Modern technologies somehow completely imperceptibly brought one more innovation to our life, previously available mainly for the military and geologists (lovers of hard-to-reach places), a screw foundation. At the same time, the relative simplicity and speed of creating such a construction using special piles gradually "moves" aside the ribbon and columnar foundations we are used to.
But whether such a foundation really is a universal solution for building a solid and durable foundation for a house. In the article we will explain how to do it, we will give detailed step by step instructions,
Screw piles
This is a metal pipe (treated with a special compound that slows down the corrosion process), the blade is welded to the lower pointed end. Such a pile is screwed (screwed) into the ground (like a screw into wood), practically without damaging it (only compacting it by immersing the pipe) and, therefore, absolutely not reducing its carrying capacity.
These piles are available in several types:
And, of course, the type and shape of the pile also depends on the manufacturer, which produces it.
What a screw foundation looks like
A screw foundation looks like this:
Difficulties for the installation of screw piles
fairly simple design. However, “pitfalls” are waiting for you here:
Installed pile
However, the screw foundation has advantages:
Basics can be arranged on any soils with the exception of rocky ones, since the rock itself is an excellent solid base (for a band or columnar one).
Bath on screw piles
It is quite possible to make a foundation under small building (garage, gazebo, veranda, one-story wooden frame house):
For a screw foundation, it is not worth saving on material. Piles should be made only from new pipes of the required thickness, while they should be thoroughly cleaned of rust and covered with a protective compound.Particular attention is paid to the quality of the welding joint at the point of attachment of the blade, since on sufficiently dense soils, the seam may burst without sustaining the load applied to the pile.
To facilitate the process of screwing in the pile in its upper part (which you then cut off with a “grinder”), you must make two holes - you will be able to put bars in them with which the pile is screwed into the ground.
Marking of the screw foundation
Installation should be carried out as accurately and competently as possible. The maximum permissible error in the vertical section and between the piles is no more than 2 cm. Otherwise, in the future you may be faced with the need to repair the grillage due to its sagging. And this, in turn, will lead to a violation of the load-bearing wall and even to the building skew.
The basis on the screw piles should be located so that the load on it and on the ground is distributed as evenly as possible. So take a plan of the house and break it into rectangles. On their sides and diagonals should be placed blocks of supports, taking into account the required distance between them. With all this, each pile should be in the center of all the supporting beams at home.
Marking the area for installing piles
So, divide the house plan into rectangles, having previously determined the size of each of them. So, you can calculate the number of piles and distribute them over the area so as to evenly distribute the load on the foundation. After the completion of the planning, transfer the markings from the paper to the surface of the earth, on which the house will stand on piles. In the installation points of piles hammer in pegs.
Work is performed in the following sequence:
Self-installation of screw piles
Screw foundation of the screw foundation
Learn all about arranging screw foundation, watching the following video: