A
AusDave
Well-known member
Pool saga
A while ago a friend approached me about removing a fiberglass inground pool approx 6.5m long, 3.2m wide and 1.5m deep and fill in the hole. Never one to say no, I said yes, no problem, how hard could it be?
Well I did know the pool was located in a courtyard with no access for any of my machines but I thought I could be clever and float the pool out of the ground and then get a large crane in to lift it over the garage and onto my truck. First I had to make sure the pool was free from a minor restraint, the edge of the pool was embedded in concrete
I had a friend who has been a pool installer and we decided to cut the concrete away from the lip of the pool to free it up and then pump water around the pool and let physics do the rest. The pool had been previously drained by myself but the wet weather had put a few hundred gallons back in it. When it was drained I had screwed down the hydrostatic relief valve which lets water in from the outside to prevent the pool floating up.
So after some cutting and whacking with a sledge hammer we started pumping the water from in the pool down the inspection port outside the pool which would take the water down and around the pool and buoyancy would ensue, we hoped. It was all going well it seemed until it wasn't. The water which was under the pool was suddenly back in the pool and no floating had occurred
We took the hose to a drain and pumped to water elsewhere to see what had happened at the bottom of the pool. As you can see in the first photo below, the curved line to the left of the pool centre was a split which had happened when the pressure from under the pool became to much for the fiberglass to handle and it failed 
Bugger, what to do now. It appeared the pool was stuck fast and would need some alternative hydraulic force to shift it free from its concrete embrace. As the second picture shows, a home made spreader beam and old hydraulic jack was taken to the site and a chain was put around the beam through a spa hole in the pool and jacking commenced at one corner of the pool. There was a lot of jack pumping, and whacking the pool edge gently with a sledge hammer and some crowbarring. The more I pumped the more the chain tore through the fiberglass and it seemed only a few millimetres was gained. But as I couldn't think of anything better to do, I persisted until
I'd moved the pool about 10 to 15mm vertically at that corner. Thinking i may have a chance I moved to the next corner with more jacking, hammering and barring. Got a bit quicker response here and went to the next corner at the far end of the pool. This went went even better and with a bit more barring and hammering the final corner came free as well without the jack

So the pool was now free from the clutches of the concrete and ready for craning out. However first I have to do a Development Application to describe the pool removal and obtain approval from the local Council. Then I'll advertise the pool and see if I can find a buyer before I lift it out so it can be delivered without taking up space at my place. So the saga has a way to go yet but the hardest part I think has been done.
The pool hole will have to be filled and that will be a fair job on its own getting fill to the hole, but I have a few ideas so we'll see how that pans out in a future update.
A while ago a friend approached me about removing a fiberglass inground pool approx 6.5m long, 3.2m wide and 1.5m deep and fill in the hole. Never one to say no, I said yes, no problem, how hard could it be?
Well I did know the pool was located in a courtyard with no access for any of my machines but I thought I could be clever and float the pool out of the ground and then get a large crane in to lift it over the garage and onto my truck. First I had to make sure the pool was free from a minor restraint, the edge of the pool was embedded in concrete
I had a friend who has been a pool installer and we decided to cut the concrete away from the lip of the pool to free it up and then pump water around the pool and let physics do the rest. The pool had been previously drained by myself but the wet weather had put a few hundred gallons back in it. When it was drained I had screwed down the hydrostatic relief valve which lets water in from the outside to prevent the pool floating up.
So after some cutting and whacking with a sledge hammer we started pumping the water from in the pool down the inspection port outside the pool which would take the water down and around the pool and buoyancy would ensue, we hoped. It was all going well it seemed until it wasn't. The water which was under the pool was suddenly back in the pool and no floating had occurred
Bugger, what to do now. It appeared the pool was stuck fast and would need some alternative hydraulic force to shift it free from its concrete embrace. As the second picture shows, a home made spreader beam and old hydraulic jack was taken to the site and a chain was put around the beam through a spa hole in the pool and jacking commenced at one corner of the pool. There was a lot of jack pumping, and whacking the pool edge gently with a sledge hammer and some crowbarring. The more I pumped the more the chain tore through the fiberglass and it seemed only a few millimetres was gained. But as I couldn't think of anything better to do, I persisted until
I'd moved the pool about 10 to 15mm vertically at that corner. Thinking i may have a chance I moved to the next corner with more jacking, hammering and barring. Got a bit quicker response here and went to the next corner at the far end of the pool. This went went even better and with a bit more barring and hammering the final corner came free as well without the jack
So the pool was now free from the clutches of the concrete and ready for craning out. However first I have to do a Development Application to describe the pool removal and obtain approval from the local Council. Then I'll advertise the pool and see if I can find a buyer before I lift it out so it can be delivered without taking up space at my place. So the saga has a way to go yet but the hardest part I think has been done.
The pool hole will have to be filled and that will be a fair job on its own getting fill to the hole, but I have a few ideas so we'll see how that pans out in a future update.