×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

Multilayer Soil Model

Multilayer Soil Model

Multilayer Soil Model

(OP)
During analyzing soil resistivity values, the utility had the following criterion:

"For soils with resistivity value less than 500Ohm-meter, if the difference between the highest and the lowest readings are within 30 % then the soil can be considered as uniform soil. For soils with resistivity value greater than 500 Ohm-meter, if the difference between the highest and the lowest readings are within 20 % then the soil can be considered as uniform soil."

I couldn't locate any reference recommendation to that, any ideas?

RE: Multilayer Soil Model

SES www.sestech.com has published many papers on grounding. Perhaps they or someone else has done a parametric analysis showing that a uniform soil analysis provides acceptable or conservative step- and touch-voltage values if the stated criteria are met. I haven't seen one.

RE: Multilayer Soil Model

Is it an additionnal request of your client ?
In most of the earthing ground calculation software you just have to fill table with your resistivity measures following depth and it automatically indicate if you are in one or several layers.

RE: Multilayer Soil Model

(OP)
@karls2 no it is not, it is just to know to what extent we can have accurate design with a uniform soil model.

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!


Resources