I took this picture today just for you. The lens on my phone was dirty so the picture is fuzzy.
The walls of this gunite pool are non-consistant in width, as you can see.
They had about 2.5 to 3 inches of mortar under the coping.
This pool had an automatic pool cover, so the coping overhung the edge quite a bit (for the track to mount under the coping).
Not sure how it would look for you, but you may wanna have the coping overhang the edge, similar to the picture. This way the back of the coping is away from the soil and won't heave.
"It's You vs. You"
"People Throw Rocks At Things That Shine"
My Equipment Brag List:
-1 CAT hat
-16 pairs of Hanes socks (the Heavy Duty model), many with holes.
-12 pairs of underwear, ranging from Joe Boxers to Jockey, many are in need of replacement. (no more photo requests please)
-hundreds of t-shirts. Some w/ grease stains, some torn & tattered.
-7 pairs of jeans, ranging from Levis to Polo to GAP. 1/2 of them have holes in 'em.
-1 pair of old worn out Nike shoes.