Quote:
Originally Posted by drcoastline
This is a barrier island the pool is in the water table, which moves up and down based on tide. Higher during a full moon, storm, etc., lower at other times. That is why there are pumps. as the water seeps into the hole the pumps pump it out.
The walls are not the issue, the floor is the issue especially at this stage where the concrete is still green. If they did not have the pumps running to keep the pressure down the pool would do exactly as you say, it would try and float. The upward pressure would crack the pool floor. When the pool is ready to be filled they will fill it equalizing or exceeding the pressure then remove the pumps.
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Interesting.
Currently have a pool being finished, waiting for plaster this week.
Our builder popped 3-4" holes in the floor at the corners to deal with hydrostatic pressure.
Basically any water will flow into the pool relieving pressure and somewhat equalizing pressure.
Obviously when they plaster they will close the holes first.