A sway construction pulling system for a side span main beam of a suspension bridge

Abstract

The application relates to the technical field of bridge construction, and particularly provides a sway construction traction system for a side span main beam of a suspension bridge, which comprises a clamp for hoisting a beam section, a cable crane comprising a lifting rope connected to a lifting point of the clamp and used for providing a lifting component force, a first traction assembly comprising a sway rope connected to a first side of the lifting point of the clamp and used for providing a component force towards the side span, and a second traction assembly comprising a counter-pulling rope connected to a second side of the lifting point of the clamp and used for providing a component force away from the side span; and the first traction assembly and the second traction assembly are arranged on both sides of a cable tower. Through the synergetic effect of the cable crane, the first traction assembly and the second traction assembly, the angle of one-time sway can be increased through the superposition of the first traction assembly and the second traction assembly, the safety of the sway construction is ensured, and the construction cost can be reduced and the construction efficiency can be improved through large-angle sway.

Description

Technical Field

[0001] This application relates to the field of bridge construction technology, and more specifically to a traction system for swinging construction of the main girder of a suspension bridge side span. Background Technology

[0002] A bridge is a structure erected to cross mountain streams, challenging geological conditions, or meet other transportation needs, thereby facilitating passage. According to the construction sequence, after the towers and main cables are constructed, the main girder of a suspension bridge is constructed, relying on the towers and main cables. Main girder construction includes: floating crane hoisting, support sliding method, cable-mounted crane vertical lifting method, cable-mounted crane swinging installation method, hydraulic lifting station vertical lifting method, hydraulic lifting station swinging method, and jacking method, among others.

[0003] The existing main beam swing-shifting construction method refers to the method of swinging the main beam from the transport ship onto the shore using pylons, main cables, and a lifting system. Swing-shifting construction has advantages such as low infrastructure investment, strong environmental adaptability, and high construction efficiency. However, it cannot be used in shallow coastal waters or areas with shallow water cover. When the transport ship is too far from the shore or when it is difficult to erect receiving supports on the shore, the main beam requires a large swing angle to be moved ashore. The safe swing angle for the swing rope is 10°-15°. Swinging too far in a single operation poses a construction risk. While switching to relay swinging can reduce the swing angle, it also has disadvantages such as high investment and long swinging time. Summary of the Invention

[0004] This application addresses the shortcomings of existing methods by proposing a traction system for swinging construction of the main girder of a suspension bridge side span, in order to solve the technical problem that related technologies cannot simultaneously achieve large-angle swinging in one operation and ensure swinging safety.

[0005] One embodiment of this application provides a traction system for swinging construction of the main girder of a suspension bridge side span, comprising: Clamps are used for lifting beam segments; A cable-mounted crane, including a lifting rope connected to the lifting point of the clamp for providing a lifting force; The first traction assembly includes a swing rope connected to a first side of the suspension point of the clamp for providing a component force toward the side span; The second traction assembly includes a counter-pull rope connected to the second side of the lifting point of the clamp for providing a component force against the side span; The first traction assembly and the second traction assembly are respectively located on both sides of the cable tower.

[0006] Specifically, the main technical concept of this application is to achieve swinging on the side of the span by using a first traction component in conjunction with a cable-mounted crane and to achieve swinging on the opposite side of the span by using a second traction component in conjunction with a cable-mounted crane. That is, this application achieves the superposition of swinging angles by using the synergistic action of the cable-mounted crane, the first traction component, and the second traction component, while ensuring safety. This increases the angle and distance of a single swing by the swinging rope. Thus, the angle of a single swing can be increased by using the superposition of the first traction component and the second traction component, ensuring the safety of the swinging construction. At the same time, the construction cost can be reduced and the construction efficiency can be improved by swinging at a large angle.

