RU170986U1 - CONCRETE SCREW PILED - Google Patents

Abstract

The utility model relates to the field of construction, namely to the elements of the foundation of buildings, power transmission towers, contact network towers, cell towers, fences, anchors, temporary towers, pipelines, moorings, etc. The technical result of the utility model is to increase the reliability of the structure concrete screw piles and the method of its installation by ensuring the uniformity of the applied forces when screwing the piles into the ground. The claimed technical result is achieved through the use of the construction of a concrete screw pile, including a hollow concrete barrel, inside of which a hollow profile metal pipe is coaxially located, entwined with structural reinforcement and made with the possibility of installing an internal key for twisting in its cavity, while the terminal part of the pile contains a drill metal coil.

Description

The utility model relates to the field of construction, namely to the elements of the foundation of buildings, power transmission towers, contact network towers, cell towers, fences, anchors, in the supports of temporary bridges, pipelines, moorings, etc.

The prior art design of screw piles.

A known construction of reinforced concrete piles, which has a concrete layer with a cylindrical pipe inside, with screw threads at the end of the pile and transverse crossbars made inside the pipe (US Patent No. 5188485, published 02.23.1993).

The disadvantage of this design is its lack of strength due to the presence of crossbars inside the pipe, which do not provide a uniform distribution of the external load when the pile is immersed in the ground. Also, the complex construction of the pile does not allow to obtain a highly reliable product, which is reflected in a decrease in the service life of both the structure itself and those objects that use the pile as an element of the foundation.

From the description of the patent of the Russian Federation No. 83078 (published on 05/20/2009), a prefabricated reinforced concrete boring screw pile consisting of a reinforced concrete barrel of variable cross section with a reinforcing cage of longitudinal rods and transverse winding reinforcement fixed on the side surface of the barrel of the spiral winding and loosening tip is known for In this case, the reinforced concrete trunk of the pile has the shape of a rotation paraboloid, and the screw winding on the lateral surface of the trunk is pre-stressed continuous or intermittent with a variable pitch in correspondence with the distribution of forces in the trunk arising from screwing the piles into the ground, and is fixed on the longitudinal stem of the reinforcing cage of the reinforced concrete trunk, and screw winding on the side surface of the trunk is made in the direction opposite to the transverse winding of the reinforcement cage of the reinforced concrete trunk. The pile shaft is made of concrete of class B 25.

The complex construction of piles associated with obtaining a trunk with the shape of a paraboloid of rotation, as well as performing variable pitch helical windings, increases the complexity of its manufacture. At the same time, sufficient structural strength is not ensured due to the uneven force due to the removal of the point of application of force for screwing (the upper ground part of the structure) and the part of the structure screwed into the ground, which ultimately does not allow to obtain a reliable product that can withstand external load.

The closest analogue to the patented design of a concrete screw pile for twisting with an internal screw wrench is a reinforced concrete screw pile containing a metal pipe twisted in a spiral by structural reinforcement and having holes on the side surface of the ground part of the pile for screwing it into the ground (RF patent No. 114693, published 24.11. .2011).

To screw the indicated pile through the holes located on the side surface of the ground part of the pile? pass the beam, then for the free ends of the beam when moving in a circle, screw the piles into the ground. To rotate the beam in a circle, the attraction of labor is required.

The indicated design of the pile is inconvenient to use, since it requires the use of additional labor. Piling in this case occurs at a low speed, which leads to an increase in the complexity of its installation. Also, the specified pile is covered with a material based on powder paint in order to avoid rotting, which is erased when the pile is twisted into the ground, which does not provide the necessary reliability of the product. In addition, the design of the pile and the method of its installation are considered. In addition, the considered design of the piles does not allow to provide the necessary strength and reliability due to the unevenness of the forces due to the removal of the point of application of force from the screwed part of the structure.

The objective of the utility model is to obtain a simple design of a concrete screw pile, reducing the complexity of its installation in the ground.

The technical result of the utility model is to increase the reliability of the construction of a concrete screw pile by ensuring uniformity of the applied forces when screwing the pile into the ground.

The claimed technical result is achieved through the use of the construction of a concrete screw pile, including a hollow concrete barrel, inside of which a hollow profile metal pipe is coaxially located, entwined with structural reinforcement and made with the possibility of installing an internal key for twisting in its cavity, while the terminal part of the pile contains a drill metal coil.

A drilling turn means a turn by means of which the process of deepening a concrete screw pile into the ground is started.

Additionally, for twisting into the ground, a hollow shaft made of concrete on the lateral surface of its end part may contain a screw with concrete blades, which are performed in the continuation of the metal drill loop, which also increases the bearing characteristics of the piles.

A hollow barrel made of concrete can be made with a through cavity.

