Prediction of Force Displacement Behavior of Pad Foundation on Lagoon Clay Soil
Keywords:
Bearing capacity, validation, effective stress path, total stress path, un-drained, foundationAbstract
The determination of bearing-capacity is more challenging when complicated cases are encountered. This research aim to build a numerical (FE) model of an axi-symmetric (square) shallow foundation under vertical load to determine its load-deformation behavior, using appropriate constitutive models and soil properties derived from laboratory and/or in-situ test data. To achieve this aim, the soil parameter were calibrated, then un-drained response model was developed using both total and effective stress-based analyses, then the effects of meshing and mesh refinement on the results was done and the simulation results were validated against measured load-test data. From the results it was observed that the mesh refinement has a significant effect on the Plaxis calculation time period, the output results and number of iteration it takes to achieve a specified result. Thereafter, it was observed that the total stress path analysis using Mohr-coulomb model predictions were very conservative and below the real field results. Finally, it was observed that both effective and total stress path analysis experienced general shear failure. It can thus be concluded that effective stress path analysis using Modified cam clay model predictions were closed to real field results compared to total stress path analysis.