A rapid construction method for prefabricated square beam-column joints

Abstract

This invention discloses a rapid construction method for prefabricated square beam-column joints. The construction steps are: frame column installation, column cap installation, precast beam installation, beam-column joint reinforcement binding, formwork erection, pouring, and formwork removal. An air-bag mold assembly is used for formwork erection. In the construction of prefabricated square beam-column joints, this technical solution uses an air-bag mold assembly for formwork erection and the corresponding formwork removal process. This not only simplifies mold making and disassembly but also allows for convenient reuse. The air-bag mold assembly is particularly noteworthy for the following characteristics: 1. It does not alter the shape of the joint structure; 2. It provides overall deformation resistance after inflation; 3. The outer side can be reinforced with ribs; 4. It is lightweight and standardized; 5. It is easy to assemble and disassemble. Therefore, it avoids the technical problems of complex and difficult operation of tie structures when using traditional formwork structures in existing technologies, as well as the technical problems of inconvenient formwork removal and limited construction space.

Description

Technical Field

[0001] This invention relates to the field of beam-column joint construction technology, and in particular to a rapid construction method for prefabricated square beam-column joints. Background Technology

[0002] In existing technologies, when constructing prefabricated beams and columns, the main beam rests on the column cap or beam pad of the frame column. The beam-column joint is made of cast-in-place concrete. Not only does the beam-column joint require new formwork, but because the beam is prefabricated, the frame column is divided into four parts at this location, and each part needs to be separately formworked and fixed. The fabrication and installation of the formwork is cumbersome.

[0003] In addition, the construction of beam-column joints involves high-altitude operations, requiring aerial work platforms to transport workers to the column caps for formwork erection. Furthermore, the presence of floor slabs above the beam-column joints restricts the operating space, making construction extremely difficult. Not only are the available tie-in positions limited when fixing the formwork, but the simultaneous construction and installation of multiple segmented formwork sections is also more challenging, easily leading to bulging and bursting of the formwork during construction, resulting in poor concrete forming quality. Summary of the Invention

[0004] To address the shortcomings in the aforementioned background technology, this invention proposes a rapid construction method for prefabricated square beam-column joints, which solves the technical problems of difficult formwork construction and easy bulging and bursting of existing prefabricated square beam-column joints.

[0005] The technical solution of this application is as follows:

[0006] A rapid construction method for prefabricated square beam-column joints includes the following steps: frame column installation, column cap installation, precast beam installation, beam-column joint reinforcement binding, formwork erection, pouring, and formwork removal. Inflatable mold components are used for formwork erection. This technical solution utilizes inflatable mold components for formwork erection and the corresponding formwork removal process during the construction of prefabricated square beam-column joints. This simplifies mold fabrication and disassembly, and allows for convenient reuse. The inflatable mold components are particularly noteworthy for their following characteristics: 1. They do not alter the shape of the joint structure; 2. They provide overall deformation resistance after inflation; 3. The outer side can be reinforced with ribs; 4. They are lightweight and standardized; 5. They are easy to assemble and disassemble. Therefore, this method avoids the complex and difficult operation of tie structures when using traditional formwork structures in existing technologies, as well as the inconvenience of disassembling tie structures and the limitation of construction space.

[0007] Furthermore, the airbag mold assembly includes an L-shaped airbag template body. Four L-shaped airbag template bodies cooperate with the beams and columns to easily form a cubic or cuboid beam-column joint casting space. This not only features a simple structure and ease of fabrication but also facilitates installation and disassembly, avoiding the complex technical problems associated with using integral airbags. Airbag template connecting parts are provided on both the left and right sides of the lower end of the airbag template body, allowing adjacent airbag template bodies to be detachably connected via these connecting parts. Based on the above technical solution, this solution designs the airbag mold assembly as a split structure, with detachable connections via airbag template connecting parts, further improving construction convenience and efficiency.

[0008] Furthermore, a connecting plate is provided at the end of the airbag template connecting part, and the connecting plates of adjacent airbag template connecting parts are detachably connected by bolts. Based on the above technical solution, this technical solution sets the detachable connecting structure of the airbag template connecting part as a bolt connection structure, which not only ensures reliable connection and high adjustment accuracy, but also facilitates easy assembly and disassembly.

[0009] Furthermore, external stiffening ribs are provided on the outer surface of the airbag template body, and internal stiffening ribs are provided in both the airbag template body and the airbag template connection portion. Each internal stiffening rib includes several supporting ribs connecting the inner and outer layers of the airbag, and these supporting ribs are connected by connecting ribs. Ventilation holes are provided on both the supporting ribs and the connecting ribs. Based on the above technical solution, this technical solution not only further enhances the support strength of the airbag template body but also provides a shaping function during installation, facilitating the installation and positioning of the airbag template body before inflation. Particularly noteworthy is that the supporting ribs and connecting ribs can divide the inner cavity of the airbag into several small chambers, which are interconnected through ventilation holes, providing more reliable support.

