Concrete casting separators with different strengths at beam-column joints

Abstract

The present invention discloses a separator for pouring concrete of different strengths at a beam-column joint, comprising a separator body, wherein: the separator body comprises a steel bottom plate, on which two clamping assemblies are arranged in parallel; a plurality of sleeves arranged in parallel are installed between the two clamping assemblies, wherein the two ends of each sleeve are respectively placed in the two clamping assemblies and each sleeve is limited between the two clamping assemblies; a plurality of blocking rods for forming an interface between concrete of different strengths at the beam-column joint position are inserted into the separator body, wherein each blocking rod is inserted into a corresponding sleeve in the two clamping assemblies and is pressed and positioned by the two clamping assemblies. The present invention ensures the separation effect and pouring quality of concrete of different strengths at the beam-column joint position, reduces the waste of concrete, and has a good visual effect.

Description

Technical Field

[0001] The invention relates to a separator, in particular to a separator used for forming a dividing interface when pouring concrete of different strengths at a beam-column joint position. Background Art

[0002] During the concrete pouring operation of the beam-column joint of reinforced concrete structure, due to the force design of the beam-column joint and other reasons, the concrete strength used in the structural column is generally greater than the concrete strength used in the structural beam. The conventional pouring method is usually divided into two steps, that is, the concrete of the structural column is poured first, and then the concrete of the structural beam is poured. In the actual pouring process, the above two steps must be carried out in sequence and require an effective concrete inclined interface to be set between concretes of different strengths. Therefore, how to accurately separate the concretes of different strengths between the structural columns and beams and form a complete interface according to the design requirements is a major problem in the construction field. At present, the interface set between concretes of different strengths is generally achieved by isolation measures, that is, near the beam-column joint, the distance from the end of the structural column is greater than 500mm, and the position meets the height of greater than 1 / 2 of the structural beam, along the inclined surface of any angle between 30 degrees and 60 degrees, from the top to the bottom of the beam, it is separated by a dense mesh wire mesh fixed on the steel bars in the structural beam before pouring to form an interface. It can be found from actual construction that the above existing methods have the following defects:

[0003] 1. Due to the close spacing of the stirrups of the structural beam, the mesh surface of the wire mesh can usually only be close to vertical, which cannot meet the design requirement of 30-60 degree inclination angle.

[0004] 2. The wire mesh forming the interface has the problem of loose sealing, which will cause the concrete of the structural column to flow (or disperse, seep, etc.) toward the structural beam during the pouring process, and the upper surface elevation of the structural column concrete will drop. After the subsequent pouring of the structural beam concrete, the lowered part of the column end will be covered by the structural beam concrete, and the beam-column concrete will be mixed at the position of the structural column, which reduces the mechanical properties of the structural column and creates quality risks that are difficult to make up for.

[0005] 3. In actual operation, on the one hand, the operating space of the steel bars at the bottom of the structural beam before pouring is narrow, which makes it difficult to tie the wire mesh smoothly. On the other hand, the steel bars of the structural beam and the pouring formwork cannot be effectively sealed with wire mesh before pouring. All of the above situations will cause the concrete of the structural column to flow in large quantities toward the structural beam. The interface after the concrete flows is random and irregular. Since the color of the concrete of the beam and column is different in depth, it will cause a poor visual effect and affect the overall quality of the reinforced concrete structure.

[0006] 4. Since the cost of high-strength concrete in the structural column is relatively high, when the concrete of the structural column flows into the structural beam, it will occupy space in the beam, thereby relatively increasing the amount of high-strength concrete used and causing unnecessary waste of concrete materials. Summary of the invention

[0007] The purpose of the present invention is to provide a separator for pouring concrete of different strengths at a beam-column joint, which ensures the separation effect and pouring quality of concrete of different strengths at the beam-column joint position, reduces the waste of concrete, and has a good visual effect.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A separator for pouring concrete of different strengths at a beam-column joint, characterized in that it comprises a separator body, wherein: the separator body comprises a steel base plate, on which two clamping assemblies are arranged in parallel; a plurality of sleeves arranged in parallel are installed between the two clamping assemblies, wherein both ends of each sleeve are respectively placed in two clamping assemblies and each sleeve is limited between the two clamping assemblies; a plurality of sealing rods for forming an interface between concrete of different strengths at the beam-column joint position are inserted into the separator body, wherein each sealing rod is passed through a corresponding sleeve in the two clamping assemblies and is pressed and positioned by the two clamping assemblies.

[0010] The advantages of the present invention are:

[0011] On the one hand, the separator of the present invention has a good separation effect and can form a clearly visible interface with good appearance at the beam-column node, without the problem of concrete flow, thus avoiding the waste of concrete. On the other hand, the interface meets the inclination requirement between 30 degrees and 60 degrees, ensuring the quality of concrete pouring at the beam-column node position, and can be recycled and used at low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural stereoscopic schematic diagram of a concrete casting separator with different strengths at a beam-column joint of the present invention.

[0013] Figure 2 It is a structural stereoscopic schematic diagram of a concrete casting separator of different strengths at a beam-column joint of the present invention without installing a blocking rod (the upper and lower sealing plates of one of the clamping assemblies are not shown).

[0014] Figure 3 It is a structural schematic diagram of the clamping assembly.

[0015] Figure 4 yes Figure 3 Enlarged schematic diagram of part A.

[0016] Figure 5It is a schematic diagram for explaining the placement of the concrete pouring separators of different strengths at the beam-column joint of the present invention before the concrete pouring of the beam and column.

[0017] Figure 6 It is a diagram showing the effect of using the concrete pouring separator with different strengths at the beam-column joint of the present invention. DETAILED DESCRIPTION

[0018] like Figures 1 to 5 The separator for pouring concrete of different strengths at the beam-column joint of the present invention includes a separator body, wherein: the separator body includes a steel base plate 10, on which two clamping assemblies 20 are arranged in parallel, that is, the two clamping assemblies 20 are spaced a set distance apart; a plurality of sleeves 40 arranged in parallel are installed between the two clamping assemblies 20, wherein both ends of each sleeve 40 are respectively placed in the two clamping assemblies 20 and each sleeve 40 is limited between the two clamping assemblies 20; a plurality of blocking rods 30 for forming an interface between concrete of different strengths at the beam-column joint position are inserted into the separator body, wherein each blocking rod 30 is passed through a corresponding sleeve 40 in the two clamping assemblies 20 and is pressed and positioned by the two clamping assemblies 20.

[0019] like Figures 2 to 4 The clamping assembly 20 includes a steel plate frame 21 with a rectangular cross section and two frame openings. The steel plate frame 21 is formed by welding four steel plates. The bottom of the steel plate frame 21 is welded to the steel bottom plate 10. The top of the steel plate frame 21 is movably screwed with a screw 24. Figure 2 , usually two screw rods 24 separated from each other are designed, one end of the screw rod 24 exposed outside the steel plate frame 21 is installed with a nut 25, and the nut 25 can be a detachable nut, and the other end of the screw rod 24 extending into the steel plate frame 21 is connected to the steel pressure plate 22, wherein: the frame openings on one side of the steel plate frame 21 of the two clamping assemblies 20 are arranged opposite to each other, and the frame openings on the other side are back to back and strip-shaped upper sealing plates 28 and lower sealing plates 29 are installed (welded) up and down, that is, the upper and lower sealing plates 28, 29 respectively arranged on the two clamping assemblies 20 are on the back side, and a strip opening is formed between the upper sealing plate 28 and the lower sealing plate 29, which allows the blocking rod 30 to pass through but does not allow the sleeve 40 to pass through, that is, the upper and lower sealing plates 28, 29 seal a part of the frame opening of the steel plate frame 21, and a limiting space for accommodating the sleeve 40 is formed between the steel plate frames 21, the steel pressure plate 22, the upper sealing plate 28 and the lower sealing plate 29 of the two clamping assemblies 20.

[0020] In actual design, the sleeve 40 is made of a round steel pipe.

[0021] like Figure 3 In the steel plate frame 21, end plates 221 extend downward from both ends of the steel pressure plate 22, that is, the steel pressure plate 22 and the end plates 221 at both ends form a U-shape with the opening facing downward. In actual design, the height of the end plate 221 should be smaller than the outer diameter of the sleeve 40.

[0022] like Figure 4 A through hole (such as a screw hole, not shown in the figure) is provided on the top of the steel plate frame 21, a nut 23 is welded at the position of the through hole, and a screw rod 24 is screwed on the nut 23 and passes through the through hole.

[0023] like Figure 4 A round cover 26 is welded on the steel pressing plate 22, and the end of the screw rod 24 extending into the steel plate frame 21 extends into the round cover 26 through a through hole 261 opened on the round cover 26 and is welded with a round piece 27, so that the round piece 27 is movably placed in the round cover 26. This structural design can produce a tight fit between the round piece 27 and the round cover 26, thereby ensuring that the steel pressing plate 22 can press the sleeve 40 and the blocking rod 30 without causing rigid damage.

[0024] like Figure 2 The nut 25 is provided with a handle 251 for easy screwing.

[0025] In actual design, the sleeve 40 can move horizontally along the length direction of the steel plate frame 21, but cannot move in a direction perpendicular to the length direction of the steel plate frame 21, that is, both ends of the sleeve 40 are restricted in the limiting space and cannot move in a direction perpendicular to the length direction of the steel plate frame 21.

[0026] like Figure 1 The blocking rod 30 includes a round steel 31 for isolating concrete of different strengths to form an interface. A handle 32 for pulling is welded to one end of the round steel 31 , wherein the handle 32 can be made of round steel, and is usually arranged perpendicular to the round steel 31 .

[0027] Furthermore, in order to ensure strength and rigidity and prevent bending and deformation during the casting process, the blocking rod 30 is made entirely of solid round steel.

[0028] In actual design, the outer diameter of the round steel 31 of the blocking rod 30 is adapted to the inner diameter of the sleeve 40, so that after the round steel 31 is inserted into the sleeve 40, it can be close to the sleeve 40 and can move flexibly in the sleeve 40 along a direction perpendicular to the length direction of the steel plate frame 21.

[0029] In actual design, the number of sleeves 40 provided in the clamping assembly 20 can be flexibly designed according to the size of the steel structure 50 and the binding conditions of the main steel bars 51 therein, and the sleeves 40 should be able to translate along the length direction of the steel plate frame 21 within the limited space.

[0030] When in use, the separator of the present invention is placed on the steel structure 50 of the structural beam before pouring at any angle between 30 degrees and 60 degrees, and the bottom and both sides of the steel structure 50 are respectively supported with a bottom formwork and a side formwork (not shown in the figure), wherein the separator body is placed on the main steel bar 51 at the top of the steel structure 50 and close to a stirrup 52, and the blocking rod 30 inserted into the steel structure 50 is inserted into the steel structure 50, and the entire separator of the present invention is located on the adjacent surface between the concretes of different strengths to be poured. Then, by observing the position of the main steel bar 51 at the top and bottom of the steel structure 50, the handle 32 of the blocking rod 30 is used to adjust the position of each sleeve 40 in the limited space by moving the blocking rod 30, and then the position of each blocking rod 30 is determined, wherein the two outermost blocking rods 30 on the separator body are located outside the stirrup 52, and the remaining blocking rods 30 are extended to the main steel bar 51 at the bottom of the steel structure 50 according to their respective positions, and then are located above the main steel bar 51 or pass through the main steel bar 51 and are located below it. Then, the screw rod 24 is screwed by the handle 251, and the screw rod 24 moves into the steel plate frame 21, and drives the steel pressure plate 22 to press the sleeve 40 and the sealing rod 30 therein, so that the sealing rod 30 is pressed and fixed, so that each sealing rod 30 on the inner side of the main steel bar 51 at the top of the steel structure 50 is close to the main steel bar 51 and they are in close contact to form a dense partition surface, so as to achieve the purpose of greatly reducing the flow (or dispersion, seepage, etc.) of the concrete of the structural column toward the structural beam during the pouring process.

[0031] After the separator of the present invention is installed, the concrete pouring can be started. First, the concrete of the structural column 60 is poured on one side of the separator of the present invention, and then the concrete of the structural beam 70 is poured on the other side of the separator of the present invention. After the concrete pouring on both sides is completed and before the initial setting, the separator of the present invention can be removed.

[0032] After removing the separator of the present invention, a clearly visible interface 80 is formed between the concretes of different strengths at the beam-column joint. Figure 6 shown.

