Proceedings - DFI Specialty Seminar, "Augered Cast-In-Place Piles Seminar- 1997, Orlando, FL", (DFI)
Design of Augered CIP Piles
Prof Michael McVay
The use of augered cast-in-place piles has seen tremendous growth under commercial structures in the past twenty years. Problems with vibration soil densification and/or heave associated with driven piles do not occur with properly installed augered piles. Augered cast-in-place piles were originally constructed (1950ís) with diameters of .31 m (12 in.) and lengths up to 6.1 m (20 ft); however with the advent of better drilling equipment, diameters varying from .41 m (16 in.) to .61 m (24 in.) and typical depths ranging from 18.3 m (60 ft) to 24.4 m (80 ft) are achievable. Reinforcement may vary from a single high strength rebar (Grade 60) at the top of the pile to a continuous steel cage depending on loading (compression, tension-uplift, and lateral). Typical axial design loads (compression) for a single augered cast-in-place pile are in the 445 kN (50 tons) to 890 kN (100 tons) range.
|article #280; publication #29 (ACIP-1997)|