×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Determining axial loading for CU tests

Determining axial loading for CU tests

Determining axial loading for CU tests

(OP)
I apologize for posting such a basic question, but what is the proper way to determine the axial loading for CU triaxial tests?


Thank you

RE: Determining axial loading for CU tests

Do you mean the consolidation stress?

RE: Determining axial loading for CU tests

it typically requires three "tests" to provide one failure envelope (i.e., get a friction angle).  I'd certainly consolidate the sample to the existing overburden pressure. Then the further answer relates more to the anticipate stress path.  If you are designing a cut slope, you'd certainly want to consolidate to a lower stress.  If you are designing for additional loads (i.e., retaining wall or road embankment) you'd want to consolidate to a higher stress.  The third "test" can follow the trend or bracket the existing overburden pressure.

Now the question is, "What defines failure for each 'test'?"  Check the ASTM for further confusion. . .

f-d

¡papá gordo ain't no madre flaca!

RE: Determining axial loading for CU tests

And do remember the preconsolidation stress the sample experienced.It could cause different behaviour for the sample. A obvious overconsolidated sample commonly will show a higher C' and lower Phi' compared to its normal consolidated peer.
Suggest do an oedometer test before carry out any triaxial test.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources