Hi there Mdragger88
Appreciate the help.
Yes, the pavers are on compacted and/ or undisturbed clay with some very minor % of sand.
Concrete paver tops we believe to be very near level with same elevation as the pool sand bottom.
This sand was placed on carefully leveled and compacted clay bottom.
A layer of weed barrier was placed on top of the 1st 1.5 " of sand. Another 1" or so of sand was placed on top of the weed barrier and gain leveled.
All concrete pavers were very carefully leveled and positioned with a level to each leg to the mid point of each paver. During pool filling (both times) each leg was checked and adjusted a minimum of 4 -5 times for vertical, until to much water pressure was to great to adjust.
On the 2nd filling after only 3/4 filling, the next day we noticed many of the legs had migrated in and outward direction. We decided to drain the pool again until a solution is found. Some of the legs had little to no migration.
Level of water is within 1/8" - 1/4" over the entire length of the pool.
The clay under the pavers was very firmly compacted and in some cases was undisturbed. Each paver in turn was level front to back and side to side within 1/16" tolerance.
So we don't understand how this is happening. Again any help is welcomed. We are still looking at the steel cable idea with a turn buckle to adjust just so.
Also I can attach more pictures if needed.
Thank you,
Tim L.