Box column and precast beam joint structure

Abstract

The utility model discloses a box type column and precast beam joint structure in the field of building structures, which comprises a box type column and a plurality of precast beams, an upper connecting plate and a lower supporting plate are arranged on the outer side of the box type column, the upper connecting plate and the lower supporting plate are arranged at intervals, and a plurality of steel plates are arranged between the upper connecting plate and the lower supporting plate. A mounting position is defined by every two adjacent steel plates and the lower supporting plate, and one end of each precast beam is arranged on the corresponding mounting position; a plurality of reserved hole grooves are formed in the lower supporting plate, embedded steel plates are arranged on the prefabricated beams, clamping protrusions are arranged on the embedded steel plates, and the clamping protrusions are welded to the side walls of the reserved hole grooves. The utility model solves the problems that the connection quality is ensured, the construction period is prolonged and the overall construction progress is influenced by depending on an accurate measurement means in the construction process of the existing box column and the precast concrete beam, realizes the accurate positioning of the precast beam on the box column, does not need an additional measurement tool in the construction process, improves the installation efficiency, and reduces the construction cost. And the engineering progress can be accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of building structures, and specifically, to a node structure between a box column and a precast beam. Background Art

[0002] In building structures, the core area of the node, as well as the column ends and beam ends, are the weakest parts of the frame. They are subjected to complex forces, bearing the bending moments and shear forces transmitted from the beams and columns, and play a role in transmitting and distributing internal forces and maintaining the integrity of the frame structure.

[0003] For the construction of prefabricated buildings, especially the joining of two heterogeneous material components, namely steel columns and precast concrete beams, it poses a major challenge in design and construction. When connecting the existing box columns and precast concrete beams, precise measurement means are relied on during the construction process to ensure the connection quality. This process not only increases the complexity and difficulty of construction, but also requires operators to invest more time and effort to ensure that the installation accuracy meets the standards. Due to the increase in the measurement and verification links, the entire construction period is inevitably lengthened, which not only increases the construction cost, but may also have an adverse impact on the overall construction progress of the project, thus affecting the on-time delivery and subsequent use of the project.

[0004] The above defects need to be solved urgently. Summary of the Utility Model

[0005] In order to solve the problem that in the construction process of the existing box column and precast concrete beam, precise measurement means are relied on to ensure the connection quality, the construction period is prolonged, and the overall construction progress is affected, the utility model provides a node structure between a box column and a precast beam.

[0006] The technical solution of the utility model is described as follows:

[0007] A node structure between a box column and a precast beam includes a box column and a plurality of precast beams. An upper connecting plate and a lower supporting plate are arranged on the outer side of the box column. The upper connecting plate and the lower supporting plate are arranged at intervals. A plurality of steel plates are arranged between the upper connecting plate and the lower supporting plate. An installation position is formed by enclosing between two adjacent steel plates and the lower supporting plate. One ends of the plurality of precast beams are arranged at the corresponding installation positions;

[0008] The lower supporting plate is provided with a plurality of reserved hole grooves. An embedded steel plate is arranged on the precast beam. A clamping protrusion is arranged on the embedded steel plate. The clamping protrusion is welded to the side wall of the reserved hole groove.

[0009] According to the utility model of the above scheme, the steel plate includes a first side surface and a second side surface. The first side surface and the second side surface are perpendicularly arranged. The first side surface is connected to the box column, and the second side surface is connected to the lower supporting plate.

[0010] For the present utility model according to the above solution, the steel plate further includes a third side surface, the third side surface is arranged parallel to the second side surface, and the third side surface is arranged on a side of the first side surface away from the second side surface;

[0011] A bracket structure is arranged between two adjacent steel plates, and the two steel plates are located at two adjacent installation positions. The bracket structure includes an upper bracket part and a lower bracket part. Two sides of the upper bracket part are respectively connected to the third side surfaces of the two steel plates, and two sides of the lower bracket part are respectively connected to the second side surfaces of the two steel plates.

[0012] For the present utility model according to the above solution, the length of the third side surface is less than the length of the second side surface.

[0013] For the present utility model according to the above solution, the length of the first side surface is 150 mm to 200 mm, and the length of the second side surface is 270 mm to 320 mm.

[0014] For the present utility model according to the above solution, a plurality of steel bars are arranged on the top of the precast beam. A plurality of first connection holes distributed up and down are arranged on the upper connection plate. A plurality of second connection holes corresponding to the first connection holes one by one are arranged on the box column. One ends of the plurality of steel bars pass through the corresponding first connection holes and are matched with the second connection holes.

