knoten0815
2020-10-09 14:36:21
- #1
Hello dear forum community,
I have found a building gap in my area, and the municipality has sent me the soil report to read below. Since I have virtually no experience with suitable building grounds, I thought perhaps someone here could support me with the assessment or maybe has even built on similar ground.
The soil report already points to increased construction costs, but how high could these be given the conditions? Does anyone have any experience?
We are thinking of a rather small single-family house (we don’t yet know if prefabricated or solid construction) with maybe a maximum of 70 sqm of floor space without a basement, a small terrace, and 2 parking spaces.
But what makes me suspicious is that there are 3 large plots, and they have been on the market for about three quarters of a year. Also, on Google Maps it looks as if everything is densely overgrown with trees. I suspect that these plots might not be a good catch; do you agree?
Excerpt from soil report:
Geological layer description
Clay, silty, gravelly
Nodular marl
Residential development of the site is associated with considerable costs, as excavation of the construction pits must take into account slope stability problems. The restless morphology indicates landslides on the slope.
If development is still planned, interested parties must be informed about slope stabilization measures, such as shoring with soldier pile walls or sheet piles. It is recommended to design basement floors as rigid as possible to prevent possible cracks.
Plate foundations are recommended as the foundation element because they best bridge movements in the subsoil.
When founded on stiff foundations, an allowable soil pressure of 180 kN/m2 can be used as a guideline for stiff soil consistency. This guideline assumes a frost-free foundation of approx. 1 m depth. The landslide tendency of the nodular marl can be reduced by draining the entire slope with deep drains in the direction of the slope. Landslides cannot, however, be ruled out. Watercourses can cause deeper layers to move and cause larger slope collapses.
Best regards Knoten
I have found a building gap in my area, and the municipality has sent me the soil report to read below. Since I have virtually no experience with suitable building grounds, I thought perhaps someone here could support me with the assessment or maybe has even built on similar ground.
The soil report already points to increased construction costs, but how high could these be given the conditions? Does anyone have any experience?
We are thinking of a rather small single-family house (we don’t yet know if prefabricated or solid construction) with maybe a maximum of 70 sqm of floor space without a basement, a small terrace, and 2 parking spaces.
But what makes me suspicious is that there are 3 large plots, and they have been on the market for about three quarters of a year. Also, on Google Maps it looks as if everything is densely overgrown with trees. I suspect that these plots might not be a good catch; do you agree?
Excerpt from soil report:
Geological layer description
Clay, silty, gravelly
Nodular marl
Residential development of the site is associated with considerable costs, as excavation of the construction pits must take into account slope stability problems. The restless morphology indicates landslides on the slope.
If development is still planned, interested parties must be informed about slope stabilization measures, such as shoring with soldier pile walls or sheet piles. It is recommended to design basement floors as rigid as possible to prevent possible cracks.
Plate foundations are recommended as the foundation element because they best bridge movements in the subsoil.
When founded on stiff foundations, an allowable soil pressure of 180 kN/m2 can be used as a guideline for stiff soil consistency. This guideline assumes a frost-free foundation of approx. 1 m depth. The landslide tendency of the nodular marl can be reduced by draining the entire slope with deep drains in the direction of the slope. Landslides cannot, however, be ruled out. Watercourses can cause deeper layers to move and cause larger slope collapses.
Best regards Knoten