Steel tie rod joint with angle adjusting function and construction method thereof

Abstract

The invention relates to a steel tie rod joint with an angle adjusting function and a construction method thereof. The structure comprises an upper large-span steel structure and is provided with a first reserved hole connecting structure; the steel beam connecting node is provided with a second reserved hole connecting structure, the steel beam connecting node comprises a first structure adapter and a second structure adapter which are adjustable in connecting angle, and the second reserved hole connecting structure is formed between the first structure adapter and the second structure adapter; the lower structure steel beam is connected with the steel beam connecting node; the upper end of the steel pull rod is connected to the upper large-span steel structure through a first reserved hole connecting structure, and the lower end of the steel pull rod is connected with the steel beam connecting joint through a second reserved hole structure. The method is suitable for a large-span steel structure with the upper portion having curvature, and the construction requirements that steel pull rod suspension points are distributed along a curve, and lower steel beams need to be arranged in a radial shape, an arc shape or a variable-angle mode along with the curvature of the upper portion can be met.

Description

Technical Field

[0001] This invention relates to the field of steel structure engineering technology, and in particular to a steel tie rod node with angle adjustment function and its construction method, which is applicable to the suspension system of large public buildings such as large-span hyperbolic trusses, arched roofs, arched trusses, and curved cantilever structures. Background Technology

[0002] In the field of modern architecture, large-span curved structures, with their smooth curves and strong visual tension, have become a core element in shaping iconic buildings. They not only possess unique architectural aesthetics but also adapt to complex and ever-changing architectural forms and functional requirements. In realizing this curved aesthetic, suspended structures demonstrate significant advantages: in large public buildings (such as convention centers and airport terminals), they transfer the roof and floor loads to surrounding trusses or columns through steel rods or cables, achieving column-free spans of tens or even hundreds of meters. This allows exhibition halls, waiting areas, and other spaces to maintain ultimate transparency, not only meeting the functional needs of pedestrian flow but also cleverly avoiding the disruption of visual continuity caused by traditional supporting columns, ensuring the openness and fluidity of the space.

[0003] In the construction of curved structures, the layout and positioning of the curved beams is a major challenge. Currently, the main method involves using the vertical components of the main structure to position the chord segments of the curved beams, and measuring the distance from the curved segment to the midpoint of the chord using drawings to determine the specific position of the beam's uprights, thus completing the layout and positioning of the curved beams. However, due to limitations in construction site conditions, the midpoint of the chord is often difficult to determine precisely, and the actual operational accuracy is low, posing a significant challenge to the positioning of the curved beams. Connecting the curved beams is also a major problem. On the one hand, when welding at heights, the welding angle of the curved structure is difficult to control precisely. If the butt joint angle deviates, it can easily lead to irregular weld shapes, dimensions that do not meet design requirements, and even welding defects such as incomplete penetration, slag inclusions, and undercut. On the other hand, traditional steel structure connection nodes require custom-made adapters with different angles, which not only significantly increases factory prefabrication costs but also extends the production cycle, further reducing construction efficiency and failing to meet the demands of high-efficiency construction. Summary of the Invention

[0004] Therefore, the technical problem to be solved by this invention is to overcome the shortcomings of existing technologies, such as insufficient accuracy in the layout and positioning of curved beams, difficulty in controlling the welding angle of curved beams at high altitudes, and high prefabrication costs and low construction efficiency of traditional node connection methods. To address these issues, a steel tie rod node with angle adjustment function and its construction method are proposed.

[0005] To solve the above-mentioned technical problems, the present invention provides a steel tie rod joint with angle adjustment function, comprising: The upper large-span steel structure has curvature, and a first reserved hole connection structure is provided at the suspension point of the upper large-span steel structure; A steel beam connection node is provided with a second reserved hole connection structure. The steel beam connection node includes a first structural adapter and a second structural adapter with adjustable connection angle. The second reserved hole connection structure is formed between the first structural adapter and the second structural adapter. The lower structural steel beam is connected to the connection node of the steel beam; A steel tie rod, the upper end of which is connected to the upper large-span steel structure through the first reserved hole connection structure, and the lower end of which is connected to the steel beam connection node through the second reserved hole connection structure.

