CN113123525B - Corrosion-resistant concrete beam skeleton and manufacturing method - Google Patents

Abstract

A corrosion-resistant concrete beam skeleton and a manufacturing method. The bracket comprises two struts, each of which is staggered and connected to the same staggered point. The longitudinal bars are made of composite materials. One end of the support rod; there are a plurality of supports, and each longitudinal bar is circumferentially arranged around the central axis of each staggered point; strand hoop, each longitudinal bar is passed through a strand hoop, and the strand hoop faces the central axis Each longitudinal rib is locked, and a plurality of stranded wire hoops are arranged at intervals along the central axis. By using the stranded wire hoop of corrosion-resistant material to replace the traditional ordinary steel stirrup, the corrosion resistance is greatly improved, so that the seawater and sea sand can be fully utilized, and the expansion of the ordinary steel bar when the corrosion is serious, resulting in the expansion of the concrete protective layer cracking or even falling off. At the same time, the method of first installing the stranded wire hoop and the longitudinal bars together, finally installing the bracket, and then propping up the bracket, can tighten the stranded wire hoop on the longitudinal bars, and the installation method is more convenient and flexible.

Description

Corrosion-resistant concrete beam skeleton and manufacturing method

technical field

The invention belongs to the technical field of construction, and in particular relates to a corrosion-resistant concrete beam skeleton and a manufacturing method.

Background technique

my country is a big country in concrete production and consumption. With the development of China's economic construction, the demand for construction sand has also increased year by year. River sand, as the main source of sand for construction, has been exploited excessively and improperly, resulting in serious damage to the riverbed, water resources environment and ecological environment of many river basins in the country. Coupled with the lack of river sand resources in China's coastal areas, people have to turn their attention to other sand and gravel resources.

Seawater sea sand concrete refers to the concrete material in which the mixing water is sea water and the fine aggregate is untreated sea sand. The sea sand has low mud content, good particle size and uniform fineness, and can be used to formulate concrete. China has a coastline of 18,000 kilometers and an overall sand body area of 342,000 square kilometers. Only the continental shelf of the East China Sea is dominated by fine sand, with a total resource of 22.8×10 ¹⁰ cubic meters. The use of sea sand instead of river sand in coastal structures can not only reduce transportation costs and lower prices, but also reduce damage to the river environment. When concrete is used, it will be applied to the concrete beam frame. The traditional concrete beam frame is made of ordinary steel bars. However, the large amount of chloride ions contained in sea sand and seawater will accelerate the corrosion of ordinary steel bars. When the corrosion of ordinary steel bars is serious It will expand, causing the concrete protective layer to burst or even fall off.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present application is to provide a corrosion-resistant concrete beam skeleton and a manufacturing method, aiming to solve the problem that common steel bars are not corrosion-resistant.

To achieve the above object, the technical scheme adopted in the present application is: a corrosion-resistant concrete beam skeleton is provided, including:

The bracket includes at least two support rods and clamps respectively arranged at the ends of the support rods. Ends;

The longitudinal ribs are made of composite materials, the number of the longitudinal ribs is multiple, the axial directions of the longitudinal ribs are arranged in the same direction, and the longitudinal ribs are respectively clamped on the corresponding clamps; the There are a plurality of brackets, each of the brackets is arranged at intervals along the axial direction of the longitudinal ribs, and each of the longitudinal ribs is circumferentially arranged around the central axis of each of the staggered points; and

Stranded wire hoop, made of corrosion-resistant material, each longitudinal rib passes through the stranded wire hoop, and the stranded wire hoop locks each of the longitudinal ribs toward the central axis, and the A plurality of stranded wire hoops are arranged at intervals along the central axis, the stranded wire hoops include stainless steel stranded wires and a connection block, and the connection blocks fasten and connect two ends of the stainless steel stranded wire, and the stainless steel stranded wire One end of the wire is connected to the connecting block through an adjustable structure;

Wherein, by adjusting the size of the stranded wire hoop, or the size of the support, or simultaneously adjusting the size of the stranded wire hoop and the size of the support, it can be adapted to different concrete beams.

In one embodiment, the connecting block is a connecting block made of aluminum material.

In one embodiment, the bracket further includes a hinge through which each of the struts is hinged.

