No. I mean that gravity also applies to the neighbor's soil. It will never move only onto your property, but always also downward. In the process, it presses on the horizontal L-leg (or here the outriggers). The connection of this/these with the horizontal leg in turn strengthens it and "holds" it.
Ah ok! But that also means this L-piece should sit as deep as possible in the ground, not directly under the surface, right?
But that’s the beauty of physics: it works reliably even if you don’t understand it (or don’t have to wait to be understood). It acts immediately.
The part of the wall with the garden doesn’t worry me. From the part of the wall with the garage above, I might expect several centimeters of wall tilt per decade, and only if the ground on the neighbor’s side starts to slip. As long as no heavy rain undermines the garage, I don’t see that happening. Of course without guarantee, but also without fear.
Good to know, thank you very much! In this respect, it’s also good that the wall on my side has now been worked on and "straightened" with the demolition hammer. The construction company shouldn’t really have any more concerns about removing soil here, right? I’m only quite worried about frost.
If you’re still stuck on the concept of the L-stone, look into the way wave breakers work at concerts. Same principle.
Or the L-shaped metal bookend. That immediately makes clear on which side the books to be supported belong
The penny has dropped at the mention of the bookend, thanks for that!
But also there: the bookend only works because the L-piece is at the very bottom, right? At the neighbor’s place, the outriggers start about 20cm below the top edge of the lawn and remain significantly above my ground level at the lowest point.
Thank you all very much for putting so much effort into this! Unfortunately, we are very unsettled here because of the statements from the construction company...