Numerical Analysis of Uplift Bearing Behavior of Vortex Squeezed and Expanded Piles

Abstract

The original rule test and the model test can only study part of the working conditions and parameter changes. The numerical simulation method is used to study the bearing characteristics of the engineering pile under more complicated working conditions, and the bearing characteristics of the squeezed pile under the influence of multi-parameter changes are studied. law. The ABAQUS numerical simulation software was used to study the effects of nonlinear stress-strain relationship, nonlinear contact of pile-soil and constraints of squeezed-extended boundary conditions. The analysis results show that the bearing capacity of the non-extruded piles is only caused by the friction between the pile and the soil when the pressure load is applied. The pile-side foundation does not undergo significant deformation and displacement; the piles are subjected to pressure loads. At the time of the pile foundation soil, compression occurs at the end of the enlarged diameter portion, and local shear failure occurs.