Title: Field Tests and Numerical Simulation of Geotextile-encased Granular Columns
Abstract: Geotextile-encased granular columns can be installed in soft soil with large diameters. They can penetrate large particle coarse fill and be constructed under deep water. The geotextile-encased granular column consists of geotextile and crushed stone. The geotextile can provide lateral restraint of crushed stone under a vertical load. This granular column can accelerate the consolidation of soft soil, increase bearing capacity, and reduce the deformation of the foundation. In this study, the geotextile-encased granular columns were used to strengthen soft foundations. Plate loading test was used to evaluate the reinforcement effect. The numerical software, PLAXIS, was used to simulate the composite foundation of geotextile-encased granular column. Numerical analysis of the foundation deformation characteristics are by changing the parameter of geotextile stiffness. This parameter can be optimized for better performance during design and construction.