RU163360U1 - SCREW PILES - Google Patents

Abstract

1. A screw pile, including a cylindrical shaft, a tip with a spiral, characterized in that the cylindrical shaft of the pile is made in lengths from 500 mm to 699 mm, the tip with a spiral is made in lengths from 150 mm to 299 mm, the spiral is made with a spiral pitch from 20 mm to 39 mm and a spiral blade width from 11 mm to 20 mm, the thickness of the end of the tip cone is from 10 mm to 24 mm. 2. A screw pile according to claim 1, characterized in that it is provided with a flange with a thickness of 11 mm to 20 mm with holes with a diameter of 16 mm to 50 mm. 3. A screw pile according to claim 1, characterized in that the flange is made in the form of a ring with round or oval holes. 4. A screw pile according to claim 1, characterized in that the flange is made in the form of a disk with diametrically located holes and a central hole.

Description

The utility model relates to the construction, in particular, to the construction of pile foundations, and can be used for the construction of low-rise houses, modular buildings, bathhouses, terraces, greenhouses, hangars, pipelines, advertising structures, road signs and signs, noise screens, line supports lighting and communications, garden furniture, fences and fences, the bases of solar panels and wind generators.

A device for mounting an object in the ground is known. The device is hollow, contains a cylindrical part in which an object is installed (rod, pole, mast), an anchor part for fastening in the ground. The anchor part is formed in one piece with the cylindrical part, made cone-shaped, has at least two conical parts with different taper angles. The conical part of the anchor is provided with a spiral. At the top of the cylindrical part, a hole is made for mounting the fastener. (German Patent No. 9313258, IPC Е04Н 12/22, publ. 24.03.1994).

Known screw pile, including a cylindrical barrel 76 mm and a tip with a spiral. (Screw supports, http://glavzabor.ru/category3.php)

The closest technical solution to the claimed utility model is a screw pile includes a cylindrical shaft with a length of 700 mm to 3000 mm, a tip with a spiral with a length of 300 to 1000 mm, the spiral is made with a spiral pitch of 35-40 mm and a spiral blade width of 10 mm, end thickness tip cone is 25-30 mm. The cylindrical barrel can be made stepped, consisting of at least two sections with diameters decreasing towards the tip from 140 mm to 66 mm, and part of the barrel is equipped with an additional spiral. The pile can be equipped with a flange with a thickness of 8 mm to 10 mm with holes with a diameter of 10 mm to 15 mm, made in the form of a ring with holes or a disk with diametrically located holes and

center hole. (RF patent No. 117933, IPC E02D 5/56, publ. 10.07.2012)

A disadvantage of the known structures is the lack of adhesion to the base (soil), a narrow range of applications, i.e. An object can only be immersed in a pile; only one type of fastener can be used to immerse a pile.

The technical problem, the solution of which is claimed by the claimed utility model, is to increase the adhesion strength of a screw pile with soil to create a stronger anchor effect.

The stated technical problem is solved in that in a screw pile, including a cylindrical shaft, the tip with a spiral, according to the proposed utility model, the cylindrical shaft of the pile is made in lengths from 500 mm to 699 mm, the tip with spiral is made in lengths from 150 mm to 299 mm, the spiral is made with a spiral pitch from 20 mm to 39 mm and a spiral blade width from 11 mm to 20 mm, the tip cone end thickness is from 10 mm to 24 mm.

A screw pile is characterized by the following additional essential features:

- the screw pile is equipped with a flange with a thickness of 11 mm to 20 mm with holes with a diameter of 16 mm to 50 mm;

- the flange is made in the form of a ring with round or oval holes;

- the flange is made in the form of a disk with diametrically located holes and a central hole.

The technical result, the achievement of which is ensured by the implementation of the claimed combination of essential features, is to increase the adhesion strength of a screw pile with soil to create a stronger anchor effect.

The essence of the claimed utility model is illustrated by drawings, where

in FIG. 1 shows the graphs of the dependence "load-sediment piles" S = f (P) at sites No. 1, 2, 3, respectively;

in FIG. 2 shows the graphs of the dependence "load-output piles" DV = f (PV) on the sites, respectively, No. 1, 2, 3;

in FIG. Figure 3 shows in a graphical form the result of graphic processing of the data of the excesses and deformations of the BAU Screw Foundations and soil;

in FIG. 4, 5, 6, 7 are graphs of the dependence of the deformation of piles No. 1, 2, 3, 4 with a length of 2 m from the action of horizontal load;

in FIG. 8, 9, 10, 11 are graphs of the dependence of the deformation of piles No. 1, 2, 3, 4 with a length of 2.5 m from the action of the horizontal load;

in FIG. 12, 13, 14, 15 are graphs of the dependence of the deformation of piles No. 1, 2, 3, 4 with a length of 3 m from the action of the horizontal load.

