Method for setting temporary external cable system during rotation or lifting construction of concrete-filled steel tube arch rib

Abstract

According to the method for arranging the temporary external cable system during rotation or lifting construction of the concrete-filled steel tube arch rib, the temporary cable is arranged on the outer side of the horizontal projection of the concrete-filled steel tube arch rib through the mounting base, so that the temporary cable does not interfere with an arch rib low-position splicing support, and therefore in the early-stage small-section splicing process of the arch rib, the construction efficiency is improved. By means of the arch rib low-position assembling support, the separated design can be avoided, the construction safety is improved, the influence on arch rib installation and positioning is reduced, and early-stage arch rib small-section assembling is facilitated; meanwhile, the internal force load borne by the temporary cable in the working process can be transmitted to the arch rib through the mounting seat, so that the stress borne by the arch rib is dispersed, and the safety of the structure is improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel tube concrete arch bridge construction, and in particular to a method for setting a temporary external cable system when a steel tube concrete arch rib is rotated or lifted. Background Art

[0002] Steel tube concrete arch bridge is a bridge type with novel structure and excellent mechanical properties. In recent years, it has gradually attracted the attention and favor of the engineering community. In terms of economy, steel tube concrete arch bridge has a high bearing capacity against external forces, which can reduce the self-weight of the bridge, thereby reducing the cost burden; in terms of short construction period, due to the use of prefabricated components and on-site assembly, it can save construction time, shorten the construction period, and improve engineering efficiency; in terms of excellent mechanical properties, steel tube concrete arch bridge has good stiffness and seismic resistance, can adapt to various complex bridge environments and load requirements, and ensure the safety and reliability of the bridge. The frequency of application of steel tube concrete arch bridges with the above advantages in the field of transportation construction has increased year by year.

[0003] In the construction of domestic steel tube concrete arch bridges, the overall structure lifting method has been widely used due to its short construction period, mature technology, and complete construction equipment. In order to ensure the stability of the arch rib during the lifting construction process, temporary cables need to be set at both ends of the arch rib lifting section to constrain the deformation trend of the arch rib during the lifting stage and form a stable overall structure. The installation of temporary cables is a key link in the construction. It is directly related to the stability, safety and construction accuracy of the arch rib lifting section, and is crucial to improving the overall bridge quality and construction efficiency.

[0004] In the prior art, temporary cables are usually fixed to the hanger holes of the arch foot for installing hangers. The arch rib structure itself can be used as an anchor point to reduce the modification of the arch rib structure. The use of the hanger holes determines that the temporary cables must pass through the position directly below the arch rib, resulting in a relatively large local stress on the hanger holes. In addition, during the construction of steel tube concrete arch ribs, a low-position assembly bracket for the arch rib is usually built first, and after the various segments of the steel tube concrete arch rib are spliced ​​on the low-position assembly bracket for the arch rib, the lifting and rotation are performed using a lifting device to complete the installation. Since the temporary cable must pass through the position directly below the arch rib, during the lifting process of the arch rib, the temporary cable and the low-position assembly bracket for the arch rib below the arch rib will interfere. In order to prevent the low-position assembly bracket for the arch rib from hindering the lifting or rotation of the arch rib, in the prior art, the low-position assembly bracket for the arch rib is mostly designed in a split form to avoid the temporary cable, which brings about the defects of poor bracket stability and high foundation bearing capacity requirements. However, if temporary connections are added between the split supports to enhance the stability of the supports, the vertical displacement of the temporary cables will be blocked, requiring manual additional disassembly work during the arch rib installation, increasing the safety risks of the construction. Summary of the invention

[0005] In order to solve the technical problems raised in the background technology, the present invention aims to provide a method for setting up a temporary external cable system when a steel tube concrete arch rib is rotated or lifted, so as to solve the technical problem that the existing conventional technology uses hanger holes as temporary cable anchoring points, which easily causes stress concentration in the hanger holes and makes it difficult to improve the structural stress safety factor; at the same time, the arch rib low-position assembly bracket needs to avoid the temporary cables in the spatial structure, which is not conducive to the early assembly of small segments of the arch rib.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A method for setting up a temporary external cable system when a steel tube concrete arch rib is rotated or lifted, comprising the following steps:

[0008] S1, building a low-position assembly bracket for arch ribs, assembling arch rib segments on the low-position assembly bracket for arch ribs, and obtaining a steel tube concrete arch rib;

[0009] S2, installing a temporary external cable system on the steel tube concrete arch rib: the temporary external cable system includes two mounting seats and two temporary cables, the two mounting seats are respectively fixed to the opposite ends of the steel tube concrete arch rib, the two temporary cables are respectively arranged on the opposite sides of the steel tube concrete arch rib, and are arranged outside the horizontal projection of the steel tube concrete arch rib and the horizontal projection of the arch rib low-position assembly bracket, and the two ends of each temporary cable are respectively connected to the two mounting seats;

[0010] S3, when the steel tube concrete arch rib is rotated or lifted, the temporary cable is tensioned by a jack to form a horizontal restraining force, so as to achieve the purpose of controlling the line shape and posture of the arch rib.

[0011] Furthermore, the mounting seat includes two bases and a shoulder pole beam, the two bases are respectively fixed on opposite sides of the steel tube concrete arch rib along the transverse direction, the shoulder pole beam is parallel to the transverse direction and fixedly connected to the two bases, and the opposite ends of the shoulder pole beam extend to the outside of the opposite sides of the steel tube concrete arch rib along the transverse direction; one end of the two temporary cables is respectively connected to the opposite ends of the shoulder pole beam of one of the mounting seats, and the other ends of the two temporary cables are respectively connected to the opposite ends of the shoulder pole beam of the other mounting seat.

[0012] Furthermore, the base includes two support plates, two groups of rib plates and a fixed plate, the two support plates are spaced apart along the transverse direction of the bridge, the bottom of each support plate is fixedly connected to the steel tube concrete arch rib, the two groups of rib plates are respectively arranged on the two support plates, and are located on the side of the corresponding support plate facing away from the other support plate, each rib plate is fixedly connected to the corresponding support plate and the steel tube concrete arch rib; the fixed plate is fixedly connected to the two groups of rib plates and the tops of the two support plates; the shoulder beam is fixedly connected to the fixed plates of the two bases.

[0013] Furthermore, the shoulder pole beam includes two mounting plates, two webs and a plurality of partitions, the two mounting plates are arranged in parallel and at intervals, one of the mounting plates is fixedly connected to the two bases, the two webs are respectively arranged on opposite sides of the mounting plates, and each web is fixedly connected to the two mounting plates; a plurality of partitions are arranged at intervals along the length direction of the mounting plates, and each partition is fixedly connected to the two mounting plates and the two webs; the temporary rope is passed through and fixed on the two mounting plates.

[0014] Furthermore, the mounting plate is provided with mounting holes, the temporary cable is passed through the mounting holes on the two mounting plates, the temporary cable is tensioned by a jack, and then a repeatable tensioning anchor is used to fix the temporary cable to the mounting plate of the shoulder beam.

[0015] Furthermore, the shoulder pole beam also includes an anchor plate, and the anchor plate is arranged between the repeatable tensioning anchor and the mounting plate.

[0016] Furthermore, the two mounting plates and the two webs are arranged to form a cavity, and the partition is fixed in the cavity; the shoulder beam also includes two pairs of reinforcing plate assemblies, and the two pairs of reinforcing plate assemblies are respectively arranged at the two mounting holes, and each pair of reinforcing plate assemblies are respectively arranged on opposite sides of the corresponding mounting holes, and the reinforcing plate assemblies are fixed in the cavity.

[0017] Furthermore, the reinforcing plate assembly includes a vertical plate and two horizontal plates, the vertical plate is parallel to the web plate, and the opposite ends of the vertical plate are respectively fixedly connected to the two mounting plates; the two horizontal plates are respectively arranged on opposite sides of the vertical plate, and each horizontal plate is vertically connected to the vertical plate and the mounting plate on the corresponding side.

[0018] Furthermore, the steel tube concrete arch rib includes two upper chords arranged oppositely, two lower chords arranged oppositely, an upper connecting rod connecting the two upper chords, a lower connecting rod connecting the two lower chords, and a web connecting the upper chord and the lower chord. The two mounting seats are respectively connected to the two lower chords and are located at the intersection of the corresponding lower chord, the lower connecting rod and the web.

