×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

A Deformation-Based Slope Failure Criterion

A Deformation-Based Slope Failure Criterion

A Deformation-Based Slope Failure Criterion

(OP)
I am doing deformation analyses and trying to adopt a criterion for my slope failure based on the deformation amount. Is any one of you aware of an allawable value of the deformation of the slope that is given by a code or guidance/recommendation of specific practice.
Thanks

RE: A Deformation-Based Slope Failure Criterion

There is no one answer to your question, for example:

I have a slope in the middle of a farm field, it moves 6-inches per year, I don't have a problem.

OR

I have a slope with a 3 story parking garage on spread footings at the crest.  It moves 1/4 inch per day for a week, I have a very big problem.  

All depends on what the slope is doing and what is in the area.  By the way the parking garage example is real, just not my garage, :).

RE: A Deformation-Based Slope Failure Criterion

What you are trying to do is not determine a "factor of safety" which by definition is based on shear (strength) parameters, but determine a servicability limit.  As GeoPaveTraffic says, what level of movement you can permit will be based on the permissible movement limits of your slope with respect to itself, or to buildings on top, or pipelines within, etc. What you would do it show plots of movements (at selected) locations given the site geometry, soil stratigraphy/parameters, groundwater level, etc. - like a senstivity analysis.  Then you can select the geometry (i.e., slope angle, need for berms, etc.) based on your project needs.

RE: A Deformation-Based Slope Failure Criterion

I guess I'd just add, what is the nature of the movement?  If you have a temporal condition that brings about a few inches of movement, that could be a sign that the safety fractor trended toward unity.  Next time if that temporal condition develops you may not be so lucky (i.e., catastrophic failure).  Then again, newly-constructed slopes can also realize movement owing to compression or consolidation related to vertical stress (v. shear stress).

Just something else to ponder. . . .

f-d

¡papá gordo ain’t no madre flaca!

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


Resources

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