Screw the foundation with his own hands

foundation based on screw piles - one of the best solutions in the low-rise building.Its main advantage - the ease of manufacture.In addition to this, it is considered universal: it is used for the construction of various types of low-rise buildings.But the main advantage - it provides an opportunity to build on any, even uneven floors.This foundation is suitable for different climatic conditions and ensures high reliability even in the very structure of the difficult terrain.Among other things, the foundation screw is easy to make your own hands, and it is suitable for any soil except for rocky.In this case, the metal supports screwed to the desired depth not possible.

Read more about the advantages of screw pile foundations

First you need to briefly list the advantages of screw foundations, and then we can consider each section in detail.Thus, the advantages of screw piles:

1. High strength and durability of the real.
2. relative cheapness.
3. simplicity and speed even self-assembly.
4. High reliability on unconsolidated sedimentary soils.
5. successful use on the slopes.

In practice, found that the concrete bases are destroyed faster than the pile foundation.This is due to the fact that the concrete foundation is much more prone to sediment deformation.This leads to a marked decrease of their carrying capacity.

If we compare all the costs of the base unit on screw piles with the cost of construction of strip foundation, it can be concluded that the pile is much cheaper, which saves money for other types of construction works.

If we talk about the speed of installation of pile foundation, here the advantage of him.It takes only one day to screw in the required number of piles for a small house or other structure.This is all due to the fact that:

• No need to dig trenches or some pits.
• not need any kind of special equipment for manual installation of small piles.It will cope with this work 2 or 3 people.
• no need long waiting, as the concrete is used in the manufacture of the foundation.
• not need to screw into the ground piles, no special skills and knowledge.

on fragile soils or sediments might only use the type of pile foundations.After all, only he is able to get to the dense layers of rock and gain a foothold in them the ends of piles.Piles are indispensable on the slopes, because when sufficient bias would have to use a huge amount of concrete in monolithic device.

main disadvantages of screw piles

not devoid of foundation on screw piles and disadvantages:

• inevitable corrosion of the metal.
• Certain limitations in the application.
• absolute impossibility of mounting piles next to the existing wall structure.
• Some restrictions on bearing piles properties.

metal corrosion inherent in any metal products, is no exception to that and piles.The more that the construction of a building on stilts forming a layer of air between the ground level and the bottom of the structure.It is here that collects the condensate that can destroy the structure of the metal piles.For above-ground part of the problem is successfully solved by processing metal products or corrosion preventive compounds use galvanized elements.Underground part in any case after 20 - 25, thinned by moisture and reactive minerals.This will lead to subsidence of the structure under its own weight.

screwing piles impossibility in the immediate vicinity of existing buildings due to the fact that it uses a long steel pipe, threaded into the well head.For piles of rotation required by the diameter of a circle equal to the length of the tube.Does not solve the problem of equipment and attachments tractor as the tractor, too, will not be able to effectively maneuver against the wall.

Based on the above, we can conclude that the screw piles are good for buildings, the life of which is not planned for more than 25 years.They can only be used on certain types of soils.Screw piles are designed for the construction of low-rise buildings of small light materials.In any case, before the construction of a structure on screw piles are necessary to make them literate calculation.

device screw foundation with his hands

Any helical pile is a steel pipe with a thick-walled circular section.Its lower part is sharpened and provided with helical blades.At the top there is a massive headroom, which after installation of piles mounted piping of the building.This headroom is sometimes used for screwing the pile into the ground.It can be done manually using a long tube or by using attachments to the tractor.

How to make a correct calculation of pile foundation

First you need to conduct a survey of the land, where the planned construction of the structure on screw piles.To calculate the foundation requires several steps:

• Determination of the ultimate strength of each pile in accordance with known mechanical properties and geometrical dimensions of the material.
• calculation of weight load limit, which is able to withstand the soil.
• Determination itself bearing capacity of pile foundation.If

prepared standard screw piles, they are steel pipes having a diameter of about 100 mm and a wall thickness of 4 mm.They are equipped with screw blades with a diameter equal to 300 mm.In this case, the load bearing capacity of any amount to support:

• Up to 9 m on sandy loam and sandy soils types.
• Up to 4 tons of alumina.Prior
• 6 into very loose rocks with clay content less than 10%.

