Simple support for multilayer cable tower beam construction of super-large bridge

Abstract

The utility model relates to the technical field of suspension bridge construction support, and specifically discloses a simple support for multilayer cable tower beam construction of super large bridge, which comprises a first pull rod, a second pull rod, a center block, an upper chord rod assembly, an upper chord node hinged plate shaft a, an upper chord node hinged plate shaft b, a support rod assembly and a lower cross beam. The first pull rod and the second pull rod are hingedly connected to the two sides of the center block at the bottom ends, and the first pull rod and the second pull rod are used as the starting point to sequentially hinge the upper chord rod four, the upper chord rod three, the upper chord rod two and the upper chord rod one. Each hinged point between the upper chord rod one, the upper chord rod two, the upper chord rod three and the upper chord rod four is provided with the upper chord node hinged plate shaft a and the upper chord node hinged plate shaft b. The top ends of the first pull rod and the second pull rod are hingedly connected with the upper chord node hinged plate shaft b. The simple support can be disassembled and reused, and can be used for the upper cross beam after the lower cross beam is constructed and disassembled.

Description

Technical Field

[0001] This utility model relates to the field of suspension bridge construction support technology, specifically a simple support for the construction of multi-layer cable tower crossbeams of extra-large bridges. Background Technology

[0002] In modern bridge construction, the quality and efficiency of pylon and crossbeam construction are crucial to the overall safety and stability of the bridge. However, traditional construction scaffolding has significant drawbacks.

[0003] 1. Too many connection points between the support and the tower column, and too many welding points on the support itself, not only make the process complicated and the quality difficult to control, but also easily cause safety hazards due to welding defects. Dismantling requires cutting, which consumes a lot of resources, and damages the support, making it impossible to reuse and increasing construction costs.

[0004] 2. Some supports lack flexibility and need to be erected at height, which makes construction difficult and inefficient. Due to the limitations of the high-altitude working environment, accidents are prone to occur, affecting progress and safety.

[0005] The purpose of this utility model is to provide a simple support for the construction of multi-layer cable tower crossbeams of extra-large bridges, so as to solve the problems mentioned in the background art. Utility Model Content

[0006] To achieve the above objectives, this utility model provides a simple support for the construction of multi-layer cable tower crossbeams of extra-large bridges, including a first tie rod, a second tie rod, and a central block, as well as embedded parts; the embedded parts are set on the inner walls of opposite sides of the tower columns;

[0007] The upper chord assembly includes upper chord one, upper chord two, upper chord three, and upper chord four. The bottom ends of the first and second tie rods are hinged to both sides of the central block. Starting from the first and second tie rods, upper chord four, upper chord three, and upper chord two are sequentially hinged. Upper chord one is set between the two upper chord twos. The tops of upper chord four, upper chord three, upper chord two, and upper chord one are used to lay the formwork support beam and the bottom plate formwork. The first and second tie rods are detachably connected to the embedded parts.

[0008] The strut assembly includes strut 1, strut 2, and strut 3; strut 1, strut 2, and strut 3 are sequentially connected to each hinge point starting from both sides of the upper chord strut 1, and the bottom ends of strut 1, strut 2, and strut 3 are detachably connected to the center block.

[0009] Upper chord node hinge plate shaft a; each hinge point between upper chord one, upper chord two, upper chord three and upper chord four is provided with upper chord node hinge plate shaft a, and the outer walls on both sides of upper chord node hinge plate shaft a are also connected with node connecting plate one, and node connecting plate one is also connected to the top of the adjacent upper chord assembly and the strut assembly.

[0010] The upper chord node hinge plate shaft b; the top of the first tie rod and the second tie rod are both hinged to the upper chord node hinge plate shaft b, the upper chord node hinge plate shaft b is also connected to the fulcrum shaft, the fulcrum shaft is hinged to the embedded part, the upper chord node hinge plate shaft b is also connected to the node connecting plate two, the node connecting plate two is also connected to the first tie rod or the second tie rod and the upper chord four respectively.

