×
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

Design Compression of Soil

Design Compression of Soil

Design Compression of Soil

(OP)
I am working on an engineering design which includes underground piping.

We're having the contractor dig a 4' trench, fill 6" deep sand, then verify it is at a certain compression value.

Then they lay the pipes and surround the pipes with sand and again verify their compression value.

Finally they fill with Native soil to the top of the trench and again verify the compression value.

The goal is to make sure that over time (with rain and walking) the trench wont sink down.

Where can I find out good compression values to use for the sand and soil?

RE: Design Compression of Soil

You should probably look at ASTM D1557, the Modified Proctor test, to get an index value for the testing.
Underground piping outside buildings is usually specified as X% (usually between 90% and 98%) of the theoretical maximum dry density as defined by the Modified Proctor test.
The compaction in the field is typically measured using a nuke gauge, ASTM D2922.
You can get some good practices for buried piping from AWWA M23, which is about the design and construction of buried PVC pipe.
These are all American standards.  There should be similar in European standards.

RE: Design Compression of Soil

(OP)
Thank you so much, I will review the standards you mentioned!

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