Homemade screw piles: a diameter of for what purpose, manufacturing algorithm

Manufacture helical pile at home is quite realistic and successful experience FORUMHOUSE users - a clear proof

Manufactured screw piles their own hands difficult, but - as possible. Therefore, let us take the liberty to describe this technology. And help us in this advice FORUMHOUSE users.

calculation svayno-Ground Screws - it is a complex job that requires the participation of specialists. Only the designer will be able to calculate the total number of screw piles, The density of their location on the site, as well as thickness. But if you want to build a house on a pile-helical foundation, this article will find the answer to the question how make yourself screw piles, as there are standard recommendations, concerning the definition of their sizes.

Content:

• How to make a screw pile. Design
• Trunk
• Cone
• Blade
• headroom
• Corrosion protection

How to make a screw pile. Design.

To begin, consider the general form of homemade and define its main features.

The pile made by the user of our portal has tetrahedral tip and equipped with a metal spiral blade. Such variations should be made according to the drawing shown in

a photo.

Consider the process of making the basic elements outlined in FIG.

Trunk

Base (trunk) of a hollow metal tube.

In all cases, it is recommended to produce barrels of steel strength of at least Article 20 in accordance with GOST 8732-74 (for ordinary structural steels). If used more robust steel alloys, it is suitable to GOST 19281 (but in the home can be limited to the first embodiment).

The first thing to do creator piling - define its barrel length. Various "tricks" he'll have to find out how deep the construction site is hard ground. The most correct (but expensive) solution is to appeal to the geological and intelligence service. But among sociable neighbors can find a person who has a reasonable understanding of the state of underground formations.

Tube length should exceed the depth of occurrence of the carrier layer of about 300... 500 mm (if the pile will protrude from the ground up, this distance may be greater). People wise practical experience, it is recommended to make a length of piles with a reserve, so that later they do not have to build up.

BSergeyM

user FORUMHOUSE

Spun 17 pieces (Building 9 at 8). The site on the slope. Part piles clipped, some boosted and filled with concrete.

To determine the diameter of the pipe can be made to snip 2.02.03-85 (with its tables and formulas). But those who are not familiar in practice with the design of building structures, guided by the less sophisticated calculations:

• The pipe diameter of 47 to 76 mm is used in the construction fences and various lung defenses
• Piles 89 mm diameter is used in the construction yard buildings (gazebos, baths and the like. D.), As well as brick construction fences
• For the construction of frame houses and buildings used chopped versions of diameter 108 mm.

At home with your own hands screw piles with a diameter greater than 108 mm (which are able to withstand high loads) is not recommended. For them, the need reinforced blade, and to ensure that high-quality products at independent manufacture will be very difficult.

Alex Oreshkov

user FORUMHOUSE

The larger the diameter, the more difficult to make the screw that is on the blade itself unbending.

The minimum thickness of the barrel wall should be 4 mm. Its calculation is simple - the thicker, the better. But choosing a wall thickness, it should be remembered that the cone of the pile will have to stick with a hammer.

Alex Oreshkov

I myself did screw piles, make yourself really. Tube - 68h4 mm screw - with a diameter of 168 mm, the thickness of the screw - 5 mm pitch on the screw - 50 mm, tetrahedral tip length - 150 mm. All very well cooked semiautomatic.

Piles of screw by hand. Cone

As seen in the figure, cone - a tip of the pile. Its length is from 1.5 to 2 pipe diameters. It is a standard, but some do a little more length to the cone was sharper and easier to sign a pile into the ground.

At home, the cone is made quadrangular or hexagonal. To do this, cut the edge of the trunk specific sectors, which are bent into a cone with a hammer and scald welding.

stone

user FORUMHOUSE

Pattern made of thick paper, pre-dividing the circumference of the tube into equal parts. Then he spaced pipe marker and made a saw cut grinder. The result was so-called crown. The thickness of the pipe can easily bend it with a hammer. At first, it came out very ugly, but all the welding defect persists, and the island was completely sealed, which allowed immediately after the spin tube filled with concrete.

Here's how it looks in the photo:

As you can see, the barrel marking was carried out on paper templates. Produce it's pretty simple. For this diameter of the pipe circumference is divided by the number of sectors. Found value - this is the distance between the top points of adjacent sectors. Data can be easily transferred to the paper drawing and get ready template. Further steps consist in cutting the "crown" to bend the petals and welding joints obtained.

Before bending the cone petals at the base of the crown should be to make small slits. Then shape the tip will be easier.

