RU2641142C1 - Long-dimensional pipe concrete element - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: long-dimensional pipe concrete element containing a concrete core and reinforcement in the form of a closed outer shell having radial holes is proposed. According to the invention, of new is that the shell is designed as a steel pipe across the length of the element and is equipped with an external protective coating being capable of preventing the concrete mixture from escaping from the shell holes during the core concreting without using a removable formwork. In addition, the holes may be of different shapes and with different arrangements with respect to the longitudinal axis of the element for perceiving the effective loads and efficient joint operation of the concrete core and the steel shell.

EFFECT: increased efficiency of the construction of the long-dimensional pipe concrete element and the technology of its erection, improved performance and expanded field of use.

18 cl, 24 dwg

Description

The invention relates to the field of construction and can be used for the manufacture of bearing and non-bearing elements of building structures, mainly rod (columns, pylons, beams, braces of trusses, etc.).

A known supporting concrete pipe construction of the column, erected according to the known technology, containing a metal pipe filled with stage-by-stage compressed concrete forming the inner core, an elastic cylinder is coaxially installed in the metal pipe until it is filled with concrete using clamps, and the cavity between the pipe and cylinder is coaxially installed concrete is supplied, after which a removable clamp is installed on top of the pipe with the help of jacks, and overpressure is applied to the elastic cylinder, spos the compression and reduction of shrinkage deformation of concrete, when concrete reaches a strength of at least 30%, the elastic cylinder is removed, and the cavity formed is filled with concrete on expanding cement to create additional pressure and increase the physicomechanical characteristics of the concrete core and concrete structure (RF patent No. 2402662 C1, priority date 04.08.2009, publication date 10.27.2010, authors: Afanasyev A.A., Kurochkin A.V., RU).

The disadvantages of the known pipe-concrete structure are significant labor costs and long construction periods due to the phased concreting of the core.

A known construction of a steel-reinforced concrete column, consisting of steel pipes, a concrete core and a separating layer in the form of a special mastic, for example a thin layer of bitumen, located between the inner surface of the steel pipe and the concrete core to ensure viscous slipping of the concrete core, while the steel pipe is not connected to the concrete core (US patent No. US 5012622 (A), priority date 03/30/1990, publication date 05/05/1991, authors: Takanori Sato et al., JP)

The disadvantages of the analogue are: firstly, low bearing capacity due to the lack of joint work of the shell in the form of a steel pipe and reinforced concrete core along the entire length of the element; secondly, the complexity of manufacturing due to the need to form a separation layer between the steel pipe and the concrete core.

A known column containing a metal pipe with a concrete core inside and a separation layer between them, which is a plastic film (RF patent No. 2099488 C1, priority date 05/15/1995, publication date 12/20/1997, authors: Merkin V.E. et al., RU).

The disadvantages of this analogue are: low bearing capacity of the column, made in the form of a concrete structure, due to the lack of joint work of the concrete core and metal pipe, as well as a limited area of use.

Pipe-concrete structures are known in which, to ensure the joint operation of the concrete core and the metal pipe, as well as to increase the load-bearing capacity of the structure, anchors are fixed inside the pipe before filling it with concrete mixes in the holes made in the pipe in mutually perpendicular directions (RF patent No. 2417290 C1, priority date 03.24.2010, publication date 04/27/2011, authors: Afanasyev A.A., Kurochkin A.V., RU; patent of the Russian Federation No. 2420636 C1, priority date 07.12.2009, publication date 10.06.2011, authors: Afanasyev A.A., Kurochkin A.V., RU).

A disadvantage of the known analogues is the complexity of the anchor devices.

As a prototype, a well-known reinforced concrete compressed element of the column type containing indirect reinforcement in the form of a closed outer shell consisting of several separate sections having radial openings, each shell section made of plastic, is adopted (RF Patent No. 21511247 C1, priority date 05.08.1998, publication date 06/20/2000, authors: Utkin BC, Borisov I.A., RU, prototype).

