ᐅ Site grading and slope stabilization

Created on: 24 Jun 2019 19:26
M
M4rvin
M4rvin24 Jun 2019 19:26
Hello,

We will soon be excavating our plot. We plan to remove about 20cm (8 inches) below street level, which is about 10cm (4 inches) above the finished floor level, and then refill with sand/topsoil. In areas where the driveway, parking spaces, or terrace will be, the excavation will be around 80cm (31 inches).

Along the southern property boundary, we need to build a 60cm (24 inches) retaining wall. (We will be digging 60cm (24 inches) deeper, while the neighbor’s land is likely 40-60cm (16-24 inches) higher.) My first thought was L-shaped concrete blocks, but these would basically need to be embedded into the neighbor’s property. We then thought that gabions might be an option. However, when I search for gabions and retaining walls, it seems quite complex (two sections, stacked at an angle, with frost protection on the earth side).

Is it not possible to simply place the gabions straight on a foundation? It’s only 60cm (24 inches), or does that not make a difference?

Thanks in advance for your advice.

Southwest view: two-story house with terrace, windows, people, and trees.


Northeast view: two-story house, window fronts, tree, people on the right, ground level.


Northwest view of a single-family house with dark roof, entrance, windows, trees, and people.


Southeast view of a modern house with dark roof, glass facade, balcony, terrace, and people.


Parcel plan with plot numbers and red house model
bon198024 Jun 2019 23:39
Why not a nice natural stone wall? With some space on top for blue cushions, rockfoil, and other plants...
M4rvin25 Jun 2019 06:50
It must be really nice!
But probably not inexpensive?
bon198025 Jun 2019 09:05
I think it won’t be more expensive than using L-shaped retaining walls or gabions (as far as I know, neither of these is cheap…). For 7 meters (23 feet) at a height of 60 cm (24 inches), we paid about 3500 € in total.
Z
Zaba12
25 Jun 2019 09:50
In terms of price, from affordable to expensive => natural stones (split/rough) => L-shaped retaining walls (reinforced) => gabions.

But if you excavate deeper and your neighbor raises their level, gabions and natural stones become irrelevant anyway => You should talk to each other and plan this 120cm (47 inches) height difference together.
H
halmi
25 Jun 2019 10:06
I would first suggest talking to the neighbor and looking for a solution together. It should be in both parties' interest to find a reasonable resolution.