Contribution of concrete in pipe pile
Contribution of concrete in pipe pile
(OP)
We are installing open-ended pipe piles to bedrock. After installation the piles will be plugged with concrete. Can the contribution of the concrete be taken into account for pile bearing capacity? How can this be estimated.





RE: Contribution of concrete in pipe pile
Please see FAQ731-376 by VPL for tips on how to make the best use of Eng-Tips Fora.
RE: Contribution of concrete in pipe pile
We are preaugering the piles through mine rock fill and firm to soft clay to andesite bedrock. So far I have not taken the contribution of the plug into account since the piles will be preaugered.
The pipe piles will be filled with concrete after installation. I have not taken the contribution of the concrete into account because of the difficulty involved with cleaning out the pipe and ensuring that the concrete will go all the way through. Also I am not sure if the pipe and concrete will act as a unit.
Appreciate your thoughts on this.
RE: Contribution of concrete in pipe pile
RE: Contribution of concrete in pipe pile
Thanks for the comments. IN that case what do you use for design the yield strength of the steel for the entire area?
RE: Contribution of concrete in pipe pile
Are you concerned about negative skin friction?
Please see FAQ731-376 by VPL for tips on how to make the best use of Eng-Tips Fora.
RE: Contribution of concrete in pipe pile
I would sugest driving the piles with a thicker wall (which since you are driving through rock fill can only help) or drive piles closed end. If you drive closed end you may be able to eliminate augering or at least limit to the upper fill area.