[0006] In one embodiment of the present invention, the upper and lower ends of the steel tie rod are respectively provided with threaded structures; The upper large-span steel structure has pads at the upper end of the first reserved hole connection structure and the steel beam connection node is at the lower end of the second reserved hole connection structure. The upper and lower ends of the steel tie rod pass through the first reserved hole connection structure and the second reserved hole connection structure, respectively, and are connected to double nuts through the threaded structure. Each double nut abuts against the corresponding pad. Rubber gaskets are provided in the gaps between the steel tie rod and the first and second pre-reserved hole connection structures, respectively.

[0007] In one embodiment of the present invention, the first structural adapter is provided with a first double-hole structure having two first reserved holes at the top and bottom, and the second structural adapter is provided with a second double-hole structure having two second reserved holes at the top and bottom. A sleeve is provided between the two second reserved holes in the second structural adapter. The two first reserved holes are respectively located at the outer ends of the corresponding second reserved holes and are coaxially arranged with the sleeve. The first double-hole structure, the second double-hole structure and the inner hole of the sleeve together form the second reserved hole connection structure.

[0008] In one embodiment of the present invention, the first structural adapter includes a first web and a first irregular flange plate connected to the upper and lower ends of the first web plate and arranged in parallel, having the first reserved hole; wherein, the first web plate is provided with a first bolt hole.

[0009] In one embodiment of the present invention, the second structural adapter includes a second web plate and a second irregular flange plate connected to the upper and lower ends of the second web plate and arranged in parallel, having the second reserved hole, wherein the second web plate is provided with a second bolt hole; a stiffening plate is provided between the sleeve and the two second irregular flange plates.

[0010] In one embodiment of the present invention, the inner diameter of the sleeve is the same as the diameter of the first reserved hole and the second reserved hole; the height of the second web plate is less than the vertical distance between the two first irregular flange plates, thereby realizing the placement of the second structural adapter in the hollow area of ​​the first structural adapter.

[0011] In one embodiment of the present invention, one opposite side profile of the first irregular flange plate and the second irregular flange plate is a combination of a single-sided broken line chamfer and a single-sided quarter circle arc edge, and the other opposite side profile is a straight line segment, so as to be suitable for welding the upper and lower flanges corresponding to the lower structural steel beam.

[0012] In one embodiment of the present invention, the single-sided folded-line chamfer of the first irregular flange plate and the second irregular flange plate are arranged opposite to each other; the first web plate and the second web plate are each provided with multiple pieces and arranged at an angle; The first web plate is connected to the web plate of the lower structural steel beam through the first bolt hole and high-strength bolt, and the first web plate is connected to the web plate of the lower structural steel beam through the second bolt hole and high-strength bolt.

[0013] In one embodiment of the present invention, the edge of the first reserved hole is provided with third bolt holes distributed circumferentially, and the edge of the second reserved hole is provided with fourth bolt holes distributed circumferentially and corresponding to the third bolt holes; the third bolt holes and the fourth bolt holes connect the corresponding first structural adapter and the second structural adapter through high-strength bolts, and the connection angle of the first structural adapter and the second structural adapter can be adjusted by different mating positions of the third bolt holes and the fourth bolt holes.

[0014] This invention also provides a method for hoisting a steel tie rod with angle adjustment function for a large-span arc-shaped suspension structure. Utilizing the aforementioned steel tie rod node with angle adjustment function, the construction method includes the following steps: S1. A first structural transition piece is formed by welding a first irregular flange plate with a first reserved hole to a first web plate; a second structural transition piece is formed by welding a second irregular flange plate with a second reserved hole, a second web plate, a sleeve, and a stiffening plate. S2. Place the second structural adapter in the hollow area of ​​the first structural adapter, adjust the docking angle of the two according to the curvature of the upper large-span steel structure, align the corresponding first reserved hole and the second reserved hole, and then connect and fix the first structural adapter and the second structural adapter with high-strength bolts to form a steel beam connection node. S3. Insert the steel tie rod into the second reserved hole connection structure of the steel beam connection node, arrange a pad at the lower end of the second reserved hole connection structure, tighten the lower end of the steel tie rod with double nuts, and set a rubber washer between the second reserved hole connection structure and the steel tie rod. S4. At the construction site, a truck crane is used to hoist the steel tie rods. The steel tie rods are lifted and passed through the first reserved hole connection structure and its corresponding pad in the upper large-span steel structure. The upper end of the steel tie rod is tightened with double nuts to form a tension system. At the same time, the steel tie rod and the steel beam connection node are rotated so that their direction is consistent with the curvature direction of the upper large-span steel structure. Rubber washers are installed between the first reserved hole connection structure and the steel tie rod. S5. Complete the installation of the remaining steel tie rods in sequence, and adjust the direction of each steel beam connection node to be consistent with the curvature direction of the upper large-span steel structure; S6. Use a truck crane to lift the lower structural steel beams to the same height as the steel beam connection nodes, and use a combination of flange welding and web plate and high-strength bolts to connect the lower structural steel beams to the steel beam connection nodes.

