Suspender bridge catwalk cable transfer saddle structure assembly

Abstract

This invention belongs to the field of suspension bridge catwalk construction technology, specifically relating to a suspension bridge catwalk cable saddle structure assembly. The invention includes at least a main cable saddle grid reaction frame, a tower top gantry, second cable saddles, and a suspension bridge catwalk; two sets of main cable saddle grid reaction frames are arranged on the left and right sides; four second cable saddles are provided, symmetrically arranged on both sides of the suspension bridge catwalk and connected to the gantry column bases of the tower top gantry; each second cable saddle includes a second cable saddle support and a second cable saddle body, the second cable saddle body being connected to the column base of the tower top gantry via the second cable saddle support; it also includes two first cable saddles; the two first cable saddles are symmetrically arranged on both sides of the suspension bridge catwalk and respectively connected to the outer sides of the two main cable saddle grid reaction frames. This invention overcomes the horizontal force difference during operation when the main cable saddle pre-deflection is large, ensuring the catwalk alignment matches the main cable alignment, facilitating main cable construction.

Description

Technical Field

[0001] This invention belongs to the field of suspension bridge catwalk construction technology, specifically relating to a suspension bridge catwalk cable saddle structure assembly. Background Technology

[0002] For the construction of the superstructure of long-span suspension bridges, the main cable saddle, as a crucial structural element, serves as the support point, stress inflection point, and positioning adjustment mechanism for the main cable at the tower top, playing a vital role in the bridge's stability. In the completed bridge state, the saddle position is fixed to ensure the main tower's verticality. However, during construction, the main cable is only subjected to its own weight, and it cannot slide within the saddle; that is, the stress-free length of the main cable remains constant across each span. To ensure the main tower's verticality, i.e., equal horizontal forces on both sides, the saddle must be appropriately moved. This is achieved by altering the horizontal distance between the vertices of the saddles in each span, i.e., by setting a pre-offset for the main cable saddle.

[0003] As the span of suspension bridges increases, the design pre-deflection of the main cable saddle also varies. For bridges with large design pre-deflection, the distance between the saddle and the catwalk of the superstructure construction platform also increases. To facilitate the construction of the main cable, the distance between the catwalk and the main cable needs to be reduced. For the design and construction application of conventional catwalk systems, four sets of cable saddles at the base of the gantry column at the top of the tower are sufficient to meet the construction requirements. However, when the pre-deflection of the main cable saddle is too large, the distance between the catwalk and the main cable is too far. How to enable the bridge site construction for the main cable erection by the workers on the catwalk is a construction organization problem that needs to be overcome. Summary of the Invention

[0004] This invention provides a catwalk saddle structure assembly for suspension bridges. One objective is to provide a way to achieve parallelism between the catwalk and the main cable alignment even when the main cable saddle pre-deflection is too large. Another objective is to provide a way to support the catwalk for the superstructure operation platform during both the main cable construction and the steel box girder erection stages.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A suspension bridge catwalk cable-saddle structure assembly includes at least a main cable saddle grid reaction frame, a tower top gantry, a second cable-saddle, and a suspension bridge catwalk. Two main cable saddle grid reaction frames are arranged on the left and right sides. Four second cable-saddles are provided, each divided into two groups, symmetrically arranged on both sides of the suspension bridge catwalk and connected to the gantry column bases of the tower top gantry. Each second cable-saddle includes a second cable-saddle support and a second cable-saddle body, the second cable-saddle body being connected to the column bases of the tower top gantry via the second cable-saddle support. The assembly also includes two first cable-saddles, symmetrically arranged on both sides of the suspension bridge catwalk and respectively connected to the outer sides of the two main cable saddle grid reaction frames.

[0007] The first cable saddle includes a cable saddle support bracket, a first cable saddle support seat, and a first cable saddle body; the first cable saddle body is connected to the cable saddle support bracket via the first cable saddle support seat; the cable saddle support bracket is fixedly connected to the main cable saddle grid reaction frame.