In one embodiment, the support rod includes a sleeve and a telescopic pipe; the telescopic pipe is telescopically arranged on the sleeve; there are two telescopic pipes, and two telescopic pipes are telescopically disposed in the telescopic pipe. the two ends of the sleeve; the free ends of the two telescopic tubes are provided with the clamps.

In one embodiment, the clamp is rotatably connected to one end of the telescopic tube.

In one embodiment, one end of the clamp is provided with an end cap, the end cap is capped on the end face of the telescopic tube, and the end cap is rotatably connected to the end face of the telescopic tube.

In one embodiment, scale values of length and angle are marked on the outer wall of the telescopic tube and/or the sleeve.

A method for making a corrosion-resistant concrete beam skeleton, comprising the following steps:

A. Cut the stainless steel stranded wire to the required length, and then connect the two ends of the stainless steel stranded wire to form a stranded wire hoop, and make several stranded wire hoops of equal size according to the number required ;

B. Pass the four longitudinal bars through each of the stranded wire hoops, respectively, and touch the four corners of each of the stranded wire hoops, and then fix the stranded wire hoops on the on longitudinal tendons

C. Put at least two of the brackets between the four longitudinal ribs at intervals, wherein two of the brackets are located at both ends of the four longitudinal ribs, and the four longitudinal ribs are respectively connected to the brackets. Four end connections;

D. Spread the support, and adjust the support and/or the stranded wire hoop according to the required cross-sectional size of the concrete beam;

E. Adjust the position of each stranded wire hoops to ensure that the stranded wire hoops on each surface are perpendicular to the longitudinal bars, and that the multiple stranded wire hoops are just in a tight state.

The beneficial effects of the present application are: by using the stranded wire hoop of corrosion-resistant material to replace the traditional ordinary steel stirrup, the corrosion resistance is greatly improved, so that seawater and sea sand can be fully utilized, and the expansion of ordinary steel bars when the corrosion is serious is avoided. , resulting in the problem of cracking or even falling off of the concrete protective layer. At the same time, the method of first installing the stranded wire hoop and the longitudinal reinforcement together, and finally installing the bracket, and then propping up the bracket, can tighten the rusted steel stranded wire hoop on the longitudinal reinforcement, and the installation method is more convenient and flexible.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present application. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a perspective view of an embodiment of the application;

Fig. 2 is the perspective view of the bracket in the embodiment of the application;

3 is a perspective view of a clamp in an embodiment of the application;

4 is a schematic diagram of step A in the embodiment of the present application;

5 is a schematic diagram of step B in the embodiment of the present application;

FIG. 6 is a schematic diagram of steps C-E in an embodiment of the present application.

Among them, each reference sign in the figure:

10. Stranded wire hoop 11. Stainless steel stranded wire

12. Connection block 101. Corner

20. Longitudinal ribs 30. Bracket

31, strut 311, casing

312, telescopic tube 313, clamp

314, nut 32, hinge.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

It is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the application and simplifying the description, rather than indicating or implying the indicated A device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

Please refer to FIG. 1 and FIG. 3, an embodiment of the present application provides a corrosion-resistant concrete beam skeleton, including:

The bracket 30 includes at least two struts 31 , and each of the struts 31 is staggered and connected to the same staggered point; optionally, there are two struts 31 , and the two struts 31 are staggered to form an X shape. Of course, the number of the struts 31 is not limited, and may also be three, four or more. And the bracket 30 is made of corrosion-resistant material, such as stainless steel.

The longitudinal ribs 20 are made of composite materials, the number of the longitudinal ribs 20 is multiple, the axial directions of the longitudinal ribs 20 are arranged in the same direction, and the longitudinal ribs 20 are respectively connected to the support rods 31 in sequence. There are a plurality of the brackets 30, each of the brackets 30 is arranged at intervals along the axial direction of the longitudinal ribs 20, and each of the longitudinal ribs 20 is circumferentially arranged around the central axis of each of the staggered points.

Optionally, the longitudinal ribs 20 are made of FRP material, and FRP (Fiber Reinforced Polymer/Plastic) refers to a high-performance material formed by mixing a fiber material and a matrix material in a certain proportion. Longitudinal bars 20 are used to replace traditional steel bars. Because of its light weight, high strength and corrosion resistance, FRP material can solve the problem of poor durability caused by easy corrosion of steel bars.