[0015] The above technical solution of the present invention has the following advantages over the prior art: The steel tie rod node with angle adjustment function and its construction method described in this invention are applicable to large-span steel structures with curvature in the upper part, such as arched roofs, arched trusses, and curved cantilever structures. This solution can meet the construction requirements of steel tie rod suspension points being distributed along the curve, and the lower steel beams needing to be arranged radially, arc-shaped, or at varying angles according to the curvature of the upper part.

[0016] This invention features a simple overall structure, high safety and reliability, and fast construction speed. The suspension system uses steel tie rods to form a stable, purely tension-bearing system, ensuring reasonable structural stress and preventing instability. The steel tie rods employ a double-nut anti-loosening design, further improving the reliability of node connections.

[0017] In terms of connection nodes, the present invention provides steel beam connection nodes with angle adjustment function, which effectively avoids direct welding operations at high altitudes. This not only ensures construction accuracy, but also eliminates the need for custom-made special angle adapters in the factory. The curvature of the superstructure can be flexibly adapted simply by rotating and adjusting the holes on site, thereby significantly improving construction efficiency.

[0018] The suspension structure of this invention adopts a top-down hoisting method using a truck crane, avoiding the need for large-scale temporary supports. The steel beam segments connected to the steel tie rods are connected to adjacent steel beams using a combination of "flange welding and high-strength bolts on the web". The steel beams are installed in sections, and errors can be fine-tuned at the nodes, thereby ensuring the accuracy and stability of the overall installation.

[0019] The present invention sets rubber gaskets between the steel tie rod and the first and second reserved holes. On the one hand, this can reduce friction and wear and the risk of cutting the hole edge, and on the other hand, it can enhance the shock absorption capacity of the node, thereby extending the service life of the node. Attached Figure Description

[0020] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the axonal structure of a steel tie rod node with angle adjustment function according to an embodiment of the present invention.

[0022] Figure 2 This is a front view of a steel tie rod node with angle adjustment function according to an embodiment of the present invention.

[0023] Figure 3 This is a perspective view of the steel beam connection node of the steel tie rod node with angle adjustment function according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the axial structure of the first structural adapter according to an embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the axial structure of the second structural adapter according to an embodiment of the present invention.

[0026] Figure 6 This is a schematic diagram of step S1 of the steel tie rod hoisting construction method with angle adjustment function according to an embodiment of the present invention.

[0027] Figure 7 This is a schematic diagram of step S2 of the steel tie rod hoisting construction method with angle adjustment function according to an embodiment of the present invention.

[0028] Figure 8 This is a schematic diagram of step S3 of the steel tie rod hoisting construction method with angle adjustment function according to an embodiment of the present invention.

[0029] Figure 9 This is a schematic diagram of step S4 of the steel tie rod hoisting construction method with angle adjustment function according to an embodiment of the present invention.

[0030] Figure 10This is a schematic diagram of step S5 of the steel tie rod hoisting construction method with angle adjustment function according to an embodiment of the present invention.

[0031] Figure 11 This is a schematic diagram of step S6 of the steel tie rod hoisting construction method with angle adjustment function according to an embodiment of the present invention.

