Quickly spliced and assembled concrete precast beam body assembly

Abstract

The utility model relates to the technical field of concrete prefabricated part, especially is concrete prefabricated beam body subassembly of quick splicing assembly, including N horizontal settings and mutual connection's prefabricated beam body unit, the butt joint end surface between two adjacent prefabricated beam body units is fixedly connected through bolt connecting piece, still be provided with anti -drop fastening unit between two prefabricated beam body units, and the left and right ends of anti -drop fastening unit respectively reach the inside of prefabricated beam body unit of its corresponding side and are fixedly arranged, still be provided with a pair of reinforcing member below the butt joint end surface of two adjacent prefabricated beam body units, and both ends of reinforcing member are connected on the outside wall of prefabricated beam body unit. The utility model adopts N prefabricated beam body unit modularization split design, converts large span beam body into scattered prefabricated part, adapts small -size hoisting equipment, reduces transportation equipment requirement and site limit, and gradually splices through pre -butting -fixing -correcting -reinforcing process on site, shortens construction period.

Description

Technical Field

[0001] This utility model relates to the field of precast concrete technology, and in particular to precast concrete beam components that can be rapidly assembled. Background Technology

[0002] Large-span precast concrete beams are widely used in bridge, municipal and other engineering construction. Although their prefabrication characteristics can improve on-site construction efficiency, existing technical solutions still have many problems with insufficient adaptability.

[0003] For example, patent document with patent application number CN202123439714.7 discloses a precast beam whose main structure adopts integrated precast molding, including a precast beam shell and a steel reinforcement skeleton. The precast beam shell consists of a bottom surface, a first elevation and a second elevation. The first elevation and the second elevation are perpendicular to each other on both sides of the length direction of the bottom surface and have different heights. Multiple steel reinforcement trusses are interconnected to enhance structural stability.

[0004] For example, patent document with patent application number CN202123439714.7 discloses a precast beam whose main structure adopts integrated precast molding, including a precast beam shell and a steel reinforcement skeleton. The precast beam shell includes a bottom surface, a first elevation and a second elevation. The first elevation and the second elevation are perpendicular to each other on both sides of the length direction of the bottom surface, and the height of the first elevation is greater than the height of the second elevation. Multiple steel reinforcement trusses are interconnected.

[0005] As can be seen from the above description, it has the following drawbacks when used: First, the beam is prefabricated as a whole. When applied to large-span installation, the beam size must be extended accordingly to meet the span requirements. The cross-sectional dimensions and length of such large-span prefabricated components often exceed the transportation limits of conventional highways and railways. During transportation, not only customized ultra-large transportation equipment is required, but also special surveys and modifications to the transportation route are needed to avoid obstacles such as low bridges and narrow tunnels, which leads to a significant increase in transportation costs. At the same time, the bumps and vibrations during long-distance transportation can easily cause damage to the surface of the beam or damage to the internal structure, affecting the quality of the components.

[0006] Secondly, in the hoisting and installation phase, the overall weight of large-span integrated prefabricated components can typically reach tens or even hundreds of tons. This places high demands on the tonnage, lifting height, and operating radius of hoisting equipment, requiring the use of specialized equipment such as large crawler cranes or truck cranes. Not only are the equipment rental costs high, but there are also strict limitations on the site's load-bearing capacity and operating space. In densely populated urban areas, mountainous regions, and other conditions with limited space, it is difficult for large hoisting equipment to enter the site, making it impossible to carry out the installation work smoothly. Furthermore, the balance control of components during hoisting is difficult, posing safety risks such as collisions and overturning.

[0007] Based on this, it is necessary to design a modular, rapidly assembled precast concrete beam component to solve problems such as poor transportation convenience, high hoisting difficulty, and insufficient adaptability, thereby improving the efficiency and economy of engineering construction. Utility Model Content

[0008] To solve one of the aforementioned technical problems, the present invention employs the following technical solution: a precast concrete beam assembly for rapid assembly, comprising N horizontally arranged and interconnected precast beam units. The mating end faces of two adjacent precast beam units are fixedly connected by bolts. An anti-detachment fastening unit is also provided between two precast beam units. The left and right ends of the anti-detachment fastening unit extend into the interior of the corresponding precast beam unit and are fixedly installed. A reinforcement component is also provided below the mating end faces of two adjacent precast beam units, with both ends of the reinforcement component connected to the outer wall of the precast beam unit.

[0009] Based on any of the above technical solutions, a further optimization is made as follows: the precast beam unit includes a precast box-shaped steel beam, and a precast concrete beam is fixedly filled inside the cavity of the precast box-shaped steel beam. The left and right ends of the precast concrete beam are respectively flush with the two ends of the precast box-shaped steel beam. Fixed flanges are integrally welded to the two ends of the precast box-shaped steel beam. The fixed flanges are used to fix the anti-detachment fastening unit at the corresponding position and the fixed flange of the adjacent precast beam unit.

[0010] Based on any of the above technical solutions, a further optimization is made by forming the precast concrete beam by a steel reinforcement frame erected inside the cavity of the precast box-shaped steel beam and the concrete after pouring and solidification.

[0011] Based on any of the above technical solutions, a further optimization is made as follows: the anti-detachment fastening unit includes a connecting disc vertically disposed between the mating end faces of two adjacent precast beam units. The left and right ends of the connecting disc respectively abut against the end faces of the corresponding two fixed flanges and are fixedly connected to the fixed flanges on both sides by various bolt connectors. Anti-detachment inserts are symmetrically fixedly welded to the center of both sides of the connecting disc, and the ends of each anti-detachment insert extend into the mounting hole cavity of the precast concrete beam on its corresponding side.

[0012] Based on any of the above technical solutions, a further optimization is made: the anti-detachment plug includes a horizontally arranged plug-in steel shaft, one end of which is fixed to the center of the connecting disc, and the other end of which is interference-fitted into the corresponding mounting hole.

[0013] Based on any of the above technical solutions, a further optimization is made as follows: several inclined alloy anti-detachment elastic teeth are uniformly welded at intervals along the axial direction on the upper and lower parts of the outer side wall of each of the inserted steel shafts. The free ends of each anti-detachment elastic tooth are all located away from the central axis of the inserted steel shaft. In the installed state, each anti-detachment elastic tooth is fitted into the corresponding anti-detachment groove in the mounting cavity. Each anti-detachment groove is used to cooperate with the anti-detachment elastic tooth at its corresponding position.

[0014] Based on any of the above technical solutions, a further optimization is made: when each of the anti-detachment elastic teeth moves passively within the mounting hole cavity along with the corresponding insertion steel axis, each of the anti-detachment elastic teeth enters the corresponding anti-detachment groove through the deformation of its free end.

[0015] Based on any of the above technical solutions, a further optimization is made as follows: the auxiliary reinforcement component includes two square sleeves that are pre-movably sleeved on the outer side walls of the precast box-shaped steel beams on corresponding sides. A bottom connecting seat is fixed at the bottom of each square sleeve. A double-ended stud is provided between the two bottom connecting seats. The two ends of the double-ended stud are respectively movably extended to the outer side of the bottom connecting seat on the corresponding side. The external threaded sections of the double-ended studs on both sides of each bottom connecting seat are respectively screwed with inherent anti-loosening nuts. The two anti-loosening nuts located at the same end cooperate to achieve the abutment of the current bottom connecting seat.

[0016] Based on any of the above technical solutions, a further optimization is made where N is an integer greater than or equal to 2.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model adopts a modular design of N precast beam units, which transforms large-span beams into scattered precast components, making them compatible with small lifting equipment, reducing transportation equipment requirements and site limitations. Furthermore, the on-site assembly is carried out through a process of pre-connection, fixing, correction, and reinforcement, which shortens the construction cycle.

[0018] 2. The anti-loosening fastening unit of this utility model has an interference fit between the plug-in steel shaft to strengthen the radial / axial constraint, and the secondary reinforcement part adjusts the clamping force through the double-ended stud to prevent the splice from loosening or falling off.

[0019] 3. The precast beam unit adopts precast box-type steel beams and precast concrete beams with internal cavities; it is a steel-concrete composite structure, in which the tensile strength of steel and the compressive strength of concrete work together to bear the load; the concrete beams have built-in steel reinforcement to improve crack resistance, and the box-type steel beams protect the internal structure, reduce damage during transportation and construction, and extend service life. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn to scale.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the structure of this utility model with anti-detachment fastening units installed at both ends.

[0023] Figure 3 for Figure 2 A schematic diagram of the internal cross-sectional structure.

[0024] Figure 4 This is a partial internal structure diagram of the present invention.

[0025] Figure 5 This is a schematic diagram of the anti-detachment fastening unit of this utility model.

[0026] Figure 6 for Figure 4 An enlarged structural diagram of part A.

[0027] In the diagram, 1. Precast beam unit; 2. Bolted connector; 3. Precast box-type steel beam; 4. Precast concrete beam; 5. Fixing flange; 6. Connecting disc; 7. Inserted steel shaft; 8. Mounting cavity; 9. Anti-detachment elastic toothed plate; 10. Anti-detachment groove; 11. Square sleeve; 12. Bottom connecting seat; 13. Double-ended stud; 14. Anti-detachment nut. Detailed Implementation

[0028] The embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of the present utility model, and are therefore merely examples and should not be construed as limiting the scope of protection of the present utility model. The specific structure of the present utility model is as follows: Figures 1-6 As shown in the image.

[0029] Example 1: A precast concrete beam assembly for rapid assembly includes N horizontally arranged and interconnected precast beam units. The mating ends of two adjacent precast beam units are fixed together by bolts. An anti-detachment fastening unit is also provided between two precast beam units. The left and right ends of the anti-detachment fastening unit extend into the interior of the corresponding precast beam unit and are fixedly installed. A reinforcement part is also provided below the mating ends of two adjacent precast beam units. The two ends of the reinforcement part are connected to the outer wall of the precast beam unit.

[0030] The precast concrete beam assembly of this invention adopts a modular design, disassembling the overall beam into N horizontal precast beam units, which are then spliced ​​and fixed through multiple connection structures.

[0031] First, the mating ends of adjacent precast beam units are fixed together with bolts to form a preliminary axial fixation. Second, the anti-detachment fastening unit extends into the corresponding precast beam unit at both ends and is fixed to form a radial and axial anti-detachment constraint to prevent separation at the joint due to force. Finally, the secondary reinforcement unit below the mating end is connected to the outer wall of the precast beam unit at both ends to form additional support constraint from below, balancing the bending moment at the joint and forming a multi-fixation structure.

[0032] The anti-detachment fastening unit can effectively limit the relative displacement of adjacent precast beam units and avoid the risk of detachment at the splice; the secondary reinforcement can distribute the force on the mating end face, reduce stress concentration at the splice, and extend the service life of the components.

[0033] This utility model relates to a rapid assembly precast concrete beam assembly where each precast beam unit is prefabricated at the factory. Dividing the large-span precast concrete beam assembly into easily assembled components facilitates subsequent transportation. Upon arrival at the construction site, the two ends requiring initial hoisting are fitted with corresponding square sleeves and bottom connecting seats, along with auxiliary reinforcement components. Small lifting equipment is then used to hoist the beam to its installation position and secure it. After one precast beam unit is installed, the second unit is hoisted, controlling the precasting process. The left end of the beam unit is connected to the right end of the precast beam unit already installed on its left. The anti-detachment connection is achieved by connecting the steel shaft of the anti-detachment plug to the installation cavity. After the connection is in place, the end is fixed with bolts. At the same time, the overall level of the current precast beam unit is corrected in real time using lifting equipment. Then, the bottom connecting seats on the two precast beam units that have been installed are tightened and fixed in place with double-ended studs and anti-detachment nuts, thus completing the fastening installation of the second precast beam unit. This process is repeated to complete the installation of the remaining precast beam units.

[0034] The modular design allows for easy transport and compatibility with small lifting equipment, eliminating the need for large lifting machinery. This reduces the requirements for lifting equipment on construction sites, lowers equipment rental costs, and improves adaptability to confined construction spaces. The sequential assembly method reduces safety risks during construction, and the small weight of each unit makes the lifting and adjustment process easier to control.

[0035] Based on any of the above technical solutions, a further optimization is made as follows: the precast beam unit includes a precast box-shaped steel beam, and a precast concrete beam is fixedly filled inside the cavity of the precast box-shaped steel beam. The left and right ends of the precast concrete beam are respectively flush with the two ends of the precast box-shaped steel beam. Fixed flanges are integrally welded to the two ends of the precast box-shaped steel beam. The fixed flanges are used to fix the anti-detachment fastening unit at the corresponding position and the fixed flange of the adjacent precast beam unit.

[0036] Using precast box-section steel beams as the external load-bearing frame, and filling their internal cavity with precast concrete beams to form a composite force-bearing system, the high tensile strength of steel and the high compressive strength of concrete work together to enhance the overall load-bearing performance of the unit. The precast concrete beams and precast box-section steel beams are flush at both ends to ensure the flatness of the mating end faces and provide a good fit foundation for the docking of adjacent units. The fixed flanges integrally welded at both ends of the precast box-section steel beams serve as connection interfaces. By fitting with the fixed flanges of adjacent units and connecting with the anti-detachment fastening unit, the connection force is evenly transmitted to the composite structure of the box-section steel beams and concrete beams, avoiding stress concentration at the connection.

[0037] Precast box-type steel beams serve as the external frame, protecting the internal precast concrete beams from damage during transportation and hoisting, and enhancing the components' resistance to breakage.

[0038] Based on any of the above technical solutions, a further optimization is made by forming the precast concrete beam by a steel reinforcement frame erected inside the cavity of the precast box-shaped steel beam and the concrete after pouring and solidification.

[0039] First, a steel reinforcement frame is erected inside the cavity of the precast box-shaped steel beam. The steel reinforcement frame is fixed to the inner wall of the precast box-shaped steel beam (such as by welding or binding) to form an integral frame. Then, concrete is poured into the inner cavity. During the solidification process, the concrete forms a firm bond with the steel reinforcement frame and the inner wall of the precast box-shaped steel beam. The steel reinforcement frame bears the shrinkage stress during the hardening process of the concrete and the tensile stress in the later stage of the load, while the concrete bears the compressive stress, forming a composite load-bearing structure to ensure the integrated load-bearing of the precast concrete beam and the precast box-shaped steel beam.

[0040] Based on any of the above technical solutions, a further optimization is made as follows: the anti-detachment fastening unit includes a connecting disc vertically disposed between the mating end faces of two adjacent precast beam units. The left and right ends of the connecting disc respectively abut against the end faces of the corresponding two fixed flanges and are fixedly connected to the fixed flanges on both sides by various bolt connectors. Anti-detachment inserts are symmetrically fixedly welded to the center of both sides of the connecting disc, and the ends of each anti-detachment insert extend into the mounting hole cavity of the precast concrete beam on its corresponding side.

[0041] The anti-detachment fastening unit uses a connecting disc as the core connecting carrier. It abuts against the fixed flanges of adjacent precast beam units at both ends, and uses bolts to fasten the connecting disc to the fixed flanges on both sides as a whole, forming an axial rigid connection. The anti-detachment inserts welded symmetrically on both sides of the connecting disc serve as radial restraint components. Their ends extend into the mounting holes of the corresponding precast concrete beams. The cooperation between the inserts and the mounting holes restricts the radial relative displacement of adjacent units. At the same time, the symmetrical design of the connecting disc ensures that the force on both sides is uniform, avoiding tilting at the splice due to force imbalance, thus achieving the dual restraint functions of axial fastening and radial anti-detachment.

[0042] Based on any of the above technical solutions, a further optimization is made: the anti-detachment plug includes a horizontally arranged plug-in steel shaft, one end of which is fixed to the center of the connecting disc, and the other end of which is interference-fitted into the corresponding mounting hole.

[0043] The anti-detachment insert uses a horizontally positioned plug-in steel shaft as the core anti-detachment component. One end of the shaft is fixed (welded) to the center of the connecting disc, ensuring a direct and stable force transmission path. The other end is inserted into the mounting hole of the precast concrete beam with an interference fit. The interference fit generates a preload between the plug-in steel shaft and the wall of the mounting hole, forming a tight connection. When adjacent precast beam units tend to have radial relative displacement, the friction between the plug-in steel shaft and the wall of the mounting hole, along with the constraint resistance of the interference fit, jointly hinders the displacement. At the same time, the horizontal positioning of the plug-in steel shaft ensures that it is parallel to the beam axis, allowing the anti-detachment force to be transmitted along the direction of force on the beam, thus improving the reliability of the anti-detachment mechanism.

[0044] Example 2: Compared with Example 1, this example also includes the following technical features: Based on any of the above technical solutions, a further optimization is made as follows: several inclined alloy anti-detachment elastic teeth are uniformly welded at intervals along the axial direction on the upper and lower parts of the outer side wall of each of the inserted steel shafts. The free ends of each anti-detachment elastic tooth are all located away from the central axis of the inserted steel shaft. In the installed state, each anti-detachment elastic tooth is fitted into the corresponding anti-detachment groove in the mounting cavity. Each anti-detachment groove is used to cooperate with the anti-detachment elastic tooth at its corresponding position.

[0045] Example 2 adds an anti-detachment elastic tooth structure to the insert steel shaft of Example 1. The anti-detachment elastic tooth is made of alloy material and is inclinedly welded to the upper and lower parts of the outer wall of the insert steel shaft. The free end is far away from the axis and is in an outward expansion state. During insertion, the free end of the tooth is squeezed by the wall of the mounting hole and undergoes elastic deformation, shrinking along the insertion direction, so that the insert steel shaft can be inserted smoothly. When inserted to the anti-detachment groove position, the tooth elastically resets and the free end is stuck in the anti-detachment groove, forming a double clamping constraint in the axial and radial directions. Combined with the original interference fit, the connection between the insert steel shaft and the mounting hole cavity is upgraded from surface contact pre-tightening to a composite fixation of surface contact and clamping, further restricting the relative displacement between the two.

[0046] Based on any of the above technical solutions, a further optimization is made: when each of the anti-detachment elastic teeth moves passively within the mounting hole cavity along with the corresponding insertion steel axis, each of the anti-detachment elastic teeth enters the corresponding anti-detachment groove through the deformation of its free end.

[0047] When the insertable steel shaft moves into the mounting hole under the push of an external force (such as the hoisting and docking force), the free end of the anti-detachment elastic toothed plate first contacts the entrance of the mounting hole. As the insertable steel shaft continues to move, the cavity wall exerts a continuous squeezing force on the free end of the toothed plate. The toothed plate undergoes elastic bending deformation around the welding point, and the free end contracts towards the axis of the insertable steel shaft, so that the toothed plate fits the outer wall of the steel shaft as a whole, ensuring a smooth insertion process. When the toothed plate moves to the preset anti-detachment groove position in the mounting hole, the squeezing force of the cavity wall on the toothed plate disappears, and the toothed plate resets under the action of its own elastic restoring force. The free end springs into the anti-detachment groove, forming a stable snap-fit ​​and completing the anti-detachment fixation.

[0048] Based on any of the above technical solutions, a further optimization is made as follows: the auxiliary reinforcement component includes two square sleeves that are pre-movably sleeved on the outer side walls of the precast box-shaped steel beams on corresponding sides. A bottom connecting seat is fixed at the bottom of each square sleeve. A double-ended stud is provided between the two bottom connecting seats. The two ends of the double-ended stud are respectively movably extended to the outer side of the bottom connecting seat on the corresponding side. The external threaded sections of the double-ended studs on both sides of each bottom connecting seat are respectively screwed with inherent anti-loosening nuts. The two anti-loosening nuts located at the same end cooperate to achieve the abutment of the current bottom connecting seat.

[0049] The square sleeve is pre-movably fitted onto the outer wall of the precast box-shaped steel beam, and its position can be adjusted along the beam's axial direction to accommodate different splicing gaps. The bottom connecting seat fixed at the bottom of the square sleeve serves as a load-bearing carrier. It connects the two connecting seats on both sides through double-ended studs. After the two ends of the double-ended studs protrude from the connecting seats, anti-loosening nuts are screwed on both sides of the connecting seats. By tightening the nuts on both sides, the double-ended studs generate axial tension, which drives the two bottom connecting seats on both sides to move closer to each other. This, in turn, generates radial clamping force on the precast box-shaped steel beam through the square sleeve. At the same time, the double-ended studs themselves bear the bending moment at the beam joint, forming bottom support reinforcement, and working together with the upper connecting structure to balance the force.

