×
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

CPTU dissipation test

CPTU dissipation test

CPTU dissipation test

(OP)
CPTU dissipation test is a good way to evaluate Ch(coeff. of horizontal direction consolidation)  value.
But i think(almost everybody may agree..)it is also hard to interprete because often it is hard to reach 50% dissipation .
o.k anyway i want to know in the eqns of Houlsby and Teh(1988) i.e, T* = (c_h*t)/[r^2* sqrt(Ir)]
"r" value is radius of cone and is 35.7mm that is written in "CPT in Geotechnical Practice " (by T. Lunne and P.K Robertson and J.J.M Powell)
But, cone's Diameter is 35,7mm not radius..
Is it a mis printing or my misunderstood ?
Let me know~
And Teh(1987)'s another eqns that is
c_h = (m/M)^2*sqrt(Ir)*r^2
In that eqns "r" is 35.7mm or 35.7/2 mm ???
Let me know~

Thank u~

RE: CPTU dissipation test

r in the Houlsby and Teh equations is definitely the radius of a standard sized cone i.e. 35.7/2 mm.

Chris Golightly
Senior Geotechnical Engineer
Thales Geosolutions

Dr. Chris Golightly
Senior Geotechnical Engineer
Thales Geosolutions SA/NV
Brussels
Belgium
www.thales-geosolutions.com

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