[0032] Explanation of reference numerals on the accompanying drawings: 1. Upper large-span steel structure; 11. First reserved hole connection structure; 2. Steel beam connection node; 21. Second reserved hole connection structure; 3. First structural adapter; 31. First reserved hole; 311. Third bolt hole; 32. First web; 321. First bolt hole; 33. First irregular flange; 331. Single-sided zigzag chamfer; 332. Rounded edge; 333. Straight segment; 4. Second structural adapter; 41. Second reserved hole; 411. Fourth bolt hole; 42. Sleeve; 43. Second web plate; 431. Second bolt hole; 44. Second irregular flange plate; 45. Stiffening plate; 5. Substructure steel beams; 6. Steel tie rod; 61. Threaded structure; 62. Double nut; 63. Washer plate; 64. Rubber washer; 7. High-strength bolts. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0034] In this invention, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this invention, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0035] In the present invention, "several" means one or more, "multiple" means more than two, "greater than," "less than," "exceeds," etc. are understood to exclude the number itself; "above," "below," "within," etc. are understood to include the number itself. In the description of the present invention, the use of "first" or "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0036] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention based on the specific content of the technical solution.

[0037] Reference Figure 1 As shown, a steel tie rod joint with angle adjustment function includes: The upper large-span steel structure 1 has curvature (such as an arched roof, an arched truss, or a curved cantilever structure), and a first reserved hole connection structure 11 is provided at the suspension point of the upper large-span steel structure 1. The steel beam connection node 2 is provided with a second reserved hole connection structure 21. The steel beam connection node 2 includes a first structural adapter 3 and a second structural adapter 4 with adjustable connection angle. The second reserved hole connection structure 21 is formed between the first structural adapter 3 and the second structural adapter 4. The lower structural steel beam 5 is connected to the steel beam connection node 2; the lower steel beam needs to be arranged radially, arc-shaped or at a variable angle according to the curvature of the upper large-span steel structure 1. The steel tie rod 6 is a purely tension member. The upper end of the steel tie rod 6 is connected to the upper large-span steel structure 1 through the first reserved hole connection structure 11, and the lower end of the steel tie rod 6 is connected to the steel beam connection node 2 through the second reserved hole connection structure 21.

[0038] In one embodiment, refer to Figure 2 As shown, the upper and lower ends of the steel tie rod 6 are respectively forged and upsetting to form threaded structures 61; The upper large-span steel structure 1 has pads 63 arranged at the upper end of the first reserved hole connection structure 11 and the steel beam connection node 2 is arranged at the lower end of the second reserved hole connection structure 21. The upper and lower ends of the steel tie rod 6 pass through the first reserved hole connection structure 11 and the second reserved hole connection structure 21 respectively, and are connected to double nuts 62 through the threaded structure 61. Each double nut 62 abuts against the corresponding pad 63, so that the steel tie rod 6 forms a tension system.

[0039] In addition, rubber gaskets 64 are provided in the gaps between the steel tie rod 6 and the first reserved hole connection structure 11 and the second reserved hole connection structure 21, respectively, to reduce the friction and wear between the steel tie rod 6 and the hole wall and to prevent the tie rod from being cut by the hole edge when under force.

[0040] In one embodiment, refer to Figure 4 As shown, the first structural adapter 3 is provided with a first double-hole structure having two first reserved holes 31 at the top and bottom, and the second structural adapter 4 is provided with a second double-hole structure having two second reserved holes 41 at the top and bottom. A sleeve 42 is provided between the two second reserved holes 41 in the second structural adapter 4. The two first reserved holes 31 are respectively located at the outer ends of the corresponding second reserved holes 41 and are coaxially arranged with the sleeve 42. The first double-hole structure, the second double-hole structure and the inner hole of the sleeve 42 together form the second reserved hole connection structure 21.

[0041] In one embodiment, the first structural adapter 3 includes a first web plate 32 and a first irregular flange plate 33 connected to the upper and lower ends of the first web plate 32 and arranged in parallel, having the first reserved hole 31; wherein, the first web plate 32 is provided with a first bolt hole 321.

[0042] In one embodiment, refer to Figure 5 As shown, the second structural adapter 4 includes a second web plate 43 and a second irregular flange plate 44 connected to the upper and lower ends of the second web plate 43 and arranged in parallel, having the second reserved hole 41. The second web plate 43 is provided with a second bolt hole 431. A stiffening plate 45 is provided between the sleeve 42 and the two second irregular flange plates 44.

[0043] In one embodiment, the inner diameter of the sleeve 42 is the same as the diameter of the first reserved hole 31 and the second reserved hole 41; the height of the second web plate 43 is less than the vertical distance between the two first irregular flange plates 33, thereby placing the second structural adapter 4 in the hollow area of ​​the first structural adapter 3.

