Large-span cantilevered tensile-resistant counterweight roof structure and its construction method

Abstract

The present invention relates to a large-span cantilevered tensile-resistant counterweight roof structure and a construction method thereof, the method comprising: installing a counterweight beam and a counterweight column on a secondary roofing layer, and realizing horizontal limit connection of the counterweight column through a temporary connection structure; arranging a temporary support structure on the lower structure to support the cantilevered end of the counterweight beam; fixing the outer ring beam to the cantilevered end of the counterweight beam; vertically connecting the cable between the lower structure and the outer ring beam, tensioning the cable when connecting the cable, and then fixing the cable to the corresponding outer ring beam after tensioning; fixing the counterweight column to the secondary roofing layer, and removing the temporary connection structure and the temporary support structure, thereby completing the construction of the counterweight roof structure. The present invention uses the cable to form a tensile force transmission structure on the periphery of the counterweight roof structure, thereby improving the safety and stability of the cantilevered part. During the installation process, the horizontal limit connection of the counterweight column can avoid the stress accumulation of the overall deformation of the roof caused by the tensioning of the cable.

Description

Technical Field

[0001] The invention relates to the field of building construction engineering, and in particular to a large-span cantilevered tensile-resistant counterweight roof structure and a construction method thereof. Background Art

[0002] The construction of steel structure roof is mostly installed step by step from bottom to top, with the entire roof structure supported by structural columns, and the force of the roof structure is transmitted downward to the main body of the building by structural columns. For roof structures that need to set up cantilevered parts, in order to improve the stability of the roof structure, the counterweight in the middle area of ​​the roof structure should be increased to make the middle area have a higher tensile strength to support the outer cantilevered parts. In this way, the amount of steel used in the middle area will increase, thereby increasing the construction cost. Since the cantilevered parts are only supported and connected by the middle area, if the welding points break due to force, the cantilevered parts will fall, posing certain safety hazards. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a large-span cantilevered tensile-resistant counterweight roof structure and a construction method thereof, so as to solve the problems of the existing steel structure roof that the increase in steel consumption due to the addition of counterweights leads to increased costs and the cantilevered part is prone to falling and poses a safety hazard.

[0004] The technical solution to achieve the above purpose is:

[0005] The present invention provides a construction method for a large-span cantilevered tensile-resistant counterweight roof structure, comprising the following steps:

[0006] After the construction of the secondary roof layer is completed, a counterweight beam and a counterweight column are provided, and the counterweight beam and the counterweight column are installed on the secondary roof layer, and the counterweight column and the secondary roof layer are horizontally limitedly connected through a temporary connection structure, and one end of the counterweight beam is fixedly connected to the corresponding counterweight column, and the other end is extended outward to form a cantilever end;

[0007] A temporary support structure is provided on the lower structure corresponding to the cantilevered end, and the cantilevered end is supported by the temporary support structure;

[0008] Providing an outer ring beam, fixing the outer ring beam to the cantilevered end of the counterweight beam, connecting the counterweight beams together through the outer ring beam, connecting the outer ring beams end to end to form a closed ring structure, and supporting the outer ring beam through a temporary support structure;

[0009] Providing cables, arranging the cables at intervals along the annular structure, and vertically connecting the cables between the lower structure and the outer ring beam, tensioning the cables when connecting them, and then fixing the cables to the corresponding outer ring beams after tensioning; and

[0010] The counterweight column is fixedly connected to the secondary roof layer, and the temporary connection structure and the temporary support structure are removed, thereby completing the construction of the counterweight roof structure.

[0011] The counterweight roof structure of the present invention is designed with cables at the cantilevered part, and the cables are used to form a tensile force transmission structure on the periphery of the counterweight roof structure, thereby improving the safety and stability of the cantilevered part. During the installation process, the counterweight column is first aligned in place, and its horizontal displacement is limited by a temporary connection structure, without limiting the vertical position of the counterweight column, which can avoid the stress accumulation of the overall deformation of the roof caused by the tensioning of the cable. After the cable is installed, the counterweight column and the secondary roof layer are fixedly connected, and the secondary roof layer is used as an integral counterweight, which can reduce the amount of steel used in the counterweight roof structure, thereby reducing the construction cost.

