Method for assembling a roof of a cable-supported grid

Abstract

This application provides a method for assembling a tensioned grid inner roof, relating to the field of building steel structure technology. The method includes prefabricating the inner chord and outer sealing pipe in sections; prefabricating the connecting brackets into a first bracket and a second bracket; prefabricating the rhomboid grid, first ear plate, first strut, cable system, upper pressure ring, second strut, and lower tension ring; assembling the chord sections, the remaining components of the ring truss, the sealing pipe sections, the upper pressure ring, the lower tension ring, and the second strut; assembling the first bracket; assembling the second bracket; adjusting the position of the second bracket so that it is perpendicular to the first bracket; assembling the rhomboid grid; assembling the cable system; assembling and welding the first ear plate; assembling the first strut; and tensioning the cables. This application achieves a precise connection between the inner roof and the outer roof.

Description

Technical Field

[0001] This application relates to the field of building steel structure technology, and in particular to a method for assembling a tensioned grid inner roof. Background Technology

[0002] Tensed grids have the advantages of being lightweight, having a large span, and being able to achieve complex curved surfaces. They also have potential advantages in improving wind and earthquake resistance. Therefore, they have been widely used in the field of large-span public buildings and have become one of the preferred structural forms for large landmark buildings such as stadiums, convention centers, airport terminals, and transportation hubs.

[0003] With the innovative application of tensioned grid structures, new hybrid structural systems have gradually evolved from traditional grid shell systems. In these hybrid systems, high-stiffness annular trusses or tubular trusses are typically used as the main load-bearing boundaries, bearing the thrust and deformation constraints from the internal structure. The internal structure employs a large-span tensioned grid system, providing elastic support to the grid shell through a cable-stayed system, thereby improving its internal force distribution. The external trusses and internal structure are usually connected by circumferentially arranged corbels and hinged supports. This connection method effectively transfers loads while allowing the internal structure to undergo rotation and displacement under temperature, wind, or seismic loads, avoiding excessive additional bending moments on the external trusses. This structural system has been used in roof systems for large stadiums, central skylights for airport terminals, and skylights for various large shopping malls, forming a combined roof system of large-span external and internal roofs.

[0004] The existing 100-meter span composite roof structure uses a ring truss for the outer roof and a tensioned grid for the inner roof. The outer and inner roofs are connected by circumferentially arranged connecting brackets. The ring truss consists of a central main truss, outer cantilever trusses distributed on both sides of the main truss, and inner cantilever trusses. The inner cantilever trusses are composed of web members and inner chord members. The tensioned grid includes an outer sealing tube, a diamond-shaped grid, a first ear plate, a first strut, a cable system, an upper pressure ring, a second strut, and a lower pull ring. The diamond-shaped grid connects the outer sealing tube and the upper pressure ring, and the cable system connects the outer sealing tube and the lower pull ring. The upper pressure ring and the lower pull ring are connected by the second strut. The cable system is connected to the diamond grid via a first strut. The cable system includes a cable, a locking clip, and a third ear plate evenly spaced around the outer wall of the pull ring. The cable and the pull ring are hinged together by the third ear plate pin. The first ear plate is located at the bottom of the diamond grid, and the first strut is hinged to the diamond grid by the first ear plate pin. The first strut and the locking clip are connected by a ball joint. The connecting bracket is L-shaped, and the outer sealing tube is evenly spaced around the second ear plate. The lower part of the connecting bracket is vertically connected to the inner chord, and the upper part of the connecting bracket is hinged to the second ear plate vertically by a pin. The number of second ear plates is equal to the number of third ear plates.

[0005] The aforementioned technologies present the following construction challenges: First, the extremely small clearance between the pin connections of the tensioned mesh inner roof and the outer truss roof makes it difficult to assemble and connect the tensioned mesh inner roof to the outer roof. Second, the extremely small clearance between the pin connections of the cable system and the diamond-shaped mesh makes it difficult to guarantee the verticality of the second strut after the cable system is assembled. Third, the second strut is connected to the cable system via a ball joint, which prevents the second strut from maintaining verticality during tensioning, resulting in eccentric force transmission. These construction challenges lead to poor forming quality of the tensioned mesh inner roof and make it impossible to accurately assemble and connect it to the outer roof. Summary of the Invention

[0006] In order to overcome the technical problems described in the prior art, this application provides a method for assembling a tensioned grid inner roof.

