High-low grade concrete intercepting device for double-layer two-way continuous row type beam-column joint

Abstract

The utility model provides a high-low grade concrete intercepting device for double-layer two-way continuous row type beam column joints, and particularly relates to the technical field of concrete pouring. The intercepting device is used for being installed in a beam formwork, the beam formwork comprises a left side plate, a right side plate and a bottom plate, and the intercepting device comprises a vertical intercepting assembly and a horizontal intercepting assembly. The horizontal intercepting assembly is placed on the side, away from the frame column, of the vertical intercepting assembly. The vertical intercepting assembly comprises a combined frame, a first storage column and a plurality of vertical air bags arranged side by side. The horizontal intercepting assembly comprises a second storage column and a plurality of transverse air bags arranged side by side. Air inlets of the vertical air bags or the transverse air bags are all provided with air inlet and outlet switches; separated pouring of different concrete grades is achieved in the beam-column junction area through the vertical intercepting assemblies and the horizontal intercepting assemblies. The device is simple and reasonable in structure, convenient to disassemble, assemble and reuse, and capable of effectively achieving interception construction of concrete of different grades of beam-column joints and meeting the requirements of construction specifications at the same time.

Description

Technical Field

[0001] This utility model relates to the field of concrete pouring technology, specifically to a double-layer, bidirectional, continuous beam-column joint high and low grade concrete interception device. Background Technology

[0002] As modern architecture becomes taller and more complex, concrete construction technology faces increasingly stringent requirements. In concrete structural design, to meet relevant seismic fortification standards, the design principle of "strong column-weak beam, strong shear-weak bending, strong joint-weak member" is commonly adopted. Beam-column joints, as critical load-bearing components, often exhibit significant differences in concrete strength grades; that is, column concrete strength is typically higher than beam concrete, and this difference widens with increasing building height. This leads to the construction challenge of using different strength grades of concrete for beam-column joints in concrete structures.

[0003] In traditional construction techniques, the core area of ​​beam-column joints is typically poured in stages, first the frame columns, then the frame beams. However, due to the dense reinforcement, complex structural forms, and limited construction space in the beam-column joint area, cold joints easily form at the interface between concrete of different strength grades, affecting the overall structural integrity. Furthermore, traditional interception techniques suffer from numerous problems: cumbersome sealing procedures, difficulty in controlling concrete leakage, widespread over-pouring, significant cross-contamination issues, and poor appearance quality after formwork removal. These problems make the interception technology for high and low grade concrete at beam-column joints a long-standing technical challenge in the construction field.

[0004] Currently, the main methods used in China for intercepting different grades of concrete at beam-column joints are quick-closing mesh or air-filled barriers. However, these methods still have many limitations in practical applications and cannot fully meet the quality and efficiency requirements of modern building construction. For example, quick-closing mesh often involves cumbersome binding and connection with reinforcing bars, resulting in low construction efficiency. It is difficult to properly install the mesh, and the mesh's limited sealing properties allow large amounts of concrete slurry to flow into the beam from the sides and bottom, leading to significant color differences at the bottom, making later cleaning and repair difficult, causing unnecessary waste, and resulting in poor concrete appearance after demolding. While air-filled barriers are relatively simple, they also suffer from poor stability, are easily crushed or displaced by the lateral pressure of the concrete during pouring, making the interception effect difficult to control and potentially causing over-pouring and cross-contamination issues. Utility Model Content

[0005] To address the above problems, this utility model provides a double-layer, bidirectional, continuous beam-column joint high-low grade concrete interception device, the specific technical solution of which is as follows:

[0006] A double-layer, bidirectional, continuous beam-column joint high- and low-grade concrete interception device is disclosed, for installation within beam formwork. The beam formwork includes left and right side plates and a bottom plate. The interception device comprises a vertical interception component and a horizontal interception component. The horizontal interception component is placed on the side of the vertical interception component away from the frame column. The vertical interception component includes a combined frame, a first receiving column, and several vertical airbags arranged side by side. The combined frame is a U-shaped frame with an open bottom, including a top rod and two side rods. The top rod extends outward at both ends to form an overlap. The first receiving column is located at the open end of the combined frame. Several vertical airbags are arranged along the length of the side rods within a rectangular frame structure enclosed by the combined frame and the first receiving column. The horizontal interception component includes a second receiving column and several horizontal airbags arranged side by side. Several horizontal airbags are horizontally positioned on one side of the second receiving column. The air inlets of several vertical or horizontal airbags are equipped with air inlet and air outlet switches. The beam-column junction area is separated for pouring concrete of different grades through the vertical and horizontal interception components.

[0007] Preferably, the first and second storage columns have the same structure, both including a hollow tube and a protective shell snapped onto the top of the hollow tube. The cavity of the hollow tube forms an inflation or deflation channel. One end of the hollow tube is provided with an air port. The top wall of the hollow tube is provided with an air pipe corresponding to the position of the air inlet of the vertical or horizontal airbag. The air inlets of several vertical airbags are connected to the cavity of the hollow tube of the first storage column through the air pipe, and their inflation or deflation is controlled by an air inlet / exhaust switch. The air inlets of several horizontal airbags are connected to the cavity of the hollow tube of the second storage column through the air pipe, and their inflation or deflation is controlled by an air inlet / exhaust switch.

[0008] Preferably, the inner sidewall of the top rod of the combined frame is provided with a plurality of self-locking fixing buckles at equal intervals along its length.

[0009] Preferably, each of the vertical airbags has an airbag buckle at the end furthest from the air inlet; the vertical airbags are engaged with the self-locking fixing buckles on the top rod of the combined frame via the airbag buckles.

[0010] Preferably, the two side plates are symmetrically provided with through holes near the bottom; the two ends of the first storage column pass through the two through holes respectively and are rotatably connected to the left and right side plates.

[0011] Preferably, the width of the vertical interception component and the horizontal interception component are the same as the net distance between the two side plates; the height of the vertical interception component and the horizontal interception component are the same.

[0012] More preferably, the inflation pressure of the vertical or horizontal airbag is 0.5 MPa.

[0013] More preferably, during inflation, the air inlet is connected to the inflation device through an inflation pipe; during deflation, the air inlet is in an open state and connected to the atmospheric pressure outside the hollow tube.

[0014] More preferably, when grouting the frame beam is performed, the bottom of the vertical interception component remains stationary due to the insertion of the first receiving column and the left and right side plates. Under the lateral pressure of the concrete, the upper parts of the horizontal and vertical interception components tilt together towards the frame column until the overlapping parts at both ends of the top rod of the combined frame abut against the top of the left and right side plates and stop tilting further. At this time, the distance between the top rod and the frame column is 500mm and the angle between the vertical interception component and the bottom plate near the main body is 45°.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model uses a double-layer, bidirectional, continuous row of intercepting airbags in conjunction with beam formwork to divide the beam-column junction area into a high-strength column joint pouring section and a low-strength beam-slab pouring section that are not connected to each other. The vertical intercepting components and the horizontal intercepting components fill the gaps that cannot be filled due to the obstruction of the steel bars, thus ensuring the quality of concrete construction.

[0017] 2. This utility model can be prefabricated in the factory according to different selections. On-site installation can be completed simply by fixing it to the template. When in use, it is connected to the inflation device to inflate the airbags. After use, the independent air inlet and outlet switches of each airbag are opened to release the air from the air outlet and store it in the storage column and cover it with a protective shell for easy storage. Attached Figure Description

[0018] The accompanying drawings constituting this utility model are provided to further understand this application and do not constitute an undue limitation on this application.

[0019] Figure 1 This is a schematic diagram showing the location of the connection between the present invention and the beam-column joint after the first pour is completed;

[0020] Figure 2 This is a schematic diagram of the vertical interception component in this utility model;

[0021] Figure 3 This is a schematic diagram of the horizontal interception component in this utility model;

[0022] Figure 4 This is a structural diagram of the first (or second) storage column;

[0023] Figure 5 This is a schematic diagram of the structure inside the first (or second) storage column;

[0024] Figure 6 This is a schematic diagram showing the vertical interception component after installation.

[0025] Figure 7 This is a diagram showing the horizontal interception component after installation.

[0026] In the diagram, 1-first storage column; 2-vertical airbag; 3-combined frame; 4-horizontal airbag; 5-second storage column; 6-air vent; 7-self-locking fixing buckle; 8-frame beam; 9-frame column; 10-airbag buckle; 11-beam longitudinal reinforcement; 12-beam formwork; 13-protective shell. Detailed Implementation

[0027] The specific implementation of the double-layer, bidirectional, continuous beam-column joint high and low grade concrete interception device provided by this utility model will be further described with reference to the accompanying drawings and embodiments.

[0028] A double-layer, bidirectional, continuous beam-column joint high and low grade concrete interception device is used to be installed inside the beam formwork 12, wherein the beam formwork 12 includes two side plates and a bottom plate; specifically, the interception device includes a vertical interception component and a horizontal interception component; the horizontal interception component is placed on the side of the vertical interception component away from the frame column 9, and the beam-column junction area is separated for pouring of different concrete grades through the vertical interception component and the horizontal interception component.

