What soils are used
The general scheme of the construction of the column foundation on stilts from the pipes looks as follows. At the pre -marked points of the site, wells are drilled in the ground. In the wells, metal, asbestos -cement or plastic pipes are installed, which are filled with concrete. To give greater strength before pouring concrete, the pipe cavity is reinforced. Next, the created piles and the formation of a grillage are binded, which will more evenly distribute the load on individual supports.
A fine -sized method is used on dry, non -poudy soils. The depth of the installation of supports in this case is 0.8 meters, and the growth of the grillage is carried out at an altitude of 30-40 cm from the surface of the earth.
In areas with a high level of groundwater, on unstable soils (sandy and sandy loam), a deepened method of device is used. In this case, the supports should “fall” below the depth of freezing of the soil, in the middle latitudes it is 1.2-1.5 meters. After drilling the well, coarse -grained sand falls asleep at its bottom, which will serve as a “pillow” for the future pile.
Another popular option today is screw piles. A screw pile is a metal pipe with special blades at a “working” end. With the help of these blades, the pile is effectively “screwed” into the ground and acquires the necessary stability.Calculation of the diameter and number of pipes
Of course, the columnar foundation (like everyone else) should have the necessary margin of strength in order to withstand the weight of the future building.
If the house is built, then its total weight is made up of the weight of the “house structure” itself, to which the weight of engineering communications, furniture, household appliances and future residents should be added, as well as add “seasonal load” from precipitation.
Next, you should find out the weight that can withstand a separate support. Obviously, the larger the diameter of the pile, the higher the load that it can withstand. For example, depending on the soil, pile based on a steel pipe with a diameter of 300 mm is able to withstand from 700 to 1000 kgf.
The division of the total load into this figure determines the number of necessary piles. In this case, the piles must be installed at the corners of the future building and places of the walls of the walls, where the load is maximum. After that, it is possible to create a plan with exact places for future piles. As a rule, the average step is from 1 to 2 meters.Advantages and disadvantages
Many advantages of the installation of piles from pipe stones are already obvious. This is a noticeable benefit in the price of both the materials used and the work performed. This is a high installation speed, while work can be carried out in almost any weather conditions. And this is really a real opportunity to do all the work with your own hands.
The main drawback of such “manual” pile foundations is a low bearing capacity: therefore, most often they are used as a support for one -story structures and for economic buildings.
The columnar foundation of pipes is not recommended to be built in uneven areas. And in any case, the house will need additional "insulation from the bottom."For which they appreciate the foundation on steel piles from pipes
At the same time, the construction technology on piles from pipes with the necessary finalization and use of special construction equipment can be used in the construction of large facilities.
Various types of brownish technology essentially repeat the same sequence of actions. A casing is installed in a drilled leadership well, which will serve as a protective casing and protect the walls from shedding soil and penetration of groundwater. After reinforcing the metal frame, a gradual “stuffing” is carried out, that is, filling the cavity of the concrete mixture: after its hardening, the brownish pile is ready.
Modern industrial technologies using casing pipes allow you to create brownibular piles up to several tens of meters. At the same time, the pluses are all the same: the reliability of the future pile, the speed of installation, the ability to work in conditions of dense urban development and in areas where the creation of “traditional foundations” is either economically impractical or simply impossible.
This is what makes pile technologies more and more in demand in the construction of objects of various purposes. The production of piles takes an important place in the products produced by the Zagorsky Pipe Plant. Buyers are offered steel pipe piles with a diameter of 508 - 1420 mm.