Installation of Auger Cast Piles
Installation of Auger Cast Piles
(OP)
I'm soon going to be observing the installation of auger cast piles for the first time.
Any tips on things to look for when observing?
Any tips on things to look for when observing?





RE: Installation of Auger Cast Piles
Make sure there is sufficient head on the grout to prevent "necking" of the pile.
Compare pumped volume with theoretical pile volume. If different, find out why. If actual < theoretical....necking. If actual > theoretical, low strength stata or lense encountered, or void in soil profile.
Make sure they rebar cage gets to the desired depth and without having to pound it into place.
If tension is consideration, make sure tension bar is pushed straight and to the proper depth.
Check grout strength and flow.
I'm sure I've probably forgotten something, but off the "top of my head" these are critical.
RE: Installation of Auger Cast Piles
Check the placement of the pile before it is poured to make sure it is according to plan.
Make sure the cage steel is of the right size and grade.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Installation of Auger Cast Piles
Centralizing devices are a great addition, if not required by spec, to ensure proper reinforcing steel installation.
RE: Installation of Auger Cast Piles
RE: Installation of Auger Cast Piles
Ron
RE: Installation of Auger Cast Piles
How do you know the volume of each stroke?
I was told that typical overages in my region are 15%-30%.
How do you assure sufficient head?
I should clarify that I am observing, not inspecting.
RE: Installation of Auger Cast Piles
If you know the volume of the grout being pumped at all times and you know the extraction rate of the auger, you can estimate the head on the grout.
As DD noted, the overage will be typical. Be more concerned about undervolume conditions. Over just means you're pumping a little more grout. Under can mean a structural deficiency.
RE: Installation of Auger Cast Piles