[0010] Furthermore, the external stiffening ribs are arranged vertically and / or laterally. Based on the above technical solution, this technical solution provides a preferred embodiment, that is, the external stiffening ribs can be arranged vertically along the beam-column joint, or laterally along the beam-column joint, or the external stiffening ribs can be arranged both vertically and laterally. Of course, the external stiffening ribs can also be arranged in other structural forms.

[0011] Furthermore, during formwork erection, the lower half of the inner side of the airbag template body and the inner side of the airbag template connecting part are both in contact with the outer wall of the column cap, the upper end face of the airbag template connecting part is in contact with the bottom wall of the precast beam, and the left and right end faces of the airbag template body are in contact with the side walls of the two precast beams respectively. Based on the above technical solution, this technical solution provides a more preferred implementation method, in which, after the various airbag template bodies are interconnected, they not only surround the outer periphery of the column cap, but also are snapped together with each precast beam.

[0012] Furthermore, the inner cavity of the airbag template body is interconnected with the inner cavity of the airbag template connecting part. There are four airbag template bodies. Each airbag template connecting part is connected to a one-way valve. Each one-way valve is connected to a three-way connector. Two adjacent three-way connectors form a group of connecting connectors. In each group of connecting connectors, the three ports of the first three-way connector are respectively connected to the one-way valve, pressure gauge, and second three-way connector of one airbag template connecting part. The three ports of the second three-way connector are respectively connected to the one-way valve, first connecting connector, and inflation line of another airbag template connecting part.

[0013] Furthermore, during formwork erection, adjacent airbag template bodies are first connected through adjacent airbag template connecting parts. Then, each airbag template body and airbag template connecting part is inflated through the inflation pipeline, while the pressure value is monitored by a pressure gauge. When the pressure reaches the target pressure, inflation is stopped. Then, the T-joint, pressure gauge, and inflation pipeline are removed, and the connection structure of the adjacent airbag template connecting parts is tightened a second time. Then, concrete is poured in the space enclosed by the column cap, airbag template body, and precast beam. After the concrete strength reaches the requirements, the airbag mold components are removed and reused in other parts.

[0014] Furthermore, when installing the frame columns, the main frame beams are installed first, and after they are placed on the column caps and positioned and corrected, the secondary frame beams are then installed.

[0015] Furthermore, the installation sequence of the precast beams is as follows: measurement and layout, on-site marking and positioning, marking out the edge positions of each precast beam to control the installation accuracy of the precast beams; before placement, the support points are grouted with 1:2 cement mortar to ensure that the contact surface between the precast beam and the support point is completely flat and stressed; after the precast beams are installed in place, the distance between the precast beam and the support floor slab between the precast beam and the upper surface of the precast beam is re-measured with a steel tape measure to ensure that the relative spacing error is within ±1cm.

[0016] Compared with existing technologies, this invention uses an airbag mold assembly for formwork support and a corresponding demolding process. This not only simplifies mold making and disassembly but also allows for convenient reuse. The airbag mold assembly is particularly noteworthy for its following features: 1. It does not alter the shape of the node structure; 2. It resists overall deformation after inflation; 3. The outer side can be reinforced with ribs; 4. It is lightweight and standardized; 5. It is easy to assemble and disassemble. Therefore, it avoids the technical problems of complex and difficult operation of the tie structure when using traditional template structures in existing technologies, as well as the technical problems of inconvenient disassembly of the tie structure and limited construction space. Attached Figure Description

[0017] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural schematic diagram of a beam-column joint;

[0019] Figure 2 A perspective view of the construction process using this invention;

[0020] Figure 3 for Figure 2 The main view;

[0021] Figure 4 for Figure 2 Top view;

[0022] Figure 5 for Figure 2 A partial sectional view of the main body of the central airbag template;

[0023] Explanation of icon numbers:

[0024] 1 is the main body of the airbag template, 2 is the connecting part of the airbag template, 3 is the connecting plate, 4 is the bolt, 5 is the external stiffening rib, 6 is the column cap, 7 is the main frame beam, 8 is the secondary frame beam, 9 is the reserved steel bar, 10 is the inflation hole, 11 is the frame column, and 12 is the reserved steel bar. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] A rapid construction method for prefabricated square beam-column joints, wherein the prefabricated square beam-column joint is as follows: Figure 1 and Figure 4 As shown, the structure includes frame column 11, column cap 6, main frame beam 7, and secondary frame beam 8. The column cap 6, main frame beam 7, and secondary frame beam 8 require formwork and concrete pouring to form a prefabricated square beam-column joint.

