Quote:
Originally Posted by TimT
Not sure how closely the water table level matches the tides...
But that pool looks only 3-4 feet deep... Not sure if there is a deep end
Say the tide and water table elevation match inch for inch, the still would be only be a small amount of horizontal pressure on the walls......
Then there is buoyancy... you could float that pool right out of the ground..
The contactor should partially fill the pool to make horizontal pressure and bouyancy close to zero...
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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.