[0007] The method for assembling a tensioned grid inner roof provided in this application adopts the following technical solution: A method for assembling a tensioned grid roof includes the following steps: S1, the inner chord is divided into multiple chord segments for prefabrication, the outer sealing tube is divided into multiple sealing tube segments for prefabrication, and the connecting bracket is divided into the first bracket and the second bracket for prefabrication. The second bracket is located above the first bracket and is perpendicular to the first bracket. The diamond grid, the first ear plate, the first strut, the cable system, the upper pressure ring, the second strut, and the lower pull ring are prefabricated. S2, complete the assembly of the chord segments, complete the assembly of the remaining components of the ring truss, complete the assembly of the sealing pipe segments, and complete the assembly of the upper pressure ring, lower pull ring, and second strut. Among them, when assembling the sealing pipe segments, the spatial coordinates of the center of the second ear plate pin hole are measured to locate the sealing pipe segments. When assembling the lower pull ring, the spatial coordinates of the center of the third ear plate pin hole are measured to locate the lower pull ring. S3, Assemble the first bracket. First, adjust the position of the first bracket so that the top wall of the first bracket is parallel to the horizontal plane. Then, adjust the position of the first bracket again so that the distance deviation between the geometric center of the top wall of the first bracket and the center of the second ear plate pin hole is ≤1mm. S4, Assemble the second bracket. First, complete the pin connection between the second bracket and the second ear plate, and then adjust the position of the second bracket so that the second bracket is perpendicular to the first bracket. S5, complete the assembly of the diamond grid; S6, completes the assembly of the cable system; S7, Assemble the first ear plate and adjust its position so that the center surfaces of the two side walls of the first ear plate are aligned with the center line of the cable; S8, Weld the first ear plate; S9, Assemble the first support rod, adjust the angle of the first support rod so that the first support rod is perpendicular to the horizontal plane, and spot weld the second connecting plate between the first support rod and the cable clamp to temporarily fix the first support rod and the cable clamp; S10 completes the tensioning of the cable.

[0008] Furthermore, in step S1, during the prefabrication of the cable system, the cable is first tensioned to make the cable force value greater than the design cable force value and not less than 50% of the nominal breaking force value of the cable. Then, the cable is tensioned a second time to make the cable force value equal to the design cable force value, and the position of the cable clamp on the cable is marked.

[0009] Furthermore, in step S1, the number of sealing pipe segments is the same as the number of chord segments.

[0010] Furthermore, in step S4, after the second bracket is assembled, a first connecting plate is spot-welded between the second bracket and the second ear plate to temporarily fix the second bracket and the second ear plate.

[0011] Furthermore, in step S6, when assembling the cable system, the cables are tensioned to ensure that the cable force is ≤0.5KN.

[0012] Furthermore, in step S5, after the diamond mesh is assembled, the inner chord and outer sealing tube are welded simultaneously, then the first bracket and the inner chord are welded, then the second bracket and the first bracket are welded, then the upper pressure ring and the lower pull ring are welded simultaneously, and finally the diamond mesh is welded.

[0013] Furthermore, in step S9, one side of the second connecting plate is smoothly and firmly connected to the outer wall of the cable clamp, and the other side is smoothly and firmly connected to the outer wall of the first support rod.

[0014] Furthermore, in step S9, the side of the second connecting plate, the outer wall of the cable clamp, and the outer wall of the first strut together form a triangular structure.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. By dividing the connecting bracket into two components, the pin hinge connection between the inner and outer roofs is transformed into a welded connection of the two components, thus achieving a precise connection between the inner roof and the outer roof. 2. By assembling the first ear plate using the pre-tightened cables after assembly as the positioning reference, a precise connection between the cable system and the diamond grid was achieved; 3. By temporarily converting the ball joint connection between the first strut and the cable clamp into a rigid connection, the shape and position control of the inner roof during tensioning was achieved. This solved the problems of poor forming quality of the inner roof of the tensioned grid and the inability to accurately assemble and connect it to the outer roof. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A structural schematic diagram of the combined roof provided in this application.