[0011] As a further improvement of this utility model, the first tie rod and the second tie rod respectively include a tie plate a and a tie plate one. A hinge plate c is welded to the top of both tie plate a and tie plate one. The hinge plate c is bolted to the node connecting plate two. A tie plate two is also welded to the bottom of tie plate one. The bottom end of tie plate two is detachably connected to the center block, which facilitates installation and disassembly and improves construction efficiency.

[0012] As a further improvement of this utility model, the central block includes a sector block and a central shaft. The central shaft is installed at the center of the bottom end of the sector block. The tie rod a and the tie plate two are provided with multiple pin holes that match the central shaft. The bottom ends of the tie plate a and the tie plate two are hinged to the central shaft through the pin holes. This structural design gives the central block the role of a connecting hub in the bracket. The pin hole connection method is not only stable, but also allows for flexible adjustment of the angle to adapt to different construction needs.

[0013] As a further improvement of this utility model, multiple connecting blocks 1, 2 and 3 are evenly distributed at the top of the fan-shaped block, and each connecting block 1, 2 and 3 has a strut connecting plate welded to both ends. The bottom of strut 1, 2 and 3 has a strut connecting plate welded to it. This design achieves a stable connection between the strut assembly and the central block. The detachable design makes it easy to adjust the strut layout according to the stress conditions at different construction stages, thereby enhancing the adaptability of the support.

[0014] As a further improvement of this utility model, strut 1, strut 2 and strut 3 all include a structural profile c and a hinge plate c. The hinge plate c is welded to the top of the structural profile c. The end of the hinge plate c is provided with an arc-shaped end face that fits against the arc surface of the hinge shaft plate a to form a hinge structure with a large contact surface. This design ensures the strength of the strut, and the bolt connection facilitates installation and replacement. The strut assembly can be quickly assembled and adjusted during construction.

[0015] As a further improvement of this utility model, the upper chord node hinge plate a includes a hinge shaft plate a and a hinge shaft connecting cylinder a. The hinge shaft plate a is welded to both ends of the hinge shaft connecting cylinder a, and the hinge shaft plate a has a threaded hole in the center. The node connecting plate a is connected to the threaded hole by bolts. This structure ensures the stability of the hinge between the upper chord components, and at the same time facilitates assembly and disassembly.

[0016] As a further improvement of this utility model, the upper chord 1, upper chord 2, upper chord 3, and upper chord 4 all include a structural profile a and a hinge plate a. The hinge plate a is welded to both ends of the structural profile a. The ends of the structural profile a and the hinge plate a are provided with arc-shaped end faces that fit against the arc surface of the hinge plate a, so as to form a hinge structure with a large contact surface. The node connecting plate 1 is a triangular structure, and its three corner points are respectively bolted to the adjacent hinge plate a and the top of the support rod 1, support rod 2, or support rod 3. This design ensures the strength and stability of the upper chord assembly. By fixing the position through the hinge and the node connecting plate 1, the upper chord assembly and the support rod assembly work together to support the template beam and the bottom plate template.

[0017] As a further improvement of this utility model, the upper chord node hinge plate shaft b includes a hinge shaft plate b and a hinge shaft connecting cylinder b. The hinge shaft connecting cylinder b has hinge shaft plates b welded to both ends. A fulcrum shaft is inserted into the hinge shaft connecting cylinder b. The fulcrum shaft passes through the node connecting plate two and connects to the embedded part. The other two corners of the node connecting plate two are also hinged to the hinge plate c of the first tie rod or the second tie rod. This design ensures a stable connection between the first tie rod and the second tie rod and the embedded part and the upper chord four. When the support is under stress, it effectively transmits the load and ensures the overall stability of the support.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. The simple support of this utility model is simply installed on the inner side of the tower column. The load mainly generates axial force on the tower column, with small bending moment and small tower column deformation. Because it is a statically determinate structure, the stress is simple. There is no need to consider the influence of the tower column in the design. The calculation using the simple support mechanical model is simple and the results are reliable. The simple support can be disassembled and reused. The lower crossbeam can be easily disassembled for the upper crossbeam after construction. Moreover, there is no need to weld with the embedded parts. The installation and disassembly are convenient. It can be directly assembled between tower columns or assembled on the ground and then hoisted to the embedded parts of the tower column. It effectively improves construction efficiency, reduces difficulty and risk, reduces support wear and tear, realizes efficient use of resources, and has significant economic and social benefits.

