Numerical simulation of screw displacement pile interaction with non-cohesive soil

A trial numerical simulation of screw displacement pile interaction with non-cohesive subsoil during the transfer of compression load is described. The simulation was carried out in an axisymmetric system using the Plaxis 2D-FEM computer programme. The technological phases of pile installation in the ground were numerically modelled using equivalent processes which provided similar effects to real technical actions. The results of the numerical calculations were verified by comparing them with the load test results of a real pile in the field. The analysis shows that, apart from the technological elements, a proper numerical simulation of screw displacement pile interaction with non-cohesive soil also needs to take into account soil characteristics as defined in the critical state theory.