Experimental Assessment of Influence of Air-Driven Hammer Energy Parameters on Unit Displacement of Pipes in Vibropercussion Driving

The article focuses on the upward potential of efficiency in vibropercussion driving of steel structural tubing shapes in soil by means of improvement of interaction between the components of the air-driven hammer–pipe–soil system. The preproduction model of a generator with the stepped adjustment of the movement intensity of the traveler member via transition to the increased pressure of an energy source is described. The experimental modeling data on penetration process are reported as function of loading of a pipe string by the equipment with different kinetic parameters—mass and piston–anvil co-impact velocity. It is determined how these parameters influence amplitudes of generated power pulses and the resultant advance of a pipe per unit impact in the elastoplastic soil mass.