Large Auger Cast Piles
Large Auger Cast Piles
(OP)
I am reviewing a project with 60 foot long 24 inch Auger Cast Piles. I hsve two concerns. One is that the 24 inch size seems larger than the standard 12, 16 or 18 inch. The other concern is that the design requires a 30 ft. long cage to be lowered into the cast pile. Will that work? Won't the grout be setting up at some point between the surface and 30 ft and prevent lowering the cage?





RE: Large Auger Cast Piles
If they are fast, they could possibly pull it off. Any consideration to using vibratory insertion of the cage?
RE: Large Auger Cast Piles
Don't place the cage afterwards, place the cage first and then use a Tremie to place the concrete.
HTH
Michael
RE: Large Auger Cast Piles
There were two contractors on the job. Berkel seemed to be able to do it pretty easily, although there were a couple piles that had to be abandoned. The other contractor had problems, I believe due to the experience of the crew. Many of the cages had to be pushed down with a backhoe. There was much argument, and eventually it was decided that if the cage could be placed by hand to within 5 feet, the last 5 feet could be pushed down with a backhoe.
Ron, you may remember this job, so please correct me if my memory is bad.
RE: Large Auger Cast Piles
RE: Large Auger Cast Piles
RE: Large Auger Cast Piles
RE: Large Auger Cast Piles
GEOTECHNICAL ENGINEERING CIRCULAR NO. 8
Design and Construction of Continuous Flight Auger (CFA) Piles
The bentonite and polymer is a suggestion if you don't want to worry about set time of concrete. CFA, cast-in-place shaft, pretty much the same thing with better shaft dimensional control/support. Usually CFA is best for poor soil conditions....but is becoming more popular.
RE: Large Auger Cast Piles
RE: Large Auger Cast Piles
RE: Large Auger Cast Piles
As for cage insertion, its all about the types of soils and the time it takes to get the cage in the ground. I too have seen the pound it down with the backhoe routine, don't really like it, but likely not to cause a problem either.
RE: Large Auger Cast Piles
24 inch pile is a big pile - Why not go with drilled in pier or driven pipe?
RE: Large Auger Cast Piles
RE: Large Auger Cast Piles
RE: Large Auger Cast Piles
due to vibration of the hammer while pulling the casing , it ends with different sizes from the cuttoff .
the error is -4 to +2
any suggestions please ?
the client wanted an assurance of future settlement ?
RE: Large Auger Cast Piles
Start a new post - don't piggyback on an old one.
Jeff
RE: Large Auger Cast Piles
I have used longer and smaller diameter piles on a recent contiguous pile project with no problems.
RE: Large Auger Cast Piles