Plate-beam connecting joint and construction method thereof

Abstract

The invention provides a plate-beam connecting joint and a construction method thereof, and relates to the technical field of prefabricated buildings. According to the plate-beam connecting joint and the construction method thereof, the plate-beam connecting joint comprises prefabricated plate bodies, a middle span beam and side span beams, each prefabricated plate body comprises a prefabricated frame, a first surface rib is arranged on the upper portion of the interior of each prefabricated frame, a first bottom rib is arranged on the lower portion of the interior of each prefabricated frame, and the number of the prefabricated plate bodies is two; secondary pouring areas are arranged between the two prefabricated slab bodies and the two sides of the middle span beam correspondingly, second surface ribs are arranged in the secondary pouring areas, and additional lap joint steel bars are arranged at the positions, close to the upper ends of the second surface ribs, in the secondary pouring areas. Connection is conducted in the secondary pouring area through the additional lap joint steel bars, the contact area of connecting points can be enlarged, the secondary pouring area formed after the prefabricated slab and the middle span beam or the side span beam are combined facilitates pouring of concrete in the groove, additional formwork building is not needed, and the working efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building technology, specifically to a slab-beam connection node and its construction method. Background Technology

[0002] Prefabricated construction refers to the pre-processing of building components and materials in a factory, followed by on-site assembly. The components are then connected using methods such as post-cast concrete or other connection techniques to form the building. In prefabricated construction, to achieve coordinated operation of the entire building structure and improve its overall stability and load-bearing capacity, beams, as the main load-bearing structure, play a role in transferring loads, while slabs are responsible for covering and supporting the building's floors or roof. The design and construction quality of the connection structures directly affect the safety and stability of the entire building structure.

[0003] In existing technologies, the connection process between precast slabs and precast beams generally requires the first setup of a formwork support structure on site, followed by reinforcement placement and pouring. The entire connection process is relatively complex. Even when using composite slabs to connect with precast beams, formwork support and reinforcement binding are still required below the composite slabs. This may not only make it difficult to improve work efficiency but also increase production costs. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a slab-beam connection node and its construction method. By using additional lapped steel bars for connection in the secondary pouring area, the contact area of ​​the connection point is significantly increased, which is equivalent to cast-in-place. Furthermore, the secondary pouring area formed after the precast slab and precast beam are combined facilitates the direct pouring of concrete in the trench without the need for additional formwork, which not only simplifies the process but also improves work efficiency.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: a slab-beam connection node, comprising a precast slab body, an intermediate span beam and an edge span beam, wherein the precast slab body comprises a precast frame, wherein a first top reinforcement is provided inside the precast frame at the upper part, and a first bottom reinforcement is provided inside the precast frame at the lower part;

[0008] The precast slab body is provided in two parts. A secondary casting area is provided between the two precast slab bodies and the two sides of the intermediate span beam. A second reinforcement is provided inside the secondary casting area. An additional lapped reinforcement is provided inside the secondary casting area near the upper end of the second reinforcement.

[0009] Preferably, the intermediate span beam includes cast-in-place beams, fully precast beams, semi-precast beams, steel beams, and shear walls.

[0010] Preferably, the intermediate span beam is connected to the additional lapped reinforcement by lap splicing, and the steel beam in the intermediate span beam is connected to the additional lapped reinforcement by studs.

[0011] Preferably, the thickness of the precast slab body is greater than or equal to 100mm, the height of the secondary casting area is greater than or equal to 60mm, the length of the additional lapped reinforcement is twice the length of the longitudinal tensile reinforcement plus 40mm, and the distance between the two ends of the additional lapped reinforcement and the two precast slab bodies is greater than or equal to 10mm.

[0012] A construction method for a slab-beam connection node specifically includes the following steps:

[0013] First, stone blocks are placed on the designated foundation to ensure a flat and stable base. Then, scaffolding is erected on top of the stone blocks and its stability is ensured. On this basis, the required intermediate span beams are laid. Next, the first precast slab is hoisted and placed smoothly onto the precast beams using a lifting device. The above steps are repeated to hoist the second precast slab, ensuring the distance and position between the two slabs are accurate. Next, the two precast slabs are leveled using a level or other tools to ensure flatness. Then, welding work begins, binding the internal reinforcement bars of adjacent precast slabs together, and simultaneously binding additional lapped reinforcement bars to the first internal reinforcement bars of adjacent precast slabs. After binding, the binding quality is checked to ensure a firm and stable connection. At this point, secondary concrete is poured into the secondary pouring area to fill the reserved gaps. After the concrete has solidified, the connection work is checked to ensure the structure is robust and meets design requirements.

[0014] (III) Beneficial Effects

[0015] This invention provides a plate-beam connection node and its construction method. It has the following beneficial effects:

[0016] This invention provides a slab-beam connection node and its construction method. The connection structure between the precast slab and the precast beam can be used to construct prefabricated buildings. During the connection process, additional lapped steel bars are used to connect, which significantly increases the contact area of ​​the connection point and greatly improves the connection effect. Furthermore, after the connection, the secondary pouring area formed between the precast slab and the precast beam allows concrete to be poured directly inside without the need for additional formwork. This not only simplifies the process and improves work efficiency but also reduces production costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure after the precast slab body and the intermediate span beam of the present invention are connected;

[0018] Figure 2 This is a schematic diagram of the structure after the precast slab body and the side span beam of the present invention are connected.

[0019] Among them, 1. Precast slab body; 2. Second reinforcement bar; 3. Additional lap reinforcement bar; 4. Secondary pouring area; 5. Intermediate span beam; 6. Side span beam; 101. Precast frame; 102. First reinforcement bar; 103. First bottom reinforcement bar. Detailed Implementation

[0020] 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.

[0021] Example 1

[0022] like Figure 1-2 As shown, an embodiment of the present invention provides a slab-beam connection node, including a precast slab body 1, an intermediate span beam (wall) 5 and an edge span beam (wall) 6. The precast slab body 1 includes a precast frame 101, with a first top reinforcement 102 arranged in the upper part of the precast frame 101 and a first bottom reinforcement 103 arranged in the lower part of the precast frame 101.

[0023] Specifically, in the above-described embodiment, the precast slab body 1 is tightly connected to the first top reinforcement 102 and the first bottom reinforcement 103 inside the slab-beam connection point, thereby significantly improving the connection effect of the precast slab body 1. Simultaneously, connecting the first top reinforcement 102 to the second top reinforcement 2 within the secondary casting area 4 further enhances the connection effect of the slab-beam.

[0024] There are two precast slab bodies 1. The two precast slab bodies 1 are respectively set between the two sides of the intermediate span beam (wall) 5 and the secondary casting area 4. The secondary casting area 4 is set with a second reinforcement 2. The secondary casting area 4 is set with an additional lapped reinforcement 3 near the upper end of the second reinforcement 2.

[0025] Specifically, in the above-described embodiment, the connection effect is further improved by connecting the additional lapped steel bars 3 to the precast slabs on both sides.

[0026] The intermediate span beam (wall) 5 includes cast-in-place beams, fully precast beams, semi-precast beams, steel beams, and shear walls;

[0027] Specifically, in the above-described embodiments, the precast slab body 1 can be connected to various intermediate span beams (walls) 5, including cast-in-place beams, fully precast beams, semi-precast beams, steel beams, and shear walls, thereby improving the application adaptability of the precast slab.

[0028] The intermediate span beam (wall) 5 is connected to the additional lap reinforcement 3 by tying and lapping. The steel beam in the intermediate span beam (wall) 5 is connected to the additional lap reinforcement 3 by studs. The thickness of the precast slab body 1 is greater than or equal to 100mm. The height of the secondary pouring area 4 is greater than or equal to 60mm. The length of the additional lap reinforcement 3 is twice the length of the longitudinal tensile reinforcement plus 40mm. The distance between the two ends of the additional lap reinforcement 3 and the two precast slab bodies 1 is greater than or equal to 10mm.

[0029] Specifically, in the above specific embodiments, after connecting the intermediate cast-in-place beam with the additional lapped steel bars 3, a better connection effect can be formed in the secondary pouring area 4. At the same time, the process of fixing the formwork is eliminated, which improves work efficiency. Finally, the additional lapped steel bars 3 can greatly improve the stability of the connection between the precast slab and the precast beam, and the strength of the connection can be further improved by pouring concrete in the secondary pouring area 4.

[0030] Example 2

[0031] Reference Figure 2 This invention provides a slab-beam connection node, including a precast slab body 1 and a side span beam (wall) 6. The precast slab body 1 includes a precast frame 101. A first top reinforcement 102 is provided at the upper part of the precast frame 101, and a first bottom reinforcement 103 is provided at the lower part of the precast frame 101. Only one precast slab body 1 is provided. The precast slab body 1 is riveted to the top reinforcement of the side span beam (wall) 6, and a secondary casting area 4 is provided between them. A second top reinforcement 2 is provided inside the secondary casting area 4, and an additional lapped reinforcement 3 is provided inside the secondary casting area 4 near the upper end of the second top reinforcement 2.

[0032] Specifically, in the above specific embodiments, when connecting a single precast slab body 1 with the side span beam (wall) 6, the connection effect between the precast slab body 1 and the side span beam (wall) 6 can still be improved by adding lapped steel bars 3 and secondary pouring area 4, and the process of fixing the template is saved, improving work efficiency and the versatility of this connection node is improved.

[0033] In performing the precast slab connection task, this invention first sets up stone blocks above the predetermined foundation to ensure a flat and stable foundation. Then, scaffolding is erected above the stone blocks and its stability is ensured. Based on this, intermediate span beams (walls) 5 corresponding to the requirements are laid. Next, the first precast slab body 1 is hoisted and placed smoothly on the precast beam using a lifting device. The above steps are repeated to hoist the second precast slab body 1, ensuring the accurate distance and position between the two slab bodies. Next, the two precast slab bodies 1 are leveled, using a level or other tools to ensure flatness. Then, welding work is carried out, binding the internal reinforcement bars of adjacent precast slab bodies 1 together, and simultaneously binding the additional lapped reinforcement bars 3 to the first internal reinforcement bars 102 of the adjacent precast slab body 1. After binding, the binding quality is checked to ensure a firm and stable connection. At this time, secondary concrete is poured into the secondary pouring area 4 to fill the reserved gaps. After the concrete solidifies, the connection work is checked to ensure the structure is firm and meets design requirements.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A slab-beam connection node, comprising a precast slab body (1), an intermediate span beam (5), and an end span beam (6), characterized in that: The precast slab body (1) includes a precast frame (101), a first rib (102) is provided in the upper part of the precast frame (101), and a first bottom rib (103) is provided in the lower part of the precast frame (101). There are two precast slab bodies (1). The two precast slab bodies (1) are respectively provided with a secondary casting area (4) between the two sides of the intermediate span beam (5). The secondary casting area (4) is provided with a second reinforcement (2). The secondary casting area (4) is provided with an additional lapped reinforcement (3) near the upper end of the second reinforcement (2).

2. A plate-beam connection node according to claim 1, characterized in that: The intermediate span beam (5) includes cast-in-place beams, fully precast beams, semi-precast beams, steel beams, and shear walls.

3. A plate-beam connection node according to claim 1, characterized in that: The intermediate span beam (5) is connected to the additional lapped steel bar (3) by tying and lapping, and the steel beam in the intermediate span beam (5) is connected to the additional lapped steel bar (3) by studs.

4. A plate-beam connection node according to claim 1, characterized in that: The thickness of the precast slab body (1) is greater than or equal to 100mm, the height of the secondary casting area (4) is greater than or equal to 60mm, the length of the additional lapped steel bar (3) is twice the length of the longitudinal tensile steel bar plus 40mm, and the distance between the two ends of the additional lapped steel bar (3) is greater than or equal to 10mm from the two precast slab bodies (1).

5. A construction method for a slab-beam connection node, characterized in that, Specifically, the following steps are included: First, stone blocks are set on the predetermined foundation to ensure that the foundation is flat and stable. Then, scaffolding is erected on the stone blocks and its stability is ensured. On this basis, intermediate span beams (5) corresponding to the requirements are laid. Then, the first precast slab body (1) is hoisted and placed on the precast beam with a hoisting tool. The above steps are repeated to hoist the second precast slab body (1) to ensure that the distance and position between the two slab bodies are accurate. Next, the two precast slab bodies (1) are leveled and the flatness is ensured by using a level or other tools. Then, welding work is carried out to tie the internal reinforcement of the adjacent precast slab bodies (1) into one piece. At the same time, the additional lapped steel bars (3) are tied together with the first internal reinforcement (102) of the adjacent precast slab bodies (1). After the binding is completed, the binding quality is checked to ensure that the connection is firm and stable. At this time, the concrete is poured into the secondary pouring area (4) to fill the reserved gap. After the concrete solidifies, the connection work is checked and the structure is ensured to be firm and meet the design requirements.

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