Hi all,
In MC model, the excess PWP calculation is not correct and Cv term is calculated automatically in MC model based on input values Eoed (E and v') and k. Disregard these let's say I'm using MC model for the consolidation analysis without using any advanced soil models, I'm going to find the Cv value from the laboratory test (1-D consolidation test) which is provided in the SI report as shown below.
Here Cv was calculated based on different pressures. Since Cv is almost constant for the soil, my question is => which Cv value I can use for analysis in Plaxis for the consolidation analysis (does it based on the pressure I have used for the consolidation analysis) {If my applied pressure is 50kPa, then I will take the Cv for 50kPa in the laboratory test and apply in the analysis}?
Thanks.
You are confusing two different concepts. I will try to explain below.
Cv values or mv values in consolidation test is a test result. For most soils, it is very nonlinear. This means (as you said) different values for different stress ranges. This is the test data.
Mohr-Coulomb model's stiffness modelling is not nonlinear. It's represented with a single E modulus. So, it is your duty as designer to select which stress range is relevant for your analysis and which cv (or mv) values to be used to calculate E values in your design, if you wish to continue with a simplified model.
There are other methods to come up with a non-linear representation of the model, but be aware that your test results might not be enough to interpret the parameters of these soils.
For a rough and simplified analysis of oedometer test, see here, Eoed chapter: bdem.notion.site/Hardening-Soil-Model-0de9cb85d1184d72933f8521c4348376
Hi Berk,
Thanks for the reply.