After carrying out the pre- boring of the soil layers by Earth auger,bearing capacity is made to ensure by the hammering.

It uses in many cases in order to reduce vibration and noise, the case where there are hard sub layers and a piling cannot penetrate.

For application pile diameter, about 300-800mm and the maximum pile length are about 110 times of pile diameter.

• 1Boring the soil layers by earth auger.
• 2Boring to specified depth and pull up earth auger.
• 3Install a pile to a bored hole, put the hammer cap after installation on pile head, and check the perpendicularity of a pile.
• 4Perform hammering with a hammer.
• 5If bearing capacity is presumed and the demanded bearing capacity is acquired from the amount of penetration and the amount of rebound at the time of a blow, and complete.