A connecting structure of a beam and a column of a fabricated building

Abstract

The utility model provides a kind of connecting structure of girder and column of fabricated building, including foundation column pier, prefabricated concrete column and prefabricated concrete girder. Pier column box section steel pipe is embedded in foundation column pier, prefabricated concrete column embeds upper end box section steel pipe, and its lower end is inserted into pier column box section steel pipe and is fixed by bolt;Box section steel pipe circumferential side welds U-shaped steel mortise, and prefabricated concrete girder end portion embeds T-shaped steel tenon, and after insertion steel mortise, it is realized mortise and tenon connection by bolt and welding. High-strength concrete is cast in situ after formwork is supported at node, and form steel reinforced concrete force component is formed. The structure is convenient for installation and adjusts perpendicularity, ensures reliable connection, improves node integrity and seismic performance, simultaneously optimizes concrete flow path, guarantees pouring compactness, significantly improves construction efficiency and structural safety.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated buildings, specifically to a connection structure between the ground beam and the column of a prefabricated building. Background Technology

[0002] With the continuous advancement of industrialized construction and green building concepts, prefabricated concrete structures have been widely used in residential, public buildings, and infrastructure projects due to their advantages such as fast construction speed, less on-site wet work, and controllable quality. In prefabricated frame structure systems, the connection nodes between columns and ground beams or foundations are key components that determine the overall structural safety and seismic performance.

[0003] However, existing technologies for connecting precast concrete columns to foundations and ground beams still have many shortcomings: Traditional prefabricated joints often employ methods such as pre-reserved steel sleeve grouting, post-cast zone lap splicing, or pre-embedded steel plate welding. However, these methods often suffer from problems such as insufficient connection stiffness, unclear force transmission path, high construction accuracy requirements, and susceptibility to on-site operating conditions, making it difficult to guarantee the integrity and ductility of the joint under extreme loads such as earthquakes.

[0004] If a rigid connection is used between the column and the foundation during the hoisting and placement of precast components, there is a lack of effective adjustment space. This can easily lead to verticality deviation due to manufacturing or installation errors, which in turn affects the structural load-bearing performance and may even require rework, thus reducing construction efficiency.

[0005] For connection joints that require post-cast concrete sealing, existing structures often suffer from complex internal cavities, poor ventilation, or restricted grout flow paths, resulting in loose concrete filling, weak areas, and reduced load-bearing capacity and durability of the joints.

[0006] Some existing connection methods rely on a large amount of on-site formwork, steel bar binding and concrete pouring, which goes against the original intention of prefabricated buildings in factories and on-site assembly, making it difficult to achieve efficient, dry or semi-dry construction.

[0007] Therefore, there is an urgent need for a new type of prefabricated ground beam, column and foundation connection structure that can ensure structural safety and reliability while taking into account ease of installation, flexibility of adjustment and quality of concrete pouring in joint areas, so as to truly give full play to the technical advantages of prefabricated buildings. Utility Model Content

[0008] The main objective of this invention is to provide a connection structure between the ground beam and the column in prefabricated buildings, thereby solving the problems mentioned in the background art.

[0009] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: including a connection node on a precast concrete column connecting the foundation column pier and the precast concrete ground beam; A pier column box-shaped steel pipe is pre-embedded on the foundation column pier at the position corresponding to the precast concrete column. The upper end of the box-shaped steel pipe in the connection node is pre-embedded at the end of the precast concrete column, and the lower end is inserted into the pier column box-shaped steel pipe. It is then connected and fixed by multiple cross-inserted bolts. A steel mortise is fixed on the box-shaped steel pipe on the side opposite to the precast concrete ground beam. A steel tenon is pre-embedded at the end of the precast concrete ground beam. The steel tenon is inserted into the steel mortise for tenon-tenon connection and is fixed by multiple through bolts.

[0010] Preferably, one end of the steel tenon is an I-beam structure including an upper flange plate, a lower flange plate, and a web plate connecting the two. It is welded and fixed to the longitudinal reinforcement of the precast concrete ground beam and cast integrally. The other end extends out of the precast concrete ground beam and is a T-shaped structure including an upper flange plate and a web plate. Its web plate is inserted into the steel mortise, and the upper flange plate is welded and fixed against the steel mortise.