[0020] Furthermore, during the construction of the lower crossbeam, the top of the upper chord assembly is hinged to the top of the strut assembly, the lower end of the strut assembly is bolted to the center block, and the first and second tie rods on both sides of the upper chord assembly are hinged to the center block. By replacing connecting block one or connecting block two, removing some struts and upper chords and replacing them with the first and second tie rods, and adjusting the connection method, it can be transformed into a simple support for the construction of the upper crossbeam. It is suitable for the construction of most large-tonnage cable tower crossbeams (with various curved surfaces on the bottom plate). The entire crossbeam support is composed of two or more simple support pieces.

[0021] 2. In this utility model, at both ends of the upper chord members 1, 2, 3, and 4, and at the upper ends of the support members 1, 2, and 3, respectively, reinforced hinge plates a and c are welded to enhance compressive strength. The pin holes at both ends of the upper chord members 1, 2, 3, and 4, and at the support members 1 or 2 and 3, as well as hinge plates a and c, are large-diameter semi-circular openings, connecting to the upper chord node hinge plate shaft a. The upper chord node hinge plate shaft a consists of a hinge shaft plate a and a hinge shaft connecting cylinder a. The thickness of the hinge shaft plate a is the sum of the thickness of the hinge plate a and the side wall thickness of the upper chord members. With its small diameter and thin walls, the connecting tube a has a simple hinge node structure, significantly reducing the weight of the rod end. Furthermore, the upper chords one to four and the struts one to three are under compression under load, not tension. Therefore, the hinge plate a does not need to be a closed ring. The pressure of each chord in the upper chord assembly is on the same plane. The hinge plate a of the upper chord node does not need to be sheared, but only bears the pressure of the upper chord assembly. Therefore, it does not need to be a continuous long diameter. The hinge plate a can achieve the function of a continuous shaft. At the two support points of the simple support, because the first and second tie rods and the embedded parts will generate shear force on the shaft, the hinge plate b of the upper chord node hinge plate b has a larger central opening to accommodate a larger diameter support shaft. This setting ensures the versatility of the chord end and meets the special requirements at the support point. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the application of the simple support of this utility model on the lower crossbeam of the cable tower;

[0023] Figure 2 This is a schematic diagram of the application of the simple support of this utility model on the crossbeam of a cable tower;

[0024] Figure 3 This is a schematic diagram of a single frame of the lower crossbeam support of the cable tower according to this utility model;

[0025] Figure 4 This is an exploded view of a single frame of the cable tower upper beam support according to this utility model;

[0026] Figure 5 This is an exploded view of the two outermost nodes of the plate holder of this utility model.

[0027] In the diagram: 1. First tie rod; 101. Tie plate a; 102. Hinge plate c; 2. Second tie rod; 201. Tie plate one; 202. Tie plate two; 3. Center block; 301. Sector block; 302. Central shaft; 303. Support rod connecting plate; 304. Connecting block one; 305. Connecting block two; 306. Connecting block three; 4. Upper chord one; 401. Structural profile a; 402. Hinge plate a; 5. Upper chord two; 6. Upper chord three; 7. Upper chord four; 8. Strut 1; 801. Structural Profile c; 9. Strut 2; 10. Strut 3; 11. Upper Chord Node Hinge Plate ab; 1101. Hinge Plate b; 1102. Hinge Connecting Cylinder b; 12. Upper Chord Node Hinge Plate a; 1201. Hinge Plate a; 1202. Hinge Connecting Cylinder a; 15. Node Connecting Plate 1; 16. Node Connecting Plate 2; 17. Support Shaft; 19. Formwork Support Beam; 20. Base Plate Formwork; 21. Embedded Parts; 22. Tower Column. Detailed Implementation

[0028] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] The present invention will be further described in detail below with reference to the accompanying drawings.

