03 January 2021 3 9K Report

The Poisson's ratio of soil is quite difficult for us geo-engineers to obtain. I came across a problem when I tried to determine the parameters in a FEM model.

For the saturated clay in undrained condition, the poisson's ratio is seen as 0.45-0.50. But when analysising the field vibration induced by traffic transmit, the soil is simplified as a linear elastic body. So we could calculate it with K0, which is usually given in the investigation report. The calculating result is usually smaller than 0.45.

I think different poisson's ratio would have an impact on the strains in lateral directions. Was there any person knowing the effect or studying on this? Thanks a lot.

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