ᐅ Constructing a Cost-Effective Retaining Wall / Slope Stabilization
Created on: 27 Feb 2019 13:50
A
abc12345
Hello everyone,
The weather is steadily improving, so it’s time to start planning the outdoor area. Parts of the property will need to be filled in. The site has already been surveyed, and leveling at the lowest point would require approximately 2 meters (6.5 feet) of fill soil.
There are gardens adjacent to the property on all sides, so I will need to build a retaining wall accordingly.
I have already spoken with the local building materials supplier. He suggested simply making a foundation by excavating 1 meter (3.3 feet) deep, then adding a 20 cm (8 inches) layer of crushed stone, followed by 80 cm (31.5 inches) of reinforced concrete. On top, concrete blocks would be placed, reinforced with rebar and filled with concrete. He recommended using blocks sized 26 cm or 29 cm (10 or 11.5 inches), but said he could not provide structural calculations or any official advice. He quoted me a material cost of about 3,500 euros.
Nothing was mentioned about installing drainage. I’m also unsure where the water would be directed since all sides border neighboring properties. Or did I misunderstand the purpose of drainage—is it to carry water away from the retaining wall to somewhere else?
Now my question is whether there might be other, possibly more cost-effective ways to do this? Precast L-shaped concrete elements are available here, but they cost about three times as much and require a mini-excavator for installation.
Another option I considered is to reduce the wall height to 1 meter (3.3 feet) and create a steep slope up to the fill level. However, I’m not sure how steep the slope can be without causing sliding. The property will later be enclosed with a dense hedge for privacy. As far as I understand, the wall must be set back 2 meters (6.5 feet) from the property boundary to avoid problems with height restrictions, especially because the ground has already been raised by 2 meters (6.5 feet).
I want to minimize the amount of space lost to make the most of the property, but I also want to keep costs relatively low since there are many other projects planned.
Since I can’t see the wall from my side and the neighbor is a daycare center, appearance is not a major concern for me.
Maybe you have some ideas or tips on the best way to approach this.
Thank you in advance for your help.
The weather is steadily improving, so it’s time to start planning the outdoor area. Parts of the property will need to be filled in. The site has already been surveyed, and leveling at the lowest point would require approximately 2 meters (6.5 feet) of fill soil.
There are gardens adjacent to the property on all sides, so I will need to build a retaining wall accordingly.
I have already spoken with the local building materials supplier. He suggested simply making a foundation by excavating 1 meter (3.3 feet) deep, then adding a 20 cm (8 inches) layer of crushed stone, followed by 80 cm (31.5 inches) of reinforced concrete. On top, concrete blocks would be placed, reinforced with rebar and filled with concrete. He recommended using blocks sized 26 cm or 29 cm (10 or 11.5 inches), but said he could not provide structural calculations or any official advice. He quoted me a material cost of about 3,500 euros.
Nothing was mentioned about installing drainage. I’m also unsure where the water would be directed since all sides border neighboring properties. Or did I misunderstand the purpose of drainage—is it to carry water away from the retaining wall to somewhere else?
Now my question is whether there might be other, possibly more cost-effective ways to do this? Precast L-shaped concrete elements are available here, but they cost about three times as much and require a mini-excavator for installation.
Another option I considered is to reduce the wall height to 1 meter (3.3 feet) and create a steep slope up to the fill level. However, I’m not sure how steep the slope can be without causing sliding. The property will later be enclosed with a dense hedge for privacy. As far as I understand, the wall must be set back 2 meters (6.5 feet) from the property boundary to avoid problems with height restrictions, especially because the ground has already been raised by 2 meters (6.5 feet).
I want to minimize the amount of space lost to make the most of the property, but I also want to keep costs relatively low since there are many other projects planned.
Since I can’t see the wall from my side and the neighbor is a daycare center, appearance is not a major concern for me.
Maybe you have some ideas or tips on the best way to approach this.
Thank you in advance for your help.
C
Caspar20207 Mar 2019 19:5511ant schrieb:
For a wall that is supported on one side and free-standing on the other, is "vertical" recommended???Yes. Essentially, with 36.5 concrete formwork blocks and the reinforcement that needs to be integrated, L-shaped elements are effectively cast on site.
Without reinforcement, the maximum height is significantly lower (see the value in the picture).
Funny. The manufacturer only distinguishes the backfill based on whether it is subject to traffic load or not, regardless of its viscosity.
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Caspar2020 schrieb:However, I don’t quite understand how you see the reinforcement basically creating L-shaped blocks.
Because basically, with 36.5 formwork blocks and the reinforcement that has to be incorporated, L-shaped elements are basically cast on site.
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@11ant
Since these are fir trees, pruning looks very poor. The firs only block the distant view, and because they are not dense at the bottom, they do not provide any privacy either. Therefore, they should be removed, and taller shrubs should be planted to create privacy.
If I were to keep the trees and only raise the level of the land, I would end up with a much steeper slope towards the back without proper reinforcement next to the neighbor’s property.
Since these are fir trees, pruning looks very poor. The firs only block the distant view, and because they are not dense at the bottom, they do not provide any privacy either. Therefore, they should be removed, and taller shrubs should be planted to create privacy.
If I were to keep the trees and only raise the level of the land, I would end up with a much steeper slope towards the back without proper reinforcement next to the neighbor’s property.
Webmaster-uk schrieb:
If I were to keep the trees and just level the land, I would not add fill in the building setback area in front of the privacy screen, but rather keep the natural terrain as it is.
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11ant schrieb:
I would not add any fill in the building gap before the privacy screen but leave the natural terrain as it is.I don’t understand what you mean.
Winniefred8 Mar 2019 13:32I would also consider whether an underplanting of fir trees might be sufficient for lower-level privacy screening. How important is the distant view to you?
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