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Vibration next to fresh concrete

Vibration next to fresh concrete

Vibration next to fresh concrete

(OP)
Three separate foundation systems. All are in the same job site and all are delegate design. There are Underpinning, Auger Cast Piles, and concrete driven piles.
We initially had the driven piles go in first, then underpinning, then auger piles.
We had delays and at this point we are going to have to do all three almost at the same time.
Soil on site is soft.
We asked the auger pile concrete when we could drive the concrete pile next to their piles, they answered after one day.
I am not convinced.
I would like to know your thoughts and does anyone have any reference?
Thanks in advance!!

RE: Vibration next to fresh concrete

My answer if asked the same question would be delay the auger casting until the driven piling is complete.

If forced, at 1-2 days the concrete likely will have sufficiently hardened. but I'd still be leery of performing driven piling directly adjacent to newly cast piles.

RE: Vibration next to fresh concrete

(OP)
Thanks all. To be honest, I am surprised. Then why don't we allow compaction (vibration) next to newly casted walls. Are these two different issues?

RE: Vibration next to fresh concrete

Seanan - If you are asking about compaction behind a newly placed retaining wall, IMHO, that is a different issue. A retaining wall is self-supporting and has to resist the soil load plus the compaction loading applied to the backfill. There is nothing to keep an uninformed Contractor from compacting too close to the wall.

A new cast-in-place concrete piling has no load applied and is supported, surrounded, and protected by soil.

www.SlideRuleEra.net idea
www.VacuumTubeEra.net r2d2

RE: Vibration next to fresh concrete

(OP)
SlideRuleEra Thanks a lot. It makes sense.

RE: Vibration next to fresh concrete

Seanan....pretty much everything SRE says makes sense!!

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