[0031] Please see Figure 1-5 This utility model provides a simple support for the construction of a multi-layer cable tower crossbeam of an extra-large bridge, including a first tie rod 1, a second tie rod 2 and a center block 3, and also includes an embedded part 21; the embedded part 21 is set on the inner wall of the opposite side of the tower column 22.

[0032] The upper chord assembly includes an upper chord 1 4, an upper chord 2 5, an upper chord 3 6, and an upper chord 4 7. The bottom ends of the first tie rod 1 and the second tie rod 2 are hinged to both sides of the center block 3. Starting from the top of the first tie rod 1 and the second tie rod 2, the upper chord 4 7, the upper chord 3 6, and the upper chord 2 5 are hinged in sequence. The upper chord 1 4 is set between the two upper chord 2 5. The top of the upper chord 4 7, the upper chord 3 6, the upper chord 2 5, and the upper chord 1 4 are used to lay the formwork support beam 19 and the bottom plate formwork 20. The first tie rod 1 and the second tie rod 2 are detachably connected to the embedded part 21.

[0033] The strut assembly includes strut 1 8, strut 2 9 and strut 3 10; strut 1 8, strut 2 9 and strut 3 10 are connected sequentially at each hinge point starting from both sides of the upper chord strut 1 4, and the bottom ends of strut 1 8, strut 2 9 and strut 3 10 are detachably connected to the center block 3.

[0034] The upper chord node hinge plate shaft a12; each hinge point between the upper chord 1 4, upper chord 2 5, upper chord 3 6 and upper chord 4 7 is provided with an upper chord node hinge plate shaft a12, and the outer walls on both sides of the upper chord node hinge plate shaft a12 are also connected with node connecting plates 15, and node connecting plates 15 are also connected to the top of the adjacent upper chord assembly and the support assembly.

[0035] The upper chord node hinge plate shaft b11; the top ends of the first tie rod 1 and the second tie rod 2 are both hinged to the upper chord node hinge plate shaft b11, the upper chord node hinge plate shaft b11 is also connected to the fulcrum shaft 17, the fulcrum shaft 17 is hinged to the embedded part 21, the upper chord node hinge plate shaft b11 is also connected to the node connecting plate 2 16, the node connecting plate 2 16 is also connected to the first tie rod 1 or the second tie rod 2 and the upper chord 4 7 respectively.

[0036] The first pull rod 1 and the second pull rod 2 respectively include a pull plate a101 and a pull plate 201. A hinge plate c102 is welded to the top of both pull plate a101 and pull plate 201. The hinge plate c102 is bolted to the node connecting plate 16. A pull plate 202 is also welded to the bottom of pull plate 201. The bottom end of pull plate 202 is detachably connected to the center block 3.

[0037] The central block 3 includes a sector block 301 and a central shaft 302. The central shaft 302 is installed at the center of the bottom end of the sector block 301. The pull rod a and the second pull plate 202 are provided with multiple pin holes that match the central shaft 302. The bottom ends of the pull plate a101 and the second pull plate 202 are hinged to the central shaft 302 through the pin holes.

[0038] The top of the fan-shaped block 301 is evenly distributed with multiple connecting blocks 1 304, 2 305 and 3 306, and each connecting block 1 304, 2 305 and 3 306 has a strut connecting plate welded to both ends. The bottom of strut 1 8, strut 2 9 and strut 3 10 has a strut connecting plate 303 welded to it.

[0039] During the construction of the lower crossbeam, strut 18 and strut 29 are bolted to sector block 301 through connecting block 2 305 and connecting block 3 306 respectively, and strut 310 is directly bolted to sector block 301.