[0029] like Figure 2 As shown, the vertical interception assembly includes a first storage column 1, a combined frame 3, and several vertical airbags 2 arranged side by side. Preferably, the combined frame 3 is a U-shaped frame with an open bottom, including a top rod and two side rods on the left and right; wherein the two ends of the top rod extend outward to form an overlapping part. The first storage column 1 is horizontally arranged at the open end of the combined frame 3; several vertical airbags 3 are arranged along the length direction of the side rods of the combined frame 3 within the rectangular frame structure enclosed by the combined frame 3 and the first storage column 1.

[0030] Preferably, the inner sidewall of the top rod of the combined frame 3 is provided with a plurality of self-locking fixing buckles 7 at equal intervals along its length; each of the plurality of vertical airbags 2 is provided with an airbag buckle 10 at the end away from the air inlet; each vertical airbag 2 is engaged with the self-locking fixing buckle 7 on the top rod of the combined frame 3 through the airbag buckle 10.

[0031] like Figure 3 As shown, the horizontal interception component includes a second storage column 5 and several horizontal airbags 4 arranged side by side; the several horizontal airbags 4 are horizontally arranged on one side of the second storage column 5.

[0032] In order to control the inflation or deflation of each airbag, each vertical airbag 2 or horizontal airbag 4 is equipped with an independent air inlet / outlet switch, which facilitates the airbag corresponding to the position of the longitudinal reinforcement 11 of the beam to be vented during installation, so as to make way for the longitudinal reinforcement 11 of the beam.

[0033] like Figure 4-5 As shown, the first storage column 1 and the second storage column 5 have the same structure, both including a hollow tube and a protective shell 13 snapped onto the top of the hollow tube. The cavity of the hollow tube forms an inflation or deflation channel; one end of the hollow tube is provided with an air port 6; when inflating, the air port 6 is connected to an inflation device through an inflation tube; when deflation, the air port 6 is in an open state and connected to the atmospheric pressure outside the hollow tube.

[0034] Preferably, the top wall of the hollow tube 6 is provided with an independent air pipe corresponding to the position of the air inlet of each vertical airbag 2 or horizontal airbag 4; the air inlets of several vertical airbags 2 or horizontal airbags 4 are all connected to the cavity of the hollow tube of the first storage column 1 or the second storage column 5 through the air pipe, and their inflation or deflation is controlled by the air inlet / exhaust switch.

[0035] In use, first connect the air inlet 6 to the inflation device, remove the protective shell 13, open all the air inlet and air outlet switches and inflate the vertical airbag 2 or the horizontal airbag 4 through the air inlet 6. After it is full, close the air inlet and air outlet switches. Then keep the air inlet and air outlet switches of the vertical airbag 2 or the horizontal airbag 4 corresponding to the location of the longitudinal rib 11 open, disconnect the air inlet 6 from the inflation device so that it is connected to the atmospheric pressure outside the cavity, squeeze the air in the vertical airbag 2 or the horizontal airbag 4 corresponding to the location of the longitudinal rib 11 back into the inflation or deflation channel, and finally discharge it from the air inlet 6. Finally, store it.

[0036] It is worth noting that, in order to ensure that the gap between two adjacent airbags is small enough when the airbags are inflated to prevent concrete leakage, the inflation pressure of the vertical or horizontal airbags is 0.5 MPa. When the interception device is not in use, several vertical airbags 2 or horizontal airbags 4 only need to be coiled around the air tube as the center and placed inside the storage cavity formed by the protective shell 13 of the first storage column 1 or the second storage column 5 and the top of the hollow tube; when in use, simply remove the protective shell 13, inflate each airbag, and deflate the airbag at the position of the longitudinal reinforcement 11 of the beam to make room.

[0037] Preferably, the two side plates of the beam template 12 have symmetrical through holes near the bottom. The two ends of the first receiving column 1 pass through two of these through holes and are rotatably connected to the left and right side plates of the beam template 12. On one hand, the insertion of the first receiving column 1 into the side plates can limit and fix the bottom of the vertical interception component; on the other hand, the first receiving column 1 acts as a pivot to achieve a rotatable connection between the vertical interception component and the side plates. The horizontal interception component is simply placed inside the beam template 12 and adjacent to the vertical interception component; there is no fixed connection between it and the beam template 12 or the vertical interception component.

