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If an in-ground concrete pool lifted several inches out of the ground and has cracked from the skirt is it repairable?
Wiki User
∙ 16y ago
Presumably it floated up whilst empty due to ground water underneath it. I'm building a pool at the moment so have thought a bit about flotation - we are having a submerged ground water pump (a small electric pump that turns on and off automatically with its own float switch) lowered down a pipe just outside one corner of the pool to avoid any ground water problems - it will pump water up and away to a drain. Our pool walls are packed with gravel at the bottom so any ground water can percolate around to a sump where the pump is.
Not knowing your situation and how bad the cracking is, I would suggest:
(1) get the pool as far back down as possible by lowering the water table locally using a submersible pump (dig a hole down beside it that will fill with water when you hit the water table).
then
(2) you don't say whether it is tiled or has a liner.
If the cracking is not too bad (pool held together by steel reinforcing bars in the walls) you can probably put a liner in it and hope it doesn't happen again. If it hasn't gone back down the bottom may crack and slump down - some pools have 12" concrete underneath, others have just a couple of inches of screed or even a liner laid on a layer of sand - you will need to judge whether it is smooth enough.
If you want to make a better job, dig down around it, pressure-wash off any mud and cast a new concrete wall section, with steel reinforcement mesh, across the cracks and/or around cracked corners. Then cast a new concrete ring beam, with reinforcement, all around the top, a little below ground level. [we are having a beam 65cm wide by 20cm deep for a 12*6m pool, with 8 steel bars (4 inside, 4 outside) around the deep end, 2+2 for shallow end]. - you can scale beam width in proportion to length of pool and depth in proportion to depth, as a rough guide.
Pack the repaired sections and ring beam back firmly against the ground with roadstone (small hard core).
If it was tiled you could retile the cracked bits, or try sealing the cracks with silicone (not a nice solution). We are having a liner so we never have to worry about tile cracks!
Allow the concrete to set for several weeks before refilling.
Good luck
Roger
Wiki User
∙ 16y ago
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