The disadvantages of the prototype are: low performance design due to the technical and operational characteristics of the plastic shell, limited area of use and inefficient construction technology, due to the following reasons:

- firstly, the shell material is low-strength, brittle, with a high degree of combustibility, emits toxic gases in case of fire, subject to aging, having low anti-vandal resistance and low bearing capacity;

- secondly, the use of this device is possible only as columns;

- thirdly, the need to use removable formwork when filling the concrete mixture of the element and ensuring the sealing of the holes.

The technical problem solved by the invention is the creation of a long-length steel-concrete element, both bearing and non-bearing, in the form of a pipe-concrete structure with high bearing capacity and effective construction technology; with the use of a more efficient shell material with greater strength, less brittleness, greater design resistance, no fire susceptibility, eliminating the formation of toxic fumes in the event of fire, with a low degree of aging of the material and high vandal resistance; with the expansion of the scope of use, including as columns, pylons, beams, braces of farms, etc .; as well as ensuring the sealing of openings for effective filling with concrete mixture of the shell with holes without the use of removable formwork.

To solve a technical problem, a long-length pipe-concrete element is proposed containing a concrete core and reinforcement in the form of a closed outer shell having radial openings. According to the invention, it is new that the shell is made in the form of a steel pipe along the entire length of the element and is provided with an external protective coating that is configured to prevent concrete from escaping from the holes of the shell when concreting the core.

According to the invention, the holes in the shell are made in longitudinal and transverse rows.

According to the invention, the holes in the shell are made either round, or square, or rectangular, or oval, or conical in shape.

According to the invention, the holes of round or conical shape made on the inside of the shell may not be through.

According to the invention, the holes are rectangular or oval in shape with an elongated axis in the longitudinal or transverse directions.

According to the invention, the holes of a rectangular or oval shape are located with an inclined elongated axis with respect to the longitudinal axis of the element.

According to the invention, the holes of rectangular or oval shape are arranged in V-shaped rows with an inclined elongated axis with respect to the longitudinal axis of the element.

According to the invention, the holes in the body of the shell of one row are made larger in relation to the holes of the adjacent row.

According to the invention, a long-length pipe-concrete element contains studs installed in diametrically located shell openings in rows at different levels and in mutually perpendicular directions, the studs being provided with threaded ends with distribution washers pressed against the shell surface by nuts.

According to the invention, the distribution washers are made either with a curved concave supporting surface corresponding to the outer surface of the element, or with a flat supporting surface interacting with the surface of the diametrically located grooves made on the shell.

According to the invention, a long-length pipe-concrete element contains reinforcing bars installed in diametrically located shell openings, in rows at different levels and in mutually perpendicular directions, as well as with or without outlets, the ends of the rods being rigidly bonded to the shell by means of welded joints.

According to the invention, a long pipe element contains joints formed by welded joints of the machined ends of the shell.

According to the invention, the joints are provided with an additional reinforcing layer.

According to the invention, a long-length pipe-concrete element contains reinforcing rods installed in the holes of the shell in certain places, fixed in the body of the element and having bilateral or unilateral outlets, which are anchor outlets for fixing any structural elements.

According to the invention, the external protective coating can be made either of a sealing material, or of a material having anticorrosion properties and / or refractory properties and / or adhesive properties, with the possibility of applying an external additional coating with increased strength properties that increase the bearing capacity of the element, increasing local stability of the shell and providing strength of the shell at the joints.

According to the invention, the outer protective coating is formed by either polyethylene, or carbon fiber, or refractory material, or scotch tape, or composite material, or leather, or rubber.

According to the invention, the concrete core is formed by either non-shrinking fine-grained concrete mixture, or self-tensioning fine-grained concrete, or fine-grained fiber-reinforced concrete.

According to the invention, in the shell there are technological holes provided with a plug arranged with a certain pitch and diameter for supplying concrete mixture through them, as well as with the possibility of installing inside the shell through the indicated holes of the vibrator to compact the concrete mixture in the process of concreting.

