Advertisement

Lateral Response of Drilled Shafts in A Moving Cohesive Soil

  • Mohammad M. YaminEmail author
  • Mousa F. Attom
  • Zahid Khan
Research paper
  • 16 Downloads

Abstract

Three-dimensional finite element (FE) analysis was carried out to investigate the behavior of a single row of drilled shafts installed in an unstable slope and to determine the soil pressures acting on the shafts. ABAQUS program was used and the built-in Mohr–Coulomb constitutive model was employed to model the elastic–plastic behavior of the purely cohesive soil, while the drilled shaft was assumed to behave as linear elastic. The length of the drilled shaft is 10 m with a diameter of 1 m. The center-to-center spacing between drilled shafts was taken as 2 m. Slope movement was simulated by imposing a uniform horizontal movement of the soil adjacent to the shaft. Soil pressures along the shaft were recorded at several uniform lateral soil movements until the ultimate soil movement was reached. Cohesion of soil was varied in the FE simulations from 30 to 100 kPa to study its influence on the soil pressure profiles. The effect of shaft stiffness on soil pressures was also included in the study through the relative shaft/soil flexibility factor KR. Two cases of drilled shafts were considered: (1) stiff shaft with KR = 2.9; and (2) flexible shaft with KR = 0.00004. Soil pressures from FE analyses were idealized and simplistic equations were developed and presented which will allow prediction of soil pressures acting on flexible and stiff shafts. The computed ultimate soil pressures agreed well with those from the literature. The computed soil movement to fully mobilize the ultimate contact pressure was found to vary from 10 to 35% of drilled shaft diameter (D) for flexible shafts and from 7 to 15% of the drilled shaft diameter for stiff shafts depending on soil cohesion. The relative displacement between the moving soil and the moving drilled shaft for the contact pressure to be fully mobilized at the soil/shaft interface was found to range from 3 to 15% of the shaft diameter.

Keywords

Drilled shafts Cohesive soil FEM Soil movement 

Notes

Compliance with ethical standards

Conflict of interest

On behalf of all authors, the corresponding author states that there is no conflict of interest.