[0019] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0020] Compared with the conventional technology that uses hanger holes as temporary cable anchoring points, the method for setting up the temporary external cable system during the rotation or lifting construction of the above-mentioned steel tube concrete arch rib arranges the temporary cable on the outside of the horizontal projection of the steel tube concrete arch rib through a mounting seat, so that it will not interfere with the low-position assembly bracket of the arch rib, and then in the early assembly process of the small segments of the arch rib, the low-position assembly bracket of the arch rib can avoid using a separate design, thereby improving construction safety and reducing the impact on the installation and positioning of the arch rib, which is beneficial to the early assembly of the small segments of the arch rib; at the same time, the internal force load received by the temporary cable during work can be transmitted to the arch rib through the mounting seat, so that the stress on the arch rib is dispersed, which is beneficial to improving the safety of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a method for setting a temporary external cable system when a steel tube concrete arch rib is rotated or lifted using a preferred embodiment of the present invention after the temporary cables are installed;

[0022] Figure 2 for Figure 1 Partial structural diagram where the mounting seat is provided;

[0023] Figure 3 for Figure 2 A schematic diagram of a top view of a partial structure;

[0024] Figure 4 for Figure 2 A magnified view of a portion of the structure;

[0025] Figure 5 for Figure 4 A cross-sectional view along the cross section of the lower chord after removing the shoulder beam and temporary cables;

[0026] Figure 6 It is a structural schematic diagram of a shoulder pole beam in a preferred embodiment of the present invention;

[0027] Figure 7 for Figure 6 The right side structural diagram after removing the repeatable tensioning anchor;

[0028] Main component symbols

[0029] 10. Arch rib low-position assembly bracket; 11. Bracket; 20. Steel tube concrete arch rib; 21. Upper chord; 23. Lower chord; 25. Upper tie rod; 27. Lower tie rod; 29. ​​Web rod; 30. Temporary external cable system; 31. Mounting seat; 32. Base; 321. Support plate; 322. Rib plate; 323. Fixed plate; 34. Shoulder beam; 341. Mounting plate; 342. Mounting hole; 343. Web plate; 345. Partition plate; 35. Reinforcement plate assembly; 351. Vertical plate; 353. Horizontal plate; 36. Anchor plate; 37. Temporary cable; 38. Repeatable tensioning anchor. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] Please also see Figures 1 to 7 A preferred embodiment of the present invention provides a method for setting a temporary external cable system when a steel tube concrete arch rib is rotated or lifted, comprising the following steps:

[0034] S1, build the arch rib low-position assembly bracket 10, complete the assembly of the arch rib segments on the arch rib low-position assembly bracket 10, and obtain the steel tube concrete arch rib 20. The arch rib low-position assembly bracket in the prior art is a split bracket, which is arranged along the length direction of the arch rib. Each group of split brackets includes two brackets arranged along the width direction of the arch rib, that is, the cross-bridge direction. The two brackets are arranged on opposite sides of the temporary cable, and the two brackets are not connected to each other to form an escape space for the temporary cable to avoid the position (not shown in the figure). In this embodiment, the arch rib low-position assembly bracket 10 is an integral structure, that is, the two groups of brackets 11 are connected to each other, and there is no need to set a gap between the two groups of brackets 11 to form an escape space for the temporary cable 37 to avoid the position.

[0035] The structure of the steel tube concrete arch rib 20 in this embodiment is the existing technology, which usually includes two upper chords 21, two lower chords 23, a plurality of upper connecting rods 25, a plurality of lower connecting rods 27 and two groups of web members 29. The two upper chords 21 are arranged opposite to each other along the transverse bridge direction, and the two lower chords 23 are arranged opposite to each other below the upper chords 21 along the transverse bridge direction. A plurality of upper connecting rods 25 connect the two upper chords 21, and a plurality of lower connecting rods 27 connect the two lower chords 23. The upper chords 21 and the lower chords 23 on the same side are connected by web members 29.

[0036] S2. Install a temporary external cable system 30 on the steel tube concrete arch rib 20: the temporary external cable system 30 includes two mounting seats 31 and two temporary cables 37. The two mounting seats 31 are respectively fixed at the opposite ends of the steel tube concrete arch rib 20. The two temporary cables 37 are respectively arranged on the opposite sides of the steel tube concrete arch rib 20 and are arranged on the outside of the horizontal projection of the steel tube concrete arch rib 20 and the horizontal projection of the arch rib low-position assembly bracket 10. The two ends of each temporary cable 37 are respectively connected to the two mounting seats 31.

