×
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

Pool Wall

Pool Wall

Pool Wall

(OP)
I am designing an inground pool that is in-ground. One question that I have is would you take the footing below frost depth for this?

RE: Pool Wall

Unless you are in an area where teh frost depth is extremely low, I would think that the footing would be there simply by virtue of the depth of the pool.  What is your frost depth?
I would definitely put the bottom of ftg below it, either way.

RE: Pool Wall

(OP)
The frost depth is 30". I was going to put bottom of footing 30" below top of finished pool floor.

RE: Pool Wall

Assuming the pool is empty in the winter and the frost depth will be measured from the bottom of the pool.  A complete footing down to frost depth under the pool,(not just the walls), will be prohibitively expensive.  Use granular material to break the capillary action of moisture and horizontal insulation under the pool bottom to stop frost penetration.  A good drain system around the perimeter is also recommended.

RE: Pool Wall

I'm with civilperson on this one.  We have had great luck with more or less letting the design of the pool dictate the depth.  The builders we work with wire up the reinforcing, shotcrete the pool and walk away.  We have never seen any issues with pools breaking up during winter even though the pools we design are empty at that time.  Just a good granular cushion underneath for resistance to frost.  And yes, make certain a drain tile system is installed around the pool; you don't want the pool to float, just the people swimming in it.  

RE: Pool Wall

pardon my ignorance, but coming from the southwest, draining a pool is rarely if ever done unless absolutely necessary.  Are in-ground, outside pools in colder climates drained each winter?  If so, wouldn't that tend to increase the frost depth at the bottom of the pool due to the trapping of cold air? (unless the pool was covered and insulated).  It seems like just by keeping some water in the pool may help to keep the bottom of the pool warmer.  I doubt it would ever freeze solid.

RE: Pool Wall

(OP)
In this situation the guy wants to use CMU for the pool. IT will be in the side of a hill, and the bottom end will be exposed, and have a waterfall effect at the edge. My main concern is also settlement in the wall, and it becoming out of  level.

RE: Pool Wall

cvg
Pools left unheated will freeze 8 feet down in Nebraska and similar climes.  This freezing can be destructive in spring when alternate freeze/thaw occurs.  Draining the pools is a Halloween/Labor Day ritual in many locales.

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