Shaft Coring Method
Shaft Coring Method
(OP)
OK experts.
What is the preferred method for cutting a vertical full depth core from an existing drilled shaft foundation?
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What is the preferred method for cutting a vertical full depth core from an existing drilled shaft foundation?
(cue Syncopated Clock)





RE: Shaft Coring Method
RE: Shaft Coring Method
RE: Shaft Coring Method
RE: Shaft Coring Method
We collected 4, 5-ft long cores using a 2-inch id double wall core barrel.
The resulting cores look just awful. Numerous horizontal separations, discoloration, and I can abrade the surface with my fingernail.
Makes me think 'bad tremie job.'
Any thoughts?
RE: Shaft Coring Method
RE: Shaft Coring Method
By the way.......who was in charge of the pile supervision during the project........was a geotech firm hired to perform pile monitoring......if not........hmmmm....now there was a bad move......and if there was.....well the supervising firm better had tonnes of paperwork covering themselves.
Remember......engineers do on a dime.......what fools do on a dollar.
RE: Shaft Coring Method
That said, the resulting breaks ranged from 5000 to 7500 psi.
The remaining core sections were fractured horizontally at an interval of 2 inches to 1/4 inch...
FYI, the top ten feet of the shaft had failed NDT and had to be rebuilt in September '08. The shaft repair was about 3 months old when we cored it.
And dirtguy4, the contractor 'overlooked' the inspection requirement, because it was a repair job(!) :0
Could be third time's the charm.
RE: Shaft Coring Method