[0044] In one embodiment, refer to Figure 4 As shown, one opposite side profile of the first irregular flange plate 33 and the second irregular flange plate 44 is a combination of a single-sided broken line chamfer 331 and a single-sided quarter circle arc edge 332, and the other opposite side profile is a straight line segment 333, so as to be suitable for welding the upper and lower flanges corresponding to the lower structural steel beam 5 together.

[0045] In one embodiment, refer to Figure 3As shown, the single-sided folded chamfer 331 of the first irregular flange plate 33 and the second irregular flange plate 44 are arranged opposite to each other; the first web plate 32 and the second web plate 43 are each provided with multiple pieces and arranged at an angle; The first web plate 32 is connected to the web plate of the lower structural steel beam 5 through the first bolt hole 321 and the high-strength bolt 7, and the first web plate 32 is connected to the web plate of the lower structural steel beam 5 through the second bolt hole 431 and the high-strength bolt 7.

[0046] In one embodiment, refer to Figure 4 , Figure 5 , Figure 7 As shown, the edge of the first reserved hole 31 is provided with third bolt holes 311 distributed circumferentially, and the edge of the second reserved hole 41 is provided with fourth bolt holes 411 distributed circumferentially and corresponding to the third bolt holes 311. The third bolt holes 311 and the fourth bolt holes 411 are connected to the corresponding first structural adapter 3 and second structural adapter 4 by high-strength bolts 7, and the connection angle of the first structural adapter 3 and the second structural adapter 4 can be adjusted by different mating positions of the third bolt holes 311 and the fourth bolt holes 411.

[0047] With the above settings, the steel beam connection node 2 has an angle adjustment function, which is suitable for upper large-span steel structures 1 with curvature (such as arched roofs, arched trusses, and curved cantilever structures). It can meet the requirement that the suspension points of the steel tie rods 6 are distributed along the curve, and that the lower steel beams need to be arranged radially, arc-shaped, or at a variable angle according to the curvature of the upper large-span steel structure 1.

[0048] This embodiment also provides a method for hoisting a steel tie rod 6 with angle adjustment function for a large-span arc-shaped suspension structure. Utilizing the aforementioned steel tie rod node with angle adjustment function, the construction method includes the following steps: S1. A first structural adapter 3 is formed by welding a first irregular flange plate 33 with a first reserved hole 31 to a first web plate 32; a second structural adapter 4 is formed by welding a second irregular flange plate 44 with a second reserved hole 41, a second web plate 43, a sleeve 42, and a stiffening plate 45; see reference. Figure 6 As shown; S2. Place the second structural adapter 4 within the hollow area of ​​the first structural adapter 3. Adjust the docking angle between the two according to the curvature of the upper large-span steel structure 1. After aligning the corresponding first reserved hole 31 and second reserved hole 41, connect and fix the first structural adapter 3 and the second structural adapter 4 with high-strength bolts 7 to form the steel beam connection node 2; refer to Figure 7 As shown; S3. Insert the steel tie rod 6 into the second reserved hole connection structure 21 of the steel beam connection node 2. Place a pad 63 at the lower end of the second reserved hole connection structure 21 and tighten the lower end of the steel tie rod 6 with double nuts 62. Place a rubber washer 64 between the second reserved hole connection structure 21 and the steel tie rod 6. (Refer to...) Figure 8 As shown; S4. At the construction site, a truck crane is used to hoist the steel tie rod 6. The steel tie rod 6 is lifted and passed through the first reserved hole connection structure 11 of the upper large-span steel structure 1 and its corresponding pad 63. The upper end of the steel tie rod 6 is tightened with double nuts 62 to form a tension system. At the same time, the steel tie rod 6 and the steel beam connection node 2 are rotated so that their direction is consistent with the curvature direction of the upper large-span steel structure 1. A rubber washer 64 is placed between the first reserved hole connection structure 11 and the steel tie rod 6. (Refer to...) Figure 9 As shown; S5. Complete the installation of the remaining steel tie rods 6 in sequence, and adjust the direction of each steel beam connection node 2 to be consistent with the curvature direction of the upper large-span steel structure 1; refer to Figure 10 As shown; S6. Using a truck crane, lift the lower structural steel beam 5 to the same height as the steel beam connection node 2. Connect the lower structural steel beam 5 to the steel beam connection node 2 using a combination of flange welding and web plate and high-strength bolts 7. (Refer to...) Figure 11 As shown.