[0007] Furthermore, the swaying construction traction system for the main girder of a side span of a suspension bridge provided in this application also includes: The receiving platform is located on the side span and at the bottom of the tower; A transport platform, located away from the side span, is used for temporary storage of the beam segments; The cable-mounted crane is positioned between the receiving platform and the transport platform; The angle between the line connecting the cable-mounted crane and the receiving platform and the vertical projection line of the cable-mounted crane is in the range of 10°-15°. The angle between the line connecting the cable-mounted crane and the transport platform and the vertical projection line of the cable-mounted crane ranges from 10° to 15°. Further, the first traction component includes: The first winch is located at the top of the tower; The swaying rope is connected at one end to the first winch and at the other end to the beam segment; The first reversing element, a load-bearing cable installed between the tower and the side span anchor, is used to adjust the direction of the force of the swaying rope.

[0008] Specifically, another technical concept of this application is to provide an installation foundation for the first traction component through the top of the tower and the load-bearing cable between the tower and the side span anchorage, so that the first traction component can reuse existing infrastructure and reduce the investment cost of foundation construction.

[0009] Furthermore, the receiving platform includes: A support frame is installed at the base of the tower. A placement seat, disposed on the bracket, is used to receive the beam segment.

[0010] Furthermore, the placement seat is slidably connected to the bracket, and at least two sets of placement seats are configured.

[0011] Specifically, another technical concept of this application is that by using a sliding connection between the placement seat and the support, the beam segment can be swung in sections and then assembled on the receiving platform, thereby making it suitable for the swaying construction of large beam segments and expanding the applicable scenarios of this application.

[0012] Furthermore, the first traction assembly also includes: The support column is located on the side of the bracket facing away from the transport platform; A tensioning rope is installed on the column and connected to the swing rope, used to tension the swing rope in the direction of the side span.

[0013] Specifically, another technical concept of this application is to adjust the direction of the swinging rope by using a column and a tensioning rope to adjust the position of the beam segment as it swings to the receiving platform, making it easier for the receiving platform to receive the beam segment and improving the reliability of this application.

[0014] Further, the second traction component includes: The second winch is located at the top of the tower. The anti-pull rope is connected at one end to the second winch and at the other end to the beam segment; The second reversing element is installed on the load-bearing cable of the cable-mounted crane and is used to adjust the direction of the force of the reversing rope.

[0015] Optionally, the cable-mounted crane, the first traction assembly, and the second traction assembly are all equipped with tension sensors.

[0016] Optionally, the clamp includes: Clamping plates are used to connect the beam segments; A clamp, disposed on the clamp plate and facing away from the beam segment, is used to provide installation support for the lifting rope, swaying rope and counter-tension rope; A hydraulic assembly, disposed on the clamping plate and connected to the chuck, is used to adjust the chuck along the longitudinal direction of the clamping plate.

