coefficient of consolidation Cv
coefficient of consolidation Cv
(OP)
Does anyone have an opinion on which way is a better way to obtain the coeifficent of Consolidation? The lab reported the coefficient of consolidation using both Taylor's square root of time fitting method and Casagrande's logarithm of time fitting method. Plugging the two different numbers into my settlement calculations gives me rather large differences in the time rate of settlement.





RE: coefficient of consolidation Cv
RE: coefficient of consolidation Cv
Additionally, Taylor's method tends to work better soils with more silt/sand, i.e. those that drain/consolidate quicker.
RE: coefficient of consolidation Cv
For the root-time method is not always possible to obtain a straight-line portion. In such cases the log time method is more useful.
Both methods should give similar results. So, I suggest checking again your data for possible omissions.
If you have values for the in-situ coefficient of permeability (k), you can estimate the mv from the oedometer and then use the following equation:
Cv= k[in-situ]/(mv[lab] *?w)
RE: coefficient of consolidation Cv
gw=unit weigth of water
RE: coefficient of consolidation Cv
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RE: coefficient of consolidation Cv