H-pile to pile cap attachment
H-pile to pile cap attachment
(OP)
I am looking for clever ways to attach a steel H-pile to the concrete pile cap...considering uplift.
I know of the steel plate welded to the top, but I have overthought that and am not comfortable with a potential cavity under the plate.
I have used a "V" shaped rebar threaded through a hole in the top of the pile and extending vertically into the cap, but there was some difficulty during construction. The bar was tough to deal with around the bottom mat of bars and sequencing with the formwork and bottom mat placement was also painful.
Does anyone have any ways to have a positive connection between the steel pile and the pile cap?
Thanks in advance.
I know of the steel plate welded to the top, but I have overthought that and am not comfortable with a potential cavity under the plate.
I have used a "V" shaped rebar threaded through a hole in the top of the pile and extending vertically into the cap, but there was some difficulty during construction. The bar was tough to deal with around the bottom mat of bars and sequencing with the formwork and bottom mat placement was also painful.
Does anyone have any ways to have a positive connection between the steel pile and the pile cap?
Thanks in advance.






RE: H-pile to pile cap attachment
RE: H-pile to pile cap attachment
RE: H-pile to pile cap attachment
This seemed to work well, and was easy for the guys to work around on site.
RE: H-pile to pile cap attachment
I don't like welding rebar. I actually have never allowed it because it is so brittle.
Here you go:
1) Conceptially flip your pile so it looks like a column.
2) Calculate what size headed anchor bolts you would need to develop the tension. Try to stay with A307/A36
3) Determine the depth of concrete you need to develop. (You might need to go with plate washers on the bolts to develop the tension.)
4) Weld A36 threaded bars meeting your design to the four corners of the outside flanges using a flare bevel weld. You'll need to calculate your length of weld.
5) Tack weld the nuts on. (double nut it if the plate washers if needed)
That should take care of it. I'm sure there are other ways, but this is my preference. If you only need two bolts, locate them at the centerline of each flange (along the web).
Chip
RE: H-pile to pile cap attachment
I like the ideas of having a connection that looks like a concrete pile connection (vertical dowels). I tried to stay away from welding the "dowels" but your responses show its really not that big of a deal.
THANKS.
RE: H-pile to pile cap attachment
Welding of reinforcement is okay as long as you specify it done to the approriate procedure
ANSI/AWS D1.4/D1.4M:2005 covers this.
As long as it is done correctly then it is no more brittle than any other welded connection.
Regards
csd
RE: H-pile to pile cap attachment
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