What happens to loose soil during the filling process?

During the filling process, loose soil does not automatically compact itself. While some degree of natural compaction may occur due to the weight of the overlying soil or equipment passing over it, this is often insufficient for achieving the desired density and stability for construction purposes. Therefore, it is typically necessary to manually compact the soil using equipment such as a vibratory roller or plate compactor to remove air pockets, reduce settlement, and enhance the load-bearing capacity of the soil. Proper compaction is critical to prevent future issues such as sinking or shifting of the fill material, which could compromise the integrity of structures built on or near the filled soil.