Construction method for integral erection of catwalk bearing cable of suspension bridge

Abstract

The application is a construction method for integral erection of catwalk bearing cables of a suspension bridge, comprising the following steps: S1, placing a plurality of first catwalk bearing cable drums in front of a north anchor, drawing out first catwalk bearing cables on the first catwalk bearing cable drums, anchoring the first catwalk bearing cables on a first anchor beam in sequence, setting a first winch at the bottom of a north tower, and pulling the first anchor beam to the bottom of the north tower by the first winch; S2, placing a plurality of second catwalk bearing cable drums in front of a south anchor, drawing out second catwalk bearing cables on the second catwalk bearing cable drums, anchoring the second catwalk bearing cables on a second anchor beam in sequence, setting a second winch at the bottom of a south tower, and pulling the second anchor beam to the bottom of the south tower by the second winch. The application does not need to lay a reciprocating pulling system, the catwalk bearing cables are erected at a high speed, the construction efficiency is high, and the construction period can be significantly shortened.

Description

Technical Field

[0001] This invention relates to the field of suspension bridge construction technology, and in particular to a construction method for the integral erection of the load-bearing cables of the catwalk of a suspension bridge. Background Technology

[0002] Suspension bridges are widely used due to their large span capacity, strong earthquake resistance, and good adaptability to terrain. Catwalks are important aerial walkways and work platforms for the construction of the superstructure of suspension bridges, used for tasks such as main cable strand towing and erection, surveying, cable adjustment, main cable tightening, installation of cable clamps, sling installation, main cable winding, and protective coating. Based on the anchoring method of the catwalk's load-bearing cables, catwalks can be divided into continuous and separated types. Conventional suspension bridge catwalks typically have 4-10 load-bearing cables per span. During construction, a reciprocating traction system is often used for erection, but erecting the load-bearing cables one by one is inefficient and time-consuming. Summary of the Invention

[0003] The present invention aims to overcome the shortcomings of the prior art and provides a construction method for the overall erection of the load-bearing cables of the catwalk of a suspension bridge.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a construction method for integrally erecting the load-bearing cables of a suspension bridge catwalk, comprising the following steps:

[0005] S1. Place several first catwalk load-bearing cable reels in front of the north anchorage, pull out the first catwalk load-bearing cable from the first catwalk load-bearing cable reel, and anchor them sequentially to the first anchor beam. Set up the first winch at the bottom of the north tower and use the first winch to pull the first anchor beam to the bottom of the north tower.

[0006] S2. Place several second catwalk load-bearing cable reels in front of the south anchorage, pull out the second catwalk load-bearing cables from the second catwalk load-bearing cable reels, and anchor them sequentially to the second anchor beam. Set up a second winch at the bottom of the south tower and use the second winch to pull the second anchor beam to the bottom of the south tower.

[0007] S3. Place several third catwalk load-bearing cable reels on the pier top platform near the mid-span direction at the bottom of the north tower, pull out the third catwalk load-bearing cables from the third catwalk load-bearing cable reels, and anchor them sequentially to the third anchor beam. Place the third anchor beam on the tugboat and tow the third anchor beam to the bottom of the south tower.

[0008] S4. Release the third catwalk load-bearing cable at the third catwalk load-bearing cable disc, anchor it to the fourth anchor beam, and temporarily connect the first and fourth anchor beams to the top of the north tower's foundation on both sides, and temporarily connect the second and third anchor beams to the top of the south tower's foundation on both sides.

[0009] S5. Release the temporary connection between the north tower foundation and the first and fourth anchor beams, and the temporary connection between the south tower foundation and the second and third anchor beams. Use the gantry cranes located at the top of the north and south towers to lift the first, fourth, second, and third anchor beams respectively, and then lift them to the corresponding tower top positions.

[0010] S6. Temporarily fix the first anchor beam, the second anchor beam, the third anchor beam, and the fourth anchor beam. Symmetrically anchor the first catwalk load-bearing cable, the second catwalk load-bearing cable, and the third catwalk load-bearing cable on the north and south sides of the top of the north and south towers one by one. After the first catwalk load-bearing cable, the second catwalk load-bearing cable, and the third catwalk load-bearing cable are anchored, remove the first anchor beam, the second anchor beam, the third anchor beam, and the fourth anchor beam.

[0011] S7. Release the first catwalk load-bearing cable at the first catwalk load-bearing cable reel and anchor it to the first load-bearing cable anchoring bracket arranged at the top of the north anchorage. Release the second catwalk load-bearing cable at the second catwalk load-bearing cable reel and anchor it to the second load-bearing cable anchoring bracket arranged at the top of the south anchorage. Adjust the alignment of the first, second, and third catwalk load-bearing cables to complete the overall erection of the catwalk load-bearing cables.

[0012] Specifically, the number of the first catwalk load-bearing cable, the second catwalk load-bearing cable, and the third catwalk load-bearing cable shall not be less than four.

[0013] Specifically, the first, second, third, and fourth anchor beams are stiffened box girders or I-beam structures, and each of them is equipped with lifting points for traction and hoisting.

[0014] Specifically, there are two gantry cranes each at the top of the north and south towers.

[0015] Specifically, the first catenary support cable reel is arranged laterally in front of the north anchorage according to the spacing of the first catenary support cable; the second catenary support cable reel is arranged laterally in front of the south anchorage according to the spacing of the second catenary support cable; and the third catenary support cable reel is arranged laterally on the pier top platform near the mid-span direction at the bottom of the north tower according to the spacing of the third catenary support cable.

[0016] The beneficial effects of this invention are: it eliminates the need for a reciprocating traction system, allows for rapid erection of the catwalk load-bearing cable, improves construction efficiency, and significantly reduces the construction period. Attached Figure Description

[0017] Figure 1 This is a diagram of the catwalk load-bearing cable erection in S1 of the present invention;

[0018] Figure 2 This is a diagram of the catwalk load-bearing cable erection in S2 of the present invention;

[0019] Figure 3This is a diagram of the catwalk load-bearing cable erection in S3 of the present invention;

[0020] Figure 4 This is a diagram of the catwalk load-bearing cable erection in S4 of the present invention;

[0021] Figure 5 This is a diagram of the catwalk load-bearing cable erection in S5 of the present invention;

[0022] Figure 6 This is a diagram of the catwalk load-bearing cable erection in S6 of the present invention;

[0023] Figure 7 This is a diagram of the catwalk load-bearing cable erection in S7 of the present invention;

[0024] Figure 8 This is a schematic diagram showing the connection between the first catwalk load-bearing cable, the first catwalk load-bearing cable reel, and the first anchor beam of the present invention.

[0025] Figure 9 This is a schematic diagram showing the location of the lifting points in this invention;

[0026] In the diagram: 1-First catwalk load-bearing cable reel; 2-North anchorage; 3-First catwalk load-bearing cable; 401-First anchor beam; 402-Second anchor beam; 403-Third anchor beam; 404-Fourth anchor beam; 5-First winch; 6-Second catwalk load-bearing cable reel; 7-South anchorage; 8-Second catwalk load-bearing cable; 9-Second winch; 10-Third catwalk load-bearing cable reel; 11-Third catwalk load-bearing cable; 12-Tugboat; 13-Gantry crane; 14-First load-bearing cable anchor bracket; 15-Second load-bearing cable anchor bracket; 16-Lifting point;

[0027] The following will describe in detail, with reference to the accompanying drawings, embodiments of the present invention. Detailed Implementation

[0028] The present invention will be further described below with reference to embodiments:

[0029] like Figures 1-9 As shown, a construction method for the integral erection of the load-bearing cables of a suspension bridge catwalk includes the following steps:

[0030] S1. Place several first catwalk load-bearing cable reels 1 in front of the north anchorage 2, pull out the first catwalk load-bearing cables 3 from the first catwalk load-bearing cable reels 1, and anchor them sequentially to the first anchor beam 401. Set up the first winch 5 at the bottom of the north tower and use the first winch 5 to pull the first anchor beam 401 to the bottom of the north tower. When the first catwalk load-bearing cables 3 are pulled out, they should be immediately anchored to the first anchor beam 401 one by one.

[0031] S2. Place several second catwalk load-bearing cable reels 6 in front of the south anchorage 7, pull out the second catwalk load-bearing cables 8 from the second catwalk load-bearing cable reels 6, and anchor them sequentially to the second anchor beam 402. Set up a second winch 9 at the bottom of the south tower and use the second winch 9 to pull the second anchor beam 402 to the bottom of the south tower. When the second catwalk load-bearing cables 8 are pulled out, they should be immediately anchored to the second anchor beam 402 one by one.

