ᐅ Plot with a change in ground level – boundary wall between neighbors – foundation?
Created on: 10 Jul 2017 19:20
D
DReffects
Hello!
I hope this is roughly the correct section for my question; if not, please feel free to move it.
Situation:
The neighbor’s plot is significantly higher than mine, and their garage was built just 20cm (8 inches) from the property line. Since the development plan actually requires that there be no sudden changes in ground level, the neighbor should have compensated for the height difference with a slope at about 45°. My garden level means there would be a roughly 1.5m (5 feet) wide slope here—of course, at the expense of their plot. So, we agreed that instead of the slope (and demolishing part of the garage...), the neighbor must build a retaining wall on the property line, which also ensures that drainage happens where it’s supposed to.
We have not yet set the final ground level on our side; we plan to lower it by about 70cm (28 inches). Now, the neighbor has dug a trench along the property line, poured concrete into it, and is building a wall on this foundation using hollow blocks that they also plan to fill with concrete later.
If I remove about 70cm (28 inches) of soil on my side, this will expose all but 30cm (12 inches) of their foundation. From my point of view, 30cm (12 inches) is not enough to support a roughly 1.8m (6 feet) high wall along with the adjacent garage and garden.
The neighbor disagrees. Therefore, my question: is there an online calculator somewhere that can determine the required foundation depth? I would rather not have the neighbor’s wall collapse on my children in a year... My construction company has also expressed concerns and does not want to carry out any further earthworks until the wall issue is resolved.
Thank you
I hope this is roughly the correct section for my question; if not, please feel free to move it.
Situation:
The neighbor’s plot is significantly higher than mine, and their garage was built just 20cm (8 inches) from the property line. Since the development plan actually requires that there be no sudden changes in ground level, the neighbor should have compensated for the height difference with a slope at about 45°. My garden level means there would be a roughly 1.5m (5 feet) wide slope here—of course, at the expense of their plot. So, we agreed that instead of the slope (and demolishing part of the garage...), the neighbor must build a retaining wall on the property line, which also ensures that drainage happens where it’s supposed to.
We have not yet set the final ground level on our side; we plan to lower it by about 70cm (28 inches). Now, the neighbor has dug a trench along the property line, poured concrete into it, and is building a wall on this foundation using hollow blocks that they also plan to fill with concrete later.
If I remove about 70cm (28 inches) of soil on my side, this will expose all but 30cm (12 inches) of their foundation. From my point of view, 30cm (12 inches) is not enough to support a roughly 1.8m (6 feet) high wall along with the adjacent garage and garden.
The neighbor disagrees. Therefore, my question: is there an online calculator somewhere that can determine the required foundation depth? I would rather not have the neighbor’s wall collapse on my children in a year... My construction company has also expressed concerns and does not want to carry out any further earthworks until the wall issue is resolved.
Thank you
H
HilfeHilfe11 Jul 2017 16:45TALK and express your CONCERNS. Maybe the penny will drop for the string puppet as well.
The neighbor has meanwhile dug a trench on my property side and started leveling the protruding concrete using a chisel, hammer, and angle grinder. He excavated about one meter (3 feet) and, as far as I could see, fully exposed the foundation. Unfortunately, repeated concerns raised were ignored.
On his side, at about half the height of the wall, he has prepared four sort of "cantilever" sections of the wall with hollow-core blocks and reinforcement under the future garden level, which he plans to fill later for stability. However, I fear that this might not have much effect against the ground pressure, right?
On his side, at about half the height of the wall, he has prepared four sort of "cantilever" sections of the wall with hollow-core blocks and reinforcement under the future garden level, which he plans to fill later for stability. However, I fear that this might not have much effect against the ground pressure, right?
DReffects schrieb:
On his site, at about halfway up the wall, he prepared four semi-cantilevered sections of the wall below the future garden level using hollow core blocks and reinforcement, which he plans to fill later for stability. Um, could you sketch that again, maybe also from a top-down view?
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
G
Gartenfreund14 Jul 2017 07:1211ant schrieb:
Um, could you please sketch that again, maybe also as a top view?Or upload some photos.
Reading this,
DReffects schrieb:
If I remove the roughly 70cm (28 inches) of soil buildup on my side, I would expose all but 30cm (12 inches) of the foundation.Ultimately, this means that once the soil heap is gone and you properly dig the garden there with a spade, you are already undermining the foundation, and I seriously doubt that this contributes to the stability of the wall.
Gartenfreund schrieb:
Ultimately, when the pile of earth is removed and you properly dig the garden with a spade, you’re already undermining the foundation, and I seriously doubt that this contributes to the stability of the wall. You probably have good reason to doubt that; even a loose pile of excavated soil at its thickest point might only provide about 2° frost protection for the foundation, which certainly does not qualify as solid coverage.
But let’s wait for some pictures.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
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