[0011] Preferably, the steel mortise is a U-shaped structure including two webs on the left and right sides and a lower flange plate connecting the two, the ends of which are welded to the side wall of the box-shaped steel pipe; The web of the steel tenon is inserted between the left and right webs in the steel mortise, and the upper flange of the steel tenon abuts against the left and right webs in the steel mortise and is welded and fixed.

[0012] Preferably, the web of the steel tenon and the left and right webs of the steel mortise are provided with multiple corresponding through slots, and the steel tenon and the steel mortise are fixedly connected by inserting multiple bolts into the through slots.

[0013] Preferably, the bottom of the web of the steel tenon and the top of the left and right webs of the steel mortise are provided with grout passages for sealing the flow of cast-in-place concrete at the connection joint in the later stage.

[0014] Preferably, a pier box-shaped steel pipe is pre-embedded on the foundation column pier at the position corresponding to each precast concrete column. The lower half of the pier box-shaped steel pipe is pre-embedded in the foundation column pier and is welded and fixed to it with the longitudinal reinforcement and cast into a whole. A positioning steel plate is fixed in the middle of the box-shaped steel pipe, and multiple reinforcing ribs are fixed between the upper periphery of the positioning steel plate and the box-shaped steel pipe. The lower end of the box-shaped steel pipe is inserted into the box-shaped steel pipe of the pier column, and the positioning steel plate is abutted against the box-shaped steel pipe of the pier column and welded to fix it.

[0015] Preferably, the box-shaped steel pipe and the pier box-shaped steel pipe are provided with multiple corresponding through grooves on their periphery, and the box-shaped steel pipe and the pier box-shaped steel pipe are fixedly connected by multiple bolts inserted into the through grooves in a cross manner.

[0016] Preferably, the upper end of the box-shaped steel pipe is pre-embedded in the precast concrete column and welded and fixed to it as a whole for casting. A grouting pipe and an exhaust pipe are pre-embedded between the outside of the precast concrete column and the inside of the box-shaped steel pipe. Concrete is poured into the box-shaped steel pipe and the pier column box-shaped steel pipe through the grouting pipe. A grouting groove is provided on the lower periphery of the box-shaped steel pipe for the flow of the poured concrete.

[0017] This utility model provides a connection structure between the ground beam and column of a prefabricated building, with the following advantages: 1. Enhanced structural stability: By using a combination of box-type steel pipes, steel mortises, and steel tenons, and fixing them with through bolts, a robust connection is achieved between the precast concrete columns, foundation piers, and precast concrete ground beams. This not only enhances the steel structural stability of the entire building frame but also improves the overall seismic performance of the building.

[0018] 2. Precise installation and adjustment capabilities: A large gap is provided between the precast concrete column and the foundation pier, facilitating the adjustment of the verticality of the precast concrete column and the foundation pier during installation. This design greatly improves the flexibility and accuracy during construction, helping to ensure the quality of the building.

[0019] 3. By setting up grout channels and providing corresponding through grooves at the bottom and top of the web in the steel tenon and steel mortise, a good flow channel is provided for the later closed cast-in-place concrete, ensuring that the high-strength concrete at the joint can be fully filled, further enhancing the structural strength and durability of the joint.

[0020] 4. The overall design simplifies on-site construction, reduces wet work, shortens the construction period, and improves construction efficiency. Furthermore, the pre-embedded grouting pipes and venting pipes facilitate the pouring of concrete into the box-shaped steel pipes, ensuring construction quality. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a front view of the connection between the precast concrete column and the foundation column pier of this utility model; Figure 2 This is a utility model Figure 1 Exploded perspective view; Figure 3 This is a front view of the precast concrete beam connection of this utility model; Figure 4 This is a utility model Figure 3 Exploded view; In the diagram: 1. Foundation column pier; 2. Pier column box-type steel pipe; 3. Precast concrete column; 4. Box-type steel pipe; 5. Steel mortise; 6. Positioning steel plate; 7. Precast concrete beam; 8. Steel tenon. Detailed Implementation

[0022] like Figures 1-4 As shown, a connection structure between a ground beam and a column in a prefabricated building includes a connection node on a precast concrete column 3 connecting a foundation column pier 1 and a precast concrete ground beam 7. At the location where the precast concrete column 3 is to be installed in the foundation column pier 1, a pier column box-shaped steel pipe 2 is pre-embedded. The lower end of the box-shaped steel pipe 4 in the connection node is inserted into the pier column box-shaped steel pipe 2 and connected and fixed by through bolts. The upper end of the box-shaped steel pipe 4 is pre-embedded in the precast concrete column 3 and cast integrally. The periphery of the box-shaped steel pipe 4 is welded and fixed with steel mortise grooves 5 at the corresponding positions of the precast concrete ground beam 7. The steel tenon 8 pre-embedded at the end of the precast concrete ground beam 7 is inserted into the steel mortise groove 5 for tenon and tenon connection and connected and fixed by through bolts. Thus, the steel structure of the precast concrete column 3, foundation column pier 1 and precast concrete ground beam 7 are fixedly connected. After the overall building frame steel structure is fixed, it is necessary to support the formwork at the connection node and pour high-strength concrete in place to form a steel-concrete composite load-bearing member at the node. The connection node of the precast concrete ground beam 7 is located 0.6~1m below the ground level.

[0023] Preferably, the steel tenon 8 pre-embedded at the end of the precast concrete beam 7 has an I-beam structure at one end, including an upper flange plate, a lower flange plate, and a web plate connecting the two, which is welded and fixed to the longitudinal reinforcement in the precast concrete ground beam 7 and integrally cast. The other end extends out of the end of the precast concrete ground beam 7 and has a T-shaped structure, including an upper flange plate and a web plate. The steel mortise 5 on the periphery of the box-shaped steel pipe 4 has a U-shaped structure, including two web plates and a lower flange plate connecting the two, with its end welded to the side wall of the box-shaped steel pipe 4. The web plate of the steel tenon 8 is inserted between the two web plates in the steel mortise 5, and the upper flange plate of the steel tenon 8 abuts against the two web plates in the steel mortise 5 and is welded and fixed. The web plates of the steel tenon 8 and the two web plates in the steel mortise 5 have multiple corresponding through slots, and the steel tenon 8 and the steel mortise 5 are fixedly connected by multiple bolts inserted into the through slots.

[0024] In a further preferred embodiment, the bottom of the web of the steel tenon 8 and the top of the left and right webs of the steel mortise 5 are provided with grout passages for sealing the flow of cast-in-place concrete at the connection joint in the later stage.

[0025] Preferably, a pier box-shaped steel pipe 2 is pre-embedded on the foundation column pier 1 at the position corresponding to each precast concrete column 3. The lower half of the pier box-shaped steel pipe 2 is pre-embedded in the foundation column pier 1 and is welded and fixed to it with the longitudinal reinforcement and cast in one piece. A positioning steel plate 6 is welded to the middle of the box-shaped steel pipe 4. Multiple reinforcing ribs are welded between the upper periphery of the positioning steel plate 6 and the box-shaped steel pipe 4. The lower end of the box-shaped steel pipe 4 is inserted into the pier box-shaped steel pipe 2, and the positioning steel plate 6 abuts against the pier box-shaped steel pipe 2 and is welded and fixed.

[0026] The box-shaped steel pipe 4 and the pier box-shaped steel pipe 2 have multiple corresponding through grooves on their sides. The box-shaped steel pipe 4 and the pier box-shaped steel pipe 2 are fixedly connected by multiple bolts inserted into the through grooves in a cross pattern.

[0027] Preferably, the upper end of the box-shaped steel pipe 4 is pre-embedded in the precast concrete column 3 and welded and fixed to it with its longitudinal reinforcement, forming a single integral casting. A grouting pipe and an venting pipe are pre-embedded between the exterior of the precast concrete column 3 and the interior of the box-shaped steel pipe 4. Concrete is poured into the box-shaped steel pipe 4 and the pier column box-shaped steel pipe 2 through the grouting pipe. A grouting groove is provided on the lower periphery of the box-shaped steel pipe 4 for the flow of the poured concrete. A large gap exists between the box-shaped steel pipe 4 and the pier column box-shaped steel pipe 2, facilitating the installation and adjustment of the verticality between the precast concrete column 3 and the foundation column pier 1. After the steel structure is locked, high-strength concrete is poured into the gap to form a steel-concrete composite load-bearing member.

