In the present study, the efficacy of geogrid reinforcement, as well as stone column combination, was assessed to enhance the bearing capacity of silty clay soil under a circular raft foundation of 31 m diameter. The geogrid layers of axial stiffness of 650 KN/m were laid in two layers within the compacted sand bed of thickness 700 mm. Stone columns of 800 mm dia. were positioned in a square grid pattern under the geogrid reinforced sand pad at 1.8 m c/c. The total consolidation settlement of the existing soil (C=5.91t/m2, Φ=30º, mv=0.004 m2/t) was found to be 275.14 mm under a vertical pressure of 20 t/m2 on the raft foundation. Analytical computations and numerical modeling using PLAXIS-3D software were carried out to estimate the enhanced bearing capacity of the studied soil with the application of geogrid reinforced sand pad and stone column combinations. The two geogrid layers were provided at a vertical interval of 0.2 m and 0.45 m, respectively, below the raft bottom in the compacted sand pad. The aforementioned combinations (geogrid reinforcement and stone columns) of the ground improvement system under the raft foundation enhanced the ultimate bearing capacity by 27.35 %, and reduced settlement by 62.43% compared to the absence of any ground improvement scheme. The analytical and numerical modeling results closely corroborated with each other. The results indicate that the aforesaid ground improvement scheme is an effective solution for installing a foundation in soft soil with low shear strength.