In addition, a profile metal pipe, a cavity inside it, an internal key for twisting can be made of rectangular cross-section.

The presence of a hollow shaped metal pipe, made with the possibility of installing an internal key for twisting in its cavity, allows you to maximally approximate the point of application of the force for twisting the pile into the ground to the screwed part of the pile structure - its end part, which allows you to evenly and precisely distribute the applied forces only to the specified lower part of the structure, thereby reducing the load from the upper part of the pile shaft, providing increased strength and reliability of the structure and its installation. The presence of an external concrete shell makes it possible to withstand the increased loads exerted on the lower screw-in part of the structure, and also during operation eliminates the interaction of a hollow shaped metal pipe with groundwater, thereby protecting it from corrosion and, as a whole, contributing to an increase in the strength of the structure, its reliability during installation and further use. Pouring concrete into the cavity of a hollow shaped metal pipe after removing an internal key for twisting from it also increases the strength of the pipe, eliminates the ingress of water and precipitation, preventing it from being crushed during frost.

It should also be noted that the use of a concrete shell and an internal key for twisting, which take up the maximum part of the external load during the installation of the pile, allows the hollow profile metal pipe to be thin-walled, which helps to reduce the metal consumption and generally makes the solution economical.

In FIG. 1 shows a general view of a concrete screw pile without installing an internal twist key; FIG. 2 is a general view of a hollow metal profile pipe with fittings; FIG. 3 is a general view of the internal key for twisting; FIG. 4 is a general view of a concrete screw pile with an installed internal key for twisting.

The pile contains a hollow barrel 1 of concrete, inside of the cavity of which a hollow metal profile pipe 2 is placed, twisted in a spiral by structural reinforcement 3. The pipe 2 can be made of rectangular cross-section and may also have a cavity of rectangular cross-section. At the end of the end of the shaft 1 of the pile is a metal drill coil 4, which is the first coil that cuts through the soil when deepening the pile. On the lateral surface of the end part of the barrel 1, which enters the ground, a screw 5 can be located with concrete blades 6, made in one piece with the barrel 1 and which are a continuation of the metal drill coil 4. The internal key 7 for twisting the piles can be made of a rectangular metal profile section, the length of which should be not less than the length (height) of the pile, at one end of which the head 7 is perpendicularly welded.

Also, the cavity inside the hollow metal pipe 2 and the internal key 7 for twisting the piles can have a cross section in the form of a polygon (for example, a hexagon, etc.). The main requirement here is the coincidence of the cross-sectional shape of these elements, as well as their sizes so that the key 7 can engage with the cavity of the pipe 2 in order to obtain an integral connection between the pile and the key 7, followed by screwing the pile into the ground.

The internal key 7 for twisting can be twisted by means of automated devices, which eliminates the attraction of additional labor and reduces the complexity of installing piles in the ground.

The internal key 7 for the twist is reusable and is made of highly alloyed steel or composite material that is well resistant to torsion.

Installation of piles is as follows.

A pit is prepared, usually conical in shape. In the cavity of the pile, inside and longitudinally of the metal profile pipe 2, an internal twist key 7 is installed with a head 8, the size of which exceeds the width (diameter) of the metal profile pipe 2. After that, the pile is lifted and installed perpendicular to the pit. Then they rotate the head 8 of the key 7, while the soil is erupted, first with a metal drill coil 4, and then with concrete blades 6 of the screw 5, if any, and a pile deepening. After that, the internal key 7 for twisting is removed from the cavity of the hollow metal profile pipe 2, the specified cavity is poured with concrete, and the pit is sealed with soil.

The inventive design of a concrete screw pile and the method of its installation are simple to use, they allow to obtain a reliable and economical product with increased service life.

Claims (7)

1. Concrete screw pile, characterized in that it contains a hollow barrel made of concrete, inside of which a hollow profile metal pipe is coaxially located, entwined with structural reinforcement and made with the possibility of installing an internal key for twisting into its cavity, while the terminal part of the pile contains a drill turn, made of metal. 2. A concrete screw pile according to claim 1, characterized in that the hollow concrete barrel on the lateral surface of its terminal part contains an auger with concrete blades, which are carried out in the continuation of the metal drill loop. 3. A concrete screw pile according to claim 1, characterized in that the hollow barrel of concrete is made with a through cavity. 4. Concrete screw pile according to claim 1, characterized in that the hollow profile metal pipe is made of rectangular cross-section. 5. Concrete screw pile according to claim 1, characterized in that the cavity of the hollow shaped metal pipe is made of rectangular cross-section. 6. Concrete screw pile according to claim 1, characterized in that the internal key for twisting is made of rectangular cross-section. 7. Concrete screw pile according to claim 1, characterized in that the hollow shaped metal pipe is made of spiral reinforced structural reinforcement.

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