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CHF - CFA Rigs

Large Diameter Piles

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.

CHF - CFA Rigs MODELS

CH 300 – CFA

CH 300 – CFA

CH 300 – CFA

EU | US
Max pile diameter 800 mm
Max length of augers 13 m
Max length of auger extension 6,0 m
Max pile depth 13 + 6,0 = 19 m
Extraction force 320 kN
Crowd force on auger 45 kN
Max pile diameter 2’ 7”
Max length of augers 42' 8"
Max length of auger extension 19’ 8”
Max pile depth 42’ 8” + 19’ 8” = 62’ 4”
Extraction force 71,900 lbs
Crowd force on auger 10,000 lbs
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CH 450 – CFA/WPD

CH 450 – CFA/WPD

CH 450 – CFA/WPD

EU | US
Max pile diameter 1000 mm
Max length of augers 16 m
Max length of auger extension 7 m
Max pile depth 14 + 7 = 21 m
Extraction force 330 kN
Crowd force on auger 140 kN
Max pile diameter 3’ 3”
Max length of augers 50’ 10”
Max length of auger extension 23’
Max pile depth 46’ + 23’ = 69’
Extraction force 74,200 lbs
Crowd force on auger 31,470 lbs
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CH 450 – CFA

CH 450 – CFA

CH 450 – CFA

EU | US
Max pile diameter 1000 mm
Max length of augers 18,5 m
Max length of auger extension 6,0 m
Max pile depth 18 + 6,0 = 24 m
Extraction force 480 kN
Crowd force on auger 100 kN
Max pile diameter 3’ 3”
Max length of augers 60' 8"
Max length of auger extension 19’ 8”
Max pile depth 59’ 1” + 19’ 8” = 78’ 9”
Extraction force 107,900 lbs
Crowd force on auger 22,480 lbs
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CHF 500

CHF 500

CHF 500

EU | US
Max pile diameter 1000 mm
Max length of augers 21 m
Max length of auger extension 6 m
Max pile depth 21 + 6 = 27 m
Extraction force 540 kN
Crowd force on auger 45 / 100 kN
Max pile diameter 3' 33'' 
Max length of augers 69'
Max length of auger extension 19' 8''
Max pile depth 69' + 19' 8'' = 89'
Extraction force 121,396  lbs
Crowd force on auger 10,113 / 22,481 lbs 
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CH 650 - CFA/WPD

CH 650 - CFA/WPD

CH 650 - CFA/WPD

EU | US
Max pile diameter 1200 mm
Max length of augers 17.5 m
Max length of auger extension 7 m
Max pile depth 15.5 + 7 = 22.5 m
Extraction force 580 kN
Crowd force on auger 140 kN
Max pile diameter 3’ 9”
Max length of augers 57’ 5”
Max length of auger extension 23’
Max pile depth 50’ 10" + 23’ = 73’ 10"
Extraction force 130,400 lbs
Crowd force on auger 31,500 lbs
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