My name is Tiago, I am from Portugal and this is my first post on this forum. I've been visiting this forum since last year, when I got a pool and followed a lot of advice given here. This is an amazing community!
Today I make my first post because I have found a problem that I don't know how to solve and that, as far as I can see at the moment, it kinda goes against the laws of logic.
I have an Intex Easy Set 15' by 42". My garden is not leveled so we needed to find a way to do it. Both years we choose to put some wood EUR Palletes with the holes covered and top the rest with sand (well compacted). Then, a plastic sheet and the pool was installed on top of everything.
Last year everything went great: the ground was more or less leveled (I think we got a little over the 2.54cm limit, maybe with 3cm but everything was fine.
This year I decided we could do even better. And... I don't know what to conclude. I'll show you some photos and explain everything:
Following last years procedure but improving on the compacting of the sand, this year we left the sand a little bit higher than the rest of the ground. Oh, I should mention that about a quarter of the pool is on top of a cement ground and the other 3/4 is on grass. This would keep everything leveled relative to the cement ground (the high point) because the sand would compact a little bit more with the pool on top of it.
The result, in terms of the ground, is acceptable: the sand is still a little bit higher but nothing to worry about... I think. This means the cement is a little bit lower.
But the problem is that the pool is bulging in a pretty big part of the wall.
Pool - Album on Imgur
In the album in the last link you can see several things:
In the first photo, the part of the wall with less of a bulge, the top of the chair is about 8cm away from the top ring. Then, in other photos keeps getting away to a maximum of around 30cm.
There are several things that I think I should mention:
1- The water is higher in the part where the pool is lower (cement)
2- In the part where the pool is lower (cement), the wall has the smaller bulge (I think this goes against logic... More weight against a wall should make it bulge more, no?)
3- In the measurements I made to see how high the water is, the difference is less than an inch. It is around 2cm (3/4", I think). I am measuring this by putting a straight piece of wood in the water until it touches the ground and measure from the ground to the part where the water mark stops. I do this several times around the pool and the measurement only varies by what I said).
4- In the part where the pool is higher, the water is lower and the wall has a bigger bulge.
Now, in my mind, the wall should have a bigger bulge in the part where the water is higher and this is not what is happening.
What am I doing wrong? How can I correct this? Am I measuring water level correctly?
Thank you all very, very much!