×
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

Foundation

Foundation

Foundation

(OP)
We are designing protection concrete one way slab to bridge over existing concrete vault (has cover grating) in a road with heavy traffic. The proposed slab will have foundation that will be close to vault walls, I am planning to recommend installing 2" rigid insulation along vault walls to compensate for frost protection requirement of (4 ft.). Is this approach is ideal or someone could advise otherwise?

RE: Foundation

Studies have been done for insulated foundations in very cold climates (Alaska).  2" of insulation sounds like a done deal to me but I don't have to stand behind the decision.  Anyhow, sounds good.

RE: Foundation

From a thermal viewpoint I think it will mean nothing, since you have not a heat source in the materials. All will come more or less in such cold climate to the same temperature. I understand well it is a slow proces to change the inner temperature of thick parts, but on the average seasonal value will stay mostly. So the main use of anything like that between construction materials and soil is on permitting differential movement between soil and foundations, that is (laterally) benefitial; so a modest level of compressibility shouldn't do harm.

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