[0049] With the above-mentioned configuration, the steel tie rod 6 node is suitable for upper large-span steel structures 1 with curvature (such as arched roofs, arched trusses, and curved cantilever structures). It can meet the requirement that the suspension points of the steel tie rod 6 are distributed along the curve, and that the lower structural steel beams 5 are arranged radially, arc-shaped, or at varying angles according to the curvature of the upper structure. Furthermore, the present invention has a simple structure, is safe and reliable, and has a fast construction speed. The suspension structure adopts the steel tie rod 6 structure to form a stable pure tension system, ensuring that the structure is stable under stress. The steel tie rod 6 adopts a double nut 62 anti-loosening design to further ensure the reliability of the connection. The steel beam connection node with angle adjustment function avoids direct welding operations at high altitudes, ensuring construction accuracy. It does not require special factory customization. The curvature of the upper structure can be adapted by rotating and adjusting the holes on site, which improves construction efficiency. The suspension structure is hoisted from top to bottom by a truck crane, avoiding the investment of a large number of supports. The steel beam connection section connected to the steel tie rod 6 and the adjacent steel beam adopt a combination connection method of "flange welding + web high-strength bolts". The steel beam adopts a segmented installation method, and the error can be finely adjusted through the nodes.

[0050] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A steel tie rod joint with angle adjustment function, characterized in that, include: The upper large-span steel structure (1) has curvature, and a first reserved hole connection structure (11) is provided at the suspension point of the upper large-span steel structure (1). The steel beam connection node (2) is provided with a second reserved hole connection structure (21). The steel beam connection node (2) includes a first structural adapter (3) and a second structural adapter (4) with adjustable connection angle. The second reserved hole connection structure (21) is formed between the first structural adapter (3) and the second structural adapter (4). The lower structural steel beam (5) is connected to the steel beam connection node (2); The upper end of the steel tie rod (6) is connected to the upper large-span steel structure (1) through the first reserved hole connection structure (11), and the lower end of the steel tie rod (6) is connected to the steel beam connection node (2) through the second reserved hole connection structure (21).

2. A steel tie rod node with angle adjustment function according to claim 1, characterized in that, The upper and lower ends of the steel tie rod (6) are respectively provided with threaded structures (61). The upper large-span steel structure (1) has pads (63) arranged at the upper end of the first reserved hole connection structure (11) and the steel beam connection node (2) is arranged at the lower end of the second reserved hole connection structure (21). The upper and lower ends of the steel tie rod (6) pass through the first reserved hole connection structure (11) and the second reserved hole connection structure (21) respectively, and are connected to double nuts (62) through the threaded structure (61). Each double nut (62) abuts against the corresponding pad (63). A rubber gasket (64) is provided in the gap between the steel tie rod (6) and the first reserved hole connection structure (11) and the second reserved hole connection structure (21).

3. A steel tie rod node with angle adjustment function according to claim 1, characterized in that, The first structural adapter (3) is provided with a first double hole structure having two first reserved holes (31) at the top and bottom. The second structural adapter (4) is provided with a second double hole structure having two second reserved holes (41) at the top and bottom. The second structural adapter (4) is provided with a sleeve (42) between the two second reserved holes (41). The two first reserved holes (31) are respectively located at the outer ends of the corresponding second reserved holes (41) and are coaxially arranged with the sleeve (42). The first double hole structure, the second double hole structure and the inner hole of the sleeve (42) together form the second reserved hole connection structure (21).

4. A steel tie rod node with angle adjustment function according to claim 3, characterized in that, The first structural adapter (3) includes a first web plate (32) and a first irregular flange plate (33) connected to the upper and lower ends of the first web plate (32) and arranged in parallel, having the first reserved hole (31); wherein, the first web plate (32) is provided with a first bolt hole (321).

5. A steel tie rod node with angle adjustment function according to claim 4, characterized in that, The second structural adapter (4) includes a second web plate (43) and a second irregular flange plate (44) connected to the upper and lower ends of the second web plate (43) and arranged in parallel, having the second reserved hole (41). The second web plate (43) is provided with a second bolt hole (431). A stiffening plate (45) is provided between the sleeve (42) and the two second irregular flange plates (44).

