ABSTRACT
In this study, the effects of the reinforcement of the subsoil with sand and geotextile on the deformation and settlements of soft soil have been investigated. A sand layer with its thickness proportional to the base width of the foundation has been placed on the subsoil and the most effective placement of the geotextile has been investigated. The analysis has been carried out using a finite element program based on Critical State Theory, called CRISP. The results have shown that a reinforced sand fill over the soft soil and a geotextile reinforcement placed on this subbase increases the load carrying capacity of the subsoil. Failures and excessive settlements can be considerably avoided and safety of the building can be improved with the proper choice of the placement and properties of the sand fill and the reinforcing geotextile.
