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High Quality Percussion Rotary Drill

Technology

We, SUNGWON Heavy Machinery, have been manufacturing and supplying rock,
soil drilling equipment and tools of DTH Hammers, Hammer Bits and Auger
Machines in Korea.

  • Technology
  • Construction method
  • PRD

Construction method

Percussion Rotary Drill

As a method that combines the S.D.A (Separation Doughnut Auger) method and T4 method, this method can be used for the boring of boulders and shore layers which are difficult to bore using the S.D.A method. In the case of working with the existing SDA method, a screw is fixed to the inner auger near the casing but a screw needs to be fixed to the fore-end using a T4 hammer with the PRD method, so that the boring of very difficult strata has been impossible. With our method, the boring of all strata, such as buried layers and boulder layers, is possible.

Features
  • This method causes almost no disturbance and uplift of surrounding ground because of air by using low-pressure air.
  • As the casing is a pile, the surrounding frictional force largely removes soil from the inside of the casing with air.
  • Thus, fore-end bearing layers can be confirmed with the naked eye and the bearing capacity is assured.
  • This method greatly improves working efficiency and the casing and hammering can be done at the same time, shortening the period of work time.
  • As low-pressure and low-noise machines are used, surrounding conditions are not a consideration.
  • Hitting isn’t necessary, so there are no serious problems of noise and few l complaints from residents.
  • Consumption of materials is about 5% and there is no hitting, so the head part and piles receive almost no damage. bearing layers.

Construction steps