[0033] The advantages of the present invention are:

[0034] 1. On the one hand, the separator of the present invention is easy to place and install on the structural beam before pouring, and the inclination angle can be flexibly adjusted according to the design requirements, which can meet the inclination requirements between 30 degrees and 60 degrees. On the other hand, the blocking rod with a certain rigidity is directly and tightly fitted with the steel structure of the structural beam before pouring, so the separation effect is good, and the phenomenon of the concrete of the structural column flowing (or dispersion, seepage, etc.) toward the structural beam during the pouring process is prevented.

[0035] 2. The separator of the present invention can form a tight interface by means of the close arrangement of the blocking rods, which can effectively avoid many quality risks caused by the flow of concrete and the economic loss of high-strength concrete waste.

[0036] 3. After the concrete pouring of the beam and column is completed, the interface formed at the beam-column node by the separator of the present invention is clearly visible, there is no concrete flow problem, and the appearance effect is good.

[0037] 4. The separator of the present invention can ensure the quality of concrete pouring at the beam-column joint position, meet the requirements of "Concrete Structure Engineering Construction Quality Acceptance Code" GB50204-2015, can be used cyclically, and ensure the construction quality of reinforced concrete structure.

[0038] 5. The present invention can be manufactured using common steel plates, nuts, round steel pipes, round steel, etc. on the market, and the product cost is low.

[0039] 6. The present invention has a simple and practical structure, is easy to operate, and is convenient to install and disassemble, thus shortening the construction period and reducing the construction cost.

[0040] The above are preferred embodiments of the present invention and the technical principles used therein. For those skilled in the art, any obvious changes such as equivalent transformations, simple replacements, etc. based on the technical solution of the present invention, without departing from the spirit and scope of the present invention, are within the scope of protection of the present invention.

Claims

1. A beam-column joint concrete casting separator with different strengths, characterized by: It comprises a separator body, wherein: The separator body includes a steel bottom plate, on which two clamping assemblies are arranged in parallel; a plurality of sleeves arranged in parallel are installed between the two clamping assemblies, wherein the two ends of each sleeve are respectively placed in the two clamping assemblies and each sleeve is limited between the two clamping assemblies; a plurality of blocking rods used to form a dividing interface between concretes of different strengths at the beam-column node position are inserted into the separator body, wherein each blocking rod is inserted into a corresponding sleeve in the two clamping assemblies and is pressed and positioned by the two clamping assemblies; The clamping assembly comprises a steel plate frame of a rectangular cross-section, a screw rod is movably screwed on the top of the steel plate frame, a nut is installed on one end of the screw rod exposed outside the steel plate frame, and the other end of the screw rod extending into the steel plate frame is connected to the steel pressure plate, wherein: the frame openings on one side of the steel plate frames of the two clamping assemblies are arranged opposite to each other, and the frame openings on the other side are provided with an upper sealing plate and a lower sealing plate above and below, an opening is formed between the upper sealing plate and the lower sealing plate, which allows the blocking rod to pass through but does not allow the casing to pass through, and a limiting space for accommodating the casing is formed between the steel plate frames, the steel pressure plate, the upper sealing plate and the lower sealing plate of the two clamping assemblies; The top of the steel plate frame is provided with a through hole, a nut is welded at the position of the through hole, and the screw is screwed on the nut and passes through the through hole; A round cover is welded on the steel pressing plate, and the end of the screw rod extending into the steel plate frame extends into the round cover through a through hole opened on the round cover and is welded with a round piece so that the round piece can be movably placed in the round cover; The blocking rod comprises a round steel bar used for isolating concretes of different strengths to form an interface, and a handle for pulling is welded at one end of the round steel bar.

2. The beam-column joint concrete casting separator of different strengths as claimed in claim 1, characterized in that: In the steel plate frame, end plates are respectively extended downward at both ends of the steel pressure plate.

3. The beam-column joint concrete casting separator of different strengths as claimed in claim 1, characterized in that: The nut is provided with a handle for easy screwing.

4. The beam-column joint concrete casting separator of different strengths according to any one of claims 1 to 3, characterized in that: The sleeve can be translated and moved along the length direction of the steel plate frame.

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