[0027] The construction steps for the prefabricated square beam-column joint are as follows: First, install the frame column 11 and column cap 6. After the frame column 11 and column cap 6 are installed, install the precast beams. When installing the precast beams, first install the main frame beam 7, and after positioning and correction on the column cap 6, install the secondary frame beam 8 and tie the reserved steel bars 12 for the beam-column joint. Then, proceed with the formwork erection, pouring, and formwork removal in sequence, using airbag mold components for the formwork erection.

[0028] When constructing prefabricated square beam-column joints, this technical solution uses airbag mold components for formwork support and corresponding demolding procedures. Not only is the mold making and disassembly simple, but it can also be easily reused.

[0029] The airbag mold assembly is particularly noteworthy for the following features: 1. It does not alter the shape of the node structure; 2. It resists overall deformation after inflation; 3. The outer side can be reinforced with ribs; 4. It is lightweight and standardized; 5. It is easy to assemble and disassemble. Therefore, it avoids the technical problems of complex and difficult operation of the tie structure when using traditional template structures in the existing technology, as well as the technical problems of inconvenient disassembly of the tie structure and the technical problems of limited construction space.

[0030] Based on the above embodiments, as a preferred embodiment, such as... Figures 2-4 As shown, the airbag mold assembly includes an L-shaped airbag template body 1. The four L-shaped airbag template bodies 1 cooperate with the beams and columns to easily form a cubic or cuboid beam and column joint casting space. It is not only simple in structure and easy to process and manufacture, but also easy to install and disassemble, avoiding the complex technical problems of using an integral airbag construction.

[0031] Airbag template connecting parts 2 are provided on both the left and right sides of the lower end of the airbag template body 1, and adjacent airbag template bodies 1 are detachably connected through adjacent airbag template connecting parts 2. Based on the above technical solution, this technical solution designs the airbag mold assembly as a split structure and connects it detachably through the airbag template connecting parts 2, which can further improve the convenience and efficiency of construction.

[0032] Based on the above embodiments, as a preferred embodiment, a connecting plate 3 is provided at the end of the airbag template connecting part 2, and the connecting plates 3 of adjacent airbag template connecting parts 2 are detachably connected by bolts 4. Based on the above technical solution, this technical solution sets the detachable connection structure of the airbag template connecting part 2 as a bolt connection structure, which not only ensures reliable connection and high adjustment accuracy, but also facilitates easy assembly and disassembly.

[0033] Based on the above embodiments, as a preferred embodiment, such as... Figure 5As shown, external stiffening ribs 5 are provided on the outer surface of the airbag template body 1, and internal stiffening ribs are provided in both the airbag template body 1 and the airbag template connecting part 2. The internal stiffening ribs include several support ribs 13 connecting the inner and outer layers of the airbag, and each support rib 13 is connected by a connecting rib 14. Ventilation holes are provided on both the support ribs 13 and the connecting ribs 14. Based on the above technical solution, this technical solution not only further enhances the support strength of the airbag template body 1, but also provides a shaping function during installation, facilitating the installation and positioning of the airbag template body 1 before inflation.

[0034] Based on the above embodiments, as a preferred embodiment, the external stiffening ribs 5 are arranged vertically and / or laterally. Based on the above technical solutions, this technical solution provides a preferred embodiment, namely, the external stiffening ribs 5 can be arranged vertically along the beam-column joint, or laterally along the beam-column joint, or simultaneously arranged vertically and laterally. Of course, the external stiffening ribs 5 can also be configured in other structural forms.

[0035] Based on the above embodiments, as a preferred embodiment, during formwork erection, the lower half of the inner side of the airbag template body 1 and the inner side of the airbag template connecting part 2 are both in contact with the outer wall of the column cap 6, the upper end face of the airbag template connecting part 2 is in contact with the bottom wall of the precast beam, and the left and right end faces of the airbag template body 1 are in contact with the side walls of the two precast beams respectively. Based on the above technical solution, this technical solution provides a more preferred embodiment, where, after the airbag template bodies 1 are interconnected, they not only surround the outer periphery of the column cap 6 but also are interlocked with each precast beam.

[0036] Based on the above embodiments, as a preferred embodiment, the inner cavity of the airbag template body 1 is interconnected with the inner cavity of the airbag template connecting part 2. There are four airbag template bodies 1. Each airbag template connecting part 2 is connected to a one-way valve. Each one-way valve is connected to a three-way connector. Two adjacent three-way connectors form a group of connecting connectors. In each group of connecting connectors, the three ports of the first three-way connector are respectively connected to the one-way valve, pressure gauge, and second three-way connector of one airbag template connecting part 2. The three ports of the second three-way connector are respectively connected to the one-way valve, first connecting connector, and inflation line of another airbag template connecting part 2.

