×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Minimal Pipe Cover during Construction - Floating of Pipe

Minimal Pipe Cover during Construction - Floating of Pipe

Minimal Pipe Cover during Construction - Floating of Pipe

(OP)
I'm working on a project where we are installing an 8' diamater drainage pipe in an area that has a after-rain high water table.

Is there a rule of thumb on how much cover should be placed on the pipe to keep it from floating out of the ground?  The concern is that it will be empty and the bouyance of the saturated soil around it will cause it to float.

Thanks in advance.

RE: Minimal Pipe Cover during Construction - Floating of Pipe

For a pipe this large it may be necessary to install concrete anchors to prevent flotation.  For an 8 foot pipe you can calculate the bouyant force if the water table is at the top of the pipe as 0.785D^2*(62.4 lb/ft)= 3135 lb/ft of length, roughly.  You'll probably want to add a safety factor of 1.5 to any calculation you do just to be sure.

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



News


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