A screw pile includes a cylindrical barrel, a tip with a spiral, which are hollow.

The cylindrical shaft of the screw pile is made over the entire length with a constant diameter value and a length of 500 mm to 699 mm.

The tip of the screw pile is made in lengths from 150 mm to 299 mm. The length of the tip is selected depending on the reinforced structure in accordance with the requirements of reliability of fastening in operation. The thickness of the tip cone end is from 10 mm to 24 mm, which reduces the complexity of its immersion in the ground.

The spiral is made with a pitch of a spiral from 20 mm to 39 mm and a blade width of a spiral from 11 mm to 20 mm.

For different types of soils, a wider range of pile shaft lengths is needed. The proposed implementation of a screw pile with the indicated intervals of the geometric dimensions of the structural elements increases the true area of adhesion of the pile with the ground, which increases the anchor effect, thereby increasing the reliability of the pile foundation.

For fixing supports in a screw pile, known fixing means are used. For example, nuts for fastening bolts are welded to the pile. And the support, for example a pipe, when installed in a pile, is fastened in it with the help of bolts.

The pile is additionally equipped with a flange from 11 mm to 20 mm thick with holes for bolts or studs. The holes are made with a diameter of 16 mm to 50 mm. The flange can be made in the form of a ring with round or oval holes or in the form of a disk with diametrically located holes and a central hole. For example, the flange can be made with a diameter of 220 mm with a distance between the centers of diametrically located holes 167 mm. The diameter of the central hole can be made 24 mm for a bolt with a thread of 24 mm. The presence of a flange simplifies and facilitates maintenance work on the installation of the foundation, ensures the stability of the structure. The various flange options available expand the range of application of piles.

When carrying out calculations and experimental work, the applicant concluded that the proposed size range of piles provides a reliable installation of the structure on various soils.

The reliability (bearing capacity) of the pile foundation depends on a number of factors that are taken into account when choosing the size of screw piles and the depth of immersion of piles, in particular on the total mass of the structure as the sum of all the loads acting on the foundation, snow and payload, depending on the purpose and area of location , strength and deformation characteristics of soils and other factors.

The execution of a pile tip equipped with a spiral from 150 mm to 299 mm long with a spiral pitch of 20 mm to 39 mm and a spiral blade width of 11 mm to 20 mm is optimal for providing high bearing capacity of the screw foundation, which is due to the fact that when immersed in the ground of the tip, the inter-turn gaps of the soil do not loosen, but rather are sealed with a spiral of a screw pile, increasing the anchor effect, especially for complex soils.

The small area of contact with the soil (the thickness of the tip cone end is from 10 mm to 24 mm) and the presence of a spiral with the proposed geometric dimensions do not create critical pressure even on soft peat and sandy soils and do not allow the foundation to move even with deep freezing of the soil and at the same time reduce the complexity its immersion in the ground. Installation time takes only a few minutes.

The inventive screw pile is installed strictly vertically using special improvised means or machines. Installation time takes only a few minutes. Moreover, the contact area of the proposed screw pile foundation with the soil is insignificant compared to conventional foundations, due to this, such a foundation is much less susceptible to various kinds of movements, seasonal variations in the soil and distortions.

The foundation on the basis of such screw piles does not create critical pressure on soft and unstable soils, therefore, it can be installed without preliminary exploration. The use of this foundation is possible not only on complex soils, but also in earthquake-prone areas where ordinary concrete foundations can be damaged or destroyed, in addition, it is environmentally friendly and economical.

Claims (4)

1. A screw pile, including a cylindrical shaft, a tip with a spiral, characterized in that the cylindrical shaft of the pile is made in lengths from 500 mm to 699 mm, the tip with a spiral is made in lengths from 150 mm to 299 mm, the spiral is made with a spiral pitch from 20 mm to 39 mm and a spiral blade width from 11 mm to 20 mm, the thickness of the end of the tip cone is from 10 mm to 24 mm. 2. A screw pile according to claim 1, characterized in that it is provided with a flange with a thickness of 11 mm to 20 mm with holes with a diameter of 16 mm to 50 mm. 3. A screw pile according to claim 1, characterized in that the flange is made in the form of a ring with round or oval holes. 4. A screw pile according to claim 1, characterized in that the flange is made in the form of a disk with diametrically located holes and a central hole.

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