[0040] During the construction of the upper crossbeam, strut 18 is bolted to sector block 301 via connecting block 1 304, strut 29 is directly bolted to sector block 301, strut 310 is no longer installed, and the two outermost strut connecting plates 303 of sector block 301 are cut off.

[0041] Support rod 1 (8), support rod 2 (9), and support rod 3 (10) all include structural profile c801 and hinge plate c102. The hinge plate c102 is welded to the top of the structural profile c801. The end of the hinge plate c102 is provided with an arc-shaped groove end face that fits with the arc surface of the hinge shaft plate a1201 to form a hinge structure with a large contact surface.

[0042] The upper chord node hinge plate a12 includes a hinge shaft plate a1201 and a hinge shaft connecting cylinder a1202. The hinge shaft plate a1201 is welded to both ends of the hinge shaft connecting cylinder a1202, and the hinge shaft plate a1201 has a threaded hole in the center. The node connecting plate 15 is connected to the threaded hole by bolts.

[0043] Upper chord 1 (4), upper chord 2 (5), upper chord 3 (6), and upper chord 4 (7) all include structural profile a401 and hinge plate a402. The hinge plate a402 is welded to both ends of the structural profile a401. The structural profile a401 and the hinge plate a402 are provided with arc-shaped end faces that fit with the arc surface of the hinge shaft plate a1201 to form a hinge structure with a large contact surface. The node connecting plate 15 is a triangular structure, and its three corner points are respectively bolted to the adjacent hinge plate a402 and the top of the strut 1 (8), strut 2 (9), or strut 3 (10) to ensure that the hinge node will not come apart.

[0044] The upper chord node hinge plate shaft b11 includes a hinge shaft plate b1101 and a hinge shaft connecting cylinder b1102. The hinge shaft connecting cylinder b1102 has hinge shaft plates b1101 welded to both ends. A fulcrum shaft 17 is inserted into the hinge shaft connecting cylinder b1102. The fulcrum shaft 17 passes through the node connecting plate 21 and is hinged to the embedded part 21. The other two corner points of the node connecting plate 21 are also connected to the hinge plate c102 of the first tie rod 1 or the second tie rod 2.

[0045] Example 1:

[0046] During the construction of the lower beam of the cable tower, the bottom ends of the first tie rod 1 and the second tie rod 2 are first hinged to the central axis of the sector block 301. Then, starting from the first tie rod 1 and the second tie rod 2, the upper chord 4 7, the upper chord 3 6, and the upper chord 2 5 are hinged in sequence. Finally, the upper chord 1 4 is connected to the two upper chord 2 5. At each hinge point, the upper chord node hinge plate shaft a12 is installed. Since the upper chord 4 7, the upper chord 3 6, the upper chord 2 5, and the upper chord 1 4 all have hinge plates a402 at both ends, the arc-shaped end faces on the adjacent hinge plates a402 are fastened to the outside of the hinge plate a1201 of the upper chord node hinge plate shaft a12. Then, the connecting block 306 at the bottom of the strut 1 8, the strut 2 9, and the strut 3 10 is connected to the connecting block 1 304 at the top of the sector block 301 by bolts. Finally, the node connecting plate 15 is connected by bolts. The bolt is connected to the threaded hole at the center of each hinge plate a402. At the same time, the hinge plates c102 set at each corner of the node connection plate 15 and the ends of the upper chord 4 7, upper chord 3 6, upper chord 2 5 and upper chord 1 4 and the top of the support rod 1 8, support rod 2 9 and support rod 3 10 are connected to complete the installation of the simple support. The assembled support is hoisted to the embedded part 21 on the tower column 22. The upper chord node hinge plate shaft b11 connected by the first tie rod 1 and the second tie rod 2 is connected to the embedded part 21. The fulcrum shaft 17 passes through the hinge shaft connecting cylinder b1102 in the upper chord node hinge plate shaft b11 and is connected and fixed to the shaft hole of the embedded part 21. The simple support can then be installed between the tower columns 22. Then, the template support beam 19 and the bottom plate template 20 are laid on the upper chord 4 7, upper chord 3 6, upper chord 2 5 and upper chord 1 4.

