RU2569654C1 - Syringe-type screw pile - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: syringe-type screw pile comprises a tubular shaft with a helical blade fixed on it, besides, the lower end of the tubular shaft is made with single-sided sharpening and is rigidly closed. Above the screw pile there are holes in the shaft along the spiral, the twisting angle of which matches the angle of helical blade twisting, at the same time the pitch of hole arrangement is chosen depending on soil density.

EFFECT: increased bearing capacity of a pile due to increased adhesion of pile shaft with soil, increased reliability of a pile during its operation.

2 cl, 2 dwg

Description

The invention relates to the construction, in particular, to the construction of screw piles, and can be used in various soil conditions for the construction of medium and light-weight objects, such as road signs, information boards, arbors, supports of electric lines, etc.

Screw piles are known in the prior art, including syringe piles manufactured, for example, by SVAIGOST company (http://svaigost.ru) or, for example, by FUNDEX company (http://www.fundex.su). The syringe pile is a welded steel pipe with a welded blade, the hollow barrel of which is cut at an angle of 45 degrees.

Also known pile screw syringe according to the technical solution described in CN patent No. 2015531022 (publ. 21.07.2010). This pile, like the piles described above, has a steel hollow body with one or two spiral-shaped blades welded to it and a lower end cut at an angle.

A disadvantage of the known solutions is the low reliability during operation, because when a pile is placed in the soil, the latter is strengthened only directly below the pile, and the soil around the pile shaft, on the contrary, loosens during the penetration of the pile into its thickness.

The closest in technical essence and the achieved result to the proposed technical solution is a screw pile (RF patent No. 85919, publ. 08/20/2009), which is structurally a tubular barrel with a screw blade fixed to it and one-sided sharpening of the lower end of the tubular shaft. The lower end of the tubular barrel can be rigidly sealed with a plug or left open, and a one-sided sharpening can be made with an angle from 10 ° to 80 °. The pile has a simple design, however, in the process of application, the pile has insufficient bearing capacity and low reliability during operation. This is due to the fact that when placing the pile in the soil there is no uniform compaction of the soil around the pile shaft, the soil is strengthened only under the pile.

The problem to which the proposed technical solution is directed is to create a new screw pile, which allows to expand the arsenal of types of screw syringe piles.

The technical result achieved by solving the problem is to increase the reliability of a screw syringe pile during its operation.

The task and achievement of the technical result is ensured by the fact that in a pile of a syringe-shaped screw containing a tubular barrel with a screw blade fixed on it, and the lower end of the tubular barrel is made with one-sided sharpening and rigidly sealed, according to the present invention, holes are made under the screw blade in the barrel in a spiral, the twist angle of which coincides with the twist angle of the screw blade, while the pitch of the holes is selected depending on the density of the soil.

There is an option for the development of the main technical solution, which consists in the fact that at least one hole is made in a rigidly sealed one-sidedly pointed lower end of the tubular trunk.

Thus, the claimed technical solution with all its essential features makes it possible to increase the reliability of a screw syringe pile during its operation. This is because it becomes possible to inject the soil-strengthening mixture under pressure through holes located under the screw blade evenly in a spiral, the twist angle of which coincides with the twist angle of the screw blade around the tubular pile shaft, forming an additional supporting surface of the pile support during its operation due to the involvement of the soil with the formation under the helical blade along its spiral around the tubular trunk of the corresponding hardened soil layer, since around the pile the directional structure that fixes its position, the soil adjacent to it, reinforcing the piling of the pile in accordance with the path of the pile blades, thereby increasing the reliability of adhesion of the near-pile soil between itself and the pile.

The applicant conducted a patent information search on this topic, as a result of which the claimed combination of essential features was not identified. Therefore, the present invention can be recognized as new.

The compliance of this invention with the patentability criterion of "inventive step" is justified by the following.

This invention for a specialist does not follow logically from the prior art. So, for example, all known screw syringe piles, in the barrel of which holes are made perpendicular to the axis of the barrel (for example, RF patent No. 116512 "SCREW PILES (OPTIONS), published on 05.27.2012).), During operation unevenly strengthen the soil, t .to. through these holes, hardening occurs only on the sides of the pile with the formation of individual beams that fix its position. This leads to the fact that with external force due to the small footprint in the lateral soil, displacement and inclination of the tubular pile shaft are possible.

In the claimed invention, the situation is different. When feeding the soil-strengthening mixture into the soil through openings made under the screw blade uniformly in a spiral, the twist angle of which coincides with the twist angle of the screw blade, this mixture is ejected along a spiral path, therefore, the mixture compresses the pile tubular trunk, thus forming “petals-spikes” ", Which are an additional supporting heel for hardening the soil around the pile, and, therefore, an increase in the fixation of its vertical position is achieved, because the pile is based on them, and, as a result, increased reliability during operation of the pile.

The essence of the technical solution is illustrated by the figures and the following description.

In FIG. 1 shows a General view of a screw syringe pile.

In FIG. 2 shows a bottom view of a screw syringe pile. The positions indicated:

1 - tubular trunk.

2 - screw blade.

3 - pointed and rigidly sealed the lower end of the tubular trunk.

4 - hole.

5 - hole.

The screw syringe pile (Fig. 1) comprises a tubular barrel 1 on which a screw blade 2 is fixed. The lower end 3 of the tubular barrel 1 is made with one-sided sharpening and is rigidly sealed. Under the screw blade 2, holes 4 are made in the barrel in a spiral, the twist angle of which coincides with the twist angle of the screw blade 2, while the pitch of the holes 4 is selected depending on the density of the soil. So, for example, with increasing soil density, the pitch also increases.

At the lower end 3 of the tubular barrel 1, at least one opening 5 can be made. In FIG. 2 shows a variant with two holes made 5. These holes 5 make it possible to more fully distribute the soil fixing solution under the pile at the place of its immersion in the ground.

To increase the bending strength of the tubular shaft 1 of the pile, to increase its bearing capacity and increase the service life, the cavity of the pile is filled with concrete or a solution of a different composition, which when filling the cavity passes through the holes 4 and 5 of the pile into the ground, strengthening the soil around the tubular trunk of the 1 pile and more firmly and firmly fixing the pile in the ground. Moreover, when the pile is immersed in the soil while filling with a solution of its cavity, the soil will strengthen along the entire height of the tubular trunk 1, because the solution from holes 4 and 5 will penetrate into the soil as the piles sink.

Thus, the use of the proposed design of a screw pile will significantly increase its bearing capacity by increasing the adhesion of the pile shaft to the ground, increase the reliability of a screw syringe pile during its operation.

Claims (2)

1. A screw syringe-like pile containing a tubular barrel with a screw blade fixed on it, the lower end of the tubular barrel being made with one-sided sharpening and rigidly sealed, characterized in that the holes in the barrel are made under the screw blade in a spiral, the twist angle of which coincides with the twist angle screw blades, while the pitch of the holes is selected depending on the density of the soil. 2. A screw syringe pile according to claim 1, characterized in that at least one hole is made in a rigidly sealed one-sidedly pointed lower end of the tubular barrel.

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