[0028] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A connection structure between ground beams and columns in a prefabricated building, characterized by: Including the connection nodes on the precast concrete column (3) that connect the foundation column pier (1) and the precast concrete ground beam (7); The foundation column pier (1) is pre-embedded with a pier column box-shaped steel pipe (2) at the position corresponding to the precast concrete column (3). The upper end of the box-shaped steel pipe (4) in the connection node is pre-embedded at the end of the precast concrete column (3), and the lower end is inserted into the pier column box-shaped steel pipe (2). It is then connected and fixed by multiple bolts that cross-intersect. A steel mortise (5) is fixed on the side opposite to the precast concrete ground beam (7) on the box-type steel pipe (4). A steel tenon (8) is pre-embedded at the end of the precast concrete ground beam (7). The steel tenon (8) is inserted into the steel mortise (5) for tenon-tenon connection and is fixed by multiple through bolts.

2. The connection structure between the ground beam and column of a prefabricated building according to claim 1, characterized in that: One end of the steel tenon (8) is an I-beam structure including an upper flange plate, a lower flange plate and a web plate connecting the two. It is welded and fixed to the longitudinal reinforcement of the precast concrete ground beam (7) and cast integrally. The other end extends out of the precast concrete ground beam (7) and is a T-shaped structure including an upper flange plate and a web plate. Its web plate is inserted into the steel mortise (5), and the upper flange plate is welded and fixed against the steel mortise (5).

3. The connection structure between the ground beam and column of a prefabricated building according to claim 2, characterized in that: The steel mortise (5) is a U-shaped structure including two webs on the left and right sides and a lower flange plate connecting the two. Its ends are welded to the side wall of the box-shaped steel pipe (4). The web of the steel tenon (8) is inserted between the left and right webs in the steel mortise (5), and the upper flange of the steel tenon (8) abuts against the left and right webs in the steel mortise (5) and is welded and fixed.

4. The connection structure between the ground beam and column of a prefabricated building according to claim 3, characterized in that: The web of the steel tenon (8) and the left and right webs of the steel mortise (5) are provided with multiple corresponding through slots, and the steel tenon (8) and the steel mortise (5) are fixedly connected by inserting multiple bolts into the through slots.

5. The connection structure between the ground beam and column of a prefabricated building according to any one of claims 3 or 4, characterized in that: The bottom of the web of the steel tenon (8) and the top of the left and right webs of the steel mortise (5) are provided with grout grooves for sealing the flow of cast-in-place concrete at the connection joint in the later stage.

6. The connection structure between the ground beam and column of a prefabricated building according to claim 1, characterized in that: in The foundation column pier (1) is pre-embedded with pier column box-shaped steel pipes (2) corresponding to the positions of each precast concrete column (3). The lower half of the pier column box-shaped steel pipes (2) is pre-embedded in the foundation column pier (1) and welded and fixed with its longitudinal reinforcement to form a whole. A positioning steel plate (6) is fixed in the middle of the box-type steel pipe (4), and multiple reinforcing ribs are fixed between the upper periphery of the positioning steel plate (6) and the box-type steel pipe (4); The lower end of the box-shaped steel pipe (4) is inserted into the pier box-shaped steel pipe (2), and the positioning steel plate (6) abuts against the pier box-shaped steel pipe (2) and is welded and fixed.

7. The connection structure between the ground beam and column of a prefabricated building according to claim 6, characterized in that: The box-type steel pipe (4) and the pier box-type steel pipe (2) are provided with multiple corresponding through grooves on their periphery. The box-type steel pipe (4) and the pier box-type steel pipe (2) are fixedly connected by multiple bolts inserted into the through grooves.

8. The connection structure between the ground beam and column of a prefabricated building according to claim 7, characterized in that: The upper end of the box-shaped steel pipe (4) is embedded in the precast concrete column (3) and welded and fixed to the longitudinal reinforcement to form a whole. A grouting pipe and an exhaust pipe are embedded between the outside of the precast concrete column (3) and the inside of the box-shaped steel pipe (4). Concrete is poured into the box-shaped steel pipe (4) and the pier column box-shaped steel pipe (2) through the grouting pipe. A grouting groove is provided on the lower side of the box-shaped steel pipe (4) for the flow of the poured concrete.

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