The invention is illustrated by drawings, where:

- in FIG. 1 schematically shows a long pipe element, General view;

- in FIG. 2 - a section of a long pipe element with square holes;

- in FIG. 3 - a section of a long pipe element with rectangular holes elongated along the element;

- in FIG. 4 - a section of a long pipe element with rectangular holes elongated in the transverse direction;

- in FIG. 5 - a section of a long pipe element with oval holes elongated in the longitudinal direction;

- in FIG. 6 - a fragment of the shell with internal conical through holes;

- in FIG. 7 - a section of a long pipe element with oval shaped holes located with an inclined elongated axis with respect to the longitudinal axis of the element;

- in FIG. 8 is a section of a long pipe element with oval-shaped holes located in V-shaped rows with an inclined elongated axis with respect to the longitudinal axis of the element;

- in FIG. 9 - a section of a long pipe element with holes of different sizes in the body of the shell, and the holes of one row are made larger in relation to the holes of the neighboring row and are staggered;

- in FIG. 10 - the same, with holes of different shapes;

- in FIG. 11 is a long pipe element containing studs installed in diametrically located shell openings, in rows at different levels and in mutually perpendicular directions, general view;

- in FIG. 12 is a cross-sectional view of the element of FIG. eleven;

- in FIG. 13 - node A in FIG. 12;

- in FIG. 14 shows a distribution washer with a curved concave supporting surface corresponding to the outer surface of the element;

- in FIG. 15 is a cross-sectional view of the element of FIG. 11, in the embodiment with a flat distribution washer;

- in FIG. 16 - node B in FIG. fifteen;

- in FIG. 17 is a cross-sectional view of a long-length pipe-concrete element, with reinforcing rods installed with outlets in diametrically located shell openings, in rows at different levels and in mutually perpendicular directions, the ends of which are rigidly fastened to the shell by means of welded joints;

- in FIG. 18 is a cross-sectional view of a long-length pipe-concrete element with reinforcing bars installed without outlets in diametrically located shell openings, in rows at different levels and in mutually perpendicular directions, the ends of which are rigidly fastened to the shell by means of welded joints;

- in FIG. 19 is a section of a lengthy pipe-concrete element joined by a welded joint of the ends of the shell;

- in FIG. 20 is a cross-sectional view of a long-length pipe-concrete element with reinforcing bars installed in the holes of the shell in certain places, fixed in the body of the element and having bilateral outlets, which are anchor outlets for fixing any structural elements;

- in FIG. 21 is a cross-sectional view of a long-length pipe-concrete element with reinforcing bars installed in the holes of the shell in certain places, fixed in the body of the element and having single-sided outlets that are anchor outlets for fixing any structural elements;

- in FIG. 22 is a longitudinal section in FIG. 21;

- in FIG. 23 schematically depicts a long pipe element with technological holes for supplying concrete mixture to the boundaries of the concrete zones with the immersed tip of the vibrator;

- in FIG. 24 schematically depicts a long pipe element with technological holes and the boundaries of the areas of concreting.

Moreover, in FIG. 2 - FIG. 10 the concrete core and the outer protective coating are not conventionally shown.

A long-length pipe-concrete element, made, for example, in the form of a column, contains a concrete core 1, a closed outer shell 2 in the form of a steel pipe along the entire length of the element having an external protective coating 3 and radial holes 4 with dowels 5 formed in them during concreting (Fig. one).

The external protective coating 3 of the steel pipe can be made of either a sealing material, or of a material having anticorrosion properties and / or refractory properties and / or adhesive properties, with the possibility of applying an external additional coating with increased strength properties that increase the bearing capacity of the element, increasing local stability of the shell and providing strength of the shell at the joints. Depending on the operating conditions, materials such as, for example, polyethylene, carbon fiber, refractory material, adhesive tape, leather, rubber, and also composite materials can be used as a protective coating. Along with the protective function, the outer coating 3 also prevents the outflow of concrete during the formation of the concrete core 1 and keys 5.

