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Changes in shear waver velocity with compaction

Changes in shear waver velocity with compaction

Changes in shear waver velocity with compaction

Recently, I've had a few projects where I have gotten (upon request) shear wave velocity test results for some sites. But that brings up a question in my mind: could that significantly change upon the normal site prep? The site (as it stands) is a industrial plant, lacking only some compaction work before pouring foundations.

Running some numbers (finding equations correlating relative density, void ratio, dynamic shear modulus, and shear wave velocity), I'm not seeing big changes even with some serious compaction. But then again, I wonder how accurate the equations I am using are (especially the one correlating void ratio to dynamic shear modulus).

So in anyone's experience, how much have you seen the shear wave velocity value vary with the relative density within the same soil type? Generally, I've typically seen the wave velocity change only when going from one type of soil strata to another.

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