[0012] A further improvement of the construction method of the large-span cantilevered tensile-resistant counterweight roof structure of the present invention is that it also includes:

[0013] A partition is arranged in the counterweight beam, and the partition is arranged above the edge of the secondary roof layer. The interior of the counterweight beam is divided into a first closed space and a second closed space by the partition. The first closed space is located above the secondary roof layer, and the second closed space is located outside the secondary roof layer.

[0014] Concrete is poured into the first enclosed space to form a concrete structure.

[0015] A further improvement of the construction method of the large-span cantilevered tensile-resistant counterweight roof structure of the present invention is that, when installing the counterweight beam and the counterweight column, it also includes:

[0016] Providing a counterweight plate, the counterweight plate provided with a column connection end and a beam connection end, the counterweight plate is supported and connected to the counterweight column through the column connection end;

[0017] When installing the counterweight beam, the end of the counterweight beam is connected to the beam connecting end.

[0018] A further improvement of the construction method of the large-span cantilevered tensile-resistant counterweight roof structure of the present invention is that, after the cables are installed, a support column is provided, the bottom of the support column is supported on the lower structure, and the top of the support column is fixedly connected to the corresponding part of the outer ring beam.

[0019] A further improvement of the construction method of the large-span cantilevered tensile-resistant counterweight roof structure of the present invention is that it also includes:

[0020] Providing an inner ring beam, supporting and connecting the inner ring beam between the counterweight beams, and the setting position of the inner ring beam corresponds to the position of the edge of the secondary roof layer, and the inner ring beam is enclosed to form a closed structure;

[0021] A structural column is provided, and the structural column is supported and connected between the inner ring beam and the secondary roof layer.

[0022] The present invention also provides a large-span cantilevered tensile-resistant counterweight roof structure, which is arranged on the secondary roof layer. The counterweight roof structure comprises:

[0023] A counterweight column is arranged on the secondary roof layer, wherein the counterweight column and the secondary roof layer are horizontally limitedly connected via a temporary connection structure;

[0024] A counterweight beam having one end fixedly connected to the counterweight column and the other end extending outward to form a cantilevered end;

[0025] An outer ring beam connected to the cantilevered end of the counterweight beam, through which the counterweight beams are connected together, and the outer ring beams are connected end to end to form a closed ring structure;

[0026] a temporary support structure supported on a lower structure corresponding to the cantilever end, the outer ring beam and the cantilever end being supported by the temporary support structure; and

[0027] A cable is vertically connected between the lower structure and the outer ring beam, the cable is arranged at intervals along the annular structure, and the cable is fixedly connected to the corresponding outer ring beam after being tensioned. After the cable is installed, the counterweight column is fixedly connected to the secondary roof layer and the temporary connection structure and the temporary support structure are removed.

[0028] A further improvement of the large-span cantilevered tensile-resistant counterweight roof structure of the present invention is that a partition is provided inside the counterweight beam, and the partition is used to separate the inside of the counterweight beam into a first closed space and a second closed space, wherein the first closed space is located above the secondary roof layer, and the second closed space is located outside the secondary roof layer;

[0029] A concrete structure is poured into the first enclosed space.

[0030] A further improvement of the large-span cantilevered tensile-resistant counterweight roof structure of the present invention is that it also includes a counterweight plate, on which a column connecting end and a beam connecting end are provided, and the column connecting end is supported and connected to the counterweight column;

[0031] The counterweight beam is fixedly connected to the beam connecting end.

[0032] A further improvement of the large-span cantilevered tensile-resistant counterweight roof structure of the present invention is that it also includes support columns connected between the lower structure and the outer ring beam.

[0033] A further improvement of the large-span cantilevered tensile-resistant counterweight roof structure of the present invention is that it further comprises an inner ring beam supported and connected between the counterweight beams and a structural column supported and connected between the inner ring beam and the secondary roof;

[0034] The setting position of the inner ring beam corresponds to the position of the edge of the secondary roof, and the inner ring beam is enclosed to form a closed structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the large-span cantilevered tensile-resistant counterweight roof structure of the present invention installed on the main body of the building.

[0036] Figure 2 It is a top view of the large-span cantilevered tensile-resistant counterweight roof structure of the present invention.

