Geomechanics and Engineering

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Numerical study on the optimal position of a pile for stabilization purpose of a slope

  • Boulfoul, Khalifa (Department of Civil Engineering, Faculty of Science, Mustapha Ben Boulaid, Batna2 University) ;
  • Hammoud, Farid (Department of Civil Engineering, Faculty of Science, Mustapha Ben Boulaid, Batna2 University) ;
  • Abbeche, Khelifa (Research Laboratory of Applied Hydraulics RLAHYA, Department of Civil Engineering, Faculty of Science, Mustapha Ben Boulaid, Batna2 University)
  • Received : 2019.07.10
  • Accepted : 2020.04.03
  • Published : 2020.06.10
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Abstract

The paper describes the influence of pile reinforcement on the stability of the slope behaviour, and the exploitation of the results of in situ measurements will be conducted. In the second part, a 2D numerical modelling will be conducted by using the finite element code PLAXIS2D; in order to validate the proposed modelling approach by comparing the numerical results with the measurements results carried out on the slides studied; to study the effect of positioning of piles as a function of the shear parameters of the supported soil on the behaviour of the soil. For various shear strength of the soil a row of pile position is found, at which the piles offer the maximum contribution to slope stability. The position of piles is found to influence the safety factor in granular soil whereas it shows a slight influence on the safety factor in coherent soil. The results also indicate that the ideal position for such stabilizing piles is in the middle height of the slope. Comparison of results of present study with literature from publication: indicated that to reach the maximum stability of slope, the pile must be installed with Lx/L ratio (0.37 to 0.62) and the inclination must be between 30° to 60°. Even, after a certain length of the pile, the increasing will be useless. The application of the present approach to such a problem is located at the section of PK 210+480 to 210+800 of the Algerian East-West Highway.

Keywords

Acknowledgement

We would like to show our gratitude to laboratory the company COJAAL, and we thank two anonymous reviewers for their so-called insights for their comments on an earlier version of the manuscript.

References

  1. Abdelaziz, A., Hafez, D. and Hussein, A. (2017), "The effect of pile parameters on the factor of safety of piled- slopes using 3D numerical analysis", HRBC J., 13(3), 277-285. https://doi.org/10.1016/j.hbrcj.2015.06.002.
  2. Ausilio, E., Conte, E. and Dente, G. (2001), "Stability analysis of slopes with piles", Comput. Geotech., 28(8), 591-611. https://doi.org/10.1016/S0266-352X(01)00013-1.
  3. Fenu, L., Briseghella, B. and Marano, G.C. (2018), "Optimum shape and length of laterally loaded piles", Struct. Eng. Mech., 68(1), 121-130. http://doi.org/10.12989/sem.2018.68.1.121.
  4. 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.
  5. Jeong, S., Kim B., Won, J. and Lee J.Y. (2003), "Uncoupled analysis of stabilizing piles in weathered slopes", Comput. Geotech., 30(8),671-682. https://doi.org/10.1016/j.compgeo.2003.07.002.
  6. Jiang, S., Du, C. and Sun, L. (2018), "Numerical analysis of sheet pile wall structure considering soil-structure interaction", Geomech. Eng., 16(3), 309-320. http://doi.org/10.12989/gae.2018.16.3.309.
  7. Kahyaoglu, M.R., Imancli, G., Onal, O. and Kayalar, A.S. (2012), "Numerical analyses of piles subjected to lateral soil movement", KSCE Civ. Eng. J., 16(4), 562-570. https://doi.org/10.1007/s12205-012-1354-6.
  8. Li, X., He, S., Luo, Y. and Wu, Y. (2011), "Numerical studies of the position of piles in slope stabilization", Geomech. Geoeng., 6(3), 209-215. https://doi.org/10.1080/17486025.2011.578668.
  9. Munawir, A., Dewi, S.M., Zaika, Y. and Soehardjono, A. (2013), "Bearing capacity on slope modelling with composite bamboo pile reinforcement", Int. J. Eng. Adv. Technol., 2(5), 114-118.
  10. Nian, T.K., Chen, G.Q., Luan, M.T., Yang, Q. and Zheng, D.F. (2008), "Limit analysis of the stability of slopes reinforced with piles against landslide in nonhomogeneous and anisotropic soils", Can. Geotech. J., 45(4), 1092-1103. https://doi.org/10.1139/T08-042.
  11. Tran, A.T., Kim, A.R. and Cho, G.C. (2019), "Numerical modeling on the stability of slope with foundation during rainfall", Geomech. Eng., 17(1), 109-118. http://doi.org/10.12989/gae.2019.17.1.109.
  12. Ugai, K. and Leshchinsky, D. (1995), "Three-dimensional limit equilibrium and finite element analysis: A comparison of results", Soils Found., 35(4), 1-7. https://doi.org/10.15866/irece.v8i1.11147.
  13. Wei, W.B. and Cheng, Y.M. (2009), "Strength reduction analysis for slope reinforced with one row of piles", Comput. Geotech., 36(7), 1176-1185. https://doi.org/10.1016/j.compgeo.2009.05.004.
  14. Won, J., You, K., Jeong, S. and Kim, S. (2005), "Coupled effects in stability analysis of pile-slope systems", Comput. Geotech., 32(4), 304-315. https://doi.org/ 10.1016/j.compgeo.2005.02.006.
  15. Wu, J.J., Cheng, Q.G., Liang, X. and Cao, J.L. (2014), "Stability analysis of a high loess slope reinforced by the combination system of soil nails and stabilization piles", Front. Struct. Civ. Eng., 8(3), 252-259. https://doi.org/10.1007/s11709-014-0260-z.
  16. Xu, J., Li, Y. and Yang, X. (2018), "Stability charts and reinforcement with PILEs in 3D nonhomogeneous and anisotropic soil slope", Geomech. Eng., 14(1),71-81. http://doi.org/10.12989/gae.2018.14.1.071.
  17. Yang, S., Ren, X. and Zhang, J. (2011), "Study on embedded length of piles for slope reinforced with one row of piles", J. Rock Mech. Geotech. Eng., 3(2), 167-178. https://doi.org/10.3724/sp.j.1235.2011.00167.

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