (2014) A two-grid search scheme for large-scale 3-D finite element analyses of slope stability. Comput Geotech 62:203–215CrossRefGoogle Scholar
  11. Cheng YM, Li L, Chi SC (2007) Performance studies on six heuristic global optimization methods in the location of critical slip surface. Comput Geotech 34(6):462–484CrossRefGoogle Scholar
  12. Donald IB, Giam SK (1988) Application of the nodal displacement method to slope stability analysis. In: Proceedings of the 5th Australia—New Zealand conference on geomechanics, Sydney, pp 456–460Google Scholar
  13. Duncan JM, Dunlop P (1969) Slopes in stiff-fissured clay and shales. J Soil Mech Found ASCE 95(2):467–492Google Scholar
  14. Greco VR (1996) Efficient Monte Carlo technique for locating critical slip surface. J Geotech Eng ASCE 122(7):517–525CrossRefGoogle Scholar
  15. Hansbo S (1981) Consolidation of fine-grained soils by prefabricated drains. In: Proceedings of the tenth international conference on soil mechanics and foundation engineering, Stochholm, Swedan, pp 677–682Google Scholar
  16. Hird CC, Pyrah IC, Russell D (1992) Finite element modeling of vertical drains beneath embankments on soft ground. Geotechnique 42(3):499–511CrossRefGoogle Scholar
  17. Indraratna B, Balasubramaniam AS, Ratnayake P (1994) Performance of embankment stabilized with vertical drains on soft clay. J Geotech Eng ASCE 120(2):257–273CrossRefGoogle Scholar
  18. Janbu N (1957) Earth pressures and bearing capacity calculations by generalized procedure of slices. In: Proceedings of the 4th international conference on soil mechanics and foundation engineering, London, UK, pp 207–212Google Scholar
  19. Kim JY, Lee SR (1997) An improved search strategy for the critical slip surface using finite element stress fields. Comput Geotech 21(4):295–313CrossRefGoogle Scholar
  20. Kim J, Salgado R, Yu HS (1999) Limit analysis of soil slopes subjected to pore-water pressures. J Geotech Geoenviron Eng 125(1):49–58CrossRefGoogle Scholar
  21. Kim J, Salgado R, Lee J (2002) Stability analysis of complex soil slopes using limit analysis. J Geotech Geoenviron Eng 128(7):546–557CrossRefGoogle Scholar
  22. Krishnamoorthy A (2010) Factor of safety of a consolidating slope by finite element method. Indian Geotech J 40(2):116–123Google Scholar
  23. Krishnamoorthy A (2013) Factor of safety of slope on consolidating soil with vertical drains by finite element method. Int J Geotech Eng 7(3):225–231CrossRefGoogle Scholar
  24. Malkawi AIH, Hassen WF, Sarma SK (2001) Global search method for locating general slip surface using Monte Carlo techniques. J Geotech Geoenviron Eng ASCE 127(8):688–698CrossRefGoogle Scholar
  25. Matsui T, San KC (1992) Finite element slope stability analysis by shear strength reduction technique. Soils Found 32(1):59–70CrossRefGoogle Scholar
  26. Morgenstern NR, Price VE (1965) The analysis of the stability of general slip surfaces. Geotechnique 15(1):79–93CrossRefGoogle Scholar
  27. Sarma SK (1979) Stability analysis of embankments and slopes. J Geotech Eng ASCE 105(12):1511–1524Google Scholar
  28. Scott LH, Yamasaki K (1993) Slope failure analysis using local minimum factor of safety approach. J Geotech Eng ASCE 119(12):1974–1987CrossRefGoogle Scholar
  29. Sengupta A, Upadhyay A (2009) Locating the critical failure surface in a slope stability analysis by genetic algorithm. J Appl soft Comput 9(1):387–392CrossRefGoogle Scholar
  30. Shen SL, Chai JC, Hong ZS, Cai FX (2005) Analysis of field performance of embankments on soft clay deposit with and without PVD—improvement. Geotext Geomembr 23(6):463–485CrossRefGoogle Scholar
  31. Spencer E (1967) A method of analysis of the stability of embankments assuming parallel interslice forces. Geotechnique 17(1):11–26CrossRefGoogle Scholar
  32. Tran C, Srokosz P (2010) The idea of PGA stream computations for soil slope stability evaluation. CR Mec 338(9):499–509CrossRefGoogle Scholar
  33. Yildiz A (2009) Numerical modeling of vertical drains with advanced constitutive models. Comput Geotech 36(6):1072–1083CrossRefGoogle Scholar
  34. Zienkiewicz OC (1977) The finite element method. McGraw-Hill, London, pp 540–544Google Scholar
  35. Zolfaghari AR, Heath AC, McCombie PF (2005) Simple genetic algorithm search for critical non circular failure surface in slope stability analysis. Comput Geotech 32(3):139–152CrossRefGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  1. 1.Department of Civil EngineeringManipal Institute of TechnologyManipalIndia

Personalised recommendations