[0037] Figure 3 It is a top view of the counterweight plate in the large-span cantilevered tensile-resistant counterweight roof structure of the present invention.

[0038] Figure 4 It is a side sectional view of the counterweight plate in the large-span cantilevered tensile-resistant counterweight roof structure of the present invention.

[0039] Figure 5 The present invention is a flow chart of the construction method of the large-span cantilevered tensile-resistant counterweight roof structure. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0041] See also Figure 1 The present invention provides a large-span cantilevered tensile-resistant counterweight roof structure and a construction method thereof. Cables are arranged on the periphery of the counterweight roof structure, and the cables are used to form a tensile force transmission form to achieve the installation of the cable-type external curtain wall structure system, greatly improving the safety. At the same time, the secondary roof layer is used as the overall counterweight, thereby reducing the steel consumption of the roof layer and the construction energy consumption. The large-span cantilevered tensile-resistant counterweight roof structure and the construction method thereof of the present invention are described below in conjunction with the accompanying drawings.

[0042] See also Figure 1 , showing a schematic diagram of the structure of the large-span cantilevered tensile-resistant counterweight roof structure of the present invention installed on the main building. Figure 2 , showing a top view of the large-span cantilevered tensile-resistant counterweight roof structure of the present invention. Figure 1 and Figure 2 , the large-span cantilevered tensile-resistant counterweight roof structure of the present invention is described.

[0043] like Figure 1 and Figure 2 As shown, the large-span cantilevered tensile-resistant counterweight roof structure 20 of the present invention is arranged on the secondary roof layer 11, and the counterweight roof structure 20 includes a counterweight column 21, a counterweight beam 22, an outer ring beam 23, a temporary support structure and a cable, wherein the counterweight column 21 is arranged on the secondary roof layer 11, and the counterweight column 21 and the secondary roof layer 11 are horizontally limitedly connected by a temporary connection structure, that is, the counterweight column 21 cannot be displaced in the horizontal direction, but can be displaced in the vertical direction. One end of the counterweight beam 22 is fixedly connected to the counterweight column 21, and the other end of the counterweight beam 22 extends outward to form a cantilever end 221, and the cantilever end 221 is located outside the secondary roof layer 11. Outer ring beam 23 is connected to the cantilever end 221 of counterweight beam 22, counterweight beam 22 is connected together by outer ring beam 23, outer ring beam 23 is connected end to end to form a closed ring structure, outer ring beam 23 has multiple, is located at the outer edge of counterweight roof structure 20, counterweight roof structure 20 is formed by outer ring beam 23. When outer ring beam 23 is set, a temporary support structure is set on the lower structure 12 of corresponding cantilever end 221, and the temporary support structure is utilized to support outer ring beam 23 and cantilever end 221, because the horizontal limit connection is realized between counterweight column 21 and secondary roofing layer 11 by temporary connection structure, the stability of this connection is not enough, so this counterweight column 21 cannot provide firm and stable supporting force for counterweight beam 22 and outer ring beam 23, for improving the safety and stability of installation process, adopting to set temporary support structure on lower structure 12 to support cantilever end 221 and outer ring beam 23. The cables are vertically connected between the lower structure 12 and the outer ring beam 23. The cables are arranged at intervals along the annular structure. After being tensioned, the cables are fixedly connected to the corresponding outer ring beam 23. After the cables are installed, the counterweight column 21 is fixedly connected to the secondary roof layer 11 and the temporary connection structure and the temporary support structure are removed.

[0044] The counterweight column of the present invention is connected to the secondary roof layer by a temporary connection structure at the beginning of installation, that is, the horizontal displacement of the counterweight column is limited by the temporary connection structure, but the vertical displacement of the counterweight column is not limited. The counterweight column is first aligned in place, but not fixedly connected, so that when the cable is installed and tensioned, the structural deformation of the counterweight roof structure can be avoided, and the overall deformation stress accumulation of the roof is avoided when the edge cable is tensioned. After the cable is installed, the counterweight column is fixedly connected to the secondary roof layer, and the overall counterweight is strengthened with the help of the secondary roof layer, thereby reducing the steel consumption of the counterweight roof structure and saving construction costs.

[0045] In a specific embodiment of the present invention, a partition is provided inside the counterweight beam 22, and a first enclosed space and a second enclosed space are formed by dividing the interior of the counterweight beam 22 through the partition, wherein the first enclosed space is located above the secondary roof layer 11, and the second enclosed space is located outside the secondary roof layer 11, that is, the second enclosed space corresponds to the cantilevered portion of the counterweight beam 22, and a concrete structure is poured in the first enclosed space.

[0046] A grouting port is reserved on the counterweight beam 22. After the outer ring beam 23 is installed, fine stone concrete is poured into the grouting port to form a concrete structure in the first closed space. The concrete structure is arranged in the counterweight beam 22 to form a steel-concrete structure, thereby increasing the counterweight of the counterweight beam 22 and improving the overall stability of the counterweight roof structure.

[0047] In a specific embodiment of the present invention, Figures 2 to 4 As shown, the counterweight roof structure 20 of the present invention further includes a counterweight plate 24, on which a column connection end 241 and a beam connection end 242 are provided. Figure 1 As shown, the column connecting end 241 is supported and connected to the counterweight column 21 , and the counterweight beam 22 is fixedly connected to the beam connecting end 242 .

[0048] Preferably, there are multiple beam connection ends 242 on the counterweight plate 24, which are arranged at intervals along the outer periphery of the counterweight plate 24, and the counterweight plate forms a symmetrical structure, so that the entire counterweight roof structure as a whole forms a structural system that is symmetrical as a whole with the counterweight plate as a local core, thereby improving its stability. The counterweight plate 24 also includes a columnar body, the outer periphery of which is fixedly connected to multiple beam connection ends 242, and the bottom of the columnar body is fixedly connected to a column connection end 241, the shape and size of the column connection end 241 are adapted to the shape and size of the counterweight column 21, and the shape and size of the beam connection end 242 are adapted to the shape and size of the counterweight beam 22. When installing the counterweight plate 24, first put the counterweight column 21 in place and align it, so that the counterweight column 21 can be horizontally limited and connected to the column foot on the secondary roof layer 11 through a temporary connection structure, and then the counterweight plate 24 is installed on the counterweight column 21. The column connecting end 241 of the counterweight plate 24 is fixedly connected to the counterweight column 21 through a connecting ear plate 2411 set at the bottom. After the counterweight plate 24 is installed and fixed, the counterweight beam 22 is connected to the beam connecting end 242 of the counterweight plate 24, thereby forming a counterweight roof structure.

[0049] In a specific embodiment of the present invention, the temporary connection structure includes a first limiting ear plate fixedly connected to the secondary roof layer 11 and a second limiting ear plate fixedly connected to the counterweight column 21 and arranged corresponding to the first limiting ear plate, and the first limiting ear plate and the second limiting ear plate are correspondingly provided with vertical adjustment holes, and the first limiting ear plate and the second limiting ear plate are attached to each other and connected by a connector penetrating the vertical adjustment hole, and the connector can be moved up and down in the vertical adjustment hole to achieve a horizontal limiting connection. There are multiple first limiting ear plates and second limiting ear plates, and the first limiting ear plates are arranged at intervals on the outer periphery of the column foot of the secondary roof layer, and the second limiting ear plates are arranged on the outer periphery of the bottom of the counterweight column 21. The first limiting ear plate and the second limiting ear plate are used to limit the horizontal displacement of the counterweight column 21, but the vertical displacement of the counterweight column 21 is not limited.

[0050] In a specific embodiment of the present invention, Figure 1 and Figure 2 As shown, the counterweight roof structure 20 also includes an inner ring beam 26 supported and connected between the counterweight beams 22 and a structural column 252 supported and connected between the inner ring beam 26 and the secondary roofing layer 11, the setting position of the inner ring beam 26 corresponds to the position of the edge of the secondary roofing layer 11, and the inner ring beam 26 encloses a closed structure. The area enclosed by the inner ring beam 26 is the counterweight area, and the shape and size of the counterweight area are adapted to the shape and size of the secondary roofing layer 11, the outer side of the inner ring beam 26 and the inner side of the outer ring beam 23 are the cantilever area, and a stable and reliable counterweight core is realized by arranging a counterweight plate 24, a counterweight beam 22 and a counterweight column 21 in the counterweight area, and the setting of the inner ring beam 26 connects the counterweight beam 22 into a whole, improves the overall stability of the counterweight core, can provide reliable support for the cantilever area, and improves the safety and stability of the counterweight roof structure.

