Assembly type station bus shelter structure and assembly method

Abstract

The invention provides an assembly type station bus shelter structure and an assembly method, the bus shelter structure comprises a bearing column, the bottom end of the bearing column is inserted into a foundation where a bus shelter is located; the cross beams are installed at the top ends of the bearing columns, and the bearing columns are distributed in the axial direction of the cross beams; the ceiling is installed on the cross beam, and the ceiling is provided with a sun shield extending in the width direction of the bus shelter; an extension section is arranged at the top end of the bearing column and penetrates through the ceiling; a steel cable is further installed on the top of the ceiling, the first end of the steel cable is installed on the top of the extending section, and the second end of the steel cable is installed at the end of the sun shield. The cross beam is of an arch structure with the middle bent towards the ceiling, and a mounting groove matched with the cross beam is formed in the bottom of the ceiling.

Description

Technical Field

[0001] The present application relates to the technical field of prefabricated buildings, and in particular to a prefabricated station shelter structure and an assembly method. Background Art

[0002] In the current design of railway passenger stations, the construction of platform canopies mainly adopts two structural forms: one is a steel structure canopy based on space grid and membrane structure, and the other is a canopy based on cast-in-place concrete structure. Steel structure canopies are favored for their large span and rapid construction characteristics, and the installation process is relatively convenient. However, this structure also has some shortcomings, such as relatively poor durability and easy to produce large vibrations under the action of wind. On the other hand, cast-in-place concrete structure canopies are respected for their excellent durability and small wind vibration. Despite this, the cast-in-place construction method also has its limitations, such as the high complexity of the construction site and the relatively slow construction speed, all of which may affect the overall progress and cost of the project. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned problems and provide an assembled station shelter structure and an assembly method.

[0004] The technical solution of this application is implemented as follows:

[0005] In a first aspect, the present application provides a prefabricated station shelter structure, the shelter structure comprising:

[0006] A load-bearing column, the bottom end of which is inserted into the foundation where the bus shelter is located;

[0007] A crossbeam is installed on the top of the load-bearing column, and a plurality of the load-bearing columns are arranged along the axial direction of the crossbeam;

[0008] A roof, mounted on the crossbeam, the roof having a sunshade extending along the width direction of the bus shelter;

[0009] The top end of the load-bearing column has an extension section, and the extension section runs through the ceiling;

[0010] A steel cable is also installed on the top of the ceiling, wherein the first end of the steel cable is installed on the top of the extension section, and the second end of the steel cable is installed on the end of the sunshade;

[0011] The cross beam is in an arched structure with the middle portion bent toward the ceiling, and a mounting groove matching the cross beam is provided at the bottom of the ceiling.

[0012] The advantages or beneficial effects of the above technical solution include at least:

[0013] In a second aspect, the present application further provides an assembly method, the assembly method being based on the assembled station shelter structure as described in any one of claims 1 to 7;

[0014] The assembly method comprises the following steps:

[0015] S1. Determine the location of the bus shelter, and after determination, dig a pit at the location of the bus shelter with a depth consistent with the base of the positioning frame, and the size of the pit is equivalent to the size of the base;

[0016] S2. Determine the position of the load-bearing column at the bottom of the pit and mark it;

[0017] S3, installing the positioning frame according to the mark determined in S2, aligning the lower opening of the base with the position of the load-bearing column and installing the base on the pit, backfilling the pit, and burying the base underground;

[0018] S4, inserting the load-bearing column into the positioning cylinder through the upper opening of the positioning cylinder, and inserting the bottom of the load-bearing column into the foundation by static pressure method through the hollow structure of the positioning cylinder;

[0019] S5. After the bottom pad is installed on the load-bearing column, the cross beam is installed on the bottom pad, wherein the cross beam passes through the extension section;

[0020] S6. After the ceiling passes through the extension section, the first fixing steel bar is embedded into the ceiling, and the second fixing steel bar on the ceiling is embedded into the crossbeam;

[0021] S7. In step S6, when the ceiling passes through the extension section, the connecting block is supported to the top of the extension section. After the ceiling is completely connected to the crossbeam, the connecting block and the top of the extension section are fixed by bolts.

[0022] The advantages or beneficial effects of the above technical solution include at least:

[0023] The design concept of this system is very reasonable, which ensures that the force transmission path is clear and simple, thereby improving the overall structural efficiency. The components of the canopy are almost 100% prefabricated; since there is basically no wet work on site, the amount of garbage generated on site is very small, which keeps the construction site clean and beautiful. Each component of this prefabricated bus shelter can be processed in the factory and then transported to the site for hoisting and installation. This practice not only improves the degree of industrialization, but also makes on-site installation very convenient. This design not only has good economic benefits, but also has a positive impact on society, so it is very suitable for promotion and use. At the same time, the knotting method of the steel cable can effectively enhance the structural strength of the awning, and the specially designed arched structure of the beam can enhance the support force of the beam on the ceiling, greatly improving the stability and safety of the entire structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings illustrate exemplary implementations of the present application of embodiments of the present invention and, together with the description, are used to explain the principles of the present application. These drawings are included to provide a further understanding of the present application, and the drawings are included in and constitute a part of this specification.

[0025] Figure 1 A schematic structural diagram of a bus shelter according to an embodiment of the present invention is shown;

[0026] Figure 2 A front schematic diagram of a bus shelter according to an embodiment of the present invention is shown;

[0027] Figure 3 A schematic diagram of the first installation step of a bus shelter according to an embodiment of the present invention is shown;

[0028] Figure 4 A schematic diagram of the second installation step of a bus shelter according to an embodiment of the present invention is shown;

[0029] Figure 5 A schematic diagram showing the third installation step of the bus shelter according to an embodiment of the present invention is shown;

[0030] Figure 6 A schematic diagram showing the steps of installing a crossbeam according to an embodiment of the present invention is shown;

[0031] Figure 7 A schematic diagram showing the fourth installation step of the bus shelter according to an embodiment of the present invention is shown;

[0032] Figure 8 It shows a schematic diagram of the fifth installation step of the bus shelter according to the embodiment of the present invention;

[0033] Fig. 9 A bottom schematic diagram of a ceiling according to an embodiment of the present invention is shown;

[0034] Fig.10 A cross-sectional schematic diagram of a beam according to an embodiment of the present invention is shown;

[0035] Fig.11 A schematic diagram showing the positions of the first positioning protrusion and the second positioning protrusion according to an embodiment of the present invention is shown;

[0036] Fig.12 A schematic structural diagram of a load-bearing column according to an embodiment of the present invention is shown;

[0037] Fig.13A cross-sectional view of an embodiment of the present invention after the first fixed steel bar is embedded in the ceiling is shown; figure numerals: 10, load-bearing column; 11, extension section; 12, first fixed steel bar; 13, first positioning groove; 14, second positioning groove; 20, crossbeam; 21, connecting section; 211, connecting steel bar; 212, connecting hole; 22, first positioning protrusion; 23, second positioning protrusion; 30, ceiling; 31, installation groove; 32, second fixed steel bar; 33, steel cable; 331, connecting block; 34, sun visor; 40, positioning frame; 41, base; 411, lower opening; 42, positioning cylinder; 421, upper opening; 50, bottom pad; 60, foundation. DETAILED DESCRIPTION

[0038] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided for a more thorough and complete understanding of the present application. It should be understood that the drawings and embodiments of the present application are only for exemplary purposes and are not intended to limit the scope of protection of the present application.

[0039] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] It should be understood that the term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions of other terms will be given in the description below. It should be noted that the concepts of "first", "second", etc. mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0041] It should be noted that the modifications of "one" and "plurality" mentioned in the present application are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0042] The names of the messages or information exchanged between multiple devices in the embodiments of the present application are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0043] Reference Figure 1 An assembled station shelter structure, the shelter structure comprising:

[0044] The load-bearing column 10 has its bottom end inserted into the foundation 60 where the bus shelter is located;

[0045] The cross beam 20 is installed at the top of the load-bearing column 10. Several load-bearing columns 10 are arranged along the axial direction of the cross beam 20. Preferably, three load-bearing columns 10 are installed at equal distances.

[0046] The ceiling 30 is installed on the crossbeam 20. The ceiling 30 has a sunshade 34 extending along the width direction of the bus shelter. Furthermore, the crossbeam 20 is an arched structure with the middle part bent toward the ceiling 30. When the arched structure is under pressure, the pressure will be dispersed to both sides along the curve of the arch. Unlike a plane structure, when a plane structure is under pressure, the pressure will be directly transmitted downward, which can easily cause deformation or damage to the structure. The arched structure disperses the pressure so that the pressure is evenly distributed on the entire curved surface of the arch, thereby reducing local pressure concentration and reducing the risk of damage to the structure due to excessive local force, thereby increasing the ability of the crossbeam 20 to bear the ceiling 30;

[0047] The positioning frame 40 includes: a base 41, which is installed on the surface of the foundation 60; a positioning tube 42, which is integrally formed on the base 41. The positioning tube 42 is hollow, and the top of the positioning tube 42 also has an upper opening 421. The middle part of the positioning tube 42 fits with the load-bearing column 10. The base 41 is also provided with a lower opening 411 connected to the middle part of the positioning tube 42, so that the load-bearing column 10 can pass through the middle part of the positioning tube 42 through the upper opening 421, and then extend into the foundation 60 through the lower opening 411. The positioning tube 42 of the positioning frame 40 can facilitate the installation of the load-bearing column 10, reduce the installation error, and ensure the accuracy of the installation of the load-bearing column 10.

[0048] The shelter structure further includes: a bottom pad 50 installed on the load-bearing column 10 near a position below the cross beam 20 , and the cross beam 20 is installed above the bottom pad 50 to assist in the installation of the cross beam 20 .

[0049] Further improvement based on the above structure: an extension section 11 is provided at the top of the load-bearing column 10, and the extension section 11 runs through the ceiling 30; a steel cable 33 is also installed on the top of the ceiling 30, and the first end of the steel cable 33 is installed on the top of the extension section 11, and the second end is installed on the end of the sunshade 34; Figure 1As shown, through the pulling of the steel cable 33, the top of the sun visor 34 is subjected to an inward pulling force, thereby enhancing the yield degree of the connection between the sun visor 34 and the middle part of the ceiling 30, and effectively strengthening the structural strength of the ceiling 30 sun visor 34; preferably, the top part of the ceiling 30 is divided into a number of pulling areas of equal size, and at least four steel cables 33 are installed in each pulling area. The first ends of the four steel cables 33 are interconnected by connecting blocks 331, and the second ends are fixed to the four corners of the sun visor 34 in the pulling area; the connecting block 331 is detachably connected to the top of the extension section 11 by bolts, so that after the bus shelter is assembled, the first end of the steel cable 33 is fixed to the top of the extension section 11.

[0050] Furthermore, a mounting groove 31 matching with the beam 20 is opened at the bottom of the ceiling 30. When the ceiling 30 is installed, the top part of the beam 20 is embedded in the mounting groove 31. Similarly, the mounting groove 31 also adapts to the arched structure of the beam 20, so that the inside of the mounting groove 31 fits with the top of the beam 20.

[0051] Based on the further improvement of the above structure, the cross beam 20 includes a plurality of interconnected connecting sections 21, and connecting steel bars 211 are inserted between the connecting sections 21. The portion corresponding to each connecting section 21 and the connecting steel bar 211 is provided with a connecting hole 212, and the connecting steel bar 211 extends into the connecting hole 212. Preferably, the cross beam 20 includes three interconnected connecting sections 21, from Figure 6 As can be seen in the figure, the connection surfaces on both sides of the middle part are inclined upwards. When installing, the middle connection section 21 is installed first, and then the connection sections 21 on both sides are installed, so that the cross beam 20 is split into three independent connection sections 21. The connection sections 21 can effectively form a complete and continuous arch structure. By splitting the cross beam 20 into multiple connection sections 21, not only can the transportation process of the components be simplified, but also the production efficiency can be improved, because smaller components are easier to carry and assemble.

[0052] Furthermore, the portion between the load-bearing column 10 and the extension section 11 also has a first fixing steel bar 12 extending upward, which passes through the beam 20 and is embedded in the ceiling 30; there are also a number of second fixing steel bars 32 extending downward under the ceiling 30, and the second fixing steel bars 32 are embedded in the beam 20 to ensure the connection strength between the ceiling 30 and the beam 20.

[0053] As a further improvement of the above structure, the portion of the load-bearing column 10 close to the extension section 11 is further provided with a first positioning groove 13 and a second positioning groove 14, the depth of the first positioning groove 13 is greater than the depth of the second positioning groove 14; the first positioning groove 13 is located on the side of the load-bearing column 10 close to the length direction of the bus shelter; the second positioning groove 14 is located on the side of the load-bearing column 10 close to the width direction of the bus shelter; the portion of the crossbeam 20 corresponding to the first positioning groove 13 has a first positioning protrusion 22; the portion of the crossbeam 20 corresponding to the second positioning groove 14 has a second positioning protrusion 23, the second positioning protrusion 23 can be embedded in the second positioning groove 14, and the first positioning protrusion 22 can be embedded in the first positioning groove 13;

[0054] When the cross beam 20 is fixed to the load-bearing column 10, the second positioning protrusion 23 is embedded in the second positioning groove 14, and the first positioning protrusion 22 is embedded in the first positioning groove 13. The different depths of the first positioning groove 13 and the second positioning groove 14 can avoid direction errors during installation. If the installation direction is wrong, the first positioning protrusion 22 cannot be fully embedded in the second positioning groove 14 of the wrong depth.

[0055] An embodiment of the present invention further provides an assembly method. The assembly method of this embodiment is based on the assembled station shelter structure according to any one of claims 1 to 7;

[0056] The assembly method includes the following steps:

[0057] S1, determine the location of the bus shelter, and after determination, dig a pit at the location of the bus shelter with a depth consistent with the base 41 of the positioning frame 40, and the size of the pit is comparable to the size of the base 41, such as Figure 3 As shown;

[0058] S2, determine the position of the load-bearing column 10 at the bottom of the pit and mark it;

[0059] S3, install the positioning frame 40 according to the mark determined in S2, align the lower opening 411 of the base 41 with the position of the load-bearing column 10 and install the base 41 on the pit, backfill the pit, and bury the base 41 underground, as shown in FIG. Figure 3 As shown;

[0060] S4, insert the load-bearing column 10 into the positioning tube 42 through the upper opening 421 of the positioning tube 42, and insert the bottom of the load-bearing column 10 into the foundation 60 by using the static pile driver equipment to implement the pile foundation static pressure method through the hollow structure of the positioning tube 42, as shown in FIG. Figure 4 As shown; it should be noted that after the load-bearing column 10 is inserted into the foundation 60, the positioning frame 40 can also be pulled out, and the positioning frame 40 does not necessarily need to be retained at the bottom of the bus shelter;

[0061] S5, after installing the bottom pad 50 on the load-bearing column 10, install the cross beam 20 on the bottom pad 50, wherein the cross beam 20 passes through the extension section 11, as shown in FIG. Figure 5 As shown;

[0062] S6. After the ceiling 30 passes through the extension section 11, the first fixing steel bar 12 is embedded in the ceiling 30, and the second fixing steel bar 32 on the ceiling 30 is embedded in the cross beam 20. It is necessary to pour concrete into the hole of the ceiling 30 that accommodates the first fixing steel bar 12, and pour concrete into the hole of the cross beam 20 that accommodates the second fixing steel bar 32. After the steel bars are embedded, wait for the concrete to solidify to complete the fixation; Figure 7 shown.

[0063] S7, in step S6, when the ceiling 30 passes through the extension section 11, the connecting block 331 is supported to the top of the extension section 11. After the ceiling 30 is completely connected to the crossbeam 20, the connecting block 331 and the top of the extension section 11 are fixed by bolts to complete the installation;

[0064] It is worth noting that before the ceiling 30 is installed, the steel cable 33 has been installed on the top of the sun visor 34. This is because the steel cable 33 is installed when the ceiling 30 component is manufactured, and of course it is also installed together with the connecting block 331. When the ceiling 30 is installed, it is lifted together with the steel cable 33. After the connecting block 331 is fixed to the top of the extension section 11, the steel cable 33 will be straightened to achieve the tensioning effect.

[0065] Furthermore, in step S5, the method of installing the crossbeam 20 on the bottom pad 50 includes the following steps:

[0066] S51, dividing the cross beam 20 into three connecting sections 21, wherein the connecting surfaces on both sides of the middle cross beam 20 are inclined upward;

[0067] S52, installing the connecting section 21 near the middle on the load-bearing column 10, so that the first positioning protrusion 22 of the connecting section 21 is embedded in the first positioning groove 13, and the second positioning protrusion 23 is embedded in the second positioning groove 14;

[0068] S53. Pour concrete into the connecting holes 212 on each connecting section 21, insert the connecting steel bars 211 of the connecting sections 21 on the left and right sides into the connecting holes 212 of the connecting section 21 in the middle, and insert the connecting steel bars 211 of the connecting section 21 in the middle into the connecting holes 212 of the connecting sections 21 on the left and right sides; at the same time, install the connecting sections 21 on the left and right sides on the load-bearing columns 10 so that the first positioning protrusion 22 of the connecting section 21 is embedded in the first positioning groove 13, and the second positioning protrusion 23 is embedded in the second positioning groove 14.

[0069] In the description of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0070] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present application, and are not intended to limit the scope of the present application. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present application.

Claims

1. An assembled station shelter structure, characterized in that: The bus shelter structure comprises: A load-bearing column (10), the bottom end of which is inserted into the foundation (60) where the bus shelter is located; A crossbeam (20) is installed on the top of the load-bearing column (10), and a plurality of the load-bearing columns (10) are arranged along the axial direction of the crossbeam (20); A roof (30) is mounted on the crossbeam (20), wherein the roof (30) has a sunshade (34) extending along the width direction of the bus shelter; The top end of the load-bearing column (10) is provided with an extension section (11), and the extension section (11) passes through the ceiling (30); A steel cable (33) is also installed on the top of the ceiling (30), wherein a first end of the steel cable (33) is installed on the top of the extension section (11), and a second end of the steel cable (33) is installed on the end of the sunshade (34); The cross beam (20) is in the form of an arched structure with the middle portion bent toward the ceiling (30), and a mounting groove (31) matching the cross beam (20) is provided at the bottom of the ceiling (30).

2. The assembled station shelter structure according to claim 1 is characterized in that: The crossbeam (20) comprises a plurality of interconnected connecting sections (21), connecting steel bars (211) are inserted between the connecting sections (21), and a connecting hole (212) is provided at a portion of each connecting section (21) corresponding to the connecting steel bar (211), and the connecting steel bar (211) extends into the connecting hole (212).

3. The assembled station shelter structure according to claim 2 is characterized in that: The portion between the load-bearing column (10) and the extension section (11) also has a first fixing steel bar (12) extending upward, and the first fixing steel bar (12) passes through the cross beam (20) and is embedded in the ceiling (30); A plurality of second fixing steel bars (32) extending downward are also provided below the ceiling (30), and the second fixing steel bars (32) are embedded in the crossbeam (20).

4. The assembled station shelter structure according to claim 1 is characterized in that: The bus shelter structure further comprises a positioning frame (40), and the positioning frame (40) comprises: A base (41) is installed on the surface of the foundation (60); A positioning tube (42) is integrally formed on the base (41); the positioning tube (42) is hollow and has an upper opening (421) at the top; the middle of the positioning tube (42) fits with the load-bearing column (10); the base (41) is also provided with a lower opening (411) connected to the middle of the positioning tube (42), so that the load-bearing column (10) can pass through the middle of the positioning tube (42) through the upper opening (421) and then extend into the foundation (60) through the lower opening (411).

