{"id":32965,"date":"2026-04-07T17:18:33","date_gmt":"2026-04-07T15:18:33","guid":{"rendered":"https:\/\/www.soletanche.pl\/?page_id=32965"},"modified":"2026-04-09T11:56:39","modified_gmt":"2026-04-09T09:56:39","slug":"cfa-piles","status":"publish","type":"page","link":"https:\/\/www.soletanche.pl\/en\/our-offer\/techniques\/cfa-piles\/","title":{"rendered":"CFA Piles"},"content":{"rendered":"

CFA Piles<\/h2><\/div>

CFA (Continuous Flight Auger) piles are one of the most widely recognized and commonly used piling technologies.<\/strong><\/h3><\/div>

CFA piles are formed using a continuous flight auger mounted on a tubular core. This method allows for pile installation even in dense or stiff-plastic soil layers, enabling broad applicability and achieving significant pile lengths without the need for casing or bentonite slurry.\u00a0<\/p>\n<\/div>

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CFA technology description<\/strong><\/h2><\/h3><\/div>

At the start of the process, the auger is drilled into the ground, displacing and loosening the soil. Once the design depth is reached, the auger is systematically withdrawn, and the resulting borehole is filled from the bottom with concrete pumped through the auger stem.<\/p>\n

Bottom-up concrete placement under pressure stabilizes the soil at the pile tip and along the shaft, preventing collapse or sloughing of the borehole, and ensures effective interaction between the concrete element and the surrounding soil. After concreting, the pile is reinforced with a reinforcement cage or steel section placed into the fresh concrete.<\/p>\n<\/div>

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Environmental efficiency of CFA Piles <\/i><\/h2><\/div>

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The threaded pile technology developed by Soletanche Bachy contributes to reducing the carbon footprint of projects.<\/p>\n

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  • Reduced concrete consumption<\/strong> \u2013 threaded piles allow for more efficient load transfer. In many cases, this enables the use of smaller diameter piles or fewer piles compared to conventional solutions. Lower concrete demand directly reduces CO\u2082 emissions associated with its production.<\/li>\n
  • Reduced spoil volume<\/strong> \u2013 the technology partially compacts and displaces soil around the pile instead of fully removing it. As a result, excavated material volumes are significantly lower than in traditional bored pile methods, reducing the need for transport and disposal.<\/li>\n<\/ul>\n<\/div>
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