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





Hi, i need to calculate primary consolidation settlement for a 100 meters NC clay (GS=2,71 Ysat =1,75 ton/m3), with no soil above, and a very granular soil beneath the clay strata.

The surcharge is 0,25 kg/cm2.

I also need to calculate the time for 50% and 90% of consolidation.

Im attaching the e vs log(sigma) and the deformation vs time graphs from consolidation test of a 7,78 cm height test tube. Please help!

Should i divide the 100 m strata in 20 pieces of 5 m strata?
How should i consider the drainage? Just below or also above?

Could you calculate the values so i can compare with mines.


RE: Consolidation

This sounds like a university homework problem. I would suggest that you check out some of the classic textbooks on the subject (Tomlinson, Condutu)

RE: Consolidation

exactly my reaction BigH

RE: Consolidation

publish your solution (showing your work) and we'll let you know what we think. . .


ípapß gordo ainÆt no madre flaca!

RE: Consolidation

with the assumption gwl in the surface, the consolidation settlement is ranging between 200-300mm. How much yours?

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!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close