[0047] Example 2:

[0048] After the beam construction is completed, the simple support is removed from the embedded part 21, the fulcrum shaft 17 is removed from the embedded part 21, and then the connecting block 304 is removed from the strut connecting block and replaced with the connecting block 305. The strut 8 is connected to the connecting block 305. Then, the connecting block 305 connected to the strut 9 is removed, and the strut 9 is directly connected to the strut connecting rod. Then, the two struts 10 on the sector block 301 are removed, and the positions of the struts 10 are replaced with the first tie rod 1 and the second tie rod 2. Since the first tie rod 1 and the second tie rod 2 have multiple pin holes, due to the position adjustment, suitable pin holes are selected on the first tie rod 1 and the second tie rod 2. The pin hole is hinged to the central shaft 302 on the sector block 301. Finally, the upper chord 4 7 is disassembled, and then the upper chord 3 6 is connected to the embedded part 21 on the upper crossbeam. The bracket is adjusted to adapt to the construction of the upper crossbeam by disassembling some of the support rods and upper chords. The simple bracket can be disassembled and reused. After the lower crossbeam is constructed, it can be easily disassembled for use on the upper crossbeam. Moreover, it does not need to be welded to the embedded part 21. It is convenient to install and disassemble. It can be directly assembled between the tower columns 22, or assembled on the ground and then hoisted to the embedded part 21 of the tower column 22. It effectively improves construction efficiency, reduces difficulty and risk, reduces bracket wear, achieves efficient use of resources, and has significant economic and social benefits.

[0049] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A simple support for the construction of a multi-layer cable tower crossbeam of an extra-large bridge, comprising a first tie rod (1), a second tie rod (2), and a center block (3), characterized in that: It also includes embedded parts (21); the embedded parts (21) are set on the inner wall of the opposite side of the tower column (22); The upper chord assembly includes an upper chord 1 (4), an upper chord 2 (5), an upper chord 3 (6) and an upper chord 4 (7). The bottom ends of the first tie rod (1) and the second tie rod (2) are hinged to both sides of the center block (3). Starting from the top of the first tie rod (1) and the second tie rod (2), the upper chord 4 (7), the upper chord 3 (6) and the upper chord 2 (5) are hinged in sequence. The upper chord 1 (4) is set between the two upper chord 2 (5). The top of the upper chord 4 (7), the upper chord 3 (6) and the upper chord 2 (5) and the upper chord 1 (4) are used to lay the template support beam (19) and the bottom plate template (20). The first tie rod (1) and the second tie rod (2) are detachably connected to the embedded part (21). The strut assembly includes strut one (8), strut two (9) and strut three (10); strut one (8), strut two (9) and strut three (10) are connected sequentially at each hinge point starting from both sides of the upper chord strut one (4), and the bottom ends of strut one (8), strut two (9) and strut three (10) are detachably connected to the center block (3); The upper chord node hinge plate shaft a (12); each hinge point between the upper chord one (4), upper chord two (5), upper chord three (6) and upper chord four (7) is provided with an upper chord node hinge plate shaft a (12), and the outer walls on both sides of the upper chord node hinge plate shaft a (12) are also connected with node connecting plate one (15), and node connecting plate one (15) is also connected to the top of the adjacent upper chord assembly and the strut assembly; The upper chord node hinge plate shaft b (11) is hinged to the top of the first tie rod (1) and the second tie rod (2). The upper chord node hinge plate shaft b (11) is also connected to the fulcrum shaft (17). The fulcrum shaft (17) is hinged to the embedded part (21). The upper chord node hinge plate shaft b (11) is also connected to the node connecting plate two (16). The node connecting plate two (16) is also connected to the first tie rod (1) or the second tie rod (2) and the upper chord rod four (7) respectively.