[0015] For the present utility model according to the above solution, the plurality of steel bars are divided into an upper steel bar group and a lower steel bar group located below the upper steel bar group. The first connection holes are divided into first upper through holes and first lower through holes located below the first upper through holes. The second connection holes are divided into second upper through holes and second lower through holes located below the second upper through holes;

[0016] A pouring groove is arranged on the top of the precast beam. The upper steel bar group is located above the pouring groove. One end of the upper steel bar group passes through the corresponding first upper through hole and is matched with the corresponding second upper through hole. One end of the lower steel bar group passes through the corresponding second upper through hole and is matched with the corresponding second lower through hole.

[0017] For the present utility model according to the above solution, the first connection holes and the second connection holes are both arranged in a matrix.

[0018] For the present utility model according to the above solution, there is a gap between the end of the precast beam and the box column.

[0019] For the present utility model according to the above solution, the end of the precast beam is recessed inward to form a groove.

[0020] For the present utility model according to the above solution, its beneficial effects are as follows:

[0021] In the above node structure of the box-shaped column and the precast beam, a number of reserved holes and grooves are provided on the lower supporting plate, an embedded steel plate is provided on the precast beam, and a clamping protrusion is provided on the embedded steel plate. The clamping protrusion is welded to the side wall of the reserved hole and groove, that is, the reserved hole and groove provided on the lower supporting plate match the clamping protrusion of the embedded steel plate on the precast beam, realizing the precise positioning of the precast beam on the box-shaped column. During the construction process, no additional measuring tools are required, reducing the cumbersome measuring and checking steps in the traditional connection method, improving the installation efficiency, and helping to speed up the project progress. In addition, an installation position is formed by enclosing between two adjacent steel plates, the upper connecting plate and the lower supporting plate. The precast beam can be quickly and accurately positioned on the corresponding installation position, ensuring the position accuracy of the precast beam during the installation process, reducing the on-site adjustment time. After the precast structure is in place, there is no need to wait, and the subsequent processes can be constructed, improving the overall on-site construction progress and shortening the construction period. Description of the Drawings

[0022] Figure 1 It is a top view of Embodiment 1;

[0023] Figure 2 It is a bottom view of Embodiment 1;

[0024] Figure 3 It is one of the partial structure diagrams of Embodiment 1;

[0025] Figure 4 It is the second of the partial structure diagrams of Embodiment 1;

[0026] Figure 5 It is the third of the partial structure diagrams of Embodiment 1;

[0027] Figure 6 It is an installation diagram of the precast beam and the box-shaped column;

[0028] Figure 7 It is one of the partial structure diagrams of Embodiment 2;

[0029] Figure 8 It is a structure diagram of the upper connecting plate of Embodiment 2;

[0030] Figure 9 It is the second of the partial structure diagrams of Embodiment 2.

[0031] In the figure, 1 is a box column; 11 is a second connection hole; 12 is a strengthening part; 13 is a third connection hole; 2 is a precast beam; 21 is a clamping projection; 22 is a casting groove; 23 is a groove; 3 is an upper connecting plate; 31 is a first connection hole; 32 is a partition plate; 321 is an upper partition plate; 322 is a lower partition plate; 33 is a partition position; 331 is an upper partition position; 332 is a lower partition position; 4 is a lower supporting plate; 41 is a reserved hole groove; 5 is a steel plate; 51 is a first side; 52 is a second side; 53 is a third side; 54 is a fourth side; 55 is a fifth side; 56 is a sixth side; 6 is an installation position; 7 is a bracket structure; 71 is an upper bracket part; 72 is a lower bracket part; 8 is a steel bar; 9 is a gap. Detailed implementation mode

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0033] Embodiment 1

[0034] As Figure 1 、 Figure 2 shown, the present utility model provides a node structure of a box column and a precast beam, including a box column 1 and a plurality of precast beams 2. An upper connecting plate 3 and a lower supporting plate 4 are arranged on the outer side of the box column 1. The upper connecting plate 3 and the lower supporting plate 4 are arranged at intervals. A plurality of steel plates 5 are arranged between the upper connecting plate 3 and the lower supporting plate 4. An installation position 6 is formed by enclosing between two adjacent steel plates 5 and the lower supporting plate 4. One end of a plurality of precast beams 2 is arranged on the corresponding installation position 6, ensuring the position accuracy of the precast beam 2 during the installation process, reducing the on-site adjustment time, and greatly reducing the time and labor costs required for on-site adjustment due to position deviation. At the same time, after the precast structure is in place, there is no need to wait, and subsequent processes can be constructed, improving the overall on-site construction progress and shortening the construction period. In addition, two steel plates 5 are arranged on the side of the box column 1, so that an installation position 6 is formed by enclosing between the two steel plates 5 and the lower supporting plate 4. One installation position 6 corresponds to installing one precast beam 2.

[0035] As Figure 3 shown, during installation, the box column 1 is installed vertically upward, and the precast beam 2 is installed horizontally. When precast beams 2 need to be installed on all four sides of the box column 1, the included angle between two adjacent precast beams 2 is 90°, so as to realize the stable connection between the box column 1 and the precast beam 2. Of course, when precast beams 2 need to be installed on two sides of the box column 1, the included angle between the two precast beams 2 is 90° or 180°. In actual design, the number of precast beams 2 and the included angle between the precast beams 2 can be designed according to actual needs.

[0036] In this embodiment, the upper connecting plate 3 and the lower supporting plate 4 are integrally formed with the box column 1, improving the assembly stability of the upper connecting plate 3 and the lower supporting plate 4 with the box column 1. In addition, each side of the box column 1 corresponds to an upper connecting plate 3, and the width of the upper connecting plate 3 is smaller than the width of the corresponding side of the box column 1. Additionally, the precast beam 2 is a precast concrete beam, that is, the main structures of the present utility model all adopt precast components. The construction of the joints between the box column 1 and the precast beam 2 on-site is simple, and the installation is faster than that of the traditional cast-in-place structure.

[0037] As Figure 4 shown, in this embodiment, the steel plate 5 includes a first side 51 and a second side 52, the first side 51 and the second side 52 are perpendicularly arranged, the first side 51 is connected to the box column 1, and the second side 52 is connected to the lower supporting plate 4. The steel plate 5 further includes a third side 53, the third side 53 is parallel to the second side 52, and the third side 53 is arranged on the side of the first side 51 away from the second side 52, such that the installation position 6 is integrally arranged in a "pocket shape", facilitating the rapid placement of the precast beam 2 on the installation position 6. In addition, a bracket structure 7 is arranged between two adjacent steel plates 5, and the two steel plates 5 are located on two adjacent installation positions 6. The bracket structure 7 includes an upper bracket part 71 and a lower bracket part 72. The two sides of the upper bracket part 71 are respectively connected to the third sides 53 of the two steel plates 5, the two sides of the lower bracket part 72 are respectively connected to the second sides 52 of the two steel plates 5. Both the upper bracket part 71 and the lower bracket part 72 form a triangular stable structure with the two steel plates 5, providing effective support for the lapping of the precast beam 2 and bearing the shear force at the beam end of the precast beam 2. In addition, the setting of the bracket structure 7 enables the present utility model to meet the installation requirements without supports and without large-scale mechanical equipment except for hoisting, simplifies the on-site procedures, reduces the construction measure cost, and thus achieves the purpose of cost reduction and efficiency improvement. Additionally, reinforcing parts 12 are arranged at the four inner corners of the box column 1, and the reinforcing parts 12 are arranged between the upper bracket part 71 and the lower bracket part 72, thereby strengthening the structural strength of the box column 1.

[0038] As Figure 4 shown, in this embodiment, the length of the third side 53 of the steel plate 5 is smaller than the length of the second side 52 of the steel plate 5, such that the steel plate 5 is in the shape of a right trapezoid, enabling the steel plate 5 to more flexibly adapt to the installation requirements while maintaining the structural strength. Since the third side 53 is relatively short, a more compact and stable connection structure can be formed when the upper bracket part 71 connects two adjacent steel plates 5. In addition, the right trapezoid-shaped steel plate 5 enables the precast beam 2 to be placed more smoothly in the installation position 6, reducing the resistance and adjustment time during the installation process, improving the construction efficiency. At the same time, it also helps the precast beam 2 to maintain the correct position and angle after installation, reducing the workload of subsequent adjustment.

[0039] In this embodiment, the length of the first side surface 51 is 150 mm to 200 mm, and the length of the second side surface 52 is 270 mm to 320 mm. The length of the first side surface 51 can be designed to be 180 mm, and the length of the second side surface 52 can be designed to be 300 mm. Of course, in actual design, the lengths of the first side surface 51 and the second side surface 52 can be designed according to actual needs.

[0040] As Figure 2 , Figure 5 , Figure 6 shown, in this embodiment, the lower supporting plate 4 is provided with a plurality of reserved hole grooves 41, the precast beam 2 is provided with a buried steel plate 5, and the buried steel plate 5 is provided with a clamping protrusion 21. The clamping protrusion 21 is welded to the side wall of the reserved hole groove 41. During installation, the clamping protrusion 21 is fixed to the side wall of the reserved hole groove 41 by groove welding. That is, after hoisting and positioning, the buried steel plate 5 is welded to the supporting plate to ensure the installation accuracy and the safety of the precast beam 2 before the concrete is poured. That is, the reserved hole grooves 41 provided on the lower supporting plate 4 match the clamping protrusions 21 of the buried steel plate 5 on the precast beam 2, realizing the precise positioning of the precast beam 2 on the box-shaped column 1. During installation, only the clamping protrusion 21 needs to be aligned with the reserved hole groove 41 and inserted, and then welded and fixed to ensure the connection accuracy and stability between the precast beam 2 and the box-shaped column 1. No additional measuring tools are required during the construction process, reducing the cumbersome measuring and checking steps in the traditional connection method, improving the installation efficiency, and helping to speed up the project progress. In addition, the reserved hole grooves 41 can be designed to be multiple, and the corresponding clamping protrusions 21 of the buried steel plate 5 are also designed to be multiple to improve the assembly stability between the lower supporting plate 4 and the precast beam 2.

[0041] In this embodiment, a plurality of steel bars 8 are arranged on the top of the precast beam 2, a plurality of first connection holes 31 are arranged on the upper connecting plate 3 in an up-and-down distribution, and a plurality of second connection holes 11 corresponding to the first connection holes 31 one by one are arranged on the box-shaped column 1. One end of the plurality of steel bars 8 passes through the corresponding first connection holes 31 and cooperates with the second connection holes 11, so that the precast beam 2 and the box-shaped column 1 are effectively connected.

[0042] In this embodiment, multiple steel bars 8 are divided into an upper steel bar group and a lower steel bar group located below the upper steel bar group. The first connection hole 31 is divided into a first upper through hole and a first lower through hole located below the first upper through hole. The second connection hole 11 is divided into a second upper through hole and a second lower through hole located below the second upper through hole. A pouring groove 22 is provided at the top of the precast beam 2. The upper steel bar group is located above the pouring groove 22. One end of the upper steel bar group passes through the corresponding first upper through hole and cooperates with the corresponding second upper through hole. One end of the lower steel bar group passes through the corresponding second upper through hole and cooperates with the corresponding second lower through hole. In addition, the first connection holes 31 and the second connection holes 11 are arranged in a matrix, ensuring that when the precast beam 2 bears various external forces, the force can be evenly distributed, avoiding the occurrence of stress concentration phenomena, thereby extending the service life and safety of the structure.

[0043] When the node structures of two box columns 1 are connected left and right with the precast beam 2, one end of the upper steel bar group passes through the second upper through hole of one of the box columns 1 and the first upper through hole of the corresponding upper connecting plate 3, and the other end of the upper steel bar group passes through the second upper through hole of the other box column 1 and the first upper through hole of the corresponding upper connecting plate 3. One end of the lower steel bar group passes through the second lower through hole of one of the box columns 1 and the first lower through hole of the corresponding upper connecting plate 3, and the other end of the lower steel bar group passes through the second lower through hole of the box column 1 and the first lower through hole of the corresponding upper connecting plate 3. During construction, concrete is poured into the pouring groove 22, increasing the contact area between the precast beam 2 and the concrete, and further enhancing the integrity of the structure. At the same time, the concrete is poured starting from the upper surface of the lower support plate 4, so that the pouring height of the concrete covers the entire upper connecting plate 3, thereby realizing the node connection between the box column 1 and the precast beam 2, improving the stability and durability of the overall structure, simplifying the construction process, and improving the construction efficiency.

[0044] As Figure 6 shown, in this embodiment, there is a gap 9 between the end of the precast beam 2 and the box column 1, providing sufficient reserved space between the precast beam 2 and the box column 1 to facilitate the positioning of the precast beam 2, thus completing the installation. During construction, the gap 9 between the end of the precast beam 2 and the box column 1 is filled with concrete, and through the curing effect of the concrete, the precast beam 2 and the box column 1 are connected together. In addition, the shortest distance between the end of the precast beam 2 and the box column 1 is 100 mm to 110 mm. Preferably, the shortest distance between the end of the precast beam 2 and the box column 1 is 105 mm. Of course, in actual design, the shortest distance between the end of the precast beam 2 and the box column 1 can be designed according to the situation. In addition, a groove 23 is formed by the inward depression of the end of the precast beam 2, increasing the contact area between the precast beam 2 and the concrete and improving the strength of the precast beam 2 and the box column 1. At the same time, the groove depth of the groove 23 can be designed to be 5 mm to 10 mm. Preferably, the groove depth of the groove 23 is 5 mm. Of course, in actual design, the groove depth of the groove 23 can be designed according to the situation.

[0045] When the utility model is installed, first, the box column 1 is installed on the ground, and then the precast beam 2 is hoisted and positioned, so that the clamping convex 21 of the embedded steel plate 5 of the precast beam 2 is groove-welded and fixed to the side wall of the reserved hole groove 41 of the box column 1. Then, the steel bars 8 are passed through the corresponding first connection holes 31 and second connection holes 11, and the steel bars 8 are tied with stirrups. Then, formwork is supported at the joint of the box column 1 and the precast beam 2 to facilitate the pouring of concrete on the upper connection plate 3 and the supporting plate, so that the beam surface and the joint concrete are poured. After the joints of the box column 1 and the precast beam 2 on one floor are installed, the joints of the box column 1 and the precast beam 2 on the next floor are installed. The construction of the utility model is convenient and does not require support. After the precast beam 2 is positioned, there is no need to wait, and the subsequent processes can be constructed in advance, improving the overall on-site construction progress and greatly shortening the construction period.

[0046] Embodiment 2

[0047] As Figures 7 to 9 shown, different from Embodiment 1, the steel plate 5 of this embodiment includes a fourth side surface 54, a fifth side surface 55 and a sixth side surface 56. The fourth side surface 54 and the sixth side surface 56 are arranged in parallel. The fifth side surface 55 is arranged between the fourth side surface 54 and the sixth side surface 56, and the fourth side surface 54 is perpendicular to the fifth side surface 55. The fourth side surface 54 is connected to the upper connection plate 3, the fifth side surface 55 is connected to the box column 1, and the sixth side surface 56 is connected to the lower supporting plate 4. The installation position 6 is integrally arranged in a "pocket shape", which is convenient for the precast beam 2 to be quickly placed on the installation position 6. In addition, a bracket structure 7 is arranged between two adjacent steel plates 5, and the two steel plates 5 are located on two adjacent installation positions 6. The two sides of the bracket structure 7 are respectively connected to the side surfaces of the two steel plates 5. The bracket structure 7 and the two steel plates 5 form a triangular stable structure, providing effective support for the lapping of the precast beam 2 and bearing the shear force at the beam end of the precast beam 2. At the same time, the two sides of the bracket structure 7 are respectively connected to the lower supporting plate 4, further strengthening the connection stability between the lower supporting plate 4 and the box pipe. In addition, the arrangement of the bracket structure 7 enables the utility model to meet the installation requirements without support and without large-scale mechanical equipment except for hoisting, simplifies the on-site processes, reduces the construction measure cost, and thus achieves the purpose of cost reduction and efficiency improvement.

[0048] As Figures 7 to 9 shown, in this embodiment, a plurality of steel bars 8 are arranged on the top of the precast beam 2. A plurality of partition plates 32 distributed up and down are arranged on the upper connection plate 3. The left and right adjacent two partition plates 32 and the upper connection plate 3 enclose a plurality of partition positions 33. A plurality of third connection holes 13 corresponding to the partition positions 33 one by one are arranged on the box column 1. One end of the plurality of steel bars 8 passes through the corresponding third connection holes 13, so that the precast beam 2 and the box column 1 are effectively connected.

[0049] As Figures 7 to 9As shown, in this embodiment, the plurality of steel bars 8 are divided into an upper steel bar group and a lower steel bar group located in the upper steel bar group, the third connection hole 13 is divided into a third upper through hole and a third lower through hole located below the third upper through hole, the partition 33 is divided into an upper partition 331 and a lower partition 332 located below the upper partition 331, the partition plate 32 is divided into an upper partition 321 and a lower partition 322 located below the upper partition 321, the upper partition 331 is formed between two adjacent upper partitions 321 and the upper connecting plate 3, the lower partition 332 is formed between two adjacent lower partitions 322 and the upper connecting plate 3, the third upper through hole is arranged on the corresponding upper partition 331, and the third lower through hole is arranged on the corresponding lower partition 332. At the same time, a casting trough 22 is arranged on the top of the precast beam 2, the upper steel bar group is located above the casting trough 22, one end of the upper steel bar group passes through the corresponding third upper through hole, the lower steel bar group is arranged in the casting trough 22, and one end of the lower steel bar group passes through the corresponding third lower through hole.

[0050] During construction, concrete is poured in the pouring trough 22, increasing the contact area between the precast beam 2 and the concrete, further enhancing the integrity of the structure. At the same time, concrete is poured from the upper surface of the lower support plate 4, so that the pouring height of the concrete covers the entire upper connecting plate 3, thereby realizing the node connection between the box column 1 and the precast beam 2, improving the stability and durability of the overall structure, simplifying the construction process, and improving construction efficiency. In addition, the setting of the partition plate 32 can increase the contact area between the box column 1 and the concrete and improve the overall structural strength.

[0051] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

[0052] The above is an exemplary description of the utility model patent in conjunction with the accompanying drawings. It is obvious that the implementation of the utility model patent is not limited to the above-mentioned method. As long as various improvements are made by adopting the method concept and technical solution of the utility model patent, or the concept and technical solution of the utility model patent are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A box-shaped column and precast beam joint structure, characterized in that, It includes a box-shaped column and several precast beams. Upper connecting plates and lower supporting plates are arranged on the outer side of the box-shaped column. The upper connecting plates and the lower supporting plates are arranged at intervals. Several steel plates are arranged between the upper connecting plates and the lower supporting plates. Installation positions are formed by enclosing between adjacent two of the steel plates and the lower supporting plates. One ends of several of the precast beams are arranged on the corresponding installation positions. Several reserved hole grooves are arranged on the lower supporting plate. Embedded steel plates are arranged on the precast beams. Clamping protrusions are arranged on the embedded steel plates. The clamping protrusions are welded to the side walls of the reserved hole grooves.

2. The box column and precast beam joint structure according to claim 1, wherein The steel plate includes a first side face and a second side face. The first side face and the second side face are perpendicular to each other. The first side face is connected to the box-shaped column. The second side face is connected to the lower supporting plate.

3. The box column and precast beam joint structure according to claim 2, characterized in that, The steel plate further includes a third side face. The third side face is parallel to the second side face. And the third side face is arranged on one side of the first side face away from the second side face. A bracket structure is arranged between adjacent two of the steel plates. And the two steel plates are located on adjacent two of the installation positions. The bracket structure includes an upper bracket part and a lower bracket part. Two sides of the upper bracket part are respectively connected to the third side faces of the two steel plates. Two sides of the lower bracket part are respectively connected to the second side faces of the two steel plates.

4. The box column and precast beam joint structure according to claim 3, characterized in that, The length of the third side face is less than the length of the second side face.

5. The box column and precast beam joint structure according to claim 4, characterized in that, The length of the first side face is 150 mm to 200 mm. The length of the second side face is 270 mm to 320 mm.

6. The box column and precast beam joint structure according to claim 1, characterized in that, A plurality of steel bars are arranged on the top of the precast beam. A plurality of first connection holes distributed vertically are arranged on the upper connecting plate. A plurality of second connection holes corresponding to the first connection holes one by one are arranged on the box-shaped column. One ends of the plurality of steel bars pass through the corresponding first connection holes to cooperate with the second connection holes.

7. The box column and precast beam joint structure according to claim 6, characterized in that, The plurality of steel bars are divided into an upper steel bar group and a lower steel bar group located below the upper steel bar group. The first connection holes are divided into first upper through holes and first lower through holes located below the first upper through holes. The second connection holes are divided into second upper through holes and second lower through holes located below the second upper through holes. A casting groove is arranged on the top of the precast beam. The upper steel bar group is located above the casting groove. One ends of the upper steel bar group pass through the corresponding first upper through holes to cooperate with the corresponding second upper through holes. One ends of the lower steel bar group pass through the corresponding second upper through holes to cooperate with the corresponding second lower through holes.

8. The box column and precast beam joint structure according to claim 6, characterized in that, The first connection holes and the second connection holes are both arranged in a matrix.

9. The box column and precast beam joint structure according to claim 1, characterized in that There is a gap between the end of the precast beam and the box-shaped column.

10. The box column and precast beam joint structure according to claim 1, characterized in that, A groove is formed by inward depression at the end of the precast beam.

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