[0050] Based on any of the above technical solutions, a further optimization is made where N is an integer greater than or equal to 2.

[0051] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. For those skilled in the art, any alternative improvements or transformations made to the implementation of this utility model fall within the protection scope of this utility model.

[0052] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A precast concrete beam assembly for rapid assembly, characterized in that: The system comprises N horizontally arranged and interconnected precast beam units. The mating end faces of two adjacent precast beam units are fixed together by bolts. An anti-detachment fastening unit is also provided between two precast beam units. The left and right ends of the anti-detachment fastening unit extend into the interior of the precast beam unit on the corresponding side and are fixedly installed. A reinforcement part is also provided below the mating end faces of two adjacent precast beam units. The two ends of the reinforcement part are connected to the outer wall of the precast beam unit.

2. The precast concrete beam assembly for rapid assembly according to claim 1, characterized in that: The precast beam unit includes a precast box-shaped steel beam, and a precast concrete beam is fixedly filled inside the cavity of the precast box-shaped steel beam. The left and right ends of the precast concrete beam are flush with the two ends of the precast box-shaped steel beam, and a fixing flange is integrally welded to each end of the precast box-shaped steel beam. The fixing flange is used to fix the anti-detachment fastening unit at its corresponding position and the fixing flange of the adjacent precast beam unit.

3. The precast concrete beam assembly for rapid assembly according to claim 2, characterized in that: The precast concrete beam is formed by a steel frame erected inside the cavity of the precast box-shaped steel beam and the concrete being poured and solidified.

4. The precast concrete beam assembly for rapid assembly according to claim 3, characterized in that: The anti-detachment fastening unit includes a connecting disc vertically disposed between the mating end faces of two adjacent precast beam units. The left and right ends of the connecting disc abut against the end faces of the corresponding two fixed flanges and are fixed to the fixed flanges on both sides by various bolt connectors. Anti-detachment inserts are symmetrically fixed and welded to the center of both sides of the connecting disc, and the ends of each anti-detachment insert extend into the mounting hole cavity of the precast concrete beam on its corresponding side.

5. The precast concrete beam assembly for rapid assembly according to claim 4, characterized in that: The anti-detachment plug includes a horizontally arranged plug-in steel shaft, one end of which is fixed to the center of the connecting disc, and the other end of which is interference-fitted into the corresponding mounting hole.

6. The precast concrete beam assembly for rapid assembly according to claim 5, characterized in that: Several inclined alloy anti-detachment elastic teeth are evenly welded at intervals along the axial direction on the upper and lower parts of the outer side wall of each of the plug-in steel shafts. The free ends of each anti-detachment elastic tooth are located away from the central axis of the plug-in steel shaft. In the installed state, each anti-detachment elastic tooth is fitted into the corresponding anti-detachment groove in the mounting cavity. Each anti-detachment groove is used to cooperate with the anti-detachment elastic tooth at its corresponding position.

7. The precast concrete beam assembly for rapid assembly according to claim 6, characterized in that: When each of the anti-detachment elastic teeth moves passively into the mounting hole cavity along with the corresponding insertion steel axis, each of the anti-detachment elastic teeth enters the corresponding anti-detachment groove through the deformation of its free end.

8. The precast concrete beam assembly for rapid assembly according to claim 7, characterized in that: The auxiliary reinforcement includes two square sleeves that are pre-movably fitted onto the outer side walls of the precast box-shaped steel beams on corresponding sides. A bottom connecting seat is fixed at the bottom of each square sleeve. A double-ended stud is provided between the two bottom connecting seats. The two ends of the double-ended stud movably extend to the outside of the corresponding bottom connecting seat. The external threaded sections of the double-ended stud on both sides of each bottom connecting seat are screwed with inherent anti-loosening nuts. The two anti-loosening nuts located at the same end cooperate to abut against the current bottom connecting seat.

9. The precast concrete beam assembly for rapid assembly according to claim 8, characterized in that: in, N is an integer greater than or equal to 2.

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