In nature, there are simply no perfectly flat areas of land and for this reason we sometimes have to arrange a foundation on areas with a slope, which can be both small and large.
For this reason, not every type of foundation is suitable for us. Further in the text, we will analyze different suitable foundations options for this relief. This information will be useful to those people who intend to start building a house on a slope.
Before choosing a suitable foundation, you need to know that foundation equipment technologies are used exactly the same as for relatively flat areas.
The foundation on the slope is based on the same tape, piles or pillars.
The specific option is selected based on the slope angle and soil density.
A strip foundation on a slope is arranged in areas where the slope angle is small.
In other cases, the installation of a strip foundation will be quite expensive.
Strip foundation equip in the form of a stepped design.
By equipping a stepped foundation, expensive earthworks can be avoided. In this case, the strip foundation is arranged in the form of steps that abut against certain terraces.
Without any problems, a columnar foundation is suitable for a gentle or steep slope, but under each column it will be necessary to build a support wall, it increases the base's resistance to lateral deformation.
Without support walls, the pillars can slide down. But this wall is not a guarantor of the strength of a columnar foundation in this regard, an expensive ribbon foundation is more reliable.
For houses built on a slope, a foundation on piles is ideal. Piles allow you to build a foundation at any depth and even on the steepest slope.
A pillar foundation on a slope is not suitable for building a brick house, but only suitable for building wooden or frame houses.
Ordinary piles are produced in lengths from 6 to 8 meters.
The longest large piles are 10 to 12 meters long.
This means that the difference in height from the shortest to the longest is approximately 10 meters,
and this allows you to arrange the foundation even on a 45-degree slope.
The only drawback of the pile foundation is its low bearing capacity. Such a base can withstand a wooden and block house, but no more.
The technology of foundation equipment on a slope depends on the type of foundation structure. This means that strip, columnar and pile foundations are equipped using different technologies.
Next, we will consider the main stages of the construction of foundations on a slope.
The strip option involves the construction of a monolithic base, one of it the side of which will be deeper than the other.
This means that one part of the foundation will be the retaining wall of the slope. Such a construction requires large volumes of pouring concrete .
For this reason, the construction of a strip foundation with a large slope of the slope will be justified only when a structure of brick or concrete will be erected on it.
Stages of the strip foundation device on the slope:
A deep columnar foundation is arranged under mountain or between hills. On very steep surfaces, weakly stable posts will not be able to withstand lateral loads.
For this reason, in this case, building a foundation on a slope is almost the same as building a foundation on a flat surface.
And this means that for the construction of this foundation, it will be necessary to equip an almost level platform, limiting it with two retaining walls.
The space between the wall located above and the wall located below is covered with compacted soil. In this case, the wall located on top will hold the soil located on top, the lower one prevents the terrace from sliding.
Stages of arrangement of a columnar foundation:
The pile foundation is suitable for arrangement on any slope.
The pile foundation almost excludes excavation. Piles are driven in or drilled into the ground to a certain depth, but so that they are in the same horizontal line on the surface.
A monolithic grillage slab is laid on top of the piles, on which the house will be erected.
Stages of construction of the pile foundation:
After completing the construction of such a base, start pouring a monolithic grillage .
It is set up in the formwork, which is equipped with sides and a retaining bottom.
We have analyzed several options for foundations on a slope. We hope you find this information useful.
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