phamENG
Structural
- Feb 6, 2015
- 7,550
I'm trying to expand my horizons a little (and remember a few things from college that have fallen by the wayside with time), so hopefully you guys can help me.
Say I have a report from a triaxial test run on a normally consolidated clay sample. The report shows results for 3 identical test specimens with varied cell pressures resulting in varied normal stresses. Plots for shear vs. normal stresses (3 semi-Mohr's circles) and deviator stress vs. axial strain are provided.
I want to determine the undrained shear strength of this clay. As I recall, it varies linearly with depth (normal stress). So would I be correct in taking the deviator stress/2 for each and plotting that against depth to approximate the shear strength at any depth within that clay layer? Or am I way off my rocker? Thanks.
And before anyone says it, don't worry - not trying to do the geotech's job. I just want to be more familiar with the source of the data behind the numbers I have to use in structural design.
Say I have a report from a triaxial test run on a normally consolidated clay sample. The report shows results for 3 identical test specimens with varied cell pressures resulting in varied normal stresses. Plots for shear vs. normal stresses (3 semi-Mohr's circles) and deviator stress vs. axial strain are provided.
I want to determine the undrained shear strength of this clay. As I recall, it varies linearly with depth (normal stress). So would I be correct in taking the deviator stress/2 for each and plotting that against depth to approximate the shear strength at any depth within that clay layer? Or am I way off my rocker? Thanks.
And before anyone says it, don't worry - not trying to do the geotech's job. I just want to be more familiar with the source of the data behind the numbers I have to use in structural design.