Large Diameter Piles

CHF – CFA Rigs

CH – Multipurpose Rigs

CHF – CFA Rigs

Drilling Tools

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The Continuous Flight Auger (CFA) methodology is one of the most widespread methods of construction of cast-in-situ piles in a variety of ground conditions. It is particularly suited for piling in urban environments, thanks to the low impact in terms of noise and vibrations. The process is based on the use of a long string of hollow stem augers that are initially driven into the ground with a constant penetration speed. The auger string is then slowly extracted and the concrete is simultaneously pumped through the hollow stem creating a pile that is reinforced immediately after concreting. The Comacchio range includes a series of multipurpose piling rigs, ranging from 30 to 70 tons, which can be offered in different CFA configurations. The CHF rigs, exclusively dedicated to CFA applications, are part of this range. Their design has been optimized to offer maximum capabilities, reaching 1000 mm diameter and 27 m depth. 

All Comacchio CFA rigs can be equipped with different instrumentation solutions ensuring the control of all drilling and concreting parameters and providing production reports. This instrumentation can be integrated into the ComNect system which allows remote monitoring of the rig production and performance from anywhere in the world.

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CHF – CFA Rigs Models

CH 150 – CFA

  • Max pile diameter 750 mm
  • Max length of augers 8.5 m
  • Max length of auger extension 4.0 m
  • Max pile depth 12.1 m
  • Extraction force 170 kN
  • Crowd force on auger 60 kN

CH 300 – CFA T4

  • Max pile diameter 800 mm
  • Max length of augers 13.5 m
  • Max length of auger extension 6.0 m
  • Max pile depth 19 m
  • Extraction force 320 kN
  • Crowd force on auger 45 kN

CH 300 – CFA T4 XL

  • Max pile diameter 800 mm
  • Max length of augers 14.5 m
  • Max length of auger extension 6.0 m
  • Max pile depth 20 m
  • Extraction force 320 kN
  • Crowd force on auger 45 kN

CH 320 – CFA WPD

  • Max pile diameter 800 mm
  • Max length of augers 12.5 m
  • Max length of auger extension 7 m
  • Max pile depth 18 m
  • Extraction force 250 kN
  • Crowd force on auger 100 kN

CH – 450 CFA T4

  • Max pile diameter 1000 mm
  • Max length of augers 17 m
  • Max length of auger extension 6.0 m
  • Max pile depth 22.5 m
  • Extraction force 480 kN
  • Crowd force on auger 100 kN

CH 450 – CFA T4 XL

  • Max pile diameter 1000 mm
  • Max length of augers 18.5 m
  • Max length of auger extension 6.0 m
  • Max pile depth 24 m
  • Extraction force 480 kN
  • Crowd force on auger 100 kN

CH 450 – CFA T4 XXL

  • Max pile diameter 1000 mm
  • Max length of augers 19.5 m
  • Max length of auger extension 6.0 m
  • Max pile depth 25 m
  • Extraction force 480 kN
  • Crowd force on auger 100 kN

CH – 450 CFA WPD

  • Max pile diameter 1000 mm
  • Max length of augers 16 m
  • Max length of auger extension 7 m
  • Max pile depth 21 m
  • Extraction force 330 kN
  • Crowd force on auger 140 kN

CH – 500

  • Max pile diameter 1000 mm
  • Max length of augers 21 m
  • Max length of auger extension 6 m
  • Max pile depth 27 m
  • Extraction force 540 kN
  • Crowd force on auger 45 / 100 kN

CH – 650 CFA WPD

  • Max pile diameter 1000 mm
  • Max length of augers 17.5 m
  • Max length of auger extension 7 m
  • Max pile depth 22.5 m
  • Extraction force 580 / 700 kN
  • Crowd force on auger 140 kN

CH – 850 CFA WPD

  • Max pile diameter 1200 mm
  • Max length of augers 22 m
  • Max length of auger extension 8 m
  • Max pile depth 27.7 m
  • Extraction force 945 kN
  • Crowd force on auger 300 kN

CH 900

  • Max pile diameter 1200 mm
  • Max length of augers 27 m
  • Max length of auger extension 6 m
  • Max pile depth 32.5 m
  • Extraction force 1120 kN
  • Crowd force on auger 150 kN