Greetings,
I was wondering what is the optimal way to connect the reinforcement at the top of the pile (the part that connects to the raft foundation):
-The pile bars are left straight and connected to the raft?
-Or the bars are bent in 45 degrees and then connected to the raft?
Because I've seen both cases
Both types are acceptable.
In case of rigid connections ensure that sufficient length of pile reinforcement is embedded inside raft to delelop the required resistance.
In case of hinged connections, again ensure that proper detailing is used to validate these assumptionsi.
Both alternatives are correct provided that sufficient development length is satisfied. Usually the bars are bent in case pile head is demolished.
If the pile is subjected to axial compression without any pull, both alternatives are okay. However, if the pile is subjected to pull, the second alternative ( the bars are bent in 45 degrees ) is better.
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