6. A steel tie rod node with angle adjustment function according to claim 5, characterized in that, The inner diameter of the sleeve (42) is consistent with the diameter of the first reserved hole (31) and the second reserved hole (41); the height of the second web plate (43) is less than the vertical distance between the two first irregular flange plates (33), thereby realizing the placement of the second structural adapter (4) in the hollow area of ​​the first structural adapter (3).

7. A steel tie rod node with angle adjustment function according to claim 5, characterized in that, The first irregular flange plate (33) and the second irregular flange plate (44) have a combination of a single-sided broken line chamfer (331) and a single-sided quarter circle arc edge (332) on one opposite side, and a straight line segment (333) on the other opposite side, so as to be suitable for welding the upper and lower flanges corresponding to the lower structural steel beam (5) together.

8. A steel tie rod node with angle adjustment function according to claim 7, characterized in that, The single-sided folded chamfer (331) of the first irregular flange (33) and the second irregular flange (44) are arranged opposite to each other; the first web plate (32) and the second web plate (43) are provided with multiple pieces and arranged at an angle; The first web plate (32) is connected to the web plate of the lower structural steel beam (5) through the first bolt hole (321) and the high-strength bolt (7), and the first web plate (32) is connected to the web plate of the lower structural steel beam (5) through the second bolt hole (431) and the high-strength bolt (7).

9. A steel tie rod node with angle adjustment function according to claim 1, characterized in that, The edge of the first reserved hole (31) is provided with a third bolt hole (311) distributed along the circumference, and the edge of the second reserved hole (41) is provided with a fourth bolt hole (411) distributed along the circumference and corresponding to the third bolt hole (311). The third bolt hole (311) and the fourth bolt hole (411) are connected to the corresponding first structural adapter (3) and second structural adapter (4) by high-strength bolts (7), and the connection angle of the first structural adapter (3) and the second structural adapter (4) can be adjusted by different mating positions of the third bolt hole (311) and the fourth bolt hole (411).

10. A method for hoisting steel tie rods with angle adjustment function for large-span arc-shaped suspension structures, characterized in that, The construction method using a steel tie rod joint with angle adjustment function as described in any one of claims 1-9 includes the following steps: S1. A first structural adapter (3) is formed by welding a first irregular flange plate (33) with a first reserved hole (31) and a first web plate (32); a second structural adapter (4) is formed by welding a second irregular flange plate (44) with a second reserved hole (41), a second web plate (43), a sleeve (42) and a stiffening plate (45). S2. Place the second structural adapter (4) in the hollow area of ​​the first structural adapter (3), adjust the docking angle of the two according to the curvature of the upper large-span steel structure (1), align the corresponding first reserved hole (31) and the second reserved hole (41), and then connect and fix the first structural adapter (3) and the second structural adapter (4) with high-strength bolts (7) to form a steel beam connection node (2). S3. Insert the steel tie rod (6) into the second reserved hole connection structure (21) of the steel beam connection node (2), place a pad (63) at the lower end of the second reserved hole connection structure (21), and tighten the lower end of the steel tie rod (6) with double nuts (62). Set a rubber washer (64) between the second reserved hole connection structure (21) and the steel tie rod (6). S4. At the construction site, a truck crane is used to lift the steel tie rod (6). The steel tie rod (6) is lifted and passed through the first reserved hole connection structure (11) and its corresponding pad (63) of the upper large-span steel structure (1). The upper end of the steel tie rod (6) is tightened with double nuts (62) to form a tension system. At the same time, the steel tie rod (6) and the steel beam connection node (2) are rotated so that their direction is consistent with the curvature direction of the upper large-span steel structure (1). A rubber washer (64) is set between the first reserved hole connection structure (11) and the steel tie rod (6). S5. Complete the installation of the remaining steel tie rods (6) in sequence, and adjust the direction of each steel beam connection node (2) to be consistent with the curvature direction of the upper large-span steel structure (1); S6. Use a truck crane to lift the lower structural steel beam (5) to the same height plane as the steel beam connection node (2), and use a combination of flange welding and web plate and high-strength bolts (7) to connect the lower structural steel beam (5) to the steel beam connection node (2).

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