After that define the allowable load on the ground.To do this, consider not only the type, composition and even the characteristics of the soil at the construction site.Among other things, it is necessary to correctly determine the maximum and minimum level of groundwater.These actions require the implementation of geological surveys in the area, which involves serious costs.However, it is always possible to take into account the experience of building plots in the neighborhood or to find background information on the physical characteristics of the soil in the area where the land is located.Pile foundations are calculated taking into account:

• maximum possible weight of the building with all communications, equipment and furniture
• greatest load of snow on the roof.
• wind loads in the region.

important to remember!The pile should be placed at a distance of not less than 1.5 and not more than 3 m from each other.Places to install them is placed in accordance with the specified regulated construction loads in its various parts.

markup land

foundation on screw piles are very reliable and durable.This solution is highly resistant to climatic changes and shifting of soil.However, it must be done one important condition: it is necessary to perform the installation of the most competently and correctly.The error in the distance between the piles and the vertical cross-section should not exceed 1-2 cm. Otherwise, in the future can be faced with very serious problems, such as sagging grillage, violation of the bearing capacity of the walls, skewed buildings and other troubles.

There is a good method of calculation, which is ideal for buildings with any complexity layout.Note that any foundation piles at a screw so that the load on them, and the ground has been distributed sufficiently evenly.Therefore it is necessary to take the plan of the future building and split it into rectangles.On their sides and diagonals must be placed blocks of screw supports, given the required distance between them.When markup is necessary to remember that each pile is required to be at the center of each supporting beam of the building.

give an example.Breaking the whole plan of the building into separate boxes and determining the size of each of them, we can calculate the required number of piles and distribute them throughout the area in view of the uniformity provided by the load on the foundation.After graduating from the layout you want to transfer pattern on the terrain while maintaining the scale and in the installation of piles driven into the ground points of any pegs.

material acquisition

are commercially available as ready-made piles and parts for their manufacturing.For obvious reasons, the finished product is more expensive.In any case, you should ask the seller a certificate of quality on any purchased products.If it is not, just pass by.For guaranteed durability and reliability will ensure our security.

The standard length of 2.5 m of screw piles, and screwing depth should be at least 1.5 m. However, the freezing of the soil to a greater depth, the support must be installed at least 200 mm below this level.It should also be borne in mind that over the land will be only 1 meter of the pile, so if you want to raise the building above the basement - buy pipe length.Similar steps are being taken to buy piles on uneven land.

make installation of supports, end to them and grillage

For proper installation of the helical foundation alone, we will need under each screw pile drill technological hole to a depth of at least 50 cm. For these purposes, you can use the manual, electric or petrol drill with appropriatethe length of the nozzle.It is best to screw screw piles in the winter.If there is a technological hole, then install piles in frozen ground will not be easy.In addition, at this time, the material is sold with a decent discount.

Initially engaged in the installation of the corner piles.To this tube is inserted in a pit at the end of a screw and by means of a long lever by two persons pipe is screwed into the ground to the required depth.If you want, you can use a kind of extension cord - shaped metal tube with ears, which is put on the upper end of the pile.

In the process of tightening should not forget about the control of verticality, which is carried out using a plumb gidrourovnya every 2-3 turns.Alternately screwing all corner posts, proceed to intermediate.Screwed them similarly angled.It should only take into account the relative position of the supports.They should be easy to screw manually via levers.

Strapping pile foundation

setting the foundation on screw piles, it must be remembered that the support will bear the grillage, ie piping.It can be a wooden timber of 150x150 mm, metal or concrete.For its correct and easy installation, we need the top of the rack welded headroom.It is important to ensure that they are exactly at the same horizontal level.

But before installing the end walls inside the pipe to pour concrete solution.It will not only give additional strength to the piles, but also protect the inner surface from corrosion.Indeed, in contrast to the exterior, it is in no way been treated.Speaking of headroom, it is worth mentioning the fact that they represent a flat metal platform, which are welded to small segments of a circular tube, the inner diameter of which is slightly larger than the outer diameter of the pile.This headroom just put on a pile and is welded to it.Weld necessarily treated corrosion-resistant composition and color.This design headroom makes it easy to adjust the level on which is mounted grillage.After installing it can be stated that our helical pile foundation is ready.

As you can see, the construction of the basement of screw piles is not too wise occupation.Run it can practically everyone who is not afraid to perform manual physical work independently.