×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• 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.

# Questions about Bearing Capacity formula

## Questions about Bearing Capacity formula

(OP)
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.

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:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!