Numerical analysis of short pile under oblique pull out in sandy soil

In many cases, piles have been used to counteract the pull out force for engineering purpose. In this research, the behavior of short pile at oblique loading angles and in sandy soils was investigated using Flac3D software with nonlinear geometry analysis [with a slenderness ratio (λ = L / B) less than 10]. The soil behavioral model was selected with Mohr-Coulomb model and the analyzes were performed in large strain model. In this study, reinforced concrete pile with a cross section of 1.2x1.2 m, which buried in dense sand soil with a depth of 10 m was considered. According to the numerical results, the relations provided by Das and Seeley (1975) were challenged. The load-displacement curve was presented with different uplift load inclination angles, based on which the uplift capacity of the pile increases with the addition of the horizontal component of force. For instance, at a load of 60 degrees, the uplift capacity of the pile was increased by 25%.Furthermore vertical displacement and pile deflection versus load application angle was plotted based on the numerical results. Also, a significant relation has been found between the β coefficient introduced by Ismael and Al-Sanad (1994), and the slenderness ratio (λ) according to other laboratory studies and numerical results of this study.