[0038] It is worth noting that the width of the vertical interception component and the horizontal interception component are the same as the net spacing between the two side plates of the beam formwork 12; the height of the vertical interception component and the horizontal interception component are the same.

[0039] According to the "Code for Construction of Concrete Structures" GB50666, when the concrete strength of the column is two or more grades higher than that of the beam and slab concrete, separation measures should be taken in the boundary area. The separation position should be on the side of the lower strength grade and not less than 500mm from the edge of the higher strength grade component. The tilt angle of the interception device directly affects the pouring effect: when the tilt angle is less than 45°, although it is easier to install and fix, it may increase the risk of high-strength concrete flowing into the lower strength area; when the tilt angle is greater than 45°, although the risk of concrete flow is reduced, it may increase the construction difficulty, especially when installing and fixing the interception device in a narrow space. Therefore, in this utility model, the specific dimensions of the vertical and horizontal interception components are set according to the parameters of 500mm from the high-strength grade component (frame column 9) and a tilt angle of 45°, namely:

[0040] When grouting the frame beam, the horizontal and vertical interception components tilt together towards one side of the frame column 9 under the lateral pressure of the concrete until the overlapping parts of the top rods of the composite frame 3 abut against the top of the side plate and the distance between the top rod and the frame column 9 is exactly 500mm, and the angle between the vertical interception component and the bottom plate near the main body is 45°. At this point, the separation pouring effect is better.

[0041] More preferably, in order to facilitate installation and disassembly and ensure the cyclic service life of the airbags, both the vertical airbag 2 and the horizontal airbag 4 are made of a smooth, puncture-resistant and wear-resistant material.

[0042] The construction process of this utility model specifically includes the following steps:

[0043] S1. The construction site completes the erection of beam formwork and the installation and binding of steel bars for each beam and column;

[0044] S2. Insert the vertical interception component vertically into the beam template and install both ends of the first receiving column into the through holes of the left and right side plates, as follows. Figure 6 As shown; then vertically insert the horizontal intercepting component (with the air inlet side facing upwards) into the beam formwork on the side away from the frame column, keeping the horizontal intercepting component tightly adjacent to the vertical intercepting component, as shown. Figure 7 As shown; (at this time, the air inlets on the first and second storage columns are exposed on the outside of the beam formwork)

[0045] S3. Connect the air inlet to the inflation device and inflate the vertical and horizontal airbags. After all airbags are inflated, disconnect the air inlet from the inflation device and close the air inlet / exhaust switch. Then, open the air inlet / exhaust switches of the vertical and horizontal airbags corresponding to the longitudinal reinforcement of the beam to vent the air and retract them to make way for the installation position of the longitudinal reinforcement of the beam. Finally, fix the airbag buckles on the inflated vertical airbags to the self-locking fixing buckles at the corresponding positions.

[0046] S4. Seal the clearance area of ​​the airbag structure where the longitudinal reinforcement of the beam is installed with concrete and wait for it to solidify (to facilitate the easy removal of the concrete seal when disassembling the interception device later, lubricant can be applied to the surface of the airbag in this area) to avoid cross-contamination of different grades of concrete in the gaps, and then complete the installation.

[0047] S5. First, perform side grouting of the frame beam (this device is used on the side away from the frame column). Figure 1 In area A of the structure, after the concrete has hardened, remove the vertical and horizontal interception components, vent all airbags, clean them, and store them for future use; then proceed with grouting along the sides of the frame columns (…). Figure 1 You can find it in section B.

[0048] It is worth noting that when grouting the frame beam, the bottom of the vertical interception component remains stationary due to the insertion of the first receiving column and the two side plates. Under the lateral pressure of the concrete, the tops of the horizontal and vertical interception components tilt together towards the frame column. However, since the design of this utility model is based on the distance between the top rod and the frame column being 500mm and the tilt angle being 45°, when this condition is met, the combined frame 3 stops tilting and the overlapping part abuts against the top surface of the side plate of the beam formwork.

[0049] The interception device provided by this utility model is convenient, reliable, and easy to operate. It can be factory-produced according to the specific dimensions of the beam template, making it easy to install and disassemble. In addition, the interception device can be recycled, reducing the manpower and material costs of construction and effectively improving construction efficiency.

[0050] In this utility model, terms such as "upper," "lower," "bottom," and "top" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are merely used to facilitate the description of the structural relationships of the various components or elements of this utility model and do not specifically refer to any part or element of this utility model; they should not be construed as limiting this utility model. Terms such as "connected" and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be determined according to the specific circumstances, and they should not be construed as limiting this utility model.

