Topsoil on compacted RC material for road?

Hello everyone,

I have a rear property where we moved in July. Our path (belongs to the property) from the street in front is 4.5m wide, and after about 30 m the actual property begins. The path was compacted with RC material for the construction machines and a crane during the construction phase.

I had a walkway (6cm curbstones on the left and right and paving stones in the middle) made on the right side of the path towards the back.

On the left side of the path, I now also want to lay a row of curbstones. Between this curbstone and the inner curbstone of the walkway there would then be an approximately 3.2m wide driveway for the car.

There is still a good 40 cm of space up to the top edge of the curbstones. Since I still have a lot of topsoil from the excavation, I was thinking of spreading it on the driveway and then putting some more RC on top and compacting everything again.

That should work, right? Because underneath the topsoil is already compacted and the curbstones are concreted in on the left and right of the driveway. So despite the topsoil, the ground or the later grid stones should not settle.

What do you think? Can I safely get rid of some excess topsoil here?

Best regards

What do you think? Can I safely get rid of some excess topsoil here?

I wouldn't do that. I assume that ruts will appear very quickly.

Although beneath the , say 20cm topsoil layer, the compacted RC material is already present? I would also compact the topsoil as much as possible with a compactor and place another 10cm of RC on the topsoil, which will also be compacted again. Would the topsoil still pose the risk of settling?

Topsoil is unsuitable. There will be ruts. I also assume drainage problems in the topsoil layer. In short: I would not do it.

Topsoil cannot be compacted, it will sink and become uneven and crooked, continue filling with RC and put 8cm paving on top, with the construction road underneath it can hold 10 t, so forever

OK thanks for the answers