Hello all! I am thinking of building my own pool. My design is interesting because I want it to be a semi inground with one end above ground due to my sloping yard. This whole idea came about when I heard of plywood walled pools. I happen to have several large timbers laying around, and it dawned on me I can use them to build a pool. My idea is to put these timbers (treated) in the ground on 4' centers and frame wall sections to be supported by the timbers. I would then skin the wall sections with 3/4" plywood. After that it would be a typical install with a vinyl liner. Here is a pic of my idea:
So, my question is on the structural design of this thing. The pool is going to be a flat bottom with 52" walls. My concern is the exposed end of the pool. In the pic, I did fill about 6" around the bottom to give additional support, but is this enough? The wall sections are 2x4s on edge spaced 16" on center spanning 4' between posts and the 3/4" plywood on the inside. Any thoughts? Any help would be great!