[0008] It also includes a transverse connecting beam; the transverse connecting beam is connected between the inner sides of the two main cable saddle grid reaction frames and is set relative to the cable saddle support bracket; the transverse connecting beam is a hollow columnar structure surrounded by four connecting beam steel plates.

[0009] The cable saddle support bracket includes a second base plate, an inclined brace, and a horizontal brace; the second base plate is horizontally connected to the bottom surface of the inclined brace; the horizontal brace is connected to the top surface of the inclined brace; the second base plate and the horizontal brace are connected to the main cable saddle grid reaction frame.

[0010] The diagonal brace includes two support plates and two side plates; the support plates are rectangular steel plates; the side plates are trapezoidal steel plates; the two side plates and the two support plates form a hollow structure with a trapezoidal axial section; the top surface of the diagonal brace is a horizontal plane, which is connected to the horizontal brace; a second stiffening plate connects the two support plates.

[0011] The horizontal support includes a first top plate, a first stiffening plate, and a first bottom plate; the first top plate and the first bottom plate are arranged horizontally above and below each other; multiple first stiffening plates are provided, and the multiple first stiffening plates are vertically connected between the first top plate and the first bottom plate.

[0012] The first cable saddle support includes a vertical plate, a third bottom plate, a third stiffening plate, a partition plate, and a second top plate; the second top plate and the third bottom plate are horizontally arranged vertically; multiple vertical plates are provided, arranged in parallel, and vertically connected between the third bottom plate and the second top plate; multiple partition plates are connected between two adjacent vertical plates, and the partition plates are perpendicular to the vertical plates and the third bottom plate; the two outer vertical plates are respectively connected to the third stiffening plates; the upper end of the partition plate is an arc shape that matches the saddle body of the first cable saddle.

[0013] The first cable saddle body includes a cable saddle pressure plate, an arc plate, and clamping bolts; the arc plate is an integral structure composed of a horizontal plate and an arc plate, and the arc plate is horizontally connected to the first cable saddle support; the cable saddle pressure plate is connected to the horizontal plate of the arc plate by clamping bolts.

[0014] The upper part of the radial section of the cable saddle pressure plate is rectangular and the lower part is trapezoidal, and a semi-circular groove is opened in the middle of the trapezoidal part; on the surface of the cable saddle pressure plate, there are multiple bolt holes perpendicular to the plate surface, symmetrically opened on both sides of the semi-circular groove.

[0015] Beneficial effects:

[0016] (1) Based on the large pre-deflection of the main cable saddle of the suspension bridge, the present invention uses the reaction frame at the grid as the basis of the cable saddle structure assembly, adds the first cable saddle at the grid, and works together with the second cable saddle conventionally set at the column foot to ensure that the catwalk alignment is consistent with the main cable alignment, and the distance between the two is convenient for the main cable construction.

[0017] (2) This invention uses a first and a second saddle, installed at the main cable saddle grid reaction frame and the tower top gantry column base, to bear the vertical component of the catwalk load-bearing cable. The first saddle is used during the main cable erection and is removed during the steel box girder erection after the catwalk is repositioned. The second saddle then supports the catwalk. The adjustment of the catwalk saddle involves setting two 50t pulley blocks on the tower top gantry and winding them around four lines. These blocks are connected to the upper displacement beam on the side span of the catwalk. After the catwalk load-bearing cable at the saddle position on the grid reaction frame is relaxed, the saddle pressure plate is released and the saddle and supporting bracket are removed. The catwalk load-bearing cable is then slowly relaxed to its natural state, completing the conversion of the catwalk tower top saddle.

[0018] (3) The present invention overcomes the problem of horizontal force difference during operation by using the cable saddle pressure plate, arc plate and clamping bolt on the first cable saddle.

[0019] (4) This invention realizes the alignment control of the catwalk under the constraint of large pre-deflection of the main cable saddle, meets the requirements of the catwalk alignment and position at different stages of main cable erection and steel box girder construction, and broadens the design and construction technology of the catwalk to cable saddle structure assembly of suspension bridge.

[0020] (5) This invention is highly practical, safe, and efficient in construction. It is worth promoting and applying it further in the design and construction of catwalk cable saddles for similar long-span suspension bridges in the future.

[0021] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a front view of the structural assembly of the present invention;

[0024] Figure 2 This is a top view of the structural assembly of the present invention;

[0025] Figure 3 This is a left or right view of the main cable saddle pillar foot section cable saddle structure assembly;

[0026] Figure 4 This is a left or right view of the main cable saddle grid and the cable saddle structure assembly.

[0027] Figure 5 This is a front view of the cable saddle structure at the main cable saddle grid reaction frame;

[0028] Figure 6 This is a top view of the cable saddle structure at the main cable saddle grid reaction frame;

[0029] Figure 7 It is a left or right view of the cable saddle structure at the main cable saddle grid reaction frame;

[0030] Figure 8 This is the main view of the cable saddle structure at the base of the tower's portal frame;

[0031] Figure 9 This is a top view of the cable saddle structure at the base of the tower's portal frame;

[0032] Figure 10 It is a left or right view of the cable saddle structure at the base of the tower top portal frame;

[0033] Figure 11 This is the main view of the cable saddle support bracket structure at the main cable saddle grid reaction frame;

[0034] Figure 12 This is a top view of the cable saddle support bracket structure at the main cable saddle grid reaction frame;

[0035] Figure 13 This is a left or right view of the cable saddle support bracket structure at the main cable saddle grid reaction frame;

[0036] Figure 14 This is the main view of the transverse connecting beam structure of the main cable saddle grid reaction frame;

[0037] Figure 15 It is a left or right view of the transverse connecting beam structure of the main cable saddle grid reaction frame;

[0038] Figure 16 This is the main view of the cable saddle support structure at the main cable saddle grid reaction frame;

[0039] Figure 17 This is a top view of the cable saddle support structure at the main cable saddle grid reaction frame;

[0040] Figure 18 This is a left or right view of the cable saddle support structure at the main cable saddle grid reaction frame;

[0041] Figure 19 This is a front view of the main cable saddle structure at the main cable saddle grid reaction frame;

[0042] Figure 20 This is a top view of the saddle body structure of the cable saddle at the main cable saddle grid reaction frame;

[0043] Figure 21 It is a left or right view of the saddle body structure of the cable saddle at the main cable saddle grid reaction frame;

[0044] Figure 22 This is a front view of the pressure plate structure of the present invention;

[0045] Figure 23 This is a top view of the pressure plate structure of the present invention;

[0046] Figure 24 This is a left or right view of the pressure plate structure of the present invention.

[0047] In the diagram: 1. Cable saddle support bracket; 2. Transverse connecting beam; 3. First cable saddle support seat; 4. First cable saddle body; 5. Second cable saddle support seat; 6. Second cable saddle body; 7. Cable saddle pressure plate; 8. Tightening bolt; 9. Grating; 10. First cable saddle; 11. Second cable saddle; 12. Main cable; 13. Main cable saddle grating reaction frame; 14. Catwalk load-bearing cable; 15. Gantry column; 16. Gantry column base; 17. Main cable saddle; 18. First top plate; 19. First stiffening plate; 20. First bottom plate; 21. Support plate; 22. Side plate; 23. Second bottom plate; 24. Second stiffening plate; 25. Connecting beam steel plate; 26. Vertical plate; 27. Third bottom plate; 28. Third stiffening plate; 29. ​​Partition plate; 30. Second top plate; 31. Arc plate; 32. Bolt hole. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0049] Example 1:

[0050] according to Figures 1-24The diagram shows a suspension bridge catwalk cable saddle assembly, comprising at least a main cable saddle grid reaction frame 13, a tower top gantry, second cable saddles 11, and a suspension bridge catwalk. Two main cable saddle grid reaction frames 13 are arranged on the left and right sides. Four second cable saddles 11 are provided, each divided into two groups. These two groups of second cable saddles 11 are symmetrically arranged on both sides of the suspension bridge catwalk and connected to the gantry column bases 16 of the tower top gantry. Each second cable saddle 11 includes a second cable saddle support 5 and a second cable saddle body 6, the second cable saddle body 6 being connected to the column base of the tower top gantry via the second cable saddle support 5. The assembly also includes first cable saddles 10. Two first cable saddles 10 are provided. The two first cable saddles 10 are symmetrically arranged on both sides of the suspension bridge catwalk and respectively connected to the outer sides of the two main cable saddle grid reaction frames 13.

[0051] In practical use, the design of the second cable saddle 11 and the first cable saddle 10 enables the continuous passage of the three-span continuous catwalk load-bearing cable 14 through the tower top. To accommodate the parallel alignment of the main cable 12, resolve conflicts with the main cable saddle 17, and address issues such as the large pre-deflection of the main cable saddle, catwalk cable saddles are installed at both the main cable saddle grid reaction frame 13 and the tower top portal frame column base 16. This ensures that the catwalk alignment remains consistent with the main cable 12 alignment, achieving alignment control of the catwalk under the constraint of the large pre-deflection of the main cable saddle 17. This satisfies the requirements for catwalk alignment and position at different stages of main cable 12 erection and steel box girder construction, broadens the design and construction technology of the catwalk cable saddle structure assembly for suspension bridges, demonstrates strong practicality, reliable safety performance, and high construction efficiency, and is worthy of further promotion and application in the design and construction of similar large-span suspension bridge catwalk cable saddles in the future.

[0052] In this embodiment, the second saddle support 5 and the second saddle body 6 in the second saddle 11 have the same structure as the first saddle support 3 and the first saddle body 4 in the first saddle 10.

[0053] In practical applications, the second cable saddle support 5 is connected and fixed at the gantry column foot 16 of the gantry column 15, and is located on the inner side of the gantry column 15 near the main cable saddle 17.

[0054] Example 2:

[0055] according to Figure 1 , Figure 2 , Figures 4-7 , Figures 11-24 The suspension bridge catwalk cable-saddle structure assembly shown differs from Embodiment 1 in that: the first cable-saddle 10 includes a cable-saddle support bracket 1, a first cable-saddle support seat 3, and a first cable-saddle saddle body 4; the first cable-saddle saddle body 4 is connected to the cable-saddle support bracket 1 via the first cable-saddle support seat 3; the cable-saddle support bracket 1 is fixedly connected to the main cable saddle grid reaction frame 13.

[0056] Furthermore, it also includes a transverse connecting beam 2; the transverse connecting beam 2 is connected between the inner sides of the two main cable saddle grid reaction frames 13 and is set relative to the cable saddle support bracket 1; the transverse connecting beam 2 is a hollow columnar structure surrounded by four connecting beam steel plates 25.

[0057] In actual use, the first saddle 10 is fixedly connected to the main saddle grid reaction frame 13 through the saddle support bracket 1. Through the cooperation of the first saddle 10 and the second saddle 11, the three-span continuous catwalk load-bearing cable 14 can continuously pass through the top of the tower. In order to adapt to the parallelism between the alignment and the alignment of the main cable 12, solve the conflict with the main saddle 17, and solve the problem of the large pre-deflection of the main saddle 17, the first saddle 10 is fixedly connected to the main saddle grid reaction frame 13 through the saddle support bracket 1.

[0058] The installation of transverse connecting beam 2 further ensures stability and safety.

[0059] Example 3:

[0060] according to Figures 4-7 , Figures 11-13 The suspension bridge catwalk cable-saddle structure assembly shown differs from Embodiment 2 in that: the cable-saddle support bracket 1 includes a second base plate 23, an inclined brace, and a horizontal brace; the second base plate 23 is horizontally connected to the bottom surface of the inclined brace; the horizontal brace is connected to the top surface of the inclined brace; the second base plate 23 and the horizontal brace are connected to the main cable saddle grid reaction frame 13.

[0061] Furthermore, the diagonal brace includes two support plates 21 and two side plates 22; the support plates 21 are rectangular steel plates; the side plates 22 are trapezoidal steel plates; the two side plates 22 and the two support plates 21 form a hollow structure with a trapezoidal axial section; the top surface of the diagonal brace is a horizontal plane, which is connected to the horizontal brace; a second stiffening plate 24 is connected between the two support plates 21.

[0062] Furthermore, the horizontal support includes a first top plate 18, a first stiffening plate 19, and a first bottom plate 20; the first top plate 18 and the first bottom plate 20 are arranged horizontally above and below each other; multiple first stiffening plates 19 are provided, and multiple first stiffening plates 19 are vertically connected between the first top plate 18 and the first bottom plate 20.

[0063] In practical use, the above-mentioned technical solution is adopted for the cable saddle support bracket 1, which not only makes the connection of the first cable saddle 10 more stable, but also reduces its weight by making the cable saddle support bracket 1 hollow. This not only ensures safety, but also reduces costs.

[0064] In practical applications, the lower part of the diagonal brace in the cable saddle support bracket 1 is connected to the lower side of the grid 9 on the main cable saddle grid reaction frame 13. The cable saddle support bracket 1 adopts the above-mentioned technical solution, enabling a good connection between the cable saddle support bracket 1 and the main cable saddle grid reaction frame 13.

[0065] Example 4:

[0066] according to Figure 4 , Figure 5 , Figure 7 , Figures 16-21 The suspension bridge catwalk cable-stayed saddle assembly shown differs from Embodiment 2 in that: the first cable-stayed saddle support 3 includes a vertical plate 26, a third bottom plate 27, a third stiffening plate 28, a partition plate 29, and a second top plate 30; the second top plate 30 and the third bottom plate 27 are horizontally arranged vertically; multiple vertical plates 26 are provided, arranged in parallel, and vertically connected between the third bottom plate 27 and the second top plate 30; multiple partition plates 29 are connected between two adjacent vertical plates 26, and the partition plates 29 are perpendicular to the vertical plates 26 and the third bottom plate 27; the outermost two vertical plates 26 are respectively connected to the third stiffening plates 28; the upper end of the partition plate 29 is an arc shape matching the first cable-stayed saddle body 4.

[0067] In actual use, the first cable saddle support 3 is organically composed of the vertical plate 26, the third bottom plate 27, the third stiffening plate 28, the partition plate 29, and the second top plate 30, which not only provides a stable connection for the first cable saddle body 4, but also makes the connection with the cable saddle support bracket 1 more convenient.

[0068] In practical applications, the connection between the vertical plate 26, the third bottom plate 27, the third stiffening plate 28, the partition plate 29, and the second top plate 30 is achieved by welding, which ensures good stability and safety.

[0069] Example 5:

[0070] according to Figures 5-8 , Figure 10 , Figures 19-24 The suspension bridge catwalk cable-saddle structure assembly shown differs from Embodiment 2 in that: the first cable-saddle body 4 includes a cable-saddle pressure plate 7, an arc plate 31, and clamping bolts 8; the arc plate 31 is an integral structure composed of a horizontal plate and an arc plate, which is horizontally connected to the first cable-saddle support 3; the cable-saddle pressure plate 7 is connected to the horizontal plate of the arc plate 31 by clamping bolts 8.

[0071] In actual use, the first cable saddle body 4 adopts the above-mentioned technical solution, which can effectively lift and erect the main cable 12. By connecting the cable saddle pressure plate 7 to the arc plate 31 through the clamping bolts 8, the main cable 12 can be clamped, effectively overcoming the difference in horizontal force during operation.

[0072] Example 6:

[0073] according to Figure 6 , Figure 8 , Figure 10 , Figures 22-24 The cable-stayed bridge catwalk cable-stayed saddle structure assembly shown differs from Embodiment 5 in that: the upper part of the radial cross-section of the cable-stayed saddle pressure plate 7 is rectangular and the lower part is trapezoidal, and a semi-circular groove is opened in the middle of the trapezoid; on the plate surface of the cable-stayed saddle pressure plate 7, and on both sides of the semi-circular groove, there are multiple bolt holes 32 perpendicular to the plate surface.

[0074] In actual use, the cable saddle pressure plate 7 adopts the above-mentioned technical solution, which can easily clamp the main cable 12 and overcome the problem of horizontal force difference during operation.

[0075] Example 7:

[0076] according to Figures 1-24The suspension bridge catwalk cable-saddle structure assembly shown differs from Embodiment 1 in that: the first cable-saddle 10 includes a cable-saddle support bracket 1, a transverse connecting beam 2, a first cable-saddle support seat 3, and a first cable-saddle saddle body 4; the first cable-saddle saddle body 4 is connected to the cable-saddle support bracket 1 via the first cable-saddle support seat 3; the cable-saddle support bracket 1 is fixedly connected to the main cable saddle grid reaction frame 13; the transverse connecting beam 2 connects the inner sides of the two main cable saddle grid reaction frames 13 and is positioned relative to the cable-saddle support bracket 1; the transverse connecting beam 2 is a hollow columnar structure formed by four connecting beam steel plates 25; the cable-saddle support bracket 1 includes a second base plate 23. The diagonal brace and the horizontal brace; the second base plate 23 is horizontally connected to the bottom surface of the diagonal brace; the horizontal brace is connected to the top surface of the diagonal brace; the second base plate 23 and the horizontal brace are connected to the main cable saddle grid reaction frame 13; the diagonal brace includes two support plates 21 and two side plates 22; the support plates 21 are rectangular steel plates; the side plates 22 are trapezoidal steel plates; the two side plates 22 and the two support plates 21 form a hollow structure with a trapezoidal axial section; the top surface of the diagonal brace is a horizontal plane, which is connected to the horizontal brace; a second stiffening plate 24 is connected between the two support plates 21; the horizontal brace includes a first top plate 18, a first stiffening plate 19 and a first base plate 20; the first top plate 18 and The first base plate 20 is horizontally arranged vertically; multiple first stiffening plates 19 are provided, and the multiple first stiffening plates 19 are vertically connected between the first top plate 18 and the first base plate 20; the first cable saddle support 3 includes a vertical plate 26, a third base plate 27, a third stiffening plate 28, a partition plate 29, and a second top plate 30; the second top plate 30 and the third base plate 27 are horizontally arranged vertically; multiple vertical plates 26 are provided, and the multiple vertical plates 26 are arranged in parallel, and the multiple vertical plates 26 are vertically connected between the third base plate 27 and the second top plate 30; multiple partition plates 29 are connected between two adjacent vertical plates 26, and the partition plates 29 are perpendicular to the vertical plates 26 and the third base plate 27; located on the outermost two vertical plates 26 Each is connected to a third stiffening plate 28; the upper end of the partition plate 29 is an arc shape matching the first cable saddle body 4; the first cable saddle body 4 includes a cable saddle pressure plate 7, an arc plate 31, and clamping bolts 8; the arc plate 31 is an integral structure composed of a horizontal plate and an arc plate, and the arc plate is horizontally connected to the first cable saddle support 3; the cable saddle pressure plate 7 is connected to the horizontal plate of the arc plate 31 by clamping bolts 8; the upper part of the radial section of the cable saddle pressure plate 7 is rectangular and the lower part is trapezoidal, and a semi-circular groove is opened in the middle of the trapezoid; on the plate surface of the cable saddle pressure plate 7, and on both sides of the semi-circular groove, there are multiple bolt holes 32 perpendicular to the plate surface.

[0077] In actual use, the catwalk load-bearing cable saddle at the top of the tower is installed at the main cable saddle grid reaction frame and the tower top gantry column base to bear the vertical component of the catwalk load-bearing cable 14. The first cable saddle 10 on the grid reaction frame is used during the erection of the main cable 12 and is removed during the erection of the steel box girder after the catwalk is repositioned. The catwalk is then supported by the second cable saddle 11 at the tower top gantry column base. The adjustment of the catwalk cable saddle involves setting up two 50t pulley blocks on the tower top gantry and winding them around line 4, connecting them to the upper displacement beam on the side span of the catwalk. After the catwalk load-bearing cable 14 at the position of the cable saddle on the grid reaction frame is relaxed, the cable saddle pressure plate 7 is released and the first cable saddle body 4 and cable saddle support bracket 1 are removed. The catwalk load-bearing cable 14 is then slowly relaxed to its natural state, completing the conversion of the catwalk tower top cable saddle.

[0078] The working principle of this invention: During the actual construction design of the cable-stayed bridge site, considering the large pre-deflection and the harmony between the main cable 12 and the catwalk alignment, a first cable-stayed saddle 10 is added at the grid, which together with the conventional second cable-stayed saddle 11 forms a cable-stayed saddle structure assembly, satisfying the control of the catwalk alignment at different stages of the main cable 12 erection and the steel box girder erection.

[0079] In practical applications, factors such as the tension, angle, and distance from the center of the main tower of the catwalk cable saddle set on the grid are comprehensively considered. The stress analysis is carried out under the most unfavorable condition, and the stress of the grid top pusher is verified.

[0080] This invention is based on a structural system where the pre-deflection of the suspension bridge is too large, and the alignment of the catwalk and the main cable 12 differs significantly. Using this invention, the construction organization of the catwalk alignment can be optimized during the main cable 12 construction and steel box girder erection stages. Specifically, the catwalk load-bearing cable saddle at the top of the tower is set at the main cable saddle grid reaction frame 13 and the tower top portal frame column base, bearing the vertical component of the catwalk load-bearing cable 14. The first cable saddle 10 on the grid reaction frame is used during the main cable 12 erection and is removed during the steel box girder erection after the catwalk is repositioned. The second cable saddle at the tower top portal frame column base then supports the catwalk. Under the constraints of excessive pre-deflection of the main cable saddle 17 and the significant difference between the alignment of the main cable 12 and the catwalk, this invention simplifies the process, reduces investment, shortens the construction period, and ensures safe and efficient construction. It is highly practical and worthy of further promotion in the future design and construction of catwalk cable saddle structures, broadening new ideas for cable saddle design and construction methods.

[0081] Where there is no conflict, those skilled in the art can combine the relevant technical features in the above examples according to the actual situation to achieve the corresponding technical effects. Specific details of the various combinations will not be elaborated here.

[0082] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0083] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0084] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent variations, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the present invention.

Claims

1. A suspension bridge catwalk cable saddle structure assembly, comprising at least a main cable saddle grid reaction frame (13), a tower top gantry, a second cable saddle (11), and a suspension bridge catwalk; wherein two sets of the main cable saddle grid reaction frames (13) are arranged on the left and right; four second cable saddles (11) are provided, each of the four second cable saddles (11) being divided into two groups, the two groups of second cable saddles (11) being symmetrically arranged on both sides of the suspension bridge catwalk and connected to the gantry column base (16) of the tower top gantry; wherein the second cable saddle (11) comprises a second cable saddle support (5) and a second cable saddle body (6), the second cable saddle body (6) being connected to the column base of the tower top gantry through the second cable saddle support (5); characterized in that: It also includes a first cable saddle (10); two first cable saddles (10) are provided; the two first cable saddles (10) are symmetrically provided on both sides of the catwalk of the suspension bridge and are respectively connected to the outside of the two main cable saddle grid reaction frames (13).

