Midwest US. There used to be mines under this area: coal and later fire-brick.
Find a nice flat spot today, come back in a day or a week and there's a
Private sidewalk on the side of a hill. One section (36 x 56 ") slowly
settled all a-kilter, one corner 2" above grade, the opposite corner
2" below. I paid a contractor $50 to bust it up, haul away. He wanted
another $250 to replace it: I knew what he'd do, decided to do it
The proper level of the sidewalk is the same as grade. In the hole left
by the removed concrete, it's about 2" to grade on the upside, about
6" on the downside.
The contractor would have framed, poured and leveled gravel, then
poured and finished. Over time, the same problem would have developed.
This is approach #1.
Approach #2 would be to dig and level the dirt in the hole, then
maybe gravel and pour/finish. Over time, same problem.
Approach #3, which I'm considering, would be to use a fence-post
digger to dig several piers/footings, just like for a fence-post, and
concrete with a re-rod up to about 2.5" under grade. Then some
gravel and 3-3.5" of concrete, cold-bonded with the piers.
This "project" is a severe PITA for poor me. My back (and some
other parts) is killing me, and I've broken out in some kind of
hot-weather rash that torments the mortal s**
* out of me, day-in,
If anybody's got constructive suggestions, other ideas, or ???,
it would be much appreciated.