Hello,
I am working on a project where we plan to sink a trampoline into a hole in the lawn so that the trampoline is more or less flush with the lawn.
To create the "walls" of the hole, we have built up lecasten. There will be a total of 4 layers of stone (about 80cm), which will then be topped off with some type of paving stone slab. The hope is that the ground pressure will be absorbed as much as possible by the built "circle". The stones are cut so that pressure will press the stones against each other, like the underside of a viaduct. We will also refill around with a lot of larger stones, stacked so they don't put pressure on the wall.
Do you think we will still need some kind of geogrid?
We are also considering issues like frost heave and similar. Do we, for example, need to lay a platon mat or similar before refilling?
Do we need to plaster the inside, or can it be left as it is?
(Yes, I know that there are inground trampolines available for purchase 😉)
I am working on a project where we plan to sink a trampoline into a hole in the lawn so that the trampoline is more or less flush with the lawn.
To create the "walls" of the hole, we have built up lecasten. There will be a total of 4 layers of stone (about 80cm), which will then be topped off with some type of paving stone slab. The hope is that the ground pressure will be absorbed as much as possible by the built "circle". The stones are cut so that pressure will press the stones against each other, like the underside of a viaduct. We will also refill around with a lot of larger stones, stacked so they don't put pressure on the wall.
Do you think we will still need some kind of geogrid?
We are also considering issues like frost heave and similar. Do we, for example, need to lay a platon mat or similar before refilling?
Do we need to plaster the inside, or can it be left as it is?
(Yes, I know that there are inground trampolines available for purchase 😉)