[0051] When installing the inner ring beam 26, first temporarily fix the structural column 252 to limit the displacement of the structural column 252 in the horizontal direction, but not in the vertical direction. After the cable installation is completed, fix the structural column 252.

[0052] In a specific embodiment of the present invention, Figure 1 As shown, the counterweight roof structure 20 further includes a support column 251 that is supported and connected between the lower structure 12 and the outer ring beam 23 .

[0053] The ring structure formed by connecting the outer ring beam 23 is a hexagon, which includes three long sides and three short sides. The support column 251 is supported at the three short sides. The lower structure 12 is a structural beam of the corresponding floor of the building body, and the support column 251 is supported on the structural beam. Preferably, the support column 251 is set after the cable is installed.

[0054] In a specific embodiment of the present invention, when installing the outer ring beam 23, a diagonal bracing beam 27 is arranged between the outer ring beam 23 and the counterweight beam 22, and the diagonal bracing beam 27 is diagonally supported and connected between the outer ring beam and the counterweight beam 22. The structural stability of the outer ring beam 23 and the counterweight beam 22 is improved by the diagonal bracing beam 27, and the integrity of the counterweight roof structure 20 is also improved.

[0055] Further, after the inner ring beam 26 is installed, a connecting beam 28 is provided between the inner ring beam 27 and the outer ring beam 23 , and the connecting beam 28 supports and connects between the outer ring beam 23 and the inner ring beam 27 .

[0056] There are multiple counterweight columns 21, one of which is located in the middle of the secondary roof layer 11, and the remaining counterweight columns 21 are arranged at intervals along the edge of the secondary roof layer 11, and the multiple counterweight columns 21 are connected together by counterweight beams 22. Figure 2 As shown, there are four counterweight plates 24, one counterweight plate 24 is located in the middle of the counterweight area, and the other three counterweight plates 24 are arranged near the three short sides of the counterweight area. The counterweight beams 22 on the counterweight plates 24 are arranged in a scattered manner, and the counterweight beams 22 are supported and connected between the corresponding counterweight plates 24, and are also supported and connected between the counterweight plates 24 and the inner ring beam 26, and are also supported and connected between the counterweight plates 24 and the outer ring beam 23.

[0057] During the installation process of the counterweight roof structure of the present invention, the counterweight plate and counterweight column located in the middle are taken as the center and installed symmetrically from the center to the edge. According to the structural tension and counterweight calculation, the internal counterweight and the external facade cable loading are carried out in stages and in batches.

[0058] A plurality of ear plate connectors 231 are arranged on the outer side of the outer ring beam. The ear plate connectors 231 are used to connect the cables. The ear plate connectors 231 serve as tensioning points of the cables and tension bearing ends of the roof.

[0059] Through the steel structure's own counterweight, a centrally symmetrical steel counterweight plate structure is set in the core area of ​​the roof plane, so that the entire roof forms a structural system with the counterweight plate as the local core and an overall symmetrical structure, which is convenient for connection with the secondary roof layer.

[0060] The counterweight column at the bottom of the counterweight plate connects the counterweight roof structure with the secondary roof layer, and uses the secondary roof layer to strengthen the overall counterweight. The column is aligned during construction and fixed by a temporary connection structure to limit the horizontal displacement of the counterweight column, but not the vertical displacement of the counterweight column, to avoid the accumulation of overall deformation stress of the roof when the edge cable is tensioned. After the tension of the roof edge cable is loaded in place and the deformation is stable, the counterweight column and the column foot of the secondary roof layer are welded and connected, and the limit ear plate is removed after welding.

[0061] The present invention also provides a construction method for a large-span cantilevered tensile-resistant counterweight roof structure, which is described below.

