Whats is the Correlation between Atterberg Limits and Friction Angles
Whats is the Correlation between Atterberg Limits and Friction Angles
(OP)
Guy i want to now how i can get the soil properties from Atterberg Limits. I have some triaxial testing done but the results are a bit strange so want to know how do can i compare them with Atterberg Limits??





RE: Whats is the Correlation between Atterberg Limits and Friction Angles
f-d
¡papá gordo ain't no madre flaca!
RE: Whats is the Correlation between Atterberg Limits and Friction Angles
RE: Whats is the Correlation between Atterberg Limits and Friction Angles
RE: Whats is the Correlation between Atterberg Limits and Friction Angles
Thanks
RE: Whats is the Correlation between Atterberg Limits and Friction Angles
You can certainly use unconfined compression tests or unconsolidated undrained consolidation tests to evaluate undrained shear strength, but owing to rapid loading conditions and pore pressures, you'll get no real sense on the friction angle. You'll just get undrained shear strength.
What sort of project are you working on?
f-d
¡papá gordo ain't no madre flaca!
RE: Whats is the Correlation between Atterberg Limits and Friction Angles
Peak drained
Fully softened drained
Residual
Undrained, NC to lightly OC
Undrained, heavily OC
Partially saturated, construction stability of fill
Partially saturated, construction stability of cut
Partially saturated, long-term stability
RE: Whats is the Correlation between Atterberg Limits and Friction Angles
RE: Whats is the Correlation between Atterberg Limits and Friction Angles
RE: Whats is the Correlation between Atterberg Limits and Friction Angles
Sinφ'=0.35-0.1lnIp
It is corresponding to the peak value.
RE: Whats is the Correlation between Atterberg Limits and Friction Angles
So i am just trying to get a Effective Friction angle for long term stability.
I have got the lab retesting the samples as single stage tests rather than Multistage as i had got some weird results so lets.
I am trying to get the correlation from PI as well just in-case the triaxials still give a weird answer. hence why i asked this question.
By the way has any body got Kenny 1974. See Fig 4 in attachment that is what i am looking can not located it anywhere
RE: Whats is the Correlation between Atterberg Limits and Friction Angles
RE: Whats is the Correlation between Atterberg Limits and Friction Angles
f-d
¡papá gordo ain't no madre flaca!
RE: Whats is the Correlation between Atterberg Limits and Friction Angles
RE: Whats is the Correlation between Atterberg Limits and Friction Angles
RE: Whats is the Correlation between Atterberg Limits and Friction Angles
www.PeirceEngineering.com
RE: Whats is the Correlation between Atterberg Limits and Friction Angles
When analysing slopes, c' is critical, and no reliance on lab data should be made. Use 0. You would need to look at residual Phi for failed slope. Back analysis as previously mentioned is fundamental. If you can get a block sample of the shear plane, stick it in a shear box!
RE: Whats is the Correlation between Atterberg Limits and Friction Angles
That's the best way to go, even if you're damn sure, get it verified so it's not your a** on the line. I have an uncle who works with a really busy rock crusher operation and he's constantly challenging the engineers with what he knows works, and almost every time they can back him up or make a slight change, but he never does anything without getting a second opinion because in his line of work assumptions gets very expensive.
..unless it's something you can afford to be wrong about? ;)
I've read the FM, and it still didn't work.