the remodeling contractor said they will open the pressure release valves- but the pool has history of floating and they said they cannot guarantee it will not float again.
how long it takes for an empty pool to pop out due to water pressure?
- Thread starter archer636
- Start date
one corner is ~2 inches high. I was told many years ago they drained the pool and it moved, damaging the bottom drain
If ground water is present then the pool already has hydrostatic pressure on it. As soon as the pool water level is reduced to a point where the hydrostatic pressure underneath the pool exceeds the weight of the pool and water in it, the pool can lift.
If yours has already lifted then it is not a good idea to do more than a partial drain. If you do need to completely drain the pool then you will need to arrange to also have the ground water removed continuously until the pool is once again full.
If yours has already lifted then it is not a good idea to do more than a partial drain. If you do need to completely drain the pool then you will need to arrange to also have the ground water removed continuously until the pool is once again full.
How do you remove ground water? is it not enough to open the pressure valve to allow ground water to enter the pool, before draining?
Not necessarily. I've seen where pumps are hooked up and run continuously to remove the water/pressure.
What is your contractor saying and is there an insurance provision in the event the pool does rise?
What is your contractor saying and is there an insurance provision in the event the pool does rise?
They said they will remove plugs- and IF additional de-watering is needed, that would be in addition to the quoted price. They put a provision in the contract specifically that they will not be held responsible for structural damage in event of pool floating.
Is the remodeler planning on digging some well points around the pool to use to drain ground water?
You're in FL, I would imagine the ground water is quite high, so you have a serious risk if you drain it entirely.
Yippee
You're in FL, I would imagine the ground water is quite high, so you have a serious risk if you drain it entirely.
Yippee
All the above information is correct. If the pool has already floated once, I'd definitely have a couple of dry wells bored/dug to the depth of the bottom of the pool and have sump pumps installed and continuously running as long as the water was out of the pool. You'll need to be concerned where the discharge from the pumps go, but that shouldn't be a big issue. Your storm drains might even handle it.
It's probably a good idea to have float switches on the sump pumps in case there's not enough water to keep them running constantly.
It's probably a good idea to have float switches on the sump pumps in case there's not enough water to keep them running constantly.
thanks. I think I will shelf the project until I have more money to do the dewatering
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