Node structure of prefabricated assembly type concrete beam column component
By using the wedge tenon structure and the limiting design of metal embedded parts, the problem of unstable connection of precast concrete components is solved, realizing efficient and stable prefabricated connection and meeting the requirements of building industrialization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-03-10
AI Technical Summary
The existing joint structure design of precast concrete components is unreasonable, resulting in unstable connections, low assembly efficiency, and difficulty in meeting stress requirements. Furthermore, the existing mortise and tenon connection structure has poor fit between precast concrete components, making it difficult to achieve efficient connection.
The tenon and mortise structure is adopted, including tenon, mortise, tongue, eyelet and wedge groove. The limiting structure is formed by metal embedded parts, and the connection is enhanced by clamp or bolt assembly to ensure assembly accuracy and stability.
It improves the connection accuracy and stability between precast concrete components, enhances assembly efficiency and stress strength, and is suitable for rapid and stable connection of precast concrete components, meeting the needs of industrialized construction.
Smart Images
Figure CN223984103U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of precast concrete structure technology, specifically to a node structure for precast assembled concrete beam-column components. Background Technology
[0002] Prefabricated assembly technology has advantages such as resource saving, high efficiency, and integrated assembly. It also meets the "four savings and one environmental protection" standard in terms of building energy conservation, which is in line with the development of building industrialization and is a key point for future building development.
[0003] The key to prefabricated structures lies in the design of the connection structure between components. In the construction industry, mortise and tenon joints are a common method of connection in woodwork, where the joints between components are connected by mortise and tenon joints, forming a resilient load-bearing body. However, in the field of prefabricated concrete technology, mortise and tenon joints have many limitations. First, the error range of precast concrete components is large after molding, and the ends of the components are directly cast into tenons or mortises. During on-site assembly, the fit between components is poor, or even impossible to assemble, requiring considerable effort for repair and adjustment. As a result, the connection between components is not as stable as that of cast-in-place structures, and the overall integrity and strength of prefabricated structures are inferior to those of cast-in-place structures. Second, the existing visible mortise and tenon joints of concrete components... Most of the structures use open tenon joints, which make it difficult to place steel bars around the mortise or groove. The structure around the mortise is also weak. If used as a column node, the axial force direction can meet the usage requirements. However, if used as a beam structure, the shear strength is particularly insufficient. The concrete structure needs to have a certain thickness to ensure the load-bearing strength. In the open tenon joint, the dimensions of the tenon and the mortise are in opposition. If the thickness around the mortise is large, the thickness of the tenon must be reduced. Therefore, it is difficult to meet the load-bearing requirements of beam members. Thirdly, after the nodes of the open tenon joint are assembled, they still have relative freedom of movement. Bolts or other hard connections are required to achieve full positioning, which is not conducive to the efficiency of disassembly and assembly during the pre-assembly of the project.
[0004] Therefore, in view of the unreasonable node structure design of existing prefabricated structures, this utility model proposes a node structure suitable for precast concrete components. Utility Model Content
[0005] The purpose of this utility model is to overcome the defects of the prior art and provide a joint structure for prefabricated assembled concrete beam and column components to solve one or more problems mentioned in the background art.
[0006] To achieve the above objectives, the technical solution of this utility model is as follows:
[0007] A joint structure for precast assembled concrete beam-column components, the joint structure including a tenon, a mortise, a wedge groove, a tenon tongue, and a tongue eye located at the connection end of the precast component;
[0008] The precast components are divided along the longitudinal symmetrical center plane to form tenons and mortises. The tenons and mortises are sized to match each other. The tenons and mortises of two adjacent precast components are joined together to form the main structure of the node structure.
[0009] One end of the tenon tongue is embedded in the tenon, and the other end extends outward from the end face of the tenon. The tongue eye is set on the side end face of the joint. The tenon tongue and the tongue eye cooperate to form the first limiting structure of the node structure.
[0010] The wedge groove is located on the mating plane of the tenon and passes through the tenon laterally. The wedge grooves of the two prefabricated components interlock to form a wedge hole. A wedge is inserted into the wedge hole to form the second limiting structure of the node structure.
[0011] Among them, the tongue eye is formed by the tongue eye embedded part pre-embedded in the prefabricated component, and the wedge groove is formed by the wedge groove embedded part pre-embedded in the tenon; the tenon tongue, the tongue eye embedded part and the wedge groove embedded part are metal parts.
[0012] Furthermore, the node structure also includes clamps, which are tightened to the outside of the main structure.
[0013] Furthermore, several connecting holes are provided perpendicular to the mating plane on the tenon. The connecting holes are symmetrically distributed on both sides of the wedge groove. The corresponding connecting holes at adjacent ends of the prefabricated components are connected in series by bolt assemblies. The connecting holes are formed by connecting hole pre-embedded parts embedded in the tenon.
[0014] Furthermore, the tongue eye is a tongue groove, which has an end hole located on the side end face of the joint, and its groove faces the lap direction of the tenon. The cross-section of the tongue eye embedded part is a U-shaped structure.
[0015] Furthermore, the tongue eye is a tongue hole, and the opening of the tongue hole is located on the side end face of the joint. The tongue eye embedded part is cylindrical.
[0016] Furthermore, the outer periphery of the tenon tongue embedded section, tongue eye embedded part, wedge groove embedded part and connecting hole embedded part is integrally formed with several connecting ribs. The connecting ribs extend outward perpendicular to the axial direction, and their ends are bent to form hook-shaped feet. All connecting ribs are distributed in the same plane and are symmetrically distributed in two rows on both sides of the central axis surface.
[0017] Furthermore, a first limiting hole is provided vertically through the tongue on the precast component, and a second limiting hole is provided vertically through the axial direction on the tenon. The first limiting hole and the second limiting hole are fixedly connected by a pin.
[0018] Furthermore, the node structure also includes a cast-in-place protective layer covering the outside.
[0019] Compared with the prior art, the node structure of the precast assembled concrete beam-column component of this utility model has the following beneficial effects:
[0020] This node structure adopts a wedge tenon joint, which is simple and easy to operate for lap assembly. The structural dimensional accuracy in the direction of concrete shrinkage has little impact on the assembly, and the assembly accuracy is easy to ensure in prefabrication. The on-site adaptability between precast concrete components is higher, making it more suitable for the connection between precast concrete components. The connection ends of the precast components are completely identical, which increases the assembly flexibility. The relatively fully limited connection between precast components can be completed quickly, with good assembly stability and friendly on-site construction. In addition, the interlocking assembly in the wedge tenon joint structure is connected by metal embedded parts. The precast casting and curing have little impact on the interlocking limit structure, which enhances the assembly operability and improves the connection and limit strength. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of a first embodiment of the node structure disclosed in this utility model;
[0022] Figure 2 This is a schematic diagram of a second embodiment of the node structure disclosed in this utility model;
[0023] Figure 3 This is another structural schematic diagram of Embodiment 2 of the node structure disclosed in this utility model;
[0024] Figure 4 A schematic diagram of the structure of the tongue hole pre-embedded part;
[0025] Figure 5 A schematic diagram of the structure of the tongue groove embedded part;
[0026] Figure 6 A schematic diagram of the assembly structure of the wedge groove embedded part;
[0027] Figure 7 This is a schematic diagram of the tenon structure.
[0028] In the diagram: 1. Precast component one; 11. First limiting hole; 12. Tenon; 13. Joint; 14. Wedge groove; 15. Tongue hole; 16. Tongue groove; 17. Connecting hole; 2. Precast component two; 3. Tenon tongue; 31. Second limiting hole; 32. Insertion section; 33. Embedded section; 4. Tongue hole embedded part; 41. Connecting rib; 5. Tongue groove embedded part; 6. Wedge groove embedded part; 7. Wedge. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only the preferred embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0030] Example 1: For the rapid and stable assembly of precast concrete column components, this example provides a joint structure for precast assembled concrete beam-column components, such as... Figure 1 , Figure 4 , Figure 6 and Figure 7 As shown, prefabricated component 1 and prefabricated component 2 are connected by a joint structure. The joint structure adopts a wedge tenon structure, which includes a tenon 12, a mortise 13, a wedge groove 14, a tenon tongue 3, and a tenon eye; wherein,
[0031] The tenon 12 and the mortise 13 structure are integrally cast with the main body of the precast component. The precast component is divided along the longitudinal symmetrical center plane, with one side retained to form the tenon 12 and the other side removed to form the mortise 13. The tenon 12 and the mortise 13 are sized to match. The tenon 12 of the precast component 1 overlaps the mortise 13 of the precast component 2. After assembly, the main structure of the node structure is consistent with the main body of the precast component. The main structure is the main load-bearing part of the precast column component. Its main load-bearing direction is axial compressive stress. Compared with the existing open tenon structure precast component node structure, the node main structure of this embodiment is easier to arrange steel bars. Since there is no thin structure around the tenon, it is easier to ensure the structural thickness and meet the strength requirements of the concrete component.
[0032] The tenon 3 further restricts the assembly freedom of the main structure, such as... Figure 7 As shown, the tenon tongue 3 is a metal embedded part. One end of it is embedded in the tenon 12 of the precast component 1, and the other end extends outward from the end face of the tenon 12. The end face of the tenon 12 of the precast component 2 is provided with a tongue-shaped structure. The tongue-shaped structure is provided on the side end face of the joint 13. When the precast component 1 and the precast component 2 are assembled in a columnar manner along the axial direction, the tenon 12 and the joint 13 are joined at the same time. The tenon tongue 3 is inserted into the tongue-shaped structure and cooperates to form the first limiting structure of the node structure, which restricts the various relative degrees of freedom of the precast component on the horizontal plane.
[0033] The assembly of the wedge groove 14 and the wedge 7 completes the full positioning of the node structure. The wedge groove 14 is set on the mating plane of the tenon 12 along the transverse direction. When the precast component 1 and the precast component 2 are assembled in place, the wedge grooves 14 of the two are engaged to form a wedge hole. The wedge 7 is inserted into the wedge hole to form the second positioning structure of the node structure, which restricts the axial relative movement of the precast components.
[0034] In this embodiment, the tongue eye is a tongue hole 15, which is formed by a cylindrical tongue eye pre-embedded part pre-embedded in the prefabricated component, i.e., as shown in the figure. Figure 4 The tongue hole embedded part 4 shown is formed by the wedge groove 14, which is embedded in the tenon 12; the tenon tongue 3, the tongue hole embedded part 4 and the wedge groove embedded part 6 are metal parts.
[0035] Due to the solidification shrinkage of precast concrete components, it is difficult to control the structural dimensions of precast concrete components during casting and prefabrication. Existing open tenon joint structures are difficult to achieve good assembly accuracy. However, the joint structure of this embodiment, due to its lap joint, requires the length of the tenon tongue 3, the mating plane, and the flatness of the side end face of the lap joint 13 to meet the accuracy requirements. It has lower requirements for the dimensional accuracy of cross-sectional structures with large shrinkage, making it easier to ensure during prefabrication and maintenance. In addition, the relative dimensions of the tenon tongue 3, the tongue hole embedded part 4, and the wedge groove embedded part 6 are easy to ensure during casting, and shrinkage has little impact on their relative dimensions. Therefore, from the perspective of casting and assembly, the wedge tenon joint structure of this embodiment is more suitable for connecting precast concrete components than the open tenon joint structure. Furthermore, the connecting ends of the precast components are completely identical, with no difference between tenons and mortises, resulting in greater flexibility during assembly. The relative full-limit connection between precast components can be completed quickly, with good assembly stability and friendly on-site construction.
[0036] As a further technical solution in this embodiment, in order to further enhance the bonding strength of the node structure, a clamp (not shown in the figure) is installed on the outer side of the main structure after the lap joint connection. The clamping force applied by the clamp further improves the overall load-bearing performance of the node structure. Of course, alternatively, the connection of the node structure can also be enhanced by bolt assembly connection, such as... Figure 2 As shown, a number of connecting holes 17 are provided perpendicular to the mating plane on the tenon 12. The connecting holes 17 are symmetrically distributed on both sides of the wedge groove 14. After the assembly is completed, the corresponding connecting holes 17 of the prefabricated component 1 and the prefabricated component 2 are connected by bolt assembly, and the two overlapping tenons 12 are locked by applying pre-tightening force. Similarly, the connecting holes 17 are formed by the connecting hole 17 embedded part embedded in the tenon 12.
[0037] As a further technical solution in this embodiment, such as Figure 4 , Figure 6 , Figure 7 As shown, the pre-embedded section 33 of the tenon tongue 3, the pre-embedded part 4 of the tongue hole, and the pre-embedded part 6 of the wedge groove are integrally formed with several connecting ribs 41 to enhance the bonding strength between the pre-embedded part and the precast concrete component. The connecting ribs 41 extend outward perpendicular to the axial direction of the pre-embedded part, and their ends are bent to form hook-shaped feet. In order to facilitate the placement of the pre-embedded part, all the connecting ribs 41 are distributed in the same plane and are symmetrically distributed in two rows on both sides of the central axis of the pre-embedded part.
[0038] As a further technical solution in this embodiment, after all connections and assembly are completed, the node structure is externally supported by a template, and fine stone concrete is vacuum-cast on-site using a vacuum device to form a concrete protective layer covering the outside of the node structure. During the casting process of the protective layer, the gaps in the node structure are filled, and a protective layer is formed on the outside of the node structure to isolate the influence of the external environment on the embedded parts, improve the service life of the node structure, and enhance its aesthetics.
[0039] Example 2: Precast column components are generally assembled by axial insertion, while precast beam components are generally assembled by lap joints perpendicular to the axial direction. Furthermore, precast column components are mainly subjected to axial pressure, while precast beam components are mainly subjected to vertical axial shear force and bending moment. Therefore, their main stress planes and stress directions are different. Thus, for the rapid and stable assembly of precast concrete beam components, this example provides a node structure for precast assembled concrete beam-column components. The main structure of this node structure is basically the same as that in Example 1, and this part will not be described again. This example only describes the differences between the two.
