Finite Element Analysis on Behavior of Single Battered Pile in Sandy Soil Under Pullout Loading

Document Type : Original Article


Civil Engineering Department, University of Technology, Baghdad, Iraq


Batter piles are the piles driven in the soil at an inclination with the vertical to withstand oblique loads or large horizontal loads and have been widely used to support high buildings, offshore buildings, and bridges. These constructions are risky because of the exposure to moments and overturning resulting from winds, waves, and ship impact. A 3D FEA using PLAXIS 3D software was used to investigate the effect of several variables that affect the behavior of single batter piles under pull-out loads. The study is achieved on a steel pipe pile model embedded in a dry sandy soil with three relative densities (loose, medium, and dense) at different inclination angles and three embedment ratios, L/D of 25, 37.5, and 50, respectively. The numerical results showed that the ultimate pull-out resistance of the battered pile raise as the battered angle increases reaches a maximum value, then decreases. The ultimate pull-out load capacity of a single battered pile is directly proportional to the slenderness ratio and relative density; the ultimate pull-out load increases with the increase in the ratio of slenderness and relative density.  The ultimate uplift load of the battered pile was less affected by the free-standing length. Vertical and battered piles at a battered angle of (10ᵒ and 20ᵒ) and free-standing lengths equal to zero have higher ultimate pull-out capacity; by increasing the free-standing length, the ultimate pull-out capacity decreased.


Main Subjects

  1. Zhang, L., McVay, M., and Lai, P., "Centrifuge modelling of laterally loaded single battered piles in sands". Canadian Geotechnical Journal, Vol. 36, No. 6, (1999), 1074-1084.
  2. Bose, K., and Krishnan, A. "Pullout capacity of model piles in sand". Indian Geotechnical Society Chennai Chapter, Student Competition Paper, (2009), 49-54.
  3. Rahimi, M., and Bargi, K., “Efficient arrangement of batter piles of a pile-supported wharf in the sand”, Electronic Journal of Geotechnical Engineering, Vol. 15 (2010), 729-738.
  4. Nazir, A., and Nasr, A. "Pullout capacity of batter pile in sand". Journal of Advanced Research, 2, (2013), 147-154.
  5. Gaaver, K. "Uplift capacity of single piles and pile groups embedded in cohesionless soil". Alexandria Engineering Journal, 52, No. 3, (2013), 365-372,
  6. Al-Neami, M. Rahil, F., and Al-Bayati, K., "Bearing capacity of batter piles embedded in sandy soil". International Journal of Geotechnical Engineering, Vol. 10, No. 5, (2016), 529-532,      
  7. Teklearegay, W., "Numerical Investigation of Single Batter pile Due to Inclined Loads". AAU Institutional Repository, (2020).
  8. Vali, R. "Water Table Effects on the Behaviors of the Reinforced Maine Soil-footing Systems". Journal of Human, Earth, and Future, Vol. 2, No. 3, (2021), 296-305.
  9. Russo, G., Marone, G., and Di Girolamo, L., "Hybrid Energy Piles as a Smart and Sustainable Foundation". Journal of Human, Earth, and Future, Vol. 2, No. 3, (2021), 306-322.
  10. Waterman, D., "Structural elements and excavations". Presentation in CG1 Chile, (2006).
  11. Budhu, M. "Soil mechanics and foundations" Wiley, No. 1, (2020).