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Estimation of Pre-Consolidation Pressure

Estimation of Pre-Consolidation Pressure

Estimation of Pre-Consolidation Pressure

(OP)
All,

I am doing some settlement analysis and trying to calculate the preconsolidation pressure (to check if the soil is over consolidated). I found typical pre-consolidation margin values in Coduto's book, however unable to get some kind of formulas to estimate it.

I came through google and unable to find the empirical co-relation between preconsolidation pressure with other soil parameters. But, unable to do so. If you guys have any idea, can you please share it?

Thank you in advance.

RE: Estimation of Pre-Consolidation Pressure

(OP)
Thank you so much.

RE: Estimation of Pre-Consolidation Pressure

Thanks for the refresh of that chart, Oldestguy. Had forgotten it was there. the NAVAC manuals are a great resource.

Another way to estimate the preconsolidation pressure if you have a handle on your undrained shear strength is to use the relationship, effective O/B pressure = Undrained shear strength divided by 0.22 to 0.25 . . . many use 0.23 (see Terzaghi, Peck and Mesri. Knowing the this effective O/B pressure and your existing effective O/B pressure, you can determine the overconsolidation ratio.

RE: Estimation of Pre-Consolidation Pressure

BigHarvey - no problem in French . . . I have a colleague here working on the dam with me who is from Quebec . . .!

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