[0037] In this embodiment, the two mounting seats 31 are respectively connected to the two lower chords 23 and are located at the intersection of the corresponding lower chords 23, the lower tie rods 27 and the web members 29. Each mounting seat 31 includes two bases 32 and a shoulder beam 34. The two bases 32 are respectively fixed to the opposite sides of the steel tube concrete arch rib 20 along the transverse bridge direction. Specifically, the two bases 32 are respectively fixed to the intersection of the two lower chords 23 of the steel tube concrete arch rib 20 and the corresponding lower tie rods 27 and the web members 29. Each base 32 includes two support plates 321, two groups of ribs 322 and a fixed plate 323. The two support plates 321 are spaced apart in the transverse direction of the bridge. The bottom of each support plate 321 is fixedly connected to the lower chord 23 of the steel tube concrete arch rib 20, and the side of each support plate 321 is fixedly connected to the web 29; the two groups of ribs 322 are respectively arranged on the two support plates 321 and are located on the side of the corresponding support plate 321 facing away from the other support plate 321. Each rib 322 is fixedly connected to the corresponding support plate 321 and the steel tube concrete arch rib 20. Specifically, one group of ribs 322 is fixedly connected to the corresponding support plate 321 and the lower chord 23 of the steel tube concrete arch rib 20, and the other group of ribs 322 is fixedly connected to the corresponding support plate 321 and the lower chord 23 and the lower tie rod 27 of the steel tube concrete arch rib 20; the fixed plate 323 is fixedly connected to the two groups of ribs 322 and the tops of the two support plates 321.

[0038] The shoulder beam 34 is parallel to the transverse bridge direction and fixedly connected to the two bases 32. The opposite ends of the shoulder beam 34 extend to the opposite sides of the steel tube concrete arch rib 20 along the transverse bridge direction. In this embodiment, the shoulder beam 34 is fixedly connected to the fixing plate 323 of the two bases 32. The shoulder beam 34 includes two mounting plates 341, two webs 343 and a plurality of partitions 345. The two mounting plates 341 are arranged in parallel and spaced apart. The two webs 343 are respectively arranged on the opposite sides of the mounting plates 341. Each web 343 is fixedly connected to the two mounting plates 341, so that the two mounting plates 341 and the two webs 343 are surrounded to form a cavity (not shown). One of the mounting plates 341 is fixedly connected to the fixing plate 323 of the two bases 32, and the mounting plate 341 is provided with a mounting hole 342, and the mounting hole 342 is used to install the temporary cable 37. The partition plates 345 are fixed in the cavity. A plurality of partition plates 345 are arranged at intervals along the length direction of the mounting plates 341 . Each partition plate 345 is fixedly connected to two mounting plates 341 and two web plates 343 .

[0039] In this embodiment, the shoulder beam 34 further includes two pairs of reinforcing plate assemblies 35, which are respectively arranged at two mounting holes 342, and each pair of reinforcing plate assemblies 35 are respectively arranged at opposite sides of the corresponding mounting holes 342, and the reinforcing plate assemblies 35 are fixed in the cavity. Each reinforcing plate assembly 35 includes a vertical plate 351 and two horizontal plates 353, the vertical plate 351 is parallel to the web plate 343, and the opposite ends of the vertical plate 351 are respectively fixedly connected to the two mounting plates 341; the two horizontal plates 353 are respectively arranged at opposite sides of the vertical plate 351, and each horizontal plate 353 is vertically connected to the vertical plate 351 and the mounting plate 341 on the corresponding side.

[0040] One end of the two temporary cables 37 is connected to the opposite ends of the shoulder beam 34 of one of the mounting seats 31, and the other end of the two temporary cables 37 is connected to the opposite ends of the shoulder beam 34 of the other mounting seat 31. The temporary cables 37 are made of prestressed steel strands. In this embodiment, one end of the temporary cables 37 is passed through and fixed on the two mounting plates 341 of one of the mounting seats 31, and the other end of the temporary cables 37 is passed through and fixed on the two mounting plates 341 of the other mounting seat 31. Specifically, the temporary cables 37 are passed through the mounting holes 342 on the two mounting plates 341 of the shoulder beam 34, and the temporary cables 37 are tensioned by a jack, and then the temporary cables 37 are fixed to the mounting plates 341 of the shoulder beam 34 by a repeatable tensioning anchor 38, so as to form a temporary restraint cable system. The structure of the repeatable tensioning anchor 38 belongs to the prior art, and will not be described here for the sake of space. In addition, in the present embodiment, the shoulder beam 34 further includes an anchor plate 36 , which is padded between the repeatable tensioning anchor 38 and the mounting plate 341 .

