U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000


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Bridge Construction

Continuous Flight Auger Piles

CFA piles (or auger cast-in-place (ACIP) piles, as they are commonly known in the United States) are a deep - foundation element characterized by drilling a hollow - stem auger into the ground to form the pile's diameter. Sand-cement grout or concrete is pumped into the hole as the auger is removed, eliminating the need for temporary casing or slurry. After the auger is removed, reinforcement is installed.

Continuous Flight Auger Piles
Continuous Flight Auger Piles

DC Benning Road Bridge
DC Benning Road Bridge

University of Maryland
University of Maryland

Updated: 08/20/2013
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000