[0062] like Figure 5 As shown, the construction method of the present invention comprises the following steps:

[0063] Execute step S101, after the construction of the secondary roof layer is completed, provide a counterweight beam and a counterweight column, install the counterweight beam and the counterweight column on the secondary roof layer, connect the counterweight column and the secondary roof layer horizontally through a temporary connection structure, and fix one end of the counterweight beam to the corresponding counterweight column, and extend the other end outward to form a cantilever end; the connection between the counterweight beam and the counterweight column forms a supporting skeleton of the counterweight roof structure; then execute step S102;

[0064] Execute step S102, set a temporary support structure on the lower structure corresponding to the cantilever end, and support the cantilever end by the temporary support structure; then execute step S103;

[0065] Execute step S103, provide an outer ring beam, fix the outer ring beam to the cantilever end of the counterweight beam, connect the counterweight beams together through the outer ring beam, connect the outer ring beams end to end to form a closed ring structure and support the outer ring beam through a temporary support structure; then execute step S104;

[0066] Execute step S104, provide cables, arrange the cables at intervals along the annular structure, and vertically connect the cables between the lower structure and the outer ring beam, tension the cables when connecting them, and then fix the cables to the corresponding outer ring beam after tensioning; then execute step S105;

[0067] Step S105 is executed to fix the counterweight column to the secondary roof layer, and to remove the temporary connection structure and the temporary support structure, thereby completing the construction of the counterweight roof structure.

[0068] In a specific embodiment of the present invention, the construction method of the present invention further comprises:

[0069] A partition is arranged in the counterweight beam, and the partition is arranged above the edge of the secondary roof layer. The interior of the counterweight beam is divided into a first closed space and a second closed space by the partition. The first closed space is located above the secondary roof layer, and the second closed space is located outside the secondary roof layer.

[0070] Concrete is poured into the first closed space to form a concrete structure.

[0071] Concrete is poured into the counterweight beam to form a steel-concrete structure, which increases the counterweight of the counterweight beam and thus improves the overall stability of the counterweight roof structure.

[0072] In a specific embodiment of the present invention, when installing the counterweight beam and the counterweight column, it also includes:

[0073] Providing a counterweight plate, the counterweight plate provided with a column connection end and a beam connection end, the counterweight plate is supported and connected to the counterweight column through the column connection end;

[0074] When installing the counterweight beam, connect the end of the counterweight beam to the beam connecting end.

[0075] Combine 2 to Figure 4 As shown, when installing the counterweight beam through the counterweight plate, the counterweight beam is installed symmetrically, and there are also multiple counterweight plates. When installing the counterweight plate, it is installed symmetrically from the center to the edge. The counterweight plate forms a symmetrical structure, so that the entire counterweight roof structure forms a structural system with the counterweight plate as the local core and the overall symmetry, thereby improving its stability.

[0076] In a specific embodiment of the present invention, after the cable is installed, a support column is provided, the bottom of the support column is supported on the lower structure, and the top of the support column is fixedly connected to the corresponding part of the outer ring beam. Figure 1 As shown, the support column 251 is supported and connected between the lower structure and the outer ring beam 23. The outer ring beam 23 is in a hexagonal shape, including three long sides and three short sides. The short sides are connected between the long sides, and the support column 251 is set at the position corresponding to the short side.

[0077] In a specific embodiment of the present invention, the construction method of the present invention further comprises:

[0078] Providing an inner ring beam, supporting and connecting the inner ring beam between the counterweight beams, and the setting position of the inner ring beam corresponds to the position of the edge of the secondary roof layer, and the inner ring beam is enclosed to form a closed structure;

[0079] Structural columns are provided and structural column braces are connected between the inner ring beam and the secondary roof layer.

