Oval Above Ground Pool Brace Problem
I had an 18' X 40' oval installed late last summer. About a week or 2 after being filled and ready to go, we noticed along the sides where the supports are a 2"X4" sized protrusion pushing up from under the liner from the side to a bout 2 to 3 feet out then it stopped.
Since then, the installer has had us drain it twice now to try and remedy this. The only thing that I have seen them do is pack more sand on top. I'm no engineer, but physics tells me that the pressure at the top of the pool is pushing the top of the support out and thus that bottom part connected to it up (Imagine an "L" shaped side brace).
Any thoughts before I toss the pool on the truck and go get my money back?
The protrusion sounds like the channel the brace assembly is connected to. If I am understanding correctly, the water fills up, the top of the brace pushes out which would automatically raise the channel on the inside of the pool. If that's the case there are two things that should be preventing this from happening.
There should be a concrete block under the channel on the outside of the pool. This block is supposed to keep the upright from pushing out as the pool fills. If the block is set with the upright straight up and down it should stay that way, if it moves as the pool fills something is wrong.
The other force in play that keeps your uprights straight are the pressure plates on the inside of the pool. Steel plates should be covering these channels. They run parallel with the wall and cover the brace channels. These plates capture the weight of the water and keep the channels firmly in the ground.
If these pressure plates are properly installed and a block were left out from behind the brace the upright would still lean, but you would be seeing the pressure plate rise inside the pool, a much different shape than the shape of the channel you are describing.
Covering the exposed metal is obviously not taking care of the problem. These brace assemblies should not move at all as the pool fills.