Piled Raft
Piled Raft
(OP)
Hello
Please excuse my ignorance on the subject.
This is the first time I am designing piled rafts. I have a few questions for which I would appreciate some direction/references.
1.How to determine the thickness of piled raft?A expert give me this formula to determine thickness,But I cant realize this formula.
"10 (700*4.448)^0.5 in mm
2.Say a column load is 700 kips,pile can carry 300 kips,how to transfer safely rest 400 kips load by raft?I know there are some calculation,please anyone share with me.
Thank you
Please excuse my ignorance on the subject.
This is the first time I am designing piled rafts. I have a few questions for which I would appreciate some direction/references.
1.How to determine the thickness of piled raft?A expert give me this formula to determine thickness,But I cant realize this formula.
"10 (700*4.448)^0.5 in mm
2.Say a column load is 700 kips,pile can carry 300 kips,how to transfer safely rest 400 kips load by raft?I know there are some calculation,please anyone share with me.
Thank you
RIFAT





RE: Piled Raft
To get a head start, read all of the previous posts on eng-tips on this subject.
Also get publications by Poulos (AU) for a start.
I would suggest a non-linear soil-structure model (like Plaxis or FLAC).
Do not try to size your mat based on a single formula.
RE: Piled Raft
RE: Piled Raft
RE: Piled Raft
If you have a column load higher than what a pile can take you shouldn't put it directly over a pile, rather, put 3 piles around the point load in a triangular pattern so that they share the load.
The others here are on the right track, you'll need to properly model all this stuff.