The radial holes 4 in the shell 2 are made in longitudinal and transverse rows, forming perforated sections for the formation of dowels 5, ensuring the joint operation of the concrete core 1 and the shell 2. The holes 4 can be of different shapes depending on the nature of the load and working conditions. In particular, the holes can be square (Fig. 2), rectangular with an elongated axis along the shell of the element (Fig. 3) and with an elongated axis across the shell of the element (Fig. 4), oval (Fig. 5), conical through holes made on the inner side of the shell (Fig. 6), oval with an inclined elongated axis with respect to the longitudinal axis of the element (Fig. 7), oval, arranged in V-shaped rows with an inclined elongated axis with respect to the longitudinal axis of the element (Fig. 8), holes of one row may be larger in relation to the hole the adjacent row of pits (Fig. 9), as well as different shapes (FIG. 10) and may be staggered. In this case, the holes 4 with an elongated axis in the shell, as shown, for example, in FIG. 5, help to reduce the stress concentration in the dowels 5 (not shown conditionally), and holes 4 with an inclined axis relative to the longitudinal axis of the element, as shown in FIG. 7 and FIG. 8, contribute to the perception of significant torque, since the dowels in these holes work on twisting.

To increase local stability and joint work of the concrete core and the steel shell of a long-length pipe-concrete element, studs 7 with threaded ends can be installed on diametrically located holes 6 of the shell at different levels and in mutually perpendicular directions, on which there are distribution washers 8 or 9, tightly pressed to the shell 2 with nuts 10 (Fig. 11 - Fig. 16). In this case, the distribution washers 8, 9 for tightly pressing against the surface of the shell in the tightening nodes are made either with a concave supporting face 11 adjacent to the shell, the bending radius of which is equal to the radius of the outer diameter of the shell 2 (Fig. 12 - Fig. 14), or with a flat supporting a face adjacent to the flat surface of the grooves 12 made on the shell with a diametrical and parallel arrangement of the flat surfaces of the grooves 12 (Fig. 15, Fig. 16).

The local stability of the element and the joint work of the concrete core 1 and the steel shell 2 can also be enhanced by reinforcing rods 13 installed with or without outlets in diametrically located shell openings, in rows at different levels and in mutually perpendicular directions, the ends of which are rigidly fixed to sheath by means of welded joints. In this case, the reinforcing bars 13 can have outlets (Fig. 17) or can be welded "flush" into the countersink hole (Fig. 18).

The length of the lengthy pipe-concrete element may have joints 14 made by welding the pre-treated ends of the shell (Fig. 19). To increase the strength of the joints 14, their adjacent sections can be provided with an additional coating with composite materials (not shown conditionally).

Reinforcing straight lines 15 (Fig. 20) or curved 16 (Fig. 21, Fig. 22) rods fixed in the body of the concrete core and having bilateral or unilateral outlets, which are anchor outlets for fixing any or structural elements.

For concreting of a long-length pipe-concrete element in a steel shell 2, technological holes 17 are provided with plugs 18. Moreover, the holes 17 are made with the possibility of supplying concrete mixture and a vibrator tip 19 through them (Fig. 23).

For the efficient formation of concrete core 1 and keys 5 using the concreting technology shown in FIG. 24, either non-shrinking fine-grained concrete mixture, or self-tensioning fine-grained concrete, or fine-grained fiber-reinforced concrete can be used.

The specified concrete mixture when concreting penetrates the holes 4 and, passing through them, can slightly deform the outer protective coating 3 and harden, excluding the leakage of the concrete mixture. In this case, the protective coating 3 performs the function of formwork.

For the manufacture of a long-length pipe-concrete element, the technique shown in FIG. 23 and FIG. 24, according to which, the concrete mixture supplied for monolithic erection is supplied under pressure to the sealed casing 2 through the technological hole 17 located in the lower part of the casing, rises under pressure up to a certain design height that defines the boundary of the first concreting section, over which the next unsealed technological hole 17 (the boundary of the 1st concreting section), and begins to flow out of it (Fig. 24). In this case, the supply of concrete mixture is stopped, the lower hole 17 is closed with a plug 18, and the concrete mixture is vibrated if necessary by immersion of the tip of the vibrator 19 through the upper technological hole 17, as shown in FIG. 23. Next, proceed to concreting the next upstream section.