The design of screw piles. Blade

Blade - the main working part. It should produce from sheet steel with a thickness of 5 mm. So many prefer to do. Someone can make a blade 6 mm thick, but correct bend such detail is much more difficult. blade material - carbon steel of ordinary quality (GOST 380-71). Optimally use brand Article 3 (it is used even in the industrial production of piles).

Now it's time to talk about the shape of the blade. Creating its geometry - the most important stage of the work. And if you make a mistake, it will not simply pile screwed into the ground.

To start to define inner and outer diameter of the workpiece to the blade. The outer diameter of the blade (the width of the pile) is directly dependent on the diameter of the pile shaft. Take a look at the table.

The inner diameter of the blade corresponds to the diameter of the pipe. Only here the dimensions of the workpiece (bearing in mind that it will bend to form a screw pitch) are slightly different from the already familiar diameter. A simple solution to determine workpiece dimensions offers us a user portal FORUMHOUSE.

Ergali

user FORUMHOUSE

Take the tube and measure off her propeller pitch. Thereafter, measured on a pipe loop length, divide by Pi and receive the inner diameter of the workpiece. The width of the blade is added to the inner radius of the preform and receive the outer radius of the workpiece.

Now a little about how to determine the screw pitch. Typically propeller pitch is 0.2... 0.4 times the outer diameter of the blade. If the screw pitch is smaller, the small solids that are in the ground, get stuck between the blades, preventing the effective propagation of the pile. If this figure will be more, you'll have to make a greater effort to be screwed into the ground.

What specifically use a step - it depends on what the soil to be screwed into the pile. Simply focus on soil characteristics: the harder the soil on your site, the less should be done step screw. On sandy ground (predominant in the east of Moscow) step is maximized.

Once all dimensions have been defined, you can proceed to the steel sheet marking and cutting of the workpiece. To cut the workpiece contour, we need the plasma cutting of sufficient power, and that it was available, care should be taken in advance.

In the next stage the die cut blank is bent according to the selected pitch propeller. At home, it can be done with ordinary vice and improvised.

user FORUMHOUSE BSergeyM It offers its own version of tools for straightening vanes.

Please note that the bend in the blade cutting edge is obtained very little. This is done always. Enough of the bend to the pile, like screws, sign into the ground.

On the part of the blade which will first enter into the ground, it is necessary to make a cut at 45 °. This will help the pile easily get a solid mechanical inclusions, which are in the ground.

In the next stage of the finished part is welded to the pile shaft. The seam is laid on top and bottom blades. The blade must be welded perpendicular. Otherwise pile during screwing will loosen the soil, destroying and weakening its structure. And a weakened soil pile will not be able to cope with the load assigned to it.

After all the above operations work on creation of the bottom of the pile can be considered finished.

Top part. Make a well head on the pile with their hands

At the top of the pile should be made two holes to help yourself to screw the finished product into the ground. They can be simply cut through welding.

At the top of the pile should be made two holes to help yourself to screw the finished product into the ground. They can be simply cut through welding.

Headroom on piles can also be made independently. It's enough to have on hand a suitable materials and welding machine.

You can use the FORUMHOUSE user experience.

BSergeyM

Top made headroom (120 to 120 mm) of ten. With four sides made scarves and welded parts for all aligned piles. After that, the entire perimeter of the I-beam and tied 24 all scalded.

When the pile is screwed, and the installation tip is not yet fulfilled, the inner cavity of the product can be filled with concrete. This will give strength around the pile foundations.

Corrosion protection

The problem of protection against corrosion DIY at home does not have a unique solution. But a couple of options still exist:

• Application of the ship paint.
• Application of primer on metal.

If these materials in the two layers applied to the surface of the pile, the protective layer is maintained even after screwing into the ground product. Just before application of paints pile should be thoroughly cleaned of rust and degreased.

But some non-standard way out of the situation by offering our portal.

Alex Oreshkov

I am, after twisting, pile dig around half a meter, tinted asphalt paint and wrapped with roofing material.

Some merit in it, because the pile at a depth of more than half the corrosion hardly exposed.

Discuss the many nuances manufacture of screw piles with their hands you can in a special section FORUMHOUSE. Find lots of useful information relating to regulations for the construction of foundations, in the section "Links for foundations». Find out, what threatens the construction of the foundation violations and how to fill in the tape in the ground without formwork. Also on our website you will find a short video telling about features of pile foundation.

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