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


Swimming Pool Design

Swimming Pool Design

Swimming Pool Design

I was looking for reference material for the design of a commercial swimming pool.  I have very little experience in this, mostly trying to relate it to cooling tower basin design.  This installation, I believe will be in an area with expansive clays.  My contact mentioned putting the pool on piers.  I guess supporting the pool from piers seems like a tall order, I would expect that would require a lot of piers.  The pool depth will be from 3 to 10' deep.  Any help would be appreciated.

RE: Swimming Pool Design

Design it as a large concrete water-holding tank.  You say it is a commercial swimming pool, so I'd imagine you cannot do it all in one pour.  The trick then becomes how do you make leak-proof construction joints?  I still haven't seen a detail that works, so I'd like to know.

If you put the pool on piles, then you need a pile cap to resist punching shear.  I would then design conc. beams spanning from one pile cap to the next, and then design your pool walls to span between conc. beams.

High strength conc. may also be a good idea.

RE: Swimming Pool Design

I am still having concerns about the load on the "slab" spanning between the piles or the conc beams spanning between the piles.  At the 10' deep end the water pressure on the bottom is 624#/sf.  This is quite high for the piles and the slabs.

RE: Swimming Pool Design

How close can you space the piles?  A 20 ton timber pile gets you about an 8' o.c. spacing.  If you can then span beams between each pile (8' tributary area @ 624+ psf shouldn't be that bad), then your pool "slab" may be designed as a two-way slab.  Also, epoxy coated rebar might be a good idea.

One other thing to check - where's your ground water elevation?  If you have high ground water, and your pool is empty during the early spring months, you must check uplift.

Also, perhaps you may be permitted to use a live load reduction?  I'm not sure what the code says about water as a live load, if anything.  Anyone have any comments on that?

RE: Swimming Pool Design

I guess installing piles 8' on centers may be required depending on the soils report.  Another concern is expansive soils.  Would void forms be a possibility if the entire slab is supported on the piles.  I have used this on larger foudnations, pile caps, etc.  I would expect if the expansive soils were not allowed to expand under the slab, cracking could be a problem.

RE: Swimming Pool Design

best to keep piles at close spacing, thereby less deflection in base slab/ smaller 'crack widths' to contend with.

follow design for watertight consruction.

design steel as simply supported between piles, add 25%, you'll have a stiff section that will deal with any failing if any of the piles settle more than others.

loading uniform - piles/slab should find their equilibrium.

curing important - quality of workmanship etc.

design elements simply supported, e.g tank structure. ease of construction try to use double layers of mesh each face for walls/slabs. L & U bars for connections.

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!


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