[0037] Based on the above implementation method, as a preferred implementation method, during formwork erection, adjacent airbag template bodies 1 are first connected through adjacent airbag template connecting parts 2. Then, each airbag template body 1 and airbag template connecting part 2 is inflated through the inflation pipeline, and the pressure value is monitored by the pressure gauge. When the pressure reaches the target pressure, inflation is stopped. Then, the T-joint, pressure gauge and inflation pipeline are removed, and the connection structure of the adjacent airbag template connecting parts 2 is tightened a second time. Then, concrete is poured in the space enclosed by the column cap 6, airbag template body 1 and precast beam. After the concrete strength reaches the requirements, the airbag mold assembly is removed and other parts are reused.

[0038] Based on the above implementation method, as a preferred implementation method, when installing the frame column, the main frame beam 7 is installed first, and after it is placed on the column cap 6 and positioned and corrected, the secondary frame beam 8 is installed.

[0039] Based on the above implementation method, as a preferred implementation method, the installation sequence of the precast beams is as follows: measurement and layout, on-site marking and positioning, marking out the edge position of each precast beam installation, and controlling the installation accuracy of the precast beams; before placement, the support point is grouted with 1:2 cement mortar to ensure that the contact surface between the precast beam and the support point is completely flat and stressed; after the precast beam is installed in place, the distance between the precast beam and the support floor slab between the precast beam and the upper surface of the precast beam is re-measured with a steel tape measure to ensure that the relative distance error is within ±1cm.

[0040] All aspects not detailed in this invention are conventional technical means known to those skilled in the art.

[0041] The above content shows and describes the basic principles, main features, and beneficial effects of the present invention. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A rapid construction method for prefabricated square beam-column joints, comprising the following steps: frame column installation, column cap installation, precast beam installation, beam-column joint reinforcement binding, formwork erection, pouring, and formwork removal, characterized in that: The formwork is constructed using an airbag mold assembly; The airbag mold assembly includes an L-shaped airbag template body (1), and airbag template connecting parts (2) are provided on both the left and right sides of the lower end of the airbag template body (1). Adjacent airbag template bodies (1) can be detachably connected through adjacent airbag template connecting parts (2). The end of the airbag template connecting part (2) is provided with a connecting plate (3), and the connecting plates (3) of adjacent airbag template connecting parts (2) are detachably connected by bolts (4). The outer side of the airbag template body (1) is provided with external stiffening ribs (5), and the airbag template body (1) and the airbag template connecting part (2) are both provided with internal stiffening ribs. The internal stiffening ribs include several support ribs (13) connected between the inner layer of the airbag and the outer layer of the airbag. Each support rib (13) is connected by a connecting rib (14). Ventilation holes are provided on both the support rib (13) and the connecting rib (14). During formwork erection, the lower half of the inner side of the airbag template body (1) and the inner side of the airbag template connecting part (2) are in contact with the outer wall of the column cap (6), the upper end face of the airbag template connecting part (2) is in contact with the bottom wall of the precast beam, and the left and right end faces of the airbag template body (1) are in contact with the side walls of the precast beams on both sides respectively. The inner cavity of the airbag template body (1) is connected to the inner cavity of the airbag template connecting part (2). There are four airbag template bodies (1). Each airbag template connecting part (2) is connected to a one-way valve. Each one-way valve is connected to a three-way connector. Two adjacent three-way connectors form a group of connecting connectors. In each group of connecting connectors, the three ports of the first three-way connector are respectively connected to the one-way valve, pressure gauge and second three-way connector of one airbag template connecting part (2). The three ports of the second three-way connector are respectively connected to the one-way valve, first connecting connector and inflation pipeline of another airbag template connecting part (2). During formwork erection, the adjacent airbag template bodies (1) are first connected through the adjacent airbag template connecting parts (2). Then, each airbag template body (1) and airbag template connecting parts (2) are inflated through the inflation pipeline. At the same time, the pressure value is monitored by the pressure gauge. When the pressure reaches the target pressure, inflation is stopped. Then, the three-way connector, pressure gauge and inflation pipeline are removed, and the connection structure of the adjacent airbag template connecting parts (2) is tightened for the second time. Then, concrete is poured in the space enclosed by the column cap (6), airbag template body (1) and precast beam. After the concrete strength reaches the requirements, the airbag mold components are removed and other parts are reused.

2. The rapid construction method for prefabricated square beam-column joints according to claim 1, characterized in that: The external stiffening ribs (5) are arranged vertically and / or laterally.

3. The rapid construction method for prefabricated square beam-column joints according to any one of claims 1-2, characterized in that: When installing the frame columns, the main frame beam (7) is installed first, and after it is placed on the column cap (6) and positioned and corrected, the secondary frame beam (8) is installed.

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