Steel bar modular connecting device and construction method thereof

Abstract

The invention relates to the technical field of nuclear power building construction, in particular to a steel bar modular connecting device and a construction method thereof. The connecting device comprises first profile steel and second profile steel; the first profile steel comprises a connecting frame and a first connecting plate, the connecting frame is provided with a cavity, an opening is formed in one side of the connecting frame, the first connecting plate is located on the side, away from the opening, of the connecting frame, and the end of the first connecting plate is used for being connected with a reinforcement cage; the second profile steel comprises an inserting plate and a second connecting plate, the inserting plate is inserted into the cavity of the connecting frame through the opening, the second connecting plate is located on the side, away from the first connecting plate, of the inserting plate, and the end of the second connecting plate is used for being connected with another reinforcement cage. The horizontal reinforcing steel bar aligning device solves the horizontal reinforcing steel bar aligning problem and serves as a hoisting tool, the field workload is reduced, meanwhile, the overall rigidity of reinforcing steel bar meshes is improved, deformation caused in the hoisting process is reduced, and the reinforcing steel bar modular construction efficiency and safety are improved.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power building construction, and in particular to a modular steel bar connection device and a construction method thereof. Background Art

[0002] With the development of social productivity and the improvement of scientific and technological levels, large-scale industrial buildings, high-rise buildings, deep foundation pits and other projects have gradually increased, which puts forward higher requirements on the construction efficiency and construction methods of such projects. Modularization and assembly are important design and construction methods that conform to the future development direction. In prefabricated buildings, a large number of building components are produced and processed by workshops and assembled on site, which greatly reduces the original cast-in-place workload, and thus standardizes the design and informatizes the management, improves production efficiency and component quality, reduces production costs, meets the requirements of green buildings, and meets the production concept of energy conservation and environmental protection.

[0003] Modularization refers to the steel plate concrete composite structure or steel structure related to the civil engineering structure that is processed and manufactured in the factory and assembled and installed on site. The steel plate concrete module is a structural module that is processed and manufactured in the factory, assembled and installed on site, and then concrete is poured inside or on top of it to form a composite structure with concrete to jointly bear the external load. Modular construction has the advantages of convenient construction, shortened construction period, and easy production, transportation and installation.

[0004] In nuclear power plants, due to the relatively irregular structure of the plant and the relatively thick wall panels, if the traditional prefabricated structure used in civilian applications is adopted, the weight of the prefabricated components is relatively large, which places high demands on hoisting. In addition, the layout of nuclear power plant buildings is generally relatively compact, and the hoisting area and hoisting capacity of the hoisting equipment are generally limited. Therefore, the use of traditional prefabrication in nuclear power plants has great limitations. In current nuclear power plants, a large number of modular design concepts and construction methods are adopted, but the current price of module construction and installation is relatively high, and the economy is generally average when mass production is not possible.

[0005] Based on this, the nuclear power plant adopts the method of steel cage assembly for construction, which is the best choice to improve construction efficiency and construction economy. It overcomes the shortcomings of prefabricated buildings and modular construction, and has the advantages of both. The embedded items such as steel bars and embedded parts are moved to the processing plant for processing and manufacturing. After the integrated construction of overall transportation, hoisting and installation, the concrete is poured. On the one hand, it embodies the modular construction concept and can speed up the construction progress. On the other hand, the relatively light weight is conducive to hoisting control and reduces the requirements for hoisting sites and equipment.

[0006] In modular steel bar construction, vertical steel bars are connected by mechanical joints (steel sleeves). The deviation caused by the mechanical joint connection will cause vertical deviation of the steel mesh. During the overall binding and hoisting of the steel mesh, the steel mesh will be deformed under the action of its own weight. The horizontal steel bars of two adjacent steel meshes are connected by mechanical steel sections. The vertical deviation and deformation of the steel mesh will cause the elevation of the horizontal steel bars in the mesh to be unable to align, which may cause difficulties in connection.

[0007] At present, there are few patents related to modular steel bars applicable to nuclear power plants. Publication No. CN115613811A proposes a modular construction tooling and method for a straight wall steel cage, which uses a detachable construction tooling to assist the wall layers of steel mesh to be prefabricated off-site into an integral steel cage. The accuracy of the steel bar position is ensured by adding a steel bar limiting structure, but the construction tooling includes a three-dimensional frame skeleton and a steel bar limiting structure, which requires high construction accuracy. Publication No. CN117722029A proposes a steel bar module for the lower A layer of the CV bottom head of the nuclear island. The prefabricated tooling consisting of steel beams, steel columns, column foot plates and lifting ears has a simple structure and high strength. It can withstand the weight of the steel bar module to complete the lifting, and can accurately locate and fix the steel bar position. Publication No. CN220889180U proposes a modular steel bar structure for a pier column, which is fixedly connected at equal intervals between a pier column base frame, several pier column intermediate frames and a pier column top frame by a second steel bar sleeve, and is quickly fixedly connected in a modular manner to form a pier column steel bar structure. The production method is simple, the work efficiency is improved and the accuracy of the pier column steel bar production is ensured. However, this structure is mostly used in municipal and civil projects such as various bridges.

[0008] Therefore, the problems in the prior art mainly include:

[0009] ① Existing technologies are mostly applicable to civil and municipal projects, but are not fully applicable to the special requirements of nuclear power plants.

[0010] ② Traditional prefabricated structures are heavy and have high requirements for lifting, which are not suitable for the compact plant layout of nuclear power plants.

[0011] ③ Modular construction has high cost and average economic efficiency, especially when mass production is not possible.

[0012] ④ The vertical deviation and deformation of the steel mesh make it impossible to align the horizontal steel bar elevations, making connection difficult. Summary of the invention

[0013] In view of the shortcomings of the prior art, the purpose of an embodiment of the present invention is to provide a modular steel bar connection device, which connects the steel mesh through steel sections to solve the problem of horizontal steel bar alignment, and serves as a lifting tool to reduce on-site workload. At the same time, it increases the overall stiffness of the steel mesh, reduces the deformation caused by the lifting process, and improves the efficiency and safety of modular steel bar construction.

[0014] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0015] A modular steel bar connection device, used to connect two adjacent steel bar cages, comprising: a first steel section and a second steel section; the first steel section comprises a connection frame and a first connection plate, the connection frame has a cavity, one side of the connection frame has an opening, the first connection plate is located on the side of the connection frame away from the opening, and the end of the first connection plate is used to connect to the steel bar cage; the second steel section comprises a plug plate and a second connection plate, the plug plate is plugged into the cavity of the connection frame through the opening, the second connection plate is located on the side of the plug plate away from the first connection plate, and the end of the second connection plate is used to connect to another steel bar cage.

[0016] Optionally, the edge of the steel cage has horizontal main bars, and the first connecting plate is inserted between two of the horizontal main bars and fixedly connected to the two horizontal main bars.

[0017] Optionally, the first connecting plate and the horizontal main reinforcement are fixed together by lap welding.

[0018] Optionally, there are two first connecting plates, which are arranged in parallel and are both connected to the horizontal main reinforcement of the steel cage.

[0019] Optionally, the cross-section of the connecting frame is rectangular, the two first connecting plates are located at two adjacent vertices of the rectangular connecting frame, and the two first connecting plates are respectively collinear with two opposite sides of the rectangular connecting frame.

[0020] Optionally, the second connecting plate is C-shaped, including a web and two wing plates, the two wing plates are located on both sides of the web and are perpendicular to the web, and the two wing plates are connected to another steel cage.

[0021] Optionally, the edge of another steel cage has horizontal main bars, and the wing plate of the second connecting plate is inserted between two of the horizontal main bars and fixedly connected to the two horizontal main bars.

[0022] Optionally, the plug plate is T-shaped, including an embedded plate and a transition plate, the embedded plate and the transition plate are perpendicular, one end of the transition plate is connected to the embedded plate, and the other end of the transition plate is connected to the web of the second connecting plate.

[0023] Optionally, the embedded plate of the second steel section is installed in the cavity of the connection frame of the first steel section, and the transition plate of the second steel section is installed in the opening of the connection frame of the first steel section.

[0024] The embodiment of the present invention further provides a construction method of the modular steel bar connection device as described above, comprising:

[0025] Prefabricate steel cages at the processing site and transport them to the lifting site;

[0026] Connect the horizontal main reinforcement of the steel cage with the first steel section and the second steel section;

[0027] The steel cage is turned over and hoisted to the designated position, and the steel cage is in place and adjusted so that the first steel and the second steel are connected by the plug-in plate;

[0028] The formed steel cage is poured with concrete.

[0029] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0030] The first steel section and the second steel section of the connection device are connected through a connection frame and a plug plate, which can effectively ensure the stable connection and precise docking between the steel cages. The horizontal main bars of adjacent steel cages are connected by steel sections to ensure that the spatial position between the two steel cages is fixed. The connection process is simple and has good tensile strength. It can withstand various loads generated during construction and avoid displacement or deformation caused by operations such as hoisting. It can solve the problem of horizontal steel bars being unable to align and reduce on-site workload. In addition, the steel sections can increase the overall rigidity of the steel mesh, reduce deformation caused by the hoisting process, and improve the safety of modular steel construction.

[0031] Advantages of additional aspects of the present invention will be given in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In addition, the spacing or size between the components is exaggerated to show the positions of the components, and the schematic diagram is only used for illustration.

[0033] Figure 1 is a schematic diagram of a connection device provided by an embodiment of the present invention;

[0034] In the figure: 1, horizontal main reinforcement; 2, first steel section; 21, first connecting plate; 22, connecting frame; 3, second steel section; 31, second connecting plate; 32, transition plate; 33, embedded plate; DETAILED DESCRIPTION

[0035] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] Example 1

[0037] In order to solve the technical problems mentioned in the background technology, this embodiment proposes a new modular steel bar connection device for nuclear power projects, which considers connecting the steel meshes through steel sections to solve the problem of horizontal steel bars being unable to align, while reducing the workload on site. In addition, the steel sections are used as lifting tools for the steel meshes, which can increase the overall rigidity of the steel meshes, reduce the deformation caused by the lifting process, and improve the safety of the integrated assembly of the steel cage.

[0038] like Figure 1 As shown, the connecting device includes a first steel section 2 and a second steel section 3; the first steel section 2 includes a connecting frame 22 and a first connecting plate 21, the connecting frame 22 has a cavity, one side of the connecting frame 22 has an opening, the first connecting plate 21 is located on the side of the connecting frame 22 away from the opening, and the end of the first connecting plate 21 is used to connect to the steel cage; the second steel section 3 includes a plug plate and a second connecting plate 31, the plug plate is plugged into the cavity of the connecting frame 22 through the opening, the second connecting plate 31 is located on the side of the plug plate away from the first connecting plate 21, and the end of the second connecting plate 31 is used to connect to another steel cage.

[0039] The first steel section 2 includes a connection frame 22 and a first connection plate 21. The connection frame 22 is a rectangular frame structure with an inner cavity and an opening. The material of the connection frame 22 is steel, usually high-quality carbon steel or alloy steel, to ensure strength and durability. The design of the opening allows the plug-in plate to be inserted into the connection frame 22. The second steel section 3 includes a plug-in plate and a second connection plate 31. The plug-in plate is inserted into the cavity of the connection frame 22 through the opening, and the design of the plug-in plate ensures a good match with the first steel section 2.

[0040] The edge of the steel cage has horizontal main bars 1, and the first connecting plate 21 is inserted between the two horizontal main bars 1 and fixedly connected to the two horizontal main bars 1 to ensure the stability of the connection. The connection of the horizontal main bars 1 is the key to the overall stability of the steel cage. By inserting the first connecting plate 21 between the horizontal main bars 1 and fixing it, the strength and stability of the steel cage during hoisting and later construction can be ensured.

[0041] Specifically, the first connecting plate 21 and the horizontal main reinforcement 1 are connected and fixed together by lap welding. The steel mesh (single layer / double layer) is connected to two steel sections by fillet welds. Lap welding is performed by overlapping the first connecting plate 21 and the horizontal main reinforcement 1 with each other and then fixing them by welding. The lap welding position is located at the intersection of the first connecting plate 21 and the horizontal main reinforcement 1. The lap welding method can ensure uniform strength of the connection and avoid construction risks caused by loose connections. At the same time, lap welding is also convenient for construction personnel to perform on-site operations, reducing the difficulty of construction.

[0042] There are two first connection plates 21, which are arranged in parallel and are both connected to the horizontal main reinforcement 1 of the steel cage. The two parallel first connection plates 21 improve the connection stability between the steel cage and the steel section, and prevent the structural asymmetry problem that may be caused by unilateral connection. The parallel design of the two connection plates helps to evenly distribute the connection force and improve the safety during lifting.

[0043] The cross section of the connecting frame 22 is rectangular, and the two first connecting plates 21 are located at two adjacent vertices of the rectangular connecting frame 22, and the two first connecting plates 21 are respectively collinear with two opposite sides of the rectangular connecting frame 22. The design of the rectangular frame enables it to effectively bear the weight of the first connecting plates 21 and provide sufficient supporting force.

[0044] The second connecting plate 31 is C-shaped, including a web and two wing plates, the two wing plates are located on both sides of the web and are perpendicular to the web, and the two wing plates are connected to another steel cage. The design of the C-shaped structure can effectively disperse the connection force between the steel cage and the steel section, avoiding damage to the material caused by concentrated force. The design of the two wing plates ensures that the steel cage remains balanced during hoisting, improving construction safety.

[0045] The edge of another steel cage also has horizontal main bars 1, and the wing plate of the second connecting plate 31 is inserted between the two horizontal main bars 1 and fixedly connected to the two horizontal main bars 1. The connection method of the first connecting plate 21 and the horizontal main bars 1 is the same.

