Plot with terrain drop - separating wall neighbors - foundation?

So, what he's walling up towards himself there really looks like an anchor. In the ground. Just think about it.....

So, what he’s bricking towards himself there looks like an anchor. In the ground. Just think about it.....

That’s exactly the point I don’t understand. It was explained to me as if the earth is constantly pushing from right to left. So I would have to brace myself on the left on the ground to counteract the pressure from right to left. What’s the use of connecting myself more firmly with the part of the earth that’s pushing to the left? As I was explained it, I perceive the anchors on his side like if, to stop a rolling car, you lie on the windshield instead of putting a wheel chock in front of the wheels.

Uh, don't get me wrong - but these L-shaped stones are on his side. How are they supposed to absorb the earth pressure towards my side? Or am I misunderstanding something?

The L belongs on the pressing side, so on his side.

whereas the L-piece, due to the approximately 45° incident terrain pressure, would have to be below our lawn for a supporting effect to occur here.

No, that would be the wrong reference. It already looks correct like this.

How is the whole thing to be assessed in terms of frost protection and drainage?

How necessary which kind of drainage would be here, I’ll keep quiet about that because I have no idea. I had already advised to backfill with insulation on your side of the wall.

That's exactly the point I don't understand It was explained to me as if the Earth is constantly pushing from right to left. So I would have to brace myself on the left on the ground to counteract the pressure from right to left.

There could be a causal connection between not understanding and a stupid explanation
The L-shaped block principle works with the stiffness of the angle in the L. The pressure from above on the horizontal L-leg acts (like water displacement on a ship) in such a way that you can practically subtract it from the pressure on the horizontal leg. Its long (and stepped) extensions accomplish this even better than the ready-made L-block model.

Translated to your picture: the L applies axle load / pressing force on the braked axle.

The L belongs on the pressing side, so on his side.
No, that would be the wrong reference point. It already looks correct that way.

There could be a causal connection between not understanding and a stupid explanation
The L-stone principle works with the stiffness of the angle in the L. The pressure from above on the horizontal L-leg acts (like water displacement on a ship) in such a way that you can practically subtract it from the pressure on the horizontal leg. Its long (and stepped) branches even manage this better than the ready-made L-stone model.

Translated to your picture: the L transmits axle load / pressing force to the braked axle.

Ok, exciting! Thanks for the info. I hardly understand anything but that at least sounds better than before.
Do you mean it like this, that the greater density of the wall with its cantilevers (its “weight”) increases the downward pressure so much that the moving soil presses against and locks onto the immovable part of the ground?

I was explained the opposite by the site manager and a construction-accompanying engineer. He drew me the following sketch:


However, of course it is also quite possible that I just didn’t get it. My field is unfortunately somewhere completely else... Of course, I would now prefer that it is correct this way. You can change the appearance of the whole thing. My construction company just told me that they will not come closer than one meter to the wall with earthworks because they fear the stuff will fall over.

That was, however, before the anchors. The inspection with the site manager is on Tuesday!

Do you mean that the greater density of the wall with its outriggers (its "weight") increases the pressure downward so much that the moving soil presses against and locks onto the immobile part of the ground?

No. I mean that gravity also applies to the neighbor’s soil. It will never move only onto your property, but always also downwards. In doing so, it presses on the horizontal L-leg (or here the outriggers). Their connection with the horizontal leg in turn strengthens it and "holds" it.

The site manager and an engineer working alongside the construction explained it differently to me. He drew me the following sketch:

I know the phenomenon that, with a "four" in physics, the opposite can initially (and possibly even significantly longer) seem more convincing - including for myself. The engineer’s explanation is what one calls "pseudo-logical." In fact, in an experiment set up that way, the horizontal L-leg would only be loaded on the weaker side, which is less than equivalent and does not contribute to "victory." The L-stones would be pushed crookedly and upwards.

But that is the beauty of physics: it works reliably even if you do not understand it (or do not wait for it to be understood). It works immediately.

My construction company just told me that they will not approach the wall with earthworks closer than one meter because they fear the stuff will fall over

The wall part with the garden does not worry me. From the wall part with the garage above, I possibly expect several centimeters of wall tilt per decade, and even that only if the terrain on the neighbor’s side starts to slip. As long as no heavy rain undercuts the garage, I don’t see that happening. Of course without guarantee, but also without fear.