Contact US

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!

*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

Shallow Footings Bearing Capacity

Shallow Footings Bearing Capacity

Shallow Footings Bearing Capacity

When calculating bearing capacity for shallow footings, in the various formulae (including Terzaghis) do I use drained or undrained parameters? For context, most of these calculations are done for clay. Most engineers are using undrained shear strength (and phi=0) to calculate bearing capacity, but shouldn't we calculate drained conditions as well using just friction angle?

RE: Shallow Footings Bearing Capacity

Rather than me giving the answer away, what I think you should do is calculate bearing capacities for a range of common footing sizes and embedment's in your area of practice, with undrained and drained parameters of clay of varying undrained and drained strength, and you may come to understand the answer that way.

RE: Shallow Footings Bearing Capacity

and I have. always end up with drained parameters giving approximately half of what undrained parameters would give. Which leads me to ask if I am being overly conservative using drained parameters? or if it's shallow footings in clay, undrained parameters will suffice as drained conditions won't realize?

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! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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