The composite foundation method uses dynamic compaction, hole-punching, and gravel pile consolidation. A rocket hammer punches a hole, gravel is added, and the hammer compacts it, displacing and consolidating surrounding soft soil to form dense gravel piles. The pile tops are recompacted. This replaces reclaimed soil and densifies surrounding soil through the hammer's impact energy. | GIGadgets

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Dynamic compaction (DC), also known as dynamic deep compaction, was advanced in the mid-1960s by Louis Menard. The process involves dropping a heavy weight on the surface of the ground to compact soils to depths as great as 12.5 m. The purpose of this method is to reduce foundation settlements, reduce seismic subsidence and liquefaction potential, permit construction on fills, densify garbage dumps, and reduce settlements in collapsible soils. This method is most effective in permeable, granular

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