[0018] Figure 2 for Figure 1 A partial enlarged view of the connection node between the inner chord and the outer sealing tube.

[0019] Figure 3 for Figure 1 Enlarged view of the middle rhomboid mesh and the connection node of the first strut.

[0020] Figure 4 for Figure 1 A magnified view of the connection node between the first strut and the cable system.

[0021] Figure 5 for Figure 1 Enlarged view of the upper and middle pressure ring, the second support rod, and the lower pull ring structure.

[0022] Figure 6 This is a schematic diagram of the first process of assembling a tensioned grid inner roof, as provided in an embodiment of this application.

[0023] Figure 7 This is a schematic diagram of the second process of assembling a tensioned grid inner roof, as provided in an embodiment of this application.

[0024] Figure 8 This is a schematic diagram of the third process of assembling a tensioned grid inner roof, as provided in an embodiment of this application.

[0025] Figure 9 This is a schematic diagram of the fourth process of assembling a tensioned grid inner roof, as provided in an embodiment of this application.

[0026] Figure 10 This is a schematic diagram of the fifth process of assembling a tensioned grid inner roof, as provided in an embodiment of this application.

[0027] Figure 11 This is a schematic diagram of the sixth process of assembling a tensioned grid inner roof, as provided in an embodiment of this application.

[0028] Figure 12 This is a first connection plate arrangement diagram provided for an embodiment of this application.

[0029] Figure 13 This is a diagram showing the arrangement of the second connecting plate provided in an embodiment of this application.

[0030] Reference numerals: 1. Ring truss; 11. Inner chord; 2. Tensioned mesh; 21. Outer sealing tube; 211. Second ear plate; 22. Diamond mesh; 23. First ear plate; 24. First strut; 25. Cable system; 251. Cable; 252. Cable clamp; 26. Upper pressure ring; 27. Second strut; 28. Lower pull ring; 281. Third ear plate; 3. Connecting bracket; 31. First bracket; 32. Second bracket; 4. First connecting plate; 5. Second connecting plate. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0032] This application discloses a method for assembling a tensioned grid inner roof.

[0033] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The outer roof uses a ring truss 1, and the inner roof uses a tensioned grid 2. The outer and inner roofs are hinged together by circumferentially arranged connecting brackets 3. The ring truss 1 consists of a central main truss, outer cantilever trusses distributed on both sides of the main truss, and inner cantilever trusses. The inner cantilever trusses are composed of web members and inner chord members 11. The tensioned grid 2 includes an outer sealing tube 21, a diamond-shaped grid 22, a first ear plate 23, a first strut 24, a cable system 25, an upper pressure ring 26, a second strut 27, and a lower pull ring 28. The diamond-shaped grid 22 is connected between the outer sealing tube 21 and the upper pressure ring 26, and the cable system 25 is connected between the outer sealing tube 21 and the lower pull ring 28. The upper pressure ring 26 and the lower pull ring 28 are connected by the second strut 27, and the cable system 25 and the diamond-shaped grid 22 are connected by the first strut 24. 25 includes a cable 251, a locking clip, and a third ear plate 281 arranged circumferentially at equal intervals on the outer wall of the pull ring 28. The cable 251 and the pull ring 28 are hinged together by the third ear plate 281 through a pin. The first ear plate 23 is located at the lower part of the rhomboid mesh 22. The first support rod 24 is hinged to the rhomboid mesh 22 through the first ear plate 23 through a pin. The first support rod 24 and the locking clip are connected by a ball joint. The connecting bracket 3 is L-shaped. The outer sealing tube 21 is arranged with multiple second ear plates 211 arranged circumferentially at equal intervals. The second ear plates 211 and the outer sealing tube 21 are welded together with ribs for fixing the two together. The lower part of the connecting bracket 3 is vertically connected to the inner chord 11, and the upper part of the connecting bracket 3 is vertically hinged to the second ear plate 211 through a pin. The number of second ear plates 211 is equal to the number of third ear plates 281.

