Use of single pile under a pile cap 9

[NewbieInSE]

Dear Engineers,

Is it prohibited in any code (ACI, ASCE, IBC, UBC) regarding the use of a single pile under a column if the support condition is considered a pin? Or is this matter discussed anywhere?

Note: Assume that, it is required to use pile foundation than shallow foundation due to some reasons.

 

[dik]

It's been 20 years since I've done a seismic project... I'm not into them... I do not know why a single pile cannot be used... a double pile could be tricky and should not be an issue, except for high seismic areas. The slab itself can provide restraint of some sort.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[Enhineyero]

However, I was looking for others reviews as the seniors here said that a single pile or two piles cannot be used for a column(in any seismically active area)..
Minimum three piles should be used with a pile cap for any column as per them

This, I think, is a matter of professional preference rather than a hard rule that codes imposed (like using a minimum of 2 bolts for any horizontal member or specifying 12mm thick base plates as a minimum). For seismic areas, the limitation is dependent on type of lateral force resisting system (i.e. SMRF, Ductile shear walls) as far as I know not one of them limits the no. of piles in a pile cap.

 

[dik]

I don't see the need for it... there is little to be gained.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik