Quick Undrained Shearbox Test
Quick Undrained Shearbox Test
(OP)
As far as I understand a shearbox test is a drained test(assumption that excess pore pressure is 0).
I do however have clients who require "quick undrained" tests on partially saturated soils.
This can surely, at best, be a total stress test?
Any recommendations on how quickly I should shear the samples? But more importantly:
How do you interpret the test data?
I do however have clients who require "quick undrained" tests on partially saturated soils.
This can surely, at best, be a total stress test?
Any recommendations on how quickly I should shear the samples? But more importantly:
How do you interpret the test data?





RE: Quick Undrained Shearbox Test
There are DSS machines that simulate undrained tests by adjusting the normal force to keep the sample at constant volume, but that's for saturated samples where undrained means essentially constant volume. With partially saturated soil, undrained doesn't mean constant volume, because air is so much more compressible than water.
Thought-provoking question, if nothing else. Is this for stability of embankment slopes under construction?