A pile is driven from a pile head to predetermined depth by the weight of a pile, and pressing fit through a pile hollow part for the spoil which bored the soil layers at the tip of a pile by auger flight inserted in the pile hollow part. Top of pile is hammered with a drop hammer etc. after that, and the same bearing capacity as a conventional piling by hammering is made to ensure.

It is accompanied by vibration and noise at the time of the final hammering.
For application diameter of pile,about 400-1000mm and the maximum piles length are about 110 times of pile diameter and 80m.

• 1Positioning the lower pile having hollow part, in which auger flights are inserted.
• 2Connect auger flights with the auger drive unit which is mounted on the leader of the piling rig.
• 3Rotate earth auger and boring the pile tip soil layer.
  Generally compressed air is blown off from an auger head tip, and a pile is driven, discharging spoil from top of pile through a pile hollow part by the lifting action.
• 4Connect a lower pile and an upper one after connecting auger flights in a lower pile with the ones in upper pile.
• 5Pull up earth auger flights, add a blow with the drop hammer which is mounted on the leader and drive a pile tip into the predetermined depth of bearing layers.