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

Landifill Cover Stability

Landifill Cover Stability

Landifill Cover Stability

Typically, landfill slopes for closure are recommended not to be steeper than 3:1 with an earth liner consisting of an intermediate cover 0.15m, clay type soils with conductivity of 10e-5 cm/s or less and top soil.  Besides global stability considerations, infinite plane stability is of concern.  Have you seen steeper landfill slopes with this configuration before?

RE: Landifill Cover Stability

For any landfill slope lining system once you get steeper than a 1v:3h gradient, then the possibility that the system will fail is great - there are also practical aspects of associated with slope gradients and what type of waste id contained in the landfill itself.

Generally, landfill covers I have worked with have always been 1:7.5 to 1:10 in gradient, to enable effective earthwork activities and installation of gas collection systems.   

RE: Landifill Cover Stability

I am working on one that is quite steep.  It is an existing, closed landfill and I am not quite sure what the actual slopes are, however from a stormwater / erosion standpoint it is extremely unstable. I am working on a drainage repair project to reconstruct / repair / enhance some of the brow ditches and downdrains which have problems with siltation, overtopping and extreme amounts of erosion.  Maximum 10H:1V slopes would be a huge improvement!

RE: Landifill Cover Stability

3H:1V is typical and I'm not sure steeper would work considering interface shear.  Include in your design "let-down" ditches for surface water also.


¡papá gordo ain’t no madre flaca!

RE: Landifill Cover Stability

I've seen portions of old landfills that were greater than 3:1, but they had to be regraded to 3:1 or less per regulation prior to capping. Landfill slopes greater than 3:1 can be a long term maintenance problem.  

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