Pool deck is sinking...what can I do?




Short of removing deck and reinstalling, what can I do for the 20% of my pool deck that is unsupported? Cement injection? Will this "raise" the deck at the crack back to it's original height?
The pool itself, fortunately, is fine.
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My 12 x 14 ft concrete patio is sinking in the middle towards the house.
Had one, similar wash -out. Just wanted to make sure it did not drop and further. Used scissor jacks and a piece of uni strut across them Dug out a trench to place the jacks ran the unistrut across the top. backfilled with dirt and packed with a long wooden dowel 4 foot in. During the process, I actually raised the deck about 3/4 an inch. Since it had only dropped 1 1/2, i went ahead and jacked up the scissors. Finished packing the dirt and added paving stones around the outside to hold the new dirt in. 1.5 years later, no issues.
I have had "foam" jacking done. It has held up well. Through my research I have heard that mud-jacking can add weight and thus sink again. It was a little less in the way of cost, but less holes to be patched.
Inground pool. Was like this when I moved in. The individual slabs are raised 2 to 5 inches around pool on one side. Soil was built up on this side so it was suggested that I dig it out and jack it up and then support with more concrete. Do you have any other suggestions.
Polyurethane Foam will solve your problem!!! The foam is lightweight but very sturdy. Holes are drilled into the slab wherever a lift is needed. These holes are no bigger than a dime and are easy to seal over. When a slab sinks its most likely because the soil beneath it was not properly packed before setting the concrete. Thus, environmentally the dirt is washed away and leaves a "void" which causes the slab to sink. Polyurethane is durable and can last for a very very long time (years) without needing a touch up. Polyurethane for me was the best way to go and a fast fix.