Fluid drag reduction combined hammer for dynamic compaction

The utility model discloses a fluid anti-drag combined hammer for dynamic compaction, which comprises a basic rammer and an anti-drag rammer, the basic rammer is in a convex shape, the bottom of the basic rammer is a cylindrical basic rammer body, a vertically extending hammer neck is integrally arranged in the middle of the top end of the basic rammer body, and the center of the top of the hammer neck is in threaded connection with a hoisting screw coaxially arranged with the hammer neck. The anti-drag rammer comprises a connecting hammer body and an anti-drag hammer head which are integrally connected, the connecting hammer body is fixedly arranged at the bottom end of the basic hammer body, the anti-drag hammer head is arranged in the middle of the bottom end of the connecting hammer body, and the anti-drag hammer head is a semi-ellipsoid-shaped protrusion. And a plurality of vertically through drainage holes are formed in the basic hammer body and the connecting hammer body on the outer side of the resist