[0034] The assembly method for the tensioned grid roof includes the following steps: S1, as Figure 6 and Figure 7The ring truss 1 is divided into multiple components for prefabrication. The prefabricated components include the inner chord 11, which is divided into 12 chord segments. The tension grid 2 is also divided into multiple components for prefabrication. The prefabricated components include the outer sealing tube 21, the diamond grid 22, the first ear plate 23, the first strut 24, the cable system 25, the upper pressure ring 26, the second strut 27, and the lower tension ring 28. The outer sealing tube 21 is divided into 12 sealing tube segments, the number of which is the same as the number of chord segments. This ensures that the number of welds on the inner chord 11 is the same as the number of welds on the outer sealing tube 21, thus guaranteeing the weld shrinkage of the inner chord 11. The welding shrinkage is basically consistent with that of the outer sealing tube 21; when the cable system 25 is prefabricated, the cable 251 is first tensioned to make the cable force value of the cable 251 greater than the design cable force value and not less than 50% of the nominal breaking force value of the cable 251. Then the cable 251 is tensioned a second time to make the cable force value of the cable 251 equal to the design cable force value, and the position of the cable clamp 252 on the cable 251 is marked; the connecting bracket 3 is broken at the 90° corner of the L-shaped structure and divided into the first bracket 31 and the second bracket 32 ​​for prefabrication. The second bracket 32 ​​is located on the upper part of the first bracket 31 and is perpendicular to the first bracket 31.

[0035] S2, as Figure 8 , Figure 9 and Figure 12 The assembly of the chord segments is completed; the assembly of the remaining components of the ring truss 1 is completed; and the assembly of the sealing pipe segments is completed. Among them, the tensioned grid 2 is a structural system that combines rigidity and flexibility. The connection accuracy between the flexible cable system 25 and the rigid grid structure is crucial and directly affects the overall shape of the tensioned grid 2 after it is formed. Therefore, it is necessary to ensure the relative positional accuracy between the cable system 25 and the grid structure. The cable 251 is connected between the lower pull ring 28 and the outer sealing pipe 21. To ensure the assembly accuracy of the cable 251, it is necessary to ensure the spatial positional accuracy of the second ear plate 211 and the third ear plate 281. Therefore, when assembling the outer sealing pipe 21, it is positioned by the spatial coordinates of the center of the pin hole of the second ear plate 211, and when assembling the lower pull ring 28, it is positioned by the spatial coordinates of the center of the pin hole of the third ear plate 281, thereby ensuring the connection accuracy of the cable 251. Then, the assembly of the upper pressure ring 26, the lower pull ring 28, and the second support rod 27 is completed.

[0036] In the prior art, when the inner chord 11 and the connecting bracket 3 are prefabricated, the connecting bracket 3 is usually welded to the inner chord 11 to reduce the amount of on-site assembly work. When assembling the outer sealing pipe 21, the second ear plate 211 is first connected to the connecting bracket 3 by a pin, and then the spatial position of the outer sealing pipe 21 is finely adjusted. This often results in a large misalignment between adjacent sealing pipe segments. If the spatial position of the outer sealing pipe 21 is adjusted first, and then the second ear plate 211 is connected to the connecting bracket 3, the pin is difficult to insert. This makes it difficult to assemble and connect the inner roof of the tensioned grid 2 to the outer roof. In this embodiment, if... Figure 8 , Figure 9 and Figure 12 The connecting bracket 3 is divided into the first bracket 31 and the second bracket 32 ​​for prefabrication. After the inner chord rod 11 and the outer sealing tube 21 are assembled, the first bracket 31 and the second bracket 32 ​​are assembled in sequence, which can solve the above problems. The specific assembly steps are as follows: S3 and S4.

[0037] S3, as Figure 8 , Figure 9 and Figure 12 Assemble the first bracket 31, and adjust the spatial position of the first bracket 31 with the center of the pin hole of the second ear plate 211 as the reference, so that the top wall surface of the first bracket 31 is parallel to the horizontal plane. Adjust the position of the first bracket 31 again so that the distance deviation between the geometric center of the top wall surface of the first bracket 31 and the center of the pin hole of the second ear plate 211 is ≤1mm.

[0038] S4, as Figure 8 , Figure 9 and Figure 12Assemble the second bracket 32. First, complete the pin connection between the second bracket 32 ​​and the second ear plate 211, and then adjust the position of the second bracket 32 ​​so that the second bracket 32 ​​is perpendicular to the first bracket 31. The second bracket 32 ​​is in a vertical state to ensure the vertical transmission of the load. By ensuring that the distance deviation between the geometric center of the top wall of the first bracket 31 and the center of the pin hole of the second ear plate 211 is ≤1mm, it can be guaranteed that after the second bracket 32 ​​is assembled, the misalignment between the second bracket 32 ​​and the first bracket 31 is ≤1mm, thus avoiding the first bracket 31 bearing eccentric loads. Through the segmented assembly process of connecting bracket 3 in this embodiment, the inner roof is precisely assembled and connected to the outer roof, while ensuring that the connecting bracket 3 is in a normal load-bearing state, thus guaranteeing structural safety. After the outer sealing pipe 21, the first bracket 31, the second bracket 32, and the inner chord 11 are assembled, the connection between the components is not rigid because welding is not yet complete. During the component welding process, there is relative displacement between the first bracket 31, the second bracket 32, and the second ear plate 211. Therefore, after the second bracket 32 ​​is assembled, a first connecting plate 4 is spot-welded between the second bracket 32 ​​and the second ear plate 211 to temporarily fix the second bracket 32 ​​and the second ear plate 211, which can ensure that the second bracket 32 ​​and the second ear plate 211 are in a vertical state. Since the second ear plate 211 and the second bracket 32 ​​are not coplanar, when spot welding the first connecting plate 4, one side of the first connecting plate 4 is smoothly attached to the rib and the other side is smoothly attached to the side of the second bracket 32, so that the second bracket 32 ​​and the second ear plate 211 can be temporarily fixed under the connecting action of the first connecting plate 4.

[0039] S5, such as Figure 10 After the diamond grid 22 is assembled, first weld the inner chord 11 and the outer sealing tube 21 simultaneously, then weld the first bracket 31 and the inner chord 11, then weld the second bracket 32 ​​and the first bracket 31, then weld the upper pressure ring 26 and the lower pull ring 28 simultaneously, and finally weld the diamond grid 22.

[0040] S6, such as Figure 11 To complete the assembly of the cable system 25, in the prior art, when the rhomboid mesh 22 and the first ear plate 23 are prefabricated, the first ear plate 23 is often welded to the rhomboid mesh 22 component and assembled together on site. However, when assembling the first support rod 24, the first support rod 24 cannot be in a vertical state due to the misalignment between the first ear plate 23 and the cable 251. In this embodiment, after the mesh shell structure of the tensioned mesh 2 is assembled, the cable 251 is assembled first and the cable 251 is pre-tightened. The cable 251 is tensioned so that the cable force value of the cable 251 is ≤0.5KN.

[0041] S7. Assemble the first ear plate 23 based on the line shape of the cable 251. Adjust the position of the first ear plate 23 so that the center planes of the two side walls of the first ear plate 23 are aligned with the center line of the cable 251. This ensures the relative positional accuracy between the first ear plate 23 and the cable 251, thereby ensuring that the first strut 24 is in a vertical state during assembly. This greatly improves the connection accuracy between the cable system 25 and the shell structure, thereby ensuring that the tensioned mesh 2 is in the designed mechanical state after it is formed.

[0042] S8, weld the first ear plate 23.

[0043] S9, Assemble the first support rod 24, and adjust the angle of the first support rod 24 so that the first support rod 24 is perpendicular to the horizontal plane; as follows. Figure 4 and Figure 13 The first strut 24 and the cable clamp 252 are connected by a ball joint, which causes irregular slippage between them during tensioning, resulting in cable force loss and structural shape deviation, directly affecting the final forming quality of the structure. In this embodiment, after the first strut 24 is assembled, a second connecting plate 5 is set between the first strut 24 and the cable clamp 252. One side of the second connecting plate 5 is stably connected to the outer wall of the cable clamp 252, and the other side is stably connected to the outer wall of the first strut 252, so that the side of the second connecting plate 5, the outer wall of the cable clamp 252, and the outer wall of the first strut 252 together form a stable triangular structure. By temporarily transforming the ball joint node between the first strut 24 and the cable clamp 252 into a stable rigid node through the second connecting plate 5, the irregular displacement of the first strut 24 is restricted, thus ensuring the vertical state of the first strut 24 during tensioning.

