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


Questions about Bearing Capacity formula

Questions about Bearing Capacity formula

Questions about Bearing Capacity formula

I have a couple questions about the Terzaghi-Meyerhof equation for bearing capacity.

(1) This equation has a variable p-sub-q that is an additional surface surcharge. What is the difference between a surface surcharge and a load on the footing? What are some examples of an additional surface surcharge?

(2) Dumb question. Why is a surface surcharge load added to the equation resulting in a higher bearing capacity? I'm trying to understand this conceptually.

Thank you!

RE: Questions about Bearing Capacity formula

You need to remember that these bearing capacity equations are for failure of the soil beneath the footing. The surface surcharge helps resist the movement of soil upperward from beneath the footing. Since that surcharge is resisting the failure, it increases the capacity.

This is the same effect as the increase in the bearing capacity you see when the footing is deeper below the ground surface, assuming everything else is the same.

Mike Lambert

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


White Paper - Smart Manufacturing for Semiconductor
New technologies and approaches present great opportunities for semiconductor manufacturers to achieve high levels of innovation, yield and improvement. This white paper explores some of these cutting-edge technologies and how they can be applied effectively in the semiconductor industry. Read about how Smart Manufacturing is transforming the semiconductor industry. Download Now
White Paper - Analysis and Simulation in Aircraft Structure Certification
Organizations using simulation and analysis tools effectively see the benefits in their ability to achieve certification faster and with drastically less total cost than those who do not maximize these tools. Read this White Paper to learn about how digital tools such as analysis and simulation help in aircraft structure certification. 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