The stranded wire hoop 10 is made of corrosion-resistant material, each of the longitudinal ribs 20 is passed through the stranded wire hoop 10, and the stranded wire hoop 10 locks each of the longitudinal ribs toward the central axis 20, and a plurality of the stranded wire hoop 10 are arranged at intervals along the central axis. By using the stranded wire hoop made of corrosion-resistant materials, compared with the traditional ordinary steel hoop, its corrosion resistance is greatly improved, so that seawater and sea sand can be fully utilized, and the expansion of ordinary steel bars when the corrosion is serious is avoided, resulting in concrete protection. The problem that the layer is bursting or even falling off.

Optionally, the stranded wire hoop 10 is made of stainless steel, for example, 316 stainless steel. The use of stainless steel strands replaces the traditional ordinary steel stirrups, which greatly improves the corrosion resistance of the skeleton. In the prior art, other corrosion-resistant materials are also used to make the hoop, for example, FRP mesh cloth, but during the construction of the FRP mesh cloth, a traction fixture is required to wrap the entire FRP mesh cloth on the longitudinal bars 20, resulting in construction. It is inconvenient, and stainless steel strand is more convenient to construct than FRP mesh. For another example, FRP bar hoop, however, the manufacturing process of FRP bar hoop is complicated, and the tensile strength of the bending point is low, and the strength of the bending point is 40% of the strength of the material itself, resulting in a low shear strength of the beam, and The tensile strength at the bend of the stranded wire hoop 10 made of stainless steel is higher than that of the FRP bar hoop at the bend, thereby improving the shear resistance.

The brackets 30 are stretched, and the plurality of stranded wire hoops 10 are tightened on the outer peripheral sides of the four composite longitudinal bars 20, thereby forming a complete concrete beam skeleton. The skeleton is easy to assemble, and the same set of skeletons adapts to many cross-section sizes of beams. It has the characteristics of simple construction and strong adaptability. After assembly, it is no different from the traditional reinforced concrete beam skeleton pouring construction operation, and it is suitable for different site conditions. The number of the brackets 30 is selected according to the situation. When the number of the brackets 30 is two, the two brackets 30 are located at the two ends of the longitudinal bars 20 respectively.

In one embodiment, the stranded wire hoop 10 includes a stainless steel stranded wire 11 and a connecting block 12 , and the connecting block 12 fastens and connects two ends of the stainless steel stranded wire 11 . Optionally, the connecting block 12 is also made of stainless steel or metal aluminum. For example, the connecting block 12 is a connecting block made of aluminum, and both ends of the stainless steel stranded wire 11 are clamped on the aluminum buckle. Of course, one end of the stainless steel stranded wire 11 can also be connected to one end of the connection block 12 through an adjustable structure, and the size of the stranded wire hoop 10 can be adjusted selectively, or the size of the bracket 30 can be adjusted, or the size of the stranded wire hoop 10 can be adjusted at the same time. and bracket 30 size to fit different concrete beams.

In one embodiment, the stranded wire hoop 10 is fastened and connected to one of the longitudinal bars 20 through the guide buckle 40, so as to facilitate the subsequent adjustment of the position and angle of the stranded wire hoop 10 on the longitudinal rib 20. Of course, a stranded wire The hoop 10 is fastened and connected to the four longitudinal ribs 20 through a plurality of guide buckles 40 . Optionally, the guide buckle is a plastic buckle.

Optionally, the plurality of stranded wire hoops 10 can also be connected to the longitudinal bars 20 through other components, for example, the connection between the two is fastened with steel wires.

In one embodiment, in order to change the shape of the bracket 30, a bracket 30 with an adjustable shape and size is used. Optionally, the bracket 30 further includes a hinge 32; The two struts 31 are staggered from each other in an X-shape. The two rods 31 rotate with the hinge 32 as the base point. When adjusting the included angle of the two rods 31, first loosen the fastening of the two rods 31 by the hinge 32, and then adjust the two rods 31 according to different beam cross-sectional dimensions. The included angle between the two rods 31 is precisely adjusted, and the two rods 31 are fixed by tightening the hinge piece 32 to maintain the included angle between the two rods 31 . Optionally, the hinge member 32 is a screw or a shaft, and one end of the screw passes through the middle position of the two support rods 31 respectively, so that the two support rods 31 are connected and can be rotated around the shaft.

