Micropile installation "near" and "sufficient time"
Micropile installation "near" and "sufficient time"
(OP)
Hello
I see in ibc 2012 1810.4.10 says 4. Subsequent micropiles shall not be drilled near elements that have been grouted until the grout has had sufficient time to harden.
I take that to mean that if you drill and grout a micropile, you can't drill another one nearby and within some time. Is there any more specific
Thank you
I see in ibc 2012 1810.4.10 says 4. Subsequent micropiles shall not be drilled near elements that have been grouted until the grout has had sufficient time to harden.
I take that to mean that if you drill and grout a micropile, you can't drill another one nearby and within some time. Is there any more specific
guidance for this?
Thank you





RE: Micropile installation "near" and "sufficient time"
To be honest my first thought was that it would be dependent on the spacing between piles (or would it be an issue at all if you were rotary?). Whats the reason for the delay in grouting until the first micropile grout would be cured....that drilling of the next micropile might somehow effect the dia of the 1st one. Surely this would be dependent on spacing...
RE: Micropile installation "near" and "sufficient time"
RE: Micropile installation "near" and "sufficient time"
Radius of influence depends on pressure and the ground stiffness. More pressure and/or soft soil = more cavity expansion, more fracturing, and more communication.
Many times, you cannot "keep an eye on it" because you don't have xray vision for deep piles. Nor does the contractor.
The code writers added something to the code(although ambiguous) because older versions of model specs from DFI and others were silent on this subject.
5 feet on center is a good place to start. Every other pile in a day is common.
RE: Micropile installation "near" and "sufficient time"
RE: Micropile installation "near" and "sufficient time"
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