[0046] like Figure 1 As shown, the plug plate is T-shaped, including an embedded plate 33 and a transition plate 32, the embedded plate 33 and the transition plate 32 are perpendicular, one end of the transition plate 32 is connected to the embedded plate 33, and the other end of the transition plate 32 is connected to the web of the second connecting plate 31. The T-shaped plug plate design facilitates installation, ensures stable connection of the steel section, and improves the convenience and stability of construction.

[0047] The embedded plate 33 of the second steel section 3 is installed in the cavity of the connection frame 22 of the first steel section 2, and the transition plate 32 of the second steel section 3 is installed in the opening of the connection frame 22 of the first steel section 2. This design ensures a stable fit between the plug plate and the connection frame 22, and avoids structural deformation or looseness caused by improper installation.

[0048] Example 2

[0049] This embodiment provides a construction method of the modular steel bar connection device as described in Embodiment 1, comprising:

[0050] Prefabricate steel cages at the processing site and transport them to the lifting site;

[0051] The horizontal main reinforcement 1 of the steel cage is connected to the first steel section 2 and the second steel section 3 by lap welding to achieve equal strength connection;

[0052] The steel cage is turned over and hoisted to the designated position. The steel cage is in place and adjusted so that the first steel 2 and the second steel 3 are connected by the plug-in plate. According to the extrusion between the steel plates of the first steel 2 and the second steel 3, the equal strength connection of the horizontal main reinforcement 1 is ensured;

[0053] The formed steel cage is poured with concrete, and exhaust holes and other measures are reserved as needed to ensure the density of the concrete in the cavity.

[0054] This construction method prefabricates the steel cage at the processing site, connects the steel sections, and performs hoisting, positioning and concrete pouring. The steel cage is quickly installed and concrete pouring is completed, solving the problem of horizontal steel bar alignment. It also serves as a hoisting tool to reduce on-site workload, while increasing the overall stiffness of the steel mesh, reducing deformation caused by the hoisting process, and improving the efficiency and safety of modular steel construction.

[0055] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A modular steel bar connection device for connecting two adjacent steel bar cages, characterized in that: include: The first steel section and the second steel section; The first steel section includes a connection frame and a first connection plate, the connection frame has a cavity, one side of the connection frame has an opening, the first connection plate is located on a side of the connection frame away from the opening, and an end of the first connection plate is used to connect to the steel cage; The second steel section includes a plug plate and a second connecting plate, the plug plate is plugged into the cavity of the connecting frame through an opening, the second connecting plate is located on a side of the plug plate away from the first connecting plate, and an end of the second connecting plate is used to connect another steel cage.

2. The modular steel bar connection device according to claim 1, characterized in that: The edge of the steel cage is provided with horizontal main bars, and the first connecting plate is inserted between two of the horizontal main bars and is fixedly connected to the two horizontal main bars.

3. The modular steel bar connection device according to claim 2, characterized in that: The first connecting plate and the horizontal main reinforcement are fixed together by overlapping and welding.

4. The modular steel bar connection device according to claim 2, characterized in that: There are two first connecting plates, which are arranged in parallel and are both connected to the horizontal main reinforcement of the steel cage.

5. The modular steel bar connection device according to claim 4, characterized in that: The cross section of the connecting frame is rectangular, the two first connecting plates are located at two adjacent vertices of the rectangular connecting frame, and the two first connecting plates are respectively collinear with two opposite sides of the rectangular connecting frame.

6. The modular steel bar connection device according to claim 1, characterized in that: The second connecting plate is C-shaped and includes a web and two wing plates. The two wing plates are located on both sides of the web and are perpendicular to the web. The two wing plates are connected to another steel cage.

7. The modular steel bar connection device according to claim 6, characterized in that: The edge of another steel cage is provided with horizontal main bars, and the wing plate of the second connecting plate is inserted between the two horizontal main bars and fixedly connected with the two horizontal main bars.

8. The modular steel bar connection device according to claim 6, characterized in that: The plug plate is T-shaped and includes an embedded plate and a transition plate. The embedded plate and the transition plate are perpendicular to each other. One end of the transition plate is connected to the embedded plate, and the other end of the transition plate is connected to the web of the second connecting plate.

9. The modular steel bar connection device according to claim 8, characterized in that: The embedded plate of the second steel section is installed in the connection frame cavity of the first steel section, and the transition plate of the second steel section is installed in the connection frame opening of the first steel section.

10. A construction method of the modular steel bar connection device according to any one of claims 1 to 9, characterized in that: include: Prefabricate steel cages at the processing site and transport them to the lifting site; Connect the horizontal main reinforcement of the steel cage with the first steel section and the second steel section; The steel cage is turned over and hoisted to the designated position, and the steel cage is in place and adjusted so that the first steel and the second steel are connected by the plug-in plate; The formed steel cage is poured with concrete.

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