Optionally, each pole 31 includes a sleeve 311, a telescopic tube 312 and a clamp 313; There is a nut 314. One end of the nut 314 is connected to one end of the sleeve 311. Correspondingly, one end of the telescopic tube 312 is provided with a thread. The tubes 312 are fixedly connected together, and when the nut 314 is loosened, the expansion and contraction of the telescopic tube 312 on the sleeve 311 can be realized. During specific implementation, the two telescopic tubes 312 may adopt different telescopic lengths. Therefore, the same set of skeleton adapting beams has many cross-section sizes, and has the characteristics of simple construction and strong adaptability.

The clamp 313 is arranged on the end of the telescopic tube 312 away from the sleeve 311; optionally, the clamp 313 adopts a stainless steel belt clamp, the belt clamp has the feature of unidirectional self-locking, and the diameter of the belt clamp can be adjusted. It can be adapted to longitudinal ribs of different sizes within a certain range. Both ends of the longitudinal rib 20 are clamped on the corresponding clamps 313; there are two telescopic tubes 312, and the two telescopic tubes 312 are telescopically arranged on both ends of the sleeve 311, and the two telescopic tubes 312 are telescopic on the corresponding sleeve 311. The direction is the opposite. There are two clamps 313 , and the two clamps 313 are respectively disposed at one end of the two telescopic tubes 312 .

In one embodiment, the clamp 313 is rotatably connected to one end of the telescopic tube 312 . The clamp 313 and the telescopic tube 312 can be rotated independently, which ensures that the clamp 313 will not rotate with the telescopic tube 312, but is fixed on the plane of the longitudinal rib 20, so that the use is more convenient. Optionally, one end of the clamp 313 has an end cover 301, the end cover 301 covers the end surface of the telescopic tube 312, and the end cover 301 is rotatably connected to the end surface of the telescopic tube 312, optionally, the end cover 301 is concave An annular groove is provided, one end of the telescopic tube 312 is protruded with an annular strip, and the annular strip is slidably connected with the annular groove.

Correspondingly, the end of the telescopic tube 312 is provided with a hole, the shaft portion is inserted into the hole, and a limit member is added to prevent the shaft portion from being pulled out of the hole, and the shaft portion and the hole are in an interference fit, so that the clamp can be realized. 313 is rotatably connected to one end of the telescopic tube 312 .

In one embodiment, the outer wall of the telescopic tube 312 and/or the sleeve 311 is marked with scale values of length and angle. Therefore, the adjustment of the bracket 30 is more precise and adaptable.

As shown in Figure 4 to Figure 6, the present invention also provides a method for manufacturing a corrosion-resistant concrete beam skeleton, comprising the following steps:

A. Cut the stainless steel stranded wire 11 to the required length, and then connect the two ends of the stainless steel stranded wire to form a stranded wire hoop. Optionally, use the connecting block 12 to connect the two ends of the stainless steel stranded wire; Making a number of stranded wire hoops 10 of equal size;

B. Pass the four longitudinal bars 20 through each stranded wire hoop 10 respectively, and touch the four corners 101 of each stranded wire hoop 10 respectively, and then fix each stranded wire hoop 10 on the longitudinal bars 20 at intervals On, optionally, use the guide buckle to fix the stranded wire hoop 10 on the longitudinal bar 20;

C. at least two brackets 30 are placed between the four longitudinal ribs 20 at intervals, wherein the two brackets 30 are located at both ends of the four longitudinal ribs 20, and the four longitudinal ribs 20 are respectively connected with the four ends of the bracket 30; Optionally, the longitudinal rib 20 is connected with the clamp 313;

D. Spread the support 30 and adjust the support according to the required cross-sectional size of the concrete beam; specifically, the adjustment of the support 30 is realized by adjusting the length of the telescopic tube 312 and the angle between the two poles 31 .

E. Adjust the position of each stranded wire hoops 10 to ensure that the stranded wire hoops 10 on each surface are perpendicular to the longitudinal bars 20, and that the plurality of stranded wire hoops 10 are just in a tight state.

