This paper presents the results of numerical analysis by using 10-noded PLAXIS 3D software. A drained analysis was carried out using Mohr–Coulomb’s model for soft soil and granular piles. 120 × 4 × 40 m soft soil deposit is used to place a raft of size 16 × 4 m at 2 m below the ground level. The soil was reinforced with a group of six granular piles arranged in square pattern, each having diameter 1 m, at 2.5 m c/c spacing and of length 10 m. The ground response (in terms of amplification) is studied for the imposed 1990 Upland, USA earthquake of magnitude 5.4 data (acceleration versus time) under two situations namely the one without the granular piles below the raft and the other with the granular piles. Amplification is the ratio of value at surface to ground input motion in the form acceleration for this study. The peak amplification value corresponding to unimproved and improved soil is obtained as 41.12 and 4.36 respectively. Thus, significant reduction in peak amplification is exhibited by inclusion of granular piles in soft soils.