Foundations that allow you to build a private house on bulk soil
Imagine a situation: someone hurried up and bought a plot without finding out the bearing capacity of the soil. The soil turned out to be bulk. And its thickness was not half a meter, but several. Building on such a poorly compacted foundation would be risky even with a slab foundation.
What to do, what foundation to use? You can build a house with a basement: dig a pit by choosing bulk soil and pour a slab or tape on a solid base. But it's expensive: 0.7-1 million. rub. minimum. Moreover, when the base is not planned by the estimate. Another solution is to use a pile foundation. Yes, apply the same technology on which high-rise buildings are being built.
An example of a flat area that did not bode well for "surprises". But when digging a trench, it became clear that there was construction waste below. It is good when the thickness of the fill soil is small. And here - more than 2 m. Here's what you have to do when the thickness of such soil is 3-4 m - to drive piles at the level of the basement:
This is not the construction of a high-rise building. In order to provide a reliable bearing base, it is necessary that the piles go to the calculated length into dense soil with the necessary friction force along their edges. It is clear that the fill soil will provide the minimum indicators of the static friction force.
To drive six-meter piles in a minicoprom, you have to screw the soil, lower the piles into them to dense soils and only then drive them. The process can be seen in a short video:
This type of foundation is suitable for heavy stone structures. Because on driven piles, you can pour a grillage, strip foundation or even a slab.
Another option to build a foundation on soft soils from bulk material for light structures is screw piles:
The process of screwing screw piles into the soil of a former landfill is shown. Also with the screwing process. Because large stones, concrete elements are found in the soils and it is not possible to screw in the piles the first time - you have to go through the construction waste with a powerful auger. This will take longer than the normal process to tighten the screw piles. And the price, of course, will be slightly higher.
Before the process itself on such soils, it is imperative to do geology - to drill exploratory pits. This can be done in companies who will carry out these works.
After screwing and twisting the piles, the upper part has to be concreted to prevent the piles from rolling. In the final - compulsory piling.
You can see more details about this object in the video and assess your situation if you see something similar:
As is clear, any question in such situations with soils in relation to the foundation can be resolved. Yes, it will be slightly more expensive than on normal soil. But custom or enhanced solutions are worth it.
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