Numerical simulation of displacement model pile test performed in artificial sand deposit

Abstract

Very often the numerical simulations are based on full scale instrumented and small scale model pile tests. Most of the parameters necessary for modeling of full scale piles is usually derived from in situ tests profiles. This common practice generates a significant amount of uncertainties. Therefore, another pile testing technique - centrifuge test is often used as alternative. Despite its acknowledgment and wide usage, it has some shortcomings, such as scale effects. This paper presents the original experimental and numerical study, performed in comprehensively explored artificial sand deposit, using large scale model pile test and FEM analysis. For the numerical simulation the Hardening soil model was used in order to reproduce highly nonlinear predominant performance of pile base. After the FEM analysis, it was concluded, that shaft capacity mainly depends on the radial stress which were induced in the adjacent soil during installation process. It was also reported, that base capacity strongly depends on pre – consolidation stress, and was highlighted the most important parameter which influences the base load – settlement performance when HS model is used.