So looking at your illustration....the areas to the left and right of original round pools location are undisturbed soil. Will you have to dig those areas out some? And there are two sections of the new pools walls that will cross over the backfilled area, right? So maybe 25% of your pool walls will cross over fill, and that will occur in the straight sections of your wall. So the majority of the backfilled area will be in the pool (within the walls). So worst that happens there is you end up with a funky sunken circle in your pool which would suck to clean, and might damaged your liner as it sinks. Right?
That is correct. Portions of the the walls and liver will be on undisturbed ground and those areas. Everything is pretty level, so I will only need to dig out for the base blocks.
So i guess i don't understand, how much weight (force) is transferred to the ground at the wall? Vs. say the middle of the pool?
The engineer I work with would need more info to figure that out also. Soil tests for sure.
You haven't detailed how exactly the fill got back there and how exactly you filled it...
30+ yards of riversand was dumped on the side of the hole. Me and my wife tried to shovel/wheelbarrow most of it till a friend showed up with a bobcat loader. We had shoveled in about 8-10yrds by hand. When the bocat showed up, he pushed in the rest, running over it after every push. That 1st 30 yrds sat for a week, then I had 20+ more added on top of that.
Perhaps you could dig back out where the pool wall will go, properly fill that area or pour concrete, and then just hope for the best in the middle of the pool....