The results from FEM modeling with Abaqus or Elfen show that there is no punch through potential at the current location. The result from Abaqus Explicit shows a risk of rapid penetration for larger preload however Elfen results stand between the Abaqus results. The conventional analysis modified for the current layered soil profile shows a punch through risk close to the maximum preload. Although this analysis was modified based on our FEM experiences and field observations, it still gives a conservative evaluation of the current situation. The numerical results, combined with the visual evidence from the centrifuge testing and field monitoring allows for reassessment of the conventional methods of analysis.
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