Predictions of physical characteristics and shear strength properties for friction root ground support system in sands are proposed. This study addresses the significance changes of bearing capacities and settlements of coarse sands with and without Polyurethane foams which precisely dealt with undisturbed soils and stabilized soils, respectively. Furthermore, the study permits a reliable prediction of physical characteristics of the soils via physical properties tests and shear strength behaviors of Polyurethane foams via Unconfined Compression Tests. The evaluated parameters are obtained from field works, site investigation report and previous researches, whilst the simulation is done with Plaxis Finite Element. To anticipate, it is observed that a slight changes in settlements and bearing capacities occurred with respect to the injection of Polyurethane foams.