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

Why the surface pass the foundation pile in slope stability

Why the surface pass the foundation pile in slope stability

Why the surface pass the foundation pile in slope stability

Dear all
I'm modelling a slope in rocscience slide6 slope stability.
I'm Set a width 1m concrete wall in the model to simulation foundation pile
but Why the surface will pass the foundation pile and the safety factor will increase?


RE: Why the surface pass the foundation pile in slope stability

Modelling a pile in slide which improves your safety factor is a fallacy. The first big problem is 2D v 3D. Are you modelling the pile as a soil element and having high (few thousand?) cohesion value?

All this will do is force the failure plan to extend below your pile tip.

In short, limit equilibrium stability programs are not a good way to model retaining walls. Soil nail anchors, etc yes, embedded retaining walls no IMO.

RE: Why the surface pass the foundation pile in slope stability

Agree with EireChch 2D slope stability programs are not a good way to look at piles. They are good at modelling uniform slopes, where the represntative section is at least 4 times the height of the slope. At lower ratios 3d effects offer significant resistance.

To respond to why the FOS increased you want to look at the graph which shows you the shear resistance for each slice along the failure plane with and without the pile for the exact same slip surface.

RE: Why the surface pass the foundation pile in slope stability

I agree with what has been said above.

In addition if you need/want to model a pile in a 2D software program, my suggestion is to model the pile as a reinforcing load acting perpendicular to the slide plane. Determining the appropriate load is difficult, but can be done using other software programs such as LPile.

Mike Lambert

RE: Why the surface pass the foundation pile in slope stability

Thank you for your professional answers
I will try other analysis software for slope and pile modeling

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


eBook - Integrating the Engineering Ecosystem
Aras Innovator provides multiple options for integrating data between systems, depending on the scenario. Utilizing the right approach to meet specific business requirements is vital. These needs range from authoring tools, federating data from various and dissimilar databases, and triggering processes and workflows. Download Now
Research Report - Simulation-Driven Design for SOLIDWORKS Users
In this engineering.com research report, we discuss the rising role of simulation and the paradigm shift commonly called the democratization of simulation. In particular, we focus on how SOLIDWORKS users can take advantage of simulation-driven design through two analysis tools: SOLIDWORKS Simulation and 3DEXPERIENCE WORKS. Download Now
White Paper - Industry 4.0 and the Future of Engineering Education
With industries becoming more automated, more tech-driven and more complex, engineers need to keep their skills and knowledge up to date in order to stay on top of this wave—and to be prepared for the Industry 4.0 future. The University of Cincinnati offers two online Master of Engineering degree programs designed specifically for practicing engineers. Download Now
eBook - The Design Gridlock Manifesto
In this eBook, you’ll learn 6 ways old CAD technology slows your company down and hear how design teams have put those problems to rest. “The Design Gridlock Manifesto” shares first-hand modern CAD experiences from 15 companies around the world. 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