[0051] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A double-layer bidirectional continuous row beam-column joint high-low grade concrete intercepting device for installation in a beam formwork, the beam formwork comprising left and right side plates and a bottom plate, characterized in that, The intercepting device comprises a vertical intercepting assembly and a horizontal intercepting assembly; the horizontal intercepting assembly is placed on the side of the vertical intercepting assembly away from the frame column; The vertical intercepting assembly comprises a combined frame, a first receiving column and a plurality of vertical air bags arranged side by side; the combined frame is a U-shaped frame with an open bottom, comprising a top rod and two side rods; the top rod extends outward at both ends to form an overlapping portion; the first receiving column is arranged at the open end of the combined frame; a plurality of vertical air bags are arranged in the rectangular frame structure formed by the combined frame and the first receiving column along the length direction of the side rod; The horizontal intercepting assembly comprises a second receiving column and a plurality of horizontal air bags arranged side by side; a plurality of horizontal air bags are arranged on one side of the second receiving column; The air inlet of each vertical air bag or horizontal air bag is provided with an air inlet and outlet switch; The beam-column junction area is realized by the vertical intercepting assembly and the horizontal intercepting assembly to separate pouring of different concrete grades.

2. The double-layer bidirectional continuous row beam-column joint high-low grade number concrete intercepting device according to claim 1, characterized in that, The first receiving column and the second receiving column are the same in structure, each comprising a hollow tube and a protective shell clamped on the top of the hollow tube; the lumen of the hollow tube forms an inflation or exhaust passage; one end of the hollow tube is provided with an air port; the top wall of the hollow tube is provided with an air pipe at a position corresponding to the air inlet of the vertical air bag or the horizontal air bag; The air inlets of a plurality of vertical air bags are communicated with the lumens of the hollow tubes of the first receiving column through the air pipes, and the inflation or exhaust thereof is controlled by the air inlet and outlet switch; the air inlets of a plurality of horizontal air bags are communicated with the lumens of the hollow tubes of the second receiving column through the air pipes, and the inflation or exhaust thereof is controlled by the air inlet and outlet switch.

3. The double-layer bidirectional continuous row beam-column joint high-low grade number concrete intercepting device according to claim 1, characterized in that, The inner side wall of the top rod of the combined frame is provided with a plurality of self-locking fixing buckles at equal intervals along the length direction thereof.

4. The double-layer bidirectional continuous row beam-column joint high-low grade number concrete intercepting device according to claim 3, characterized in that, One end of each vertical air bag away from the air inlet is provided with an air bag buckle; the vertical air bag is clamped with the self-locking fixing buckle on the top rod of the combined frame through the air bag buckle.

5. The dual-layer dual-directional continuous row beam column node high-low grade marking concrete intercepting device according to claim 1, characterized in that, Two side plates are symmetrically provided with through holes near the bottom; the two ends of the first receiving column respectively penetrate through the two through holes and are rotatably connected with the left and right side plates.

6. The dual-layer dual-directional continuous row beam column node high-low grade marking concrete intercepting device according to claim 1, characterized in that, The width of the vertical intercepting assembly and the horizontal intercepting assembly is the same as the net distance between the two side plates; the height of the vertical intercepting assembly and the horizontal intercepting assembly is the same.

7. The dual-layer dual-directional continuous row beam-column joint high-low grade marking concrete intercepting device according to claim 2, characterized in that, The inflation pressure of the vertical air bag or the horizontal air bag is 0.5 Mpa.

8. The dual-layer dual-directional continuous row beam-column joint high-low grade marking concrete intercepting device according to claim 2, characterized in that, When inflated, the air port is connected with the inflation equipment through the inflation pipe; when exhausted, the air port is in an open state and is communicated with the external atmospheric pressure of the hollow tube.

9. The dual-layer dual-directional continuous row beam-column joint high-low grade marking concrete intercepting device according to claim 5, characterized in that, When frame beam grouting is performed, the bottom of the vertical intercepting assembly is inserted with the first receiving column and the left and right side plates, so that the horizontal intercepting assembly and the bottom of the vertical intercepting assembly are not moved, while the upper part of the horizontal intercepting assembly and the vertical intercepting assembly are tilted to one side of the frame column under the lateral pressure of the concrete, until the overlapping portion at both ends of the top rod of the combined frame stops further tilting by abutting against the top of the left and right side plates, at which time the distance between the top rod and the frame column is 500 mm and the included angle between the vertical intercepting assembly and the side of the bottom plate close to the main body is 45°.

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