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Minimum Pile Spacing Before Group Effect on Lateral Capacity

Minimum Pile Spacing Before Group Effect on Lateral Capacity

Minimum Pile Spacing Before Group Effect on Lateral Capacity

(OP)
What are you geotechs using for the minimum pile spacing before group effect needs to be considered for lateral load capacity for drilled shaft groups? I have seen 6D.

For Auger Cast Pile groups? (may be less due to the auger providing lateral support??)

RE: Minimum Pile Spacing Before Group Effect on Lateral Capacity

I think the latest AASHTO code uses 5D as the limit.

RE: Minimum Pile Spacing Before Group Effect on Lateral Capacity

Poulos and Davis have a good discussion on this in "Pile Foundation Analysis and Design".

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