5. The assembled station shelter structure according to claim 1 is characterized in that: A first positioning groove (13) and a second positioning groove (14) are also provided at a portion of the load-bearing column (10) close to the extension section (11), and the depth of the first positioning groove (13) is greater than the depth of the second positioning groove (14); The first positioning groove (13) is located on the side of the load-bearing column (10) close to the length direction of the bus shelter; The second positioning groove (14) is located on the side of the load-bearing column (10) close to the width direction of the bus shelter; The portion of the crossbeam (20) corresponding to the first positioning groove (13) has a first positioning protrusion (22), and the first positioning protrusion (22) can be embedded in the first positioning groove (13); The portion of the crossbeam (20) corresponding to the second positioning groove (14) has a second positioning protrusion (23), and the second positioning protrusion (23) can be embedded in the second positioning groove (14).

6. The assembled station shelter structure according to claim 1 is characterized by: The top portion of the ceiling (30) comprises a plurality of tie-in areas of equal size, each tie-in area being provided with at least four steel cables (33), the first ends of the four steel cables (33) being connected to each other via a connecting block (331), and the second ends being fixed to the sunshade (34) at the four corners of the tie-in area; The connecting block (331) is detachably connected to the top end of the extension section (11) via bolts.

7. The assembled station shelter structure according to claim 1 is characterized by: The shelter structure further comprises: A bottom pad (50) is installed on the load-bearing column (10) at a position below the crossbeam (20), and the crossbeam (20) is installed above the bottom pad (50).

8. An assembly method, characterized in that: The assembly method is based on the assembled station shelter structure as described in any one of claims 1 to 7; The assembly method comprises the following steps: S1, determining the location of the bus shelter, and after determination, digging a pit at the location of the bus shelter with a depth consistent with the base (41) of the positioning frame (40), and the size of the pit is comparable to the size of the base (41); S2, determine the position of the load-bearing column (10) at the bottom of the pit and mark it; S3, installing the positioning frame (40) according to the mark determined in S2, aligning the lower opening (411) of the base (41) with the position of the load-bearing column (10), installing the base (41) on the pit, backfilling the pit, and burying the base (41) underground; S4, inserting the load-bearing column (10) into the positioning tube (42) through the upper opening (421) of the positioning tube (42), and inserting the bottom of the load-bearing column (10) into the foundation (60) by static pressure through the hollow structure of the positioning tube (42); S5. After the base pad (50) is installed on the load-bearing column (10), the cross beam (20) is installed on the base pad (50), wherein the cross beam (20) passes through the extension section (11); S6. After the ceiling (30) passes through the extension section (11), the first fixing steel bar (12) is embedded in the ceiling (30), and at the same time, the second fixing steel bar (32) on the ceiling (30) is embedded in the cross beam (20); S7. In step S6, when the ceiling (30) passes through the extension section (11), the connecting block (331) is supported to the top of the extension section (11). After the ceiling (30) is completely connected to the crossbeam (20), the connecting block (331) and the top of the extension section (11) are fixed by bolts.

9. The assembly method according to claim 8, characterized in that: In step S5, the method of installing the crossbeam (20) on the base pad (50) comprises the following steps: S51, dividing the cross beam (20) into three connecting sections (21), wherein the connecting surfaces on both sides of the middle cross beam (20) are inclined upward; S52, installing the connecting section (21) near the middle on the load-bearing column (10), so that the first positioning protrusion (22) of the connecting section (21) is embedded in the first positioning groove (13), and the second positioning protrusion (23) is embedded in the second positioning groove (14); S53, concrete is poured into the connection hole (212) on each connection section (21), the connection steel bars (211) of the connection sections (21) on the left and right sides are inserted into the connection hole (212) of the middle connection section (21), and the connection steel bars (211) of the middle connection section (21) are inserted into the connection holes (212) of the connection sections (21) on the left and right sides; at the same time, the connection sections (21) on the left and right sides are installed on the load-bearing column (10) so that the first positioning protrusion (22) of the connection section (21) is embedded in the first positioning groove (13), and the second positioning protrusion (23) is embedded in the second positioning groove (14).

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