References

  1. 1.
    Ito T, Matsui T, Hong PW (1981) Design method for stabilizing piles against landslide—one row of piles. Soils Found 21(1):21–37CrossRefGoogle Scholar
  2. 2.
    Reese LC, Wang ST, Fouse JL (1992) Use of drilled shafts in stabilizing a slope. Stability and Performance of Slopes and Embankments-II, Vol. 2. ASCE 2:1318–1322 (Geotechnical Special Publication No. 31) Google Scholar
  3. 3.
    Poulos HG (1995) Design of reinforcing piles to increase slope stability. Can Geotech J Ott Can 32:808–818CrossRefGoogle Scholar
  4. 4.
    Hassiotis S, Chameau JL, Gunaratne M (1997) Design method for stabilization of slopes with piles. J Geotech Geoenviron Eng 123(4):314–323CrossRefGoogle Scholar
  5. 5.
    Liang R, Zeng S (2002) Numerical study of soil arching mechanism in drilled shafts for slope stabilization. Soils Found Jpn Geotech Soc 42(2):83–92CrossRefGoogle Scholar
  6. 6.
    Liang R, Yamin M (2009) Lesson from instrumented slope stabilization project using drilled shafts. International Foundation Congress and Equipment Expo, Orlando.  https://doi.org/10.1061/41021(335)13(March 15–19) CrossRefGoogle Scholar
  7. 7.
    Li H, Liu S, Tong L, Wang K, Ha S (2018) Estimating py curves for clays by CPTU method: framework and empirical study. Int J Geomech ASCE.  https://doi.org/10.1061/(asce)gm.1943-5622.0001301 CrossRefGoogle Scholar
  8. 8.
    Goh ATC, The CI, Wong KS (1997) Analysis of piles subjected to embankment induced lateral soil movements. J Geotech Geoenviron Eng ASCE 123(9):792–801CrossRefGoogle Scholar
  9. 9.
    Pan J, Goh A, Wong K, The C (2000) Model tests on single piles in soft clay. Can Geotech J 37:890–897CrossRefGoogle Scholar
  10. 10.
    Pan J, Goh A, Wong K, Selby A (2002) Three-dimensional analysis of single pile response to lateral soil movements. Int J Numer Anal Meth Geomech 26:747–758CrossRefGoogle Scholar
  11. 11.
    Kelesoglu M, Cinicioglu S (2010) Free-field measurements to disclose lateral reaction mechanism of piles subjected to soil movements. J Geotech Geoenviron Eng 136(2):331–343CrossRefGoogle Scholar
  12. 12.
    Nguyen H, Khabbaz H, Fatahi B, Kelly R (2016) Bridge pile response to lateral soil movement induced by installation of controlled modulus columns. Procedia Eng Elsevier 143:475–482.  https://doi.org/10.1016/j.proeng.2016.06.060 CrossRefGoogle Scholar
  13. 13.
    Li Q (2017) Investigation of drilled shafts under axial, lateral, and torsional loading. Oregon State UniversityGoogle Scholar
  14. 14.
    Saeedi Azizkandi A, Kashkooli A, Baziar MH (2014) Prediction of uplift pile displacement based on cone penetration tests (CPT). Geotech Geol Eng 32:1043–1052.  https://doi.org/10.1007/s10706-014-9779-y CrossRefGoogle Scholar
  15. 15.
    Baziar MH, Rafiee F, Saeedi Azizkandi A, Lee CJ (2018) Effect of super-structure frequency on the seismic behavior of pile-raft foundation using physical modeling. Soil Dyn Earthq Eng 104:196–209CrossRefGoogle Scholar
  16. 16.
    Azizkandi AS, Baziar MH, Yeznabad AF (2018) 3D dynamic finite element analyses and 1 g shaking table tests on seismic performance of connected and nonconnected piled raft foundations. KSCE J Civil Eng 22:1750–1762.  https://doi.org/10.1007/s12205-017-0379-2n(Oregon State University) CrossRefGoogle Scholar
  17. 17.
    Poulos HG, Chen LT (1997) Pile response due to excavation – induced lateral soil movement. J Geotech Eng ASCE 123(2):94–99CrossRefGoogle Scholar
  18. 18.
    Brown DA, Shie CF (1990) Three-dimensional finite element model of laterally loaded piles. Comput Geotech 10:59–79CrossRefGoogle Scholar
  19. 19.
    Stewart DP, Jewell RJ, Randolph M (1994) Design of piled bridge abutments on soft clay for loading from lateral soil movements. Geotechnique 44(2):277–296CrossRefGoogle Scholar
  20. 20.
    Bransby MF, Springman S (1999) Selection of load-transfer functions for passive lateral loading of pile group. Comput Geotech 24(3):155–184CrossRefGoogle Scholar
  21. 21.
    Chen LT (1994) The effects of lateral soil movements on pile foundations. Ph.D. thesis, University of Sydney, Sydney, Australia.Google Scholar
  22. 22.
    Liang R, Yamin M (2010) Three-dimensional finite element study of arching behavior in slope/drilled shaft system. Int J Numer Anal Meth Geomech 34(11):1157–1168.  https://doi.org/10.1002/nag.851 CrossRefzbMATHGoogle Scholar
  23. 23.
    Kahyaoglu M, Imancli G, Onal O, Kayalar A (2011) Numerical analyses of piles subjected to lateral soil movement. KSCE J Civil Eng 16(4):562–570CrossRefGoogle Scholar
  24. 24.
    Qin H, Guo WD (2013) Group effects of piles due to lateral soil movement. Int J GEOMATE 4(1):450–455Google Scholar
  25. 25.
    Qin H, Guo W (2016) Response of piles subjected to progressive soil movement. Geotech Test J 39(1):106–125.  https://doi.org/10.1520/GTJ20140148 MathSciNetCrossRefGoogle Scholar
  26. 26.
    Chaoui F, Magnan JP, Mestat P, Delmas P (1994) Three-dimensional analysis of the behavior of piles in unstable slopes. In: 8th International conference, Computer methods and advances in geomechanics; 1994; Morgantown; WV in Computer Methods and Advances in Geomechanics, Vol. 3; pp 2297–2302.Google Scholar
  27. 27.
    Hibbitt, Karlsson, and Sorensen, Inc., Pawtucket RI (1998) ABAQUS: standard user’s manual version 5.8, vol 3Google Scholar
  28. 28.
    Miao L, Goh A, Wong K, The C (2006) Three-dimensional finite element analyses of passive pile behavior. Int J Numer Anal Meth Geomech 30:599–613CrossRefGoogle Scholar
  29. 29.
    Poulos HG (1973) Analysis of piles in soil undergoing lateral movement. J Soil Mech Found Div ASCE 99(5):391–406Google Scholar
  30. 30.
    Viggiani C (1981) Ultimate lateral load on piles used to stabilize landslides. In: International society for soil mechanics and geotechnical engineering, proceedings of 10th international conference, vol 3, ISSMGE, Stockholm, 15–19 June, 1981, Rotterdam, pp 555–560Google Scholar
  31. 31.
    De Beer EE, Wallys M (1972) Forces induced in piles by unsymmetrical surcharges on the soil around the piles. Fifth Eur Conf On Soil Proc /Sp/, 1972. Transp Road Res Lab (TRRL) 1:325–332Google Scholar
  32. 32.
    Chen LT, Poulos HG (1997) Piles subjected to lateral soil movements. J Geotech Geoenviron Eng ASCE 123(9):802–811CrossRefGoogle Scholar
  33. 33.
    Matlock H (1970) Correlations for design of laterally loaded piles in soft clay. In: Proceedings of the second annual offshore technology conference, vol 1, Houston, Texas, paper No. (OTC 1204), pp 577–594.  https://doi.org/10.4043/1204-MS
  34. 34.
    Broms BB (1964) Lateral resistance of piles in cohesive soils. J Soil Mech Found Div 90(2):27–64Google Scholar
  35. 35.
    Maugeri M, Motta E (1992) Stresses on piles used to stabilize landslides. In: Balkema AA (ed) Landslide, Proc. 6th International Symposium, Christchurch, 10 – 14 February 1992. ISBN 905410032x, Bell, Rotterdam, the Netherlands, pp. 785 – 790.Google Scholar

Copyright information

© Iran University of Science and Technology 2020

Authors and Affiliations

  • Mohammad M. Yamin
    • 1
    Email author
  • Mousa F. Attom
    • 2
  • Zahid Khan
    • 2
  1. 1.Department of Mechanical and Civil EngineeringMinnesota State UniversityMankatoUSA
  2. 2.Department of Civil EngineeringAmerican University of SharjahSharjahUAE

Personalised recommendations