[0032] S3. Place several third catwalk load-bearing cable reels 10 on the pier top platform near the mid-span direction at the bottom of the north tower. Pull out the third catwalk load-bearing cables 11 from the third catwalk load-bearing cable reels 10 and anchor them sequentially to the third anchor beam 403. Place the third anchor beam 403 on the tugboat 12 and tow the third anchor beam 403 to the bottom of the south tower. When the third catwalk load-bearing cables 11 are pulled out, they should be immediately anchored to the third anchor beam 403 one by one.

[0033] S4. Release the third catwalk load-bearing cable 11 at the third catwalk load-bearing cable disc 10 and anchor it to the fourth anchor beam 404. Temporarily connect the first anchor beam 401 and the fourth anchor beam 404 to the top of the north tower's foundation on both sides, and temporarily connect the second anchor beam 402 and the third anchor beam 403 to the top of the south tower's foundation on both sides. The overall erection of the catwalk load-bearing cable in steps S1, S2, and S3 is carried out simultaneously on their respective working faces.

[0034] S5. Release the temporary connection between the north tower foundation and the first anchor beam 401 and the fourth anchor beam 404, and the temporary connection between the south tower foundation and the second anchor beam 402 and the third anchor beam 403. Use the gantry cranes 13 arranged on the top of the north tower and the top of the south tower to lift the first anchor beam 401, the fourth anchor beam 404, the second anchor beam 402, and the third anchor beam 403 respectively, and then lift them to the corresponding tower top positions.

[0035] S6. Temporarily fix the first anchor beam 401, the second anchor beam 402, the third anchor beam 403, and the fourth anchor beam 404. Symmetrically anchor the first catwalk load-bearing cable 3, the second catwalk load-bearing cable 8, and the third catwalk load-bearing cable 11 one by one on both the north and south sides of the top of the north and south towers. After the first catwalk load-bearing cable 3, the second catwalk load-bearing cable 8, and the third catwalk load-bearing cable 11 are anchored, remove the first anchor beam 401, the second anchor beam 402, the third anchor beam 403, and the fourth anchor beam 404. When the catwalk load-bearing cables are anchored to the bridge towers, ensure that the catwalk load-bearing cables in the direction of the north tower in the north span and the direction of the south tower in the south span are symmetrically anchored one by one.

[0036] S7. Release the first catwalk load-bearing cable 3 at the first catwalk load-bearing cable reel 1 and anchor it to the first load-bearing cable anchoring bracket 14 arranged at the top of the north anchor 2. Release the second catwalk load-bearing cable 8 at the second catwalk load-bearing cable reel 6 and anchor it to the second load-bearing cable anchoring bracket 15 arranged at the top of the south anchor 7. Adjust the alignment of the first catwalk load-bearing cable 3, the second catwalk load-bearing cable 8, and the third catwalk load-bearing cable 11 to complete the overall erection of the catwalk load-bearing cables.

[0037] The number of the first catwalk load-bearing cable 3, the second catwalk load-bearing cable 8, and the third catwalk load-bearing cable 11 shall not be less than four. The first anchor beam 401, the second anchor beam 402, the third anchor beam 403, and the fourth anchor beam 404 shall be stiffened box girders or I-beam structures, and each of the first anchor beam 401, the second anchor beam 402, the third anchor beam 403, and the fourth anchor beam 404 shall be equipped with lifting points 16 for traction and hoisting.

[0038] There are two gantry cranes 13 each at the top of the north and south towers. In order to reduce the unbalanced force on the tower top, the gantry cranes 13 at the tower top simultaneously lift the first anchor beam 401, the second anchor beam 402, the third anchor beam 403, and the fourth anchor beam 404.

[0039] The first catenary support cable reel 1 is arranged laterally in front of the north anchorage 2 according to the spacing of the first catenary support cable 3. The second catenary support cable reel 6 is arranged laterally in front of the south anchorage 7 according to the spacing of the second catenary support cable 8. The third catenary support cable reel 10 is arranged laterally on the pier top platform near the mid-span direction at the bottom of the north tower according to the spacing of the third catenary support cable 11. The number of cable reels is the same as the number of support cables.

