A pilot scale field test was conducted to evaluate the effectiveness of constructing a geogrid –reinforced pile-supported earth platform over soft subsoil to reduce settlement, and the results are pre-sented herein. Three-by-three pile groups with varying center-to-center spacing were driven into a layer of soft marine clay. A layer of geogrid was used as reinforcement over each pile group. The settlement of the soft clay layer due to the construction of an earth embankment was measured along with the strain in the geogrid on the top of the pile caps. The variations in the settlement of clay as well as the strain in the geogrid with the center-to-center spacing of the piles in a group have been analyzed.