[0080] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A construction method for a large-span cantilevered tensile-resistant counterweight roof structure, characterized in that: The steps include: After the construction of the secondary roof layer is completed, a counterweight beam and a counterweight column are provided, and the counterweight beam and the counterweight column are installed on the secondary roof layer, and the counterweight column and the secondary roof layer are horizontally limitedly connected through a temporary connection structure, and one end of the counterweight beam is fixedly connected to the corresponding counterweight column, and the other end is extended outward to form a cantilever end; A temporary support structure is provided on the lower structure corresponding to the cantilevered end, and the cantilevered end is supported by the temporary support structure; Providing an outer ring beam, fixing the outer ring beam to the cantilevered end of the counterweight beam, connecting the counterweight beams together through the outer ring beam, connecting the outer ring beams end to end to form a closed ring structure, and supporting the outer ring beam through a temporary support structure; Providing cables, arranging the cables at intervals along the annular structure, and vertically connecting the cables between the lower structure and the outer ring beam, tensioning the cables when connecting them, and then fixing the cables to the corresponding outer ring beams after tensioning; and The counterweight column is fixedly connected to the secondary roof layer, and the temporary connection structure and the temporary support structure are removed, thereby completing the construction of the counterweight roof structure.

2. The construction method of the large-span cantilevered tensile-resistant counterweight roof structure according to claim 1, characterized in that: Also includes: A partition is arranged in the counterweight beam, and the partition is arranged above the edge of the secondary roof layer. The interior of the counterweight beam is divided into a first closed space and a second closed space by the partition. The first closed space is located above the secondary roof layer, and the second closed space is located outside the secondary roof layer. Concrete is poured into the first enclosed space to form a concrete structure.

3. The construction method of the large-span cantilevered tensile-resistant counterweight roof structure according to claim 1, characterized in that: When installing the counterweight beam and counterweight column, it also includes: Providing a counterweight plate, the counterweight plate provided with a column connection end and a beam connection end, the counterweight plate is supported and connected to the counterweight column through the column connection end; When installing the counterweight beam, the end of the counterweight beam is connected to the beam connecting end.

4. The construction method of the large-span cantilevered tensile-resistant counterweight roof structure according to claim 1, characterized in that: After the cable is installed, a support column is provided, the bottom of the support column is supported on the lower structure, and the top of the support column is fixedly connected to the corresponding part of the outer ring beam.

5. The construction method of the large-span cantilevered tensile-resistant counterweight roof structure according to claim 1, characterized in that: Also includes: Providing an inner ring beam, supporting and connecting the inner ring beam between the counterweight beams, and the setting position of the inner ring beam corresponds to the position of the edge of the secondary roof layer, and the inner ring beam is enclosed to form a closed structure; A structural column is provided, and the structural column is supported and connected between the inner ring beam and the secondary roof layer.

6. A large-span cantilevered tensile-resistant counterweight roof structure, arranged on the secondary roof layer, characterized in that: The counterweight roof structure comprises: A counterweight column is arranged on the secondary roof layer, wherein the counterweight column and the secondary roof layer are horizontally limitedly connected via a temporary connection structure; A counterweight beam having one end fixedly connected to the counterweight column and the other end extending outward to form a cantilevered end; An outer ring beam connected to the cantilevered end of the counterweight beam, through which the counterweight beams are connected together, and the outer ring beams are connected end to end to form a closed ring structure; a temporary support structure supported on a lower structure corresponding to the cantilever end, the outer ring beam and the cantilever end being supported by the temporary support structure; and A cable vertically connected between the lower structure and the outer ring beam, the cable being arranged at intervals along the annular structure, the cable being fixedly connected to the corresponding outer ring beam after being tensioned, and after the cable is installed, the counterweight column is fixedly connected to the secondary roof layer and the temporary connection structure and the temporary support structure are removed; A partition is provided inside the counterweight beam, and a first closed space and a second closed space are formed by dividing the counterweight beam inside with the partition, wherein the first closed space is located above the secondary roof layer, and the second closed space is located outside the secondary roof layer; A concrete structure is poured into the first enclosed space; It also includes a counterweight plate, on which a column connection end and a beam connection end are provided, and the column connection end is supported and connected to the counterweight column; The counterweight beam is fixedly connected to the beam connecting end.

7. The large-span cantilevered tensile-resistant counterweight roof structure according to claim 6, characterized in that: It also includes a support column that is connected between the lower structure and the outer ring beam.

8. The large-span cantilevered tensile-resistant counterweight roof structure according to claim 6, characterized in that: It also includes an inner ring beam supported and connected between the counterweight beams and a structural column supported and connected between the inner ring beam and the secondary roof; The setting position of the inner ring beam corresponds to the position of the edge of the secondary roof, and the inner ring beam is enclosed to form a closed structure.

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