×
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.

# Geosynthetic Slope Stability Calculation Help

## Geosynthetic Slope Stability Calculation Help

(OP)
Hello,
I am trying to perform a slope stability calculation for a project using 'Designing with Geosynthetics - R.Koerner'. I have inserted the parameters into a spread sheet, and I am using the worked example in the book to verify my spreadsheet. The problem I have is that I am getting a value of 63.3kN/m for Wp using my spreadsheet, but the worked example shows 65.1kN/m. I have calculated using a calculator but still get 63.3kN/m. I must be doing some part of the calculation in the incorrect order - could somebody shed some light. See linksbelow for my spreadsheet and a pdf of the calculation and equation (Wp is the calc causing me issues). Thanks for any help

Ryan

### RE: Geosynthetic Slope Stability Calculation Help

I think your problem is in your entering of the angles into your formulas. I assume that B4 and B10 are in degrees (16 degrees and 18.43 degrees). If I convert them to radians and revise your equations, I get Wp = 65.0. I did this very quickly so you should check this yourself. See the revised worksheet in the attached Excel file.

### RE: Geosynthetic Slope Stability Calculation Help

See the attached Excel Sheet 1 (3). In previously-sent Sheet 1 (2), I did not change cells B4 and B10 to radians. I changed only the equations by entering ther radians into the equations. See Sheet 1 (3) for changes to B4, B10, and the equations (now referring to cells B4 and B10). I still get 65.0 but get much different answers for some of the other cells compared to your original spreadsheet.

### RE: Geosynthetic Slope Stability Calculation Help

Ryleeha07, Robert Koerner told me that you should contact him and he can help you if you still have a problem. He said, "Ryan has to tell me what edition of DWG he is using and what page or section he is working with....That said, I will respond accordingly"....Bob Koerner
Try him at GMA Tech Line [GMATechLine@ifai.com].

### RE: Geosynthetic Slope Stability Calculation Help

(OP)
Thank you very much for your help and suggestions. I will contact Bob on the GMA tech line as I have a few other additional queries.
Best Regards
Ryan

#### 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.

#### 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
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a partâ€™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:

• 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!