RCC Pile design 1

[Akhilkp]

Hi All,

i am just learning how to design a Pile and pile cap for a RC column . Can anyone explain how the column moments and shears are transferred to ground through the pile group. And what are the governing load combination for the design ?.

Kindly suggest some useful reference ( Quick ones )

Thanks

Akhil

 

[KootK]

Can anyone explain how the column moments and shears are transferred to ground through the pile group

See the sketch below Akhilkp. Each pile in the sketch represents an out of plane row of piles. There are a lot of permutations of the concept depending on the assumptions made but the basic idea is the same. The shear is generally assumed to be resisted the piles uniformly and via lateral soil pressure near the top of the piles. The axial loads in the piles can be determined using a point support version of P/A + M/Sx or P/A + M/Zx if the cap can be assumed to be rigid.

And what are the governing load combination for the design ?.

All of the load cases listed in the building code that applies to your project's jurisdiction should be considered.

Kindly suggest some useful reference ( Quick ones )

Tomlinson: Link
Bowles: Link
CRSI Handbook: Link

These are not "quick" references but you may be able to get by reading select chapters etc.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.