Post-Grout Anchor Diameter
Post-Grout Anchor Diameter
(OP)
What is the maximum anchor drill diameter one can post-grout for a tieback anchor? i.e. can you post-grout a 12" diameter drilled hole? What is typically feasible? Any good references?





RE: Post-Grout Anchor Diameter
What are the soil conditions/loads/number of strands? 12 inch diameter seems large. If these are going to be cased holes, casing over, say, 5 to 6 inches in diameter becomes much more difficult for the drillers to handle and load. This translates into more expensive tiebacks.
RE: Post-Grout Anchor Diameter
Erdbau is right - 12" is huge for a tieback drill hole. I would be concerned about the grouting pressures required to crack a grout column that large.
I second his questions - what design loads are you trying to achieve and what are the subsurface conditions like?
RE: Post-Grout Anchor Diameter
Wedlmic
RE: Post-Grout Anchor Diameter