The skeleton of the present invention is very different from the skeleton using FPR mesh cloth. In order to make the stranded wire hoop 10 better tighten on the longitudinal bars 20, the manufacturing method of the skeleton of the present invention is different from that using the FPR stirrup skeleton. completely opposite.

The present invention has many significant practical advantages such as convenient construction, high adaptability, relatively economical, etc., can be widely used in the civil engineering industry, and will greatly improve the current civil engineering construction. It has a wide range of application prospects, and has important engineering practical significance and social and economic benefits.

The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. Inside.

Claims (8)

1. A corrosion resistant concrete beam skeleton, comprising:

the support at least comprises two support rods and a hoop which is respectively arranged at the end part of each support rod, each support rod is arranged in a staggered mode and connected to the same staggered point, and the hoop is rotatably connected to the end part corresponding to the support rod;

the longitudinal ribs are made of composite materials, the number of the longitudinal ribs is multiple, the longitudinal ribs are arranged in the same axial direction, and the longitudinal ribs are clamped on the corresponding hoops respectively; the number of the brackets is multiple, each bracket is arranged at intervals along the axial direction of the longitudinal ribs, and each longitudinal rib is circumferentially arranged around the central axis of each staggered point; and

the stranded wire hoop is made of corrosion-resistant materials, each longitudinal bar penetrates through the stranded wire hoop, the stranded wire hoop locks each longitudinal bar towards the central axis, the stranded wire hoops are arranged at intervals along the central axis, each stranded wire hoop comprises a stainless steel stranded wire and a connecting block, the two ends of each stainless steel stranded wire are connected through the connecting blocks in a buckling mode, and one end of each stainless steel stranded wire is connected to the connecting block through an adjustable structure;

the size of the stranded wire hoop can be adjusted, or the size of the bracket can be adjusted, or the size of the stranded wire hoop and the size of the bracket can be adjusted simultaneously, so that different concrete beams can be adapted.

2. A corrosion resistant concrete beam skeleton as recited in claim 1, wherein: the connecting block is made of aluminum.

3. A corrosion resistant concrete beam skeleton as recited in claim 1, wherein: the bracket further comprises a hinge, and each strut is hinged through the hinge.

4. A corrosion resistant concrete beam skeleton according to claim 3, wherein: the support rod comprises a sleeve and an extension pipe; the telescopic pipe is telescopically arranged on the sleeve; the two telescopic pipes are arranged at two ends of the sleeve in a telescopic manner; the free end of the two telescopic pipes is provided with the clamp.

5. A corrosion resistant concrete beam skeleton according to claim 4, wherein: the clamp is rotatably connected to one end of the telescopic pipe.

6. A corrosion resistant concrete beam skeleton according to claim 5, wherein: one end of the hoop is provided with an end cover which covers the end surface of the telescopic pipe, and the end cover is rotatably connected with the end surface of the telescopic pipe.

7. A corrosion resistant concrete beam skeleton according to claim 4, wherein: the length and angle scale values are marked on the outer wall of the extension tube and/or the sleeve.

8. The manufacturing method of the corrosion-resistant concrete beam framework is characterized by comprising the following steps of: for the preparation of a corrosion-resistant concrete beam skeleton according to any one of claims 1 to 7, the manufacturing method comprising the steps of,

A. cutting the stainless steel stranded wire to a required length, connecting two ends of the stainless steel stranded wire to form a stranded wire hoop, and manufacturing a plurality of stranded wire hoops with the same size according to the number requirement;

B. respectively penetrating the four longitudinal bars through each stranded wire hoop, respectively abutting against four corners of each stranded wire hoop, and fixing each stranded wire hoop on the longitudinal bars at intervals;

C. placing at least two supports between the four longitudinal ribs at intervals, wherein the two supports are positioned at two ends of the four longitudinal ribs, and the four longitudinal ribs are respectively connected with four end parts of the supports;

D. the support is propped open, and the support and/or the stranded wire hoop are/is adjusted according to the section size of the required concrete beam;

E. the position of each stranded wire hoop is adjusted to ensure that the stranded wire hoops on each surface are vertical to the longitudinal bars, and the stranded wire hoops are just in a tight state.

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