The technical result achieved by the invention is to increase the efficiency of the design of a long-length pipe-concrete element and the technology of its construction, to improve performance and expand the field of use, and is achieved through the use of a more effective shell material with greater strength, less brittleness, greater design resistance, non-susceptibility ignition that does not form toxic fumes in case of fire, with a low degree of aging of the material and high vandal resistance; due to the possible use as columns, pylons, beams, trusses of trusses, etc., and also due to the provision of sealing the holes with a protective coating to effectively fill the concrete with holes without using removable formwork.

At the same time, the advantages of the claimed long-length pipe-concrete element providing the indicated technical result are due to the use of steel pipes with an external protective coating as a shell with radial holes, which excludes the exit of the concrete mixture from the holes during concreting.

Claims (18)

1. A long-length pipe-concrete element containing a concrete core and reinforcement in the form of a closed outer shell having radial holes, characterized in that the shell is made in the form of a steel pipe along the entire length of the element and is provided with an external protective coating that is configured to prevent concrete from escaping from the shell openings when concreting the core. 2. A long pipe element according to claim 1, characterized in that the holes in the shell are made in longitudinal and transverse rows. 3. A long-length pipe-concrete element according to claim 1, characterized in that the holes in the shell are made either round, or square, or rectangular, or oval, or conical in shape. 4. A long-length pipe-concrete element according to claim 3, characterized in that the holes of a round or conical shape made on the inside of the shell may not be through. 5. A long pipe element according to claim 3, characterized in that the holes of a rectangular or oval shape are arranged with an elongated axis in the longitudinal or transverse directions. 6. The long pipe element according to claim 3, characterized in that the holes of a rectangular or oval shape are located with an inclined elongated axis with respect to the longitudinal axis of the element. 7. The lengthy pipe-concrete element according to claim 3, characterized in that the holes of rectangular or oval shape are arranged in V-shaped rows with an inclined elongated axis with respect to the longitudinal axis of the element. 8. The long pipe element according to claim 1, characterized in that the holes in the body of the shell of one row are made larger in relation to the holes of the adjacent row. 9. The long pipe element according to claim 1, characterized in that it comprises studs installed in diametrically located shell openings in rows at different levels and in mutually perpendicular directions, the studs being provided with threaded ends with distribution washers pressed against the shell surface mounted on threaded ends with nuts. 10. A long-length pipe-concrete element according to claim 9, characterized in that the distribution washers are made either with a curved concave supporting surface corresponding to the outer surface of the element or with a flat supporting surface interacting with the surface of diametrically located grooves made on the shell. 11. A long-length pipe-concrete element according to claim 1, characterized in that it contains reinforcing bars installed in diametrically located shell openings in rows at different levels and in mutually perpendicular directions, as well as with or without outlets, the ends of the rods being rigidly fastened to the shell through welded joints. 12. The long pipe element according to claim 1, characterized in that it contains joints formed by welded joints of the processed ends of the shell. 13. The long pipe element according to claim 12, characterized in that the joints are provided with an additional reinforcing layer. 14. A long-length pipe-concrete element according to claim 1, characterized in that it contains reinforcing bars installed in the holes of the shell in certain places, fixed in the body of the element and having bilateral or unilateral outlets, which are anchor outlets for fixing any structural elements. 15. A long-length pipe-concrete element according to claim 1, characterized in that the external protective coating can be made either of a sealing material, or of a material having anticorrosive properties and / or refractory properties and / or adhesive properties, with the possibility of applying an external additional coatings with increased strength properties that increase the bearing capacity of the element, increase the local stability of the shell and provide strength of the shell at the joints. 16. The lengthy pipe-concrete element according to claim 15, characterized in that the external protective coating is formed either by polyethylene, or carbon fiber, or refractory material, or scotch tape, or composite material, or leather, or rubber. 17. A long-length pipe-concrete element according to claim 1, characterized in that the concrete core is formed either by a non-shrinking fine-grained concrete mixture, or by self-tensioning fine-grained concrete, or fine-grained fiber-reinforced concrete. 18. A long-length pipe-concrete element according to claim 1, characterized in that the casing has technological holes provided with a plug arranged with a certain pitch and diameter for supplying concrete mixture through them, as well as with the possibility of installing inside the casing through these openings of the vibrator for compaction concrete mix in the process of concreting.

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