[0040] This invention enables the rapid erection of catwalk load-bearing cables and is applicable to the erection of any number of catwalk load-bearing cables. This invention eliminates the need for a reciprocating traction system, resulting in fast catwalk load-bearing cable erection, high construction efficiency, and a significant reduction in construction time.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] The present invention has been described above by way of example. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present invention, or direct application to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A construction method for integrally erecting the load-bearing cables of a suspension bridge catwalk, characterized in that, Includes the following steps: S1. Place several first catwalk load-bearing cable reels (1) in front of the north anchorage (2), pull out the first catwalk load-bearing cables (3) on the first catwalk load-bearing cable reels (1), and anchor them sequentially to the first anchor beam (401). Set up the first winch (5) at the bottom of the north tower and use the first winch (5) to pull the first anchor beam (401) to the bottom of the north tower. Among them, the number of first catwalk load-bearing cables (3) is not less than four. The first catwalk load-bearing cable reels (1) are arranged laterally in front of the north anchorage (2) according to the spacing of the first catwalk load-bearing cables (3). S2. Place several second catwalk load-bearing cable reels (6) in front of the south anchorage (7), pull out the second catwalk load-bearing cables (8) on the second catwalk load-bearing cable reels (6), and anchor them sequentially to the second anchor beam (402). Set up a second winch (9) at the bottom of the south tower and use the second winch (9) to pull the second anchor beam (402) to the bottom of the south tower. The number of second catwalk load-bearing cables (8) shall not be less than four. The second catwalk load-bearing cable reels (6) shall be arranged laterally in front of the south anchorage (7) according to the spacing of the second catwalk load-bearing cables (8). S3. Place several third catwalk load-bearing cable reels (10) on the pier top platform near the mid-span direction at the bottom of the north tower, pull out the third catwalk load-bearing cables (11) on the third catwalk load-bearing cable reels (10), and anchor them sequentially on the third anchor beam (403). Place the third anchor beam (403) on the tugboat (12), and the tugboat (12) tows the third anchor beam (403) to the bottom of the south tower. The number of third catwalk load-bearing cables (11) shall not be less than four. The third catwalk load-bearing cable reels (10) are arranged laterally on the pier top platform near the mid-span direction at the bottom of the north tower according to the spacing of the third catwalk load-bearing cables (11). In steps S1, S2, and S3, the overall erection of the catenary support cables is carried out simultaneously on their respective work faces. S4. Release the third catwalk load-bearing cable (11) at the third catwalk load-bearing cable disc (10), anchor it to the fourth anchor beam (404), and temporarily connect the first anchor beam (401) and the fourth anchor beam (404) to the top of the north tower's pier on both sides, and temporarily connect the second anchor beam (402) and the third anchor beam (403) to the top of the south tower's pier on both sides. S5. Release the temporary connection between the north tower foundation and the first anchor beam (401) and the fourth anchor beam (404), and the temporary connection between the south tower foundation and the second anchor beam (402) and the third anchor beam (403). Use the gantry cranes (13) arranged on the top of the north tower and the top of the south tower to lift the first anchor beam (401), the fourth anchor beam (404), the second anchor beam (402), and the third anchor beam (403) respectively, and then lift them to the corresponding tower top positions. S6. Temporarily fix the first anchor beam (401), the second anchor beam (402), the third anchor beam (403), and the fourth anchor beam (404). On the north and south sides of the top of the north and south towers, anchor the first catwalk load-bearing cable (3), the second catwalk load-bearing cable (8), and the third catwalk load-bearing cable (11) one by one. After the first catwalk load-bearing cable (3), the second catwalk load-bearing cable (8), and the third catwalk load-bearing cable (11) are anchored, remove the first anchor beam (401), the second anchor beam (402), the third anchor beam (403), and the fourth anchor beam (404). S7. Release the first catwalk load-bearing cable (3) at the first catwalk load-bearing cable reel (1) and anchor it to the first load-bearing cable anchor bracket (14) arranged on the top of the north anchor (2). Release the second catwalk load-bearing cable (8) at the second catwalk load-bearing cable reel (6) and anchor it to the second load-bearing cable anchor bracket (15) arranged on the top of the south anchor (7). Adjust the alignment of the first catwalk load-bearing cable (3), the second catwalk load-bearing cable (8), and the third catwalk load-bearing cable (11) to complete the overall erection of the catwalk load-bearing cable.

2. The construction method for integrally erecting the load-bearing cables of a suspension bridge catwalk according to claim 1, characterized in that, The first anchor beam (401), the second anchor beam (402), the third anchor beam (403), and the fourth anchor beam (404) are stiffened box beams or I-beam structures, and each of the first anchor beam (401), the second anchor beam (402), the third anchor beam (403), and the fourth anchor beam (404) is provided with lifting points (16) for traction and hoisting.

3. The construction method for integrally erecting the load-bearing cables of a suspension bridge catwalk according to claim 2, characterized in that, There are two gantry cranes (13) on the top of the north tower and two on the top of the south tower.

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