[0044] S10, complete the tensioning of cable 251.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for assembling a tensioned grid inner roof, characterized in that, Includes the following steps: S1, the inner chord is divided into multiple chord segments for prefabrication, the outer sealing tube is divided into multiple sealing tube segments for prefabrication, and the connecting bracket is divided into the first bracket and the second bracket for prefabrication. The second bracket is located above the first bracket and is perpendicular to the first bracket. The diamond grid, the first ear plate, the first strut, the cable system, the upper pressure ring, the second strut, and the lower pull ring are prefabricated. S2, complete the assembly of the chord segments, complete the assembly of the remaining components of the ring truss, complete the assembly of the sealing pipe segments, and complete the assembly of the upper pressure ring, lower pull ring, and second strut. Among them, when assembling the sealing pipe segments, the spatial coordinates of the center of the second ear plate pin hole are measured to locate the sealing pipe segments. When assembling the lower pull ring, the spatial coordinates of the center of the third ear plate pin hole are measured to locate the lower pull ring. S3, Assemble the first bracket. First, adjust the position of the first bracket so that the top wall of the first bracket is parallel to the horizontal plane. Then, adjust the position of the first bracket again so that the distance deviation between the geometric center of the top wall of the first bracket and the center of the second ear plate pin hole is ≤1mm. S4, Assemble the second bracket. First, complete the pin connection between the second bracket and the second ear plate, and then adjust the position of the second bracket so that the second bracket is perpendicular to the first bracket. S5, complete the assembly of the diamond grid; S6, completes the assembly of the cable system; S7, Assemble the first ear plate and adjust its position so that the center surfaces of the two side walls of the first ear plate are aligned with the center line of the cable; S8, Weld the first ear plate; S9, Assemble the first support rod, adjust the angle of the first support rod so that the first support rod is perpendicular to the horizontal plane, and spot weld the second connecting plate between the first support rod and the cable clamp to temporarily fix the first support rod and the cable clamp; S10 completes the tensioning of the cable.

2. The assembly method for a tensioned grid inner roof according to claim 1, characterized in that, In step S1, during the prefabrication of the cable system, the cable is first tensioned to make the cable force value greater than the design cable force value and not less than 50% of the nominal breaking force value of the cable. Then the cable is tensioned a second time to make the cable force value equal to the design cable force value, and the position of the cable clamp on the cable is marked.

3. The assembly method for a tensioned grid inner roof according to claim 1, characterized in that, In step S1, the number of sealing pipe segments is the same as the number of chord segments.

4. The assembly method for a tensioned grid inner roof according to claim 1, characterized in that, In step S4, after the second bracket is assembled, a first connecting plate is spot-welded between the second bracket and the second ear plate to temporarily fix the second bracket and the second ear plate.

5. The method for assembling a tensioned grid inner roof according to claim 1, characterized in that, In step S6, when assembling the cable system, tension the cables so that the cable force is ≤0.5KN.

6. The assembly method for a tensioned grid inner roof according to claim 1, characterized in that, In step S5, after the diamond grid is assembled, the inner chord and outer sealing tube are welded simultaneously, then the first bracket and the inner chord are welded, then the second bracket and the first bracket are welded, then the upper pressure ring and the lower pull ring are welded simultaneously, and finally the diamond grid is welded.

7. The method for assembling a tensioned grid inner roof according to claim 1, characterized in that, In step S9, one side of the second connecting plate is smoothly connected to the outer wall of the cable clamp, and the other side is smoothly connected to the outer wall of the first support rod.

8. The method for assembling a tensioned grid inner roof according to claim 7, characterized in that, In step S9, the side of the second connecting plate, the outer wall of the cable clamp, and the outer wall of the first strut together form a triangular structure.

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