Hello everyone,
The excavation for a pool is currently underway. The pool will be built with 17.5cm (7 inches) formwork blocks. One long side and one short side of the pool are buried up to the top edge in the ground, while the other two walls extend about two-thirds above the ground.
I will not pour a full concrete slab but will pour the base slab inside the pool later once the walls are in place.
Do I need to create a reinforced concrete foundation with rebar and rebar connections on top of my gravel bed for the exterior walls and then set the blocks on that, or would it be sufficient to set the first row of formwork blocks directly on the gravel bed in concrete and then reinforce the blocks accordingly?
Is there a structural difference in this case between having a foundation or not? I assume it should hold against the pressure, but what is the difference between having a foundation to build on or setting the first block row directly in concrete?
Thanks for your answers.
The excavation for a pool is currently underway. The pool will be built with 17.5cm (7 inches) formwork blocks. One long side and one short side of the pool are buried up to the top edge in the ground, while the other two walls extend about two-thirds above the ground.
I will not pour a full concrete slab but will pour the base slab inside the pool later once the walls are in place.
Do I need to create a reinforced concrete foundation with rebar and rebar connections on top of my gravel bed for the exterior walls and then set the blocks on that, or would it be sufficient to set the first row of formwork blocks directly on the gravel bed in concrete and then reinforce the blocks accordingly?
Is there a structural difference in this case between having a foundation or not? I assume it should hold against the pressure, but what is the difference between having a foundation to build on or setting the first block row directly in concrete?
Thanks for your answers.
It would be a shame if everything ended up being wasted because of mistakes made during construction. After all, it has already cost quite a bit of money, and demolishing everything again would certainly be time-consuming and expensive. I would recommend doing thorough research beforehand and only then getting started. Are you also handling all the plumbing yourself? I would suggest adding a floor drain as well; it helps to circulate and filter the water effectively and also allows water to drain under the jets during winter.
Best regards,
Sabine
Best regards,
Sabine
G
Gartenfreund27 May 2020 02:59I don’t quite understand why you want to pour the floor separately afterwards.
In the end, it doesn’t really make a difference in terms of work whether you first build a foundation for the wall and then create the floor later, or if you do both at the same time.
I would prefer the latter.
When we poured our pond (about 10 m³ (350 cubic feet)), we cast the floor and walls (slightly higher than the maximum water level will be) in one piece.
In the end, it doesn’t really make a difference in terms of work whether you first build a foundation for the wall and then create the floor later, or if you do both at the same time.
I would prefer the latter.
When we poured our pond (about 10 m³ (350 cubic feet)), we cast the floor and walls (slightly higher than the maximum water level will be) in one piece.
I did some more research yesterday and also spoke to my foundation contractor... We are now installing a continuous concrete slab with proper reinforcement. Everything else seems too uncertain regarding the slab’s fracture behavior. I would have to lay it as a floating slab, but if I ever decide to replace the vapor barrier with a different membrane, that would be problematic.
I am now preparing the gravel base and formwork for a 20cm (8 inches) thick concrete slab.
Pouring it all in one go would be ideal, but that requires heavy-duty formwork like in civil engineering, which significantly increases the costs.
I am now preparing the gravel base and formwork for a 20cm (8 inches) thick concrete slab.
Pouring it all in one go would be ideal, but that requires heavy-duty formwork like in civil engineering, which significantly increases the costs.