Pile design info
Pile design info
(OP)
Hi, I am just wondering how structural engineers use the information from geotechnical engineers for pile foundations. For example, most of the times, I provide axial and lateral capacities without any load information, so I provide pile capacities (axial and lateral) based on single pile analysis. I provide axial capacities for different sizes of piles. Also, along with lateral capacities, I provide the displacement and maximum moments for each specific capacity.
However, most of pile foundations are composed of pile groups so I would like to know how my information based on a single pile is used by structural engineers.
However, most of pile foundations are composed of pile groups so I would like to know how my information based on a single pile is used by structural engineers.






RE: Pile design info
RE: Pile design info
http://www.piledrivers.org/files/db809e6a-2743-46e...
In this link, I found interest what it is indicated in page 25: "The lateral deflection of a pile group is typically 2 to 3 times larger than the deflection of a single pile"... I was thinking the opposite.
Agree that cooperation between structural and geotechnical is needed. However, our investigations are done in the preliminary stage of the project where sometimes few design information is available. Thanks again.
RE: Pile design info
RE: Pile design info
RE: Pile design info
RE: Pile design info
RE: Pile design info
RE: Pile design info
RE: Pile design info
Again, I feel that has a lot to do with pile spacing. There's another thread in this forum where there's a 3 pile group of 8" square piles spaced at 18" o/c. That spacing seems really tight to me.
RE: Pile design info
RE: Pile design info
RE: Pile design info
Dik
RE: Pile design info
RE: Pile design info
For axial point bearing pile loads, 2D spacing may be considered as the absolute minimum spacing under optimum conditions, but not for any lateral loads. For axial friction pile loads even 3D spacing may be too close.
www.SlideRuleEra.net
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RE: Pile design info
Also, as pointed out by oldestguy at the begging of this thread, do you know any equations/formulas that relate single and pile groups that are used for design?
Thanks again!
RE: Pile design info
There are equations for driven pile block efficiency but they do not apply to point bearing piling. The equation I'm familiar with is for driven friction piles. It won't apply for your work with cast-in-place piles, and is not for lateral loads anyway.
www.SlideRuleEra.net
www.VacuumTubeEra.net
RE: Pile design info