[0040] like Figures 2-3 and Figure 5 As shown, the assembly plane of the tenon 12 should be perpendicular to the shear force direction. The tongue is a groove 16, which has an end hole located on the side end face of the lap joint 13. The groove is located on the main body of the precast component and faces the lap direction of the tenon 12. Figure 2 The tongue groove 16 and tenon 12 shown are lapped together perpendicular to the assembly plane. Figure 2 The tongue groove 16 shown is parallel to the assembly plane, suitable for tenon 12 to be lapped along the assembly plane. When tenon 12 laps 13, the tenon tongue 3 is placed through the groove. Correspondingly, the tongue eye embedded part is a tongue groove embedded part 5 with a U-shaped cross-section, such as... Figure 5 As shown, two rows of connecting ribs 41 are also provided on the two outer sides.
[0041] As a further technical solution of this embodiment, a first limiting hole 11 is provided on the tongue of the prefabricated component 1 through vertically, and a second limiting hole 31 is provided on the tenon 3 of the prefabricated component 2 through vertically in the axial direction. The first limiting hole 11 and the second limiting hole 31 are positioned correspondingly. After the assembly is completed, the first limiting hole 11 and the second limiting hole 31 are connected and fixed by pins to limit the relative movement of the prefabricated components along the assembly overlap direction.
[0042] The directional terms "up," "down," "side," "end," "longitudinal," "inner," and "outer" mentioned in this article are used to describe... Figures 1-7 The directions and orientations shown in the corresponding figures are described. These terms are primarily for the purpose of better describing the present invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation;
[0043] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.
[0044] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A node structure of a precast fabricated concrete beam-column member for connection between adjacent end portions of precast members, characterised in that: The node structure comprises a tenon, a mortise, a wedge slot, a tongue and a tongue eye at the connecting end of the prefabricated component; The tenon and the mortise are divided along the longitudinal symmetry center plane of the prefabricated component, and the tenon and the mortise are in size adaptation, and the tenon and the mortise of two adjacent prefabricated components are in lapping fit to form the main structure of the node structure; One end of the tongue is embedded in the tenon, and the other end extends outward from the end face of the tenon, and the tongue eye is arranged on the side end face of the mortise, and the tongue and the tongue eye cooperate to form the first limiting structure of the node structure; The wedge slot is located on the fitting plane of the tenon and penetrates the tenon in the transverse direction, and the wedge slots of two prefabricated components are in opposite engagement to form a wedge hole, and a wedge is arranged in the wedge hole to form the second limiting structure of the node structure; The tongue eye is formed by a tongue eye embedded part embedded in the prefabricated component, and the wedge slot is formed by a wedge slot embedded part embedded in the tenon; the tongue, the tongue eye embedded part and the wedge slot embedded part are metal parts.
2. The node structure of the precast fabricated concrete beam-column member according to claim 1, characterized in that: The node structure further comprises a hoop, and the hoop is tightly arranged outside the main structure.
3. The node structure of the precast fabricated concrete beam-column member according to claim 1, characterized in that: A plurality of connecting holes are arranged vertically through the tenon and are symmetrically distributed on both sides of the wedge slot, and the corresponding connecting holes at the adjacent ends of the prefabricated components are connected by a bolt assembly, and the connecting hole is formed by a connecting hole embedded part embedded in the tenon.
4. The node structure of the precast fabricated concrete beam-column member according to claim 3, characterized in that: The tongue eye is a tongue groove, which has an end hole on the side end face of the mortise, and the groove opening faces the lapping direction of the tenon, and the cross section of the tongue eye embedded part is in U-shaped structure.
5. The node structure of the precast fabricated concrete beam-column member according to claim 3, characterized in that: The tongue eye is a tongue hole, and the hole opening is located on the side end face of the mortise, and the tongue eye embedded part is in cylindrical shape.
6. The node structure of the precast fabricated concrete beam-column member according to claim 3, characterized in that: The outer circumferential surface of the embedded section of the tongue, the tongue eye embedded part, the wedge slot embedded part and the connecting hole embedded part is integrally formed with a plurality of connecting lugs, the connecting lugs extend outward perpendicular to the axial direction, and the distal ends are bent to form hook-shaped feet, all the connecting lugs are distributed in the same plane and are symmetrically distributed on both sides of the central axis plane in two rows.
7. The node structure of the precast fabricated concrete beam-column member as claimed in claim 4, wherein: A first limiting hole is arranged vertically through the tongue eye on the prefabricated component, and a second limiting hole is vertically arranged through the tongue, and the first limiting hole and the second limiting hole are fixedly connected by a pin.
8. The node structure of a precast fabricated concrete beam-column member according to any one of claims 1 to 6, characterized in that: The node structure further comprises a protective layer which is cast and wrapped outside.