[0041] S3, when the steel tube concrete arch rib 20 is rotated or lifted, the temporary cable 37 is tensioned by a jack to form a horizontal constraint force to achieve the purpose of controlling the arch rib line shape and posture. When in use, the temporary external cable system 30 generates internal force after tensioning, and transmits the internal force to the steel tube concrete arch rib 20 through the shoulder beam 34 and the base 32, so that a longitudinal horizontal constraint is formed inside the arch rib. During the rotation and lifting construction, the steel tube concrete arch rib 20 will be separated from the arch rib low-position assembly bracket 10. At this time, the temporary constraint cable system can ensure that the longitudinal horizontal constraint of the arch rib is controllable and adjustable, maintain the arch rib construction line shape, and ensure the correct posture of the steel tube concrete arch rib 20 in the next step of construction.

[0042] Compared with the conventional technology that uses the hanger hole as the anchor point of the temporary cable 37, the temporary external cable system setting method during the rotation or lifting construction of the above-mentioned steel tube concrete arch rib arranges the temporary cable 37 on the outside of the horizontal projection of the steel tube concrete arch rib 20 through the mounting seat 31, so that it will not interfere with the arch rib low-position assembly bracket 10, and then in the early assembly process of the arch rib small segments, the arch rib low-position assembly bracket 10 can avoid using a separate design, thereby improving construction safety and reducing the impact on the arch rib installation positioning; at the same time, the internal force load received by the temporary cable 37 during work can be transmitted to the arch rib through the mounting seat 31, so that the stress on the arch rib is dispersed, which is beneficial to improving the safety of the structure. In addition, the present embodiment sets the mounting seat 31 at the intersection of the corresponding lower chord 23, lower tie rod 27 and web 29, which can transfer the internal force load received by the temporary cable 37 during operation to the lower chord 23, lower tie rod 27 and web 29 of the arch rib through the mounting seat 31, so that the stress received by the arch rib is more dispersed, which is beneficial to the safety of the structure.

[0043] In this embodiment, each base 32 includes two support plates 321, two groups of ribs 322 and a fixed plate 323, wherein the support plates 321 are the main force-bearing components, the ribs 322 are the secondary force-bearing components, and the ribs 322 also provide stability support for the support plates 321; the fixed plate 323 serves as the contact surface between the base 32 and the shoulder beam 34.

[0044] In this embodiment, the shoulder beam 34 is a box beam structure formed by assembling two mounting plates 341 and two webs 343, which is used to bear the load generated by the tensioning of the temporary external cable system 30. The mounting plate 341 is provided with an opening for the temporary external cable system 30 to pass through the box beam structure. Reinforcing plate assemblies 35 are arranged on both sides of the opening to enhance the local stability of the box beam structure. The temporary external cable system 30 is anchored to the shoulder beam 34 by a repeatable tensioning anchor 38, and an anchor pad 36 is provided at the anchoring point to enhance the local stability.

[0045] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A method for setting up a temporary external cable system when a steel tube concrete arch rib is rotated or lifted, characterized in that: The following steps are involved: S1, building a low-position assembly bracket for arch ribs, assembling arch rib segments on the low-position assembly bracket for arch ribs, and obtaining a steel tube concrete arch rib; S2, installing a temporary external cable system on the steel tube concrete arch rib: the temporary external cable system includes two mounting seats and two temporary cables, the two mounting seats are respectively fixed to the opposite ends of the steel tube concrete arch rib, the two temporary cables are respectively arranged on the opposite sides of the steel tube concrete arch rib, and are arranged outside the horizontal projection of the steel tube concrete arch rib and the horizontal projection of the arch rib low-position assembly bracket, and the two ends of each temporary cable are respectively connected to the two mounting seats; S3, when the steel tube concrete arch rib is rotated or lifted, the temporary cable is tensioned by a jack to form a horizontal restraining force, so as to achieve the purpose of controlling the line shape and posture of the arch rib.

