Continuous Flight Augering (CFA)

Continuous flight augering (CFA), also known as auger cast piling, is a technique used in construction to create a concrete deep foundation. Continuous flight auger has been used in the United Kingdom since 1966, but its use is relatively new in the United States. A continuous flight auger drill is used to excavate a hole and concrete is injected through a hollow shaft under pressure as the auger is extracted. Reinforcement is then inserted after the auger is removed.This creates a continuous pile without ever leaving an open hole. Continuous
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Augercast Pile

Augercast pile An augercast pile, often known as a continuous flight augering (CFA) pile, is formed by drilling into the ground with a hollow stemmed continuous flight auger to the required depth or degree of resistance. No casing is required. A cement grout mix is then pumped down the stem of the auger. While the cement grout is pumped, the auger is slowly withdrawn, conveying the soil upward along the flights. A shaft of fluid cement grout is formed to ground level. Reinforcement can be installed. Recent innovations in addition
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