2. The suspension bridge catwalk cable-saddle structure assembly as described in claim 1, characterized in that: The first cable saddle (10) includes a cable saddle support bracket (1), a first cable saddle support seat (3), and a first cable saddle body (4); the first cable saddle body (4) is connected to the cable saddle support bracket (1) through the first cable saddle support seat (3); the cable saddle support bracket (1) is fixedly connected to the main cable saddle grid reaction frame (13).

3. The suspension bridge catwalk cable saddle structure assembly as described in claim 2, characterized in that: It also includes a transverse connecting beam (2); the transverse connecting beam (2) is connected between the inner sides of the two main cable saddle grid reaction frames (13) and is set relative to the cable saddle support bracket (1); the transverse connecting beam (2) is a hollow columnar structure formed by four connecting beam steel plates (25).

4. The suspension bridge catwalk cable saddle structure assembly as described in claim 2, characterized in that: The cable saddle support bracket (1) includes a second base plate (23), a diagonal brace and a horizontal brace; the second base plate (23) is horizontally connected to the bottom surface of the diagonal brace; the horizontal brace is connected to the top surface of the diagonal brace; the second base plate (23) and the horizontal brace are connected to the main cable saddle grid reaction frame (13).

5. The suspension bridge catwalk cable-saddle structure assembly as described in claim 4, characterized in that: The diagonal brace includes two support plates (21) and two side plates (22); the support plate (21) is a rectangular steel plate; the side plate (22) is a trapezoidal steel plate; the two side plates (22) and the two support plates (21) form a hollow structure with a trapezoidal axial section; the top surface of the diagonal brace is a horizontal plane, which is connected to the horizontal brace; a second stiffening plate (24) is connected between the two support plates (21).

6. The suspension bridge catwalk cable-saddle structure assembly as described in claim 4, characterized in that: The horizontal support includes a first top plate (18), a first stiffening plate (19), and a first bottom plate (20); the first top plate (18) and the first bottom plate (20) are arranged horizontally above and below each other; multiple first stiffening plates (19) are provided, and multiple first stiffening plates (19) are vertically connected between the first top plate (18) and the first bottom plate (20).

7. The suspension bridge catwalk cable-saddle structure assembly as described in claim 2, characterized in that: The first cable saddle support (3) includes a vertical plate (26), a third bottom plate (27), a third stiffening plate (28), a partition plate (29), and a second top plate (30); the second top plate (30) and the third bottom plate (27) are arranged horizontally above and below each other; multiple vertical plates (26) are provided, and the multiple vertical plates (26) are arranged in parallel and vertically connected between the third bottom plate (27) and the second top plate (30); multiple partition plates (29) are connected between two adjacent vertical plates (26), and the partition plates (29) are perpendicular to the vertical plates (26) and the third bottom plate (27); the outer sides of the two outermost vertical plates (26) are respectively connected to the third stiffening plates (28); the upper end of the partition plate (29) is an arc shape that matches the first cable saddle body (4).

8. The suspension bridge catwalk cable saddle structure assembly as described in claim 2, characterized in that: The first cable saddle body (4) includes a cable saddle pressure plate (7), an arc plate (31), and a clamping bolt (8); the arc plate (31) is an integral structure composed of a horizontal plate and an arc plate, and the arc plate is horizontally connected to the first cable saddle support (3); the cable saddle pressure plate (7) is connected to the horizontal plate of the arc plate (31) by the clamping bolt (8).

9. The suspension bridge catwalk cable saddle structure assembly as described in claim 8, characterized in that: The upper part of the radial section of the cable saddle pressure plate (7) is rectangular and the lower part is trapezoidal, and a semi-circular groove is opened in the middle of the trapezoidal section; on the plate surface of the cable saddle pressure plate (7), multiple bolt holes (32) perpendicular to the plate surface are symmetrically opened on both sides of the semi-circular groove.

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