2. The method for setting up a temporary external cable system when the steel tube concrete arch rib is rotated or lifted as claimed in claim 1, characterized in that: The mounting seat includes two bases and a shoulder pole beam, the two bases are respectively fixed on the opposite sides of the steel tube concrete arch rib along the transverse direction, the shoulder pole beam is parallel to the transverse direction and fixedly connected to the two bases, and the opposite ends of the shoulder pole beam extend to the outside of the opposite sides of the steel tube concrete arch rib along the transverse direction; one end of the two temporary cables is respectively connected to the opposite ends of the shoulder pole beam of one of the mounting seats, and the other ends of the two temporary cables are respectively connected to the opposite ends of the shoulder pole beam of the other mounting seat.

3. The method for setting up a temporary external cable system when the steel tube concrete arch rib is rotated or lifted as claimed in claim 2, characterized in that: The base includes two support plates, two groups of rib plates and a fixed plate. The two support plates are spaced apart along the transverse direction of the bridge. The bottom of each support plate is fixedly connected to the steel tube concrete arch rib. The two groups of rib plates are respectively arranged on the two support plates and are located on the side of the corresponding support plate facing away from the other support plate. Each rib plate is fixedly connected to the corresponding support plate and the steel tube concrete arch rib; the fixed plate is fixedly connected to the two groups of rib plates and the tops of the two support plates; the shoulder beam is fixedly connected to the fixed plates of the two bases.

4. The method for setting up a temporary external cable system when the steel tube concrete arch rib is rotated or lifted as claimed in claim 2, characterized in that: The shoulder pole beam includes two mounting plates, two webs and a number of partitions. The two mounting plates are arranged in parallel and at intervals, one of the mounting plates is fixedly connected to the two bases, the two webs are respectively arranged on the opposite sides of the mounting plates, and each web is fixedly connected to the two mounting plates; a number of partitions are arranged at intervals along the length direction of the mounting plates, and each partition is fixedly connected to the two mounting plates and the two webs; the temporary rope is passed through and fixed on the two mounting plates.

5. The method for setting up a temporary external cable system when the steel tube concrete arch rib is rotated or lifted as claimed in claim 4, characterized in that: The mounting plate is provided with mounting holes, and the temporary cable is passed through the mounting holes on the two mounting plates. After the temporary cable is tensioned by a jack, a repeatable tensioning anchor is used to fix the temporary cable to the mounting plate of the shoulder beam.

6. The method for setting up a temporary external cable system when the steel tube concrete arch rib is rotated or lifted as claimed in claim 5, characterized in that: The shoulder beam also includes an anchor plate, which is arranged between the repeatable tensioning anchor and the mounting plate.

7. The method for setting up a temporary external cable system when the steel tube concrete arch rib is rotated or lifted as claimed in claim 5, characterized in that: The two mounting plates and the two webs are arranged to form a cavity, and the partition is fixed in the cavity; the shoulder beam also includes two pairs of reinforcing plate assemblies, and the two pairs of reinforcing plate assemblies are respectively arranged at the two mounting holes, and each pair of reinforcing plate assemblies are respectively arranged on the opposite sides of the corresponding mounting holes, and the reinforcing plate assemblies are fixed in the cavity.

8. The method for setting up a temporary external cable system when the steel tube concrete arch rib is rotated or lifted as claimed in claim 7, characterized in that: The reinforcing plate assembly includes a vertical plate and two horizontal plates, the vertical plate is parallel to the web plate, and the opposite ends of the vertical plate are respectively fixedly connected to the two mounting plates; the two horizontal plates are respectively arranged on the opposite sides of the vertical plate, and each horizontal plate is vertically connected to the vertical plate and the mounting plate on the corresponding side.

9. The method for setting up a temporary external cable system when the steel tube concrete arch rib is rotated or lifted as claimed in claim 1, characterized in that: The steel tube concrete arch rib includes two upper chords arranged oppositely, two lower chords arranged oppositely, an upper connecting rod connecting the two upper chords, a lower connecting rod connecting the two lower chords, and a web connecting the upper chord and the lower chord. The two mounting seats are respectively connected to the two lower chords and are located at the intersection of the corresponding lower chord, the lower connecting rod and the web.

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