2. The simplified support for the construction of multi-layer cable tower crossbeams of an extra-large bridge according to claim 1, characterized in that: The first pull rod (1) and the second pull rod (2) respectively include a pull plate a (101) and a pull plate one (201). The top of the pull plate a (101) and the pull plate one (201) are both welded with a hinge plate c (102). The hinge plate c (102) is connected to the node connecting plate two (16). The bottom of the pull plate one (201) is also welded with a pull plate two (202). The bottom of the pull plate two (202) is detachably connected to the center block (3).

3. The simplified support for the construction of multi-layer cable tower crossbeams of an extra-large bridge according to claim 2, characterized in that: The central block (3) includes a sector block (301) and a central shaft (302). The central shaft (302) is installed at the center of the bottom end of the sector block (301). The pull rod a and the second pull plate (202) are provided with multiple pin holes that match the central shaft (302). The bottom ends of the pull plate a (101) and the second pull plate (202) are hinged to the central shaft (302) through the pin holes.

4. The simplified support for the construction of multi-layer cable tower crossbeams of an extra-large bridge according to claim 3, characterized in that: The top of the fan-shaped block (301) is evenly distributed with multiple connecting blocks 1 (304), 2 (305) and 3 (306), and each connecting block 1 (304), 2 (305) and 3 (306) has a strut connecting plate welded to both ends. The bottom of strut 1 (8), strut 2 (9) and strut 3 (10) has a strut connecting plate (303).

5. A simplified support for the construction of multi-layer cable tower crossbeams of an extra-large bridge according to claim 4, characterized in that: Support rod one (8), support rod two (9) and support rod three (10) all include structural profile c (801) and hinge plate c (102). The hinge plate c (102) is welded to the top of the structural profile c (801). The end of the hinge plate c (102) is provided with an arc-shaped end face that fits against the arc surface of the hinge shaft plate a (1201) to form a hinge structure with a large contact surface.

6. A simplified support for the construction of multi-layer cable tower crossbeams of an extra-large bridge according to claim 1, characterized in that: The upper chord node hinge plate shaft a (12) includes a hinge shaft plate a (1201) and a hinge shaft connecting cylinder a (1202). The hinge shaft plate a (1201) is welded to both ends of the hinge shaft connecting cylinder a (1202), and the hinge shaft plate a (1201) has a threaded hole in the center. The node connecting plate a (15) is connected to the threaded hole by bolts.

7. A simplified support for the construction of multi-layer cable tower crossbeams of an extra-large bridge according to claim 6, characterized in that: Upper chord 1 (4), upper chord 2 (5), upper chord 3 (6) and upper chord 4 (7) all include structural profile a (401) and hinge plate a (402). Hinged plate a (402) is welded to both ends of structural profile a (401). The ends of structural profile a (401) and hinge plate a (402) are provided with arc-shaped end faces that fit with the arc surface of hinge shaft plate a (1201) to form a hinge structure with a large contact surface. Node connecting plate 1 (15) is a triangular structure. Its three corner points are also bolted to the top of adjacent hinge plate a (402) and support rod 1 (8) or support rod 2 (9) or support rod 3 (10).

8. A simplified support for the construction of multi-layer cable tower crossbeams of an extra-large bridge according to claim 2, characterized in that: The upper chord node hinge plate shaft b (11) includes a hinge shaft plate b (1101) and a hinge shaft connecting cylinder b (1102). The hinge shaft connecting cylinder b (1102) has hinge shaft plates b (1101) welded to both ends. The hinge shaft connecting cylinder b (1102) is inserted with a fulcrum shaft (17). The fulcrum shaft (17) passes through the node connecting plate two (16) and is connected to the embedded part (21). The other two corner points of the node connecting plate two (16) are also connected to the hinge plate c (102) of the first tie rod (1) or the second tie rod (2).

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