• 1 Set up the equipment at the site.
  • 2 Perform drilling using a flight auger screw.
  • 3 Drilling to the desired depth, inject concrete, and retract the flight auger screw.
  • 4 Insert reinforcement bars and complete the lead blade finishing.


  • 1 The CFA method specializes in urban areas or locations with high groundwater levels due to its low noise and vibration characteristics.
  • 2 Using a flight auger screw, drilling is carried out to the desired depth, simultaneously discharging excavated soil. The screw is then lifted, and concrete is injected. Subsequently, reinforced steel bars are inserted to enhance additional stability and bearing capacity while the concrete sets.
  • 3 It is suitable for various geological conditions, including soil, gravel, sediment, and some fractured rock formations.