[0017] The beneficial technical effects of the technical solutions provided in this application include: During the main girder swinging construction, after the transport ship approaches the shore, a cable-mounted crane is set up between the shore and the transport ship. Simultaneously, a first traction assembly is set up on the shore, and a second traction assembly is set up on the side of the transport ship. The second traction assembly works with the cable-mounted crane to swing the girder segment from the transport ship to the vertical projection line of the cable-mounted crane. Then, at the vertical projection line of the cable-mounted crane, the first traction assembly, in conjunction with the cable-mounted crane, swings the girder segment from the vertical projection line of the cable-mounted crane to the shore. Since the first traction assembly controls the swinging process when the girder segment swings from the transport ship to directly under the cable-mounted crane, ensuring the safety of this swinging segment, and the second traction assembly controls the swinging process when the girder segment swings from directly under the cable-mounted crane to the shore, ensuring the safety of this swinging segment, this application allows for the simultaneous swinging of girder segments with large swing angles. This approach balances swinging safety with increased construction efficiency and reduced costs associated with large-angle swinging construction. Therefore, this application has the advantage of balancing large-angle swaying with ensuring swaying safety.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 A front view of a traction system for swinging construction of the main girder of a suspension bridge side span, provided in an embodiment of this application; Figure 2 Provided for the embodiments of this application Figure 1 Enlarged view of point A in the middle; Figure 3 Provided for the embodiments of this application Figure 1 Enlarged view of point B in the middle; Figure 4 Provided for the embodiments of this application Figure 1 Enlarged view of point C in the middle; Figure 5 Provided for the embodiments of this application Figure 1 Enlarged view of point D in the middle; Figure 6 Provided for the embodiments of this application Figure 1 Enlarged view of point E in the middle; Figure 7 Provided for the embodiments of this application Figure 1 Enlarged view of point F in the middle; Figure 8 A flowchart illustrating the process of a swaying construction traction system for the main girder of a suspension bridge side span, provided in this application embodiment; Figure label: 1. Clamp; 2. Cable-mounted crane; 3. First traction assembly; 4. Second traction assembly; 5. Receiving platform; 6. Transport platform; 7. Tower; 8. Anchorage; 9. Load-bearing cable; 10. Beam segment; 11. Clamping plate; 12. Clamp; 13. Hydraulic assembly; 21. Lifting rope; 31. Swinging rope; 32. First winch; 33. Third reversing component; 34. Column; 35. Tensioning rope; 36. Lifting rope; 41. 42. Reverse rope; 51. Second winch; 52. Support; 71. Tower; 371. First buckle; 372. First base; 373. First pulley; 374. First wheel assembly; 375. First hook; 431. Reversing pulley assembly; 432. Positioning component; 433. Second wheel assembly; 434. Second hook; 431a. Second buckle; 431b. Second base; 431c. Second pulley. Detailed Implementation

[0020] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions of the embodiments of this application.

[0021] Those skilled in the art will understand that, unless specifically stated otherwise, the terms "described" and "the" as used herein may also include plural forms. It should be further understood that the term "comprising" as used in the specification of this application means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude other features, information, data, steps, operations, elements, components, and / or combinations thereof supported by this art. The term "and / or" as used herein refers to at least one of the items defined by the term; for example, "A and / or B" can be implemented as "A," or as "B," or as "A and B."

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0023] This application mainly relates to a swinging construction traction system for the main beam of the side span of a suspension bridge. Through the arrangement of the cable-mounted crane, the first traction component and the second traction component, this application can safely swing a large angle at one time, which not only takes into account construction safety, but also realizes large-angle swinging. This application can effectively improve construction efficiency and control construction costs in scenarios with large swinging distances.

[0024] The research and development concept of this application includes: constructing a traction system for beam segments using a cable-mounted crane, a first traction component, and a second traction component. Simultaneously, the cable-mounted crane is used to lift the beam segment, the first traction component is used to pull the beam segment towards the side span, and the second traction component is used to pull the beam segment away from the side span. Through the coordinated use of the force components in three directions, the cable-mounted crane, in conjunction with the first traction component, can complete a swing at one safe angle, and the cable-mounted crane, in conjunction with the second traction component, can complete a swing at another safe angle. Therefore, by using two safe swing angles, the angle and distance of the beam segment's first swing can be increased, making this application suitable for application scenarios with excessively large swing angles, balancing large-angle swings and swing safety.

[0025] The technical solution of this application and how it solves the above-mentioned technical problems are described in detail below with specific embodiments. It should be noted that the following embodiments can be referenced, borrowed, or combined with each other, and the same terms, similar features, and similar implementation steps in different embodiments will not be described again.

[0026] Alternatively, please refer to Figure 1 This is a front view of a traction system for swinging construction of the main girder of a suspension bridge side span, provided in one embodiment of this application. Figure 1 The direction of the central arrow is used to indicate the swing direction of beam segment 10. In some construction scenarios, the water near the shore is shallow, preventing transport vessels from getting too close, or the construction foundation on the shore is poor, making it impossible to erect supports 51 near the shore. This presents the following problems: if the traditional swing construction method is still used to swing beam segment 10, either the construction risks of large-angle swings are ignored, posing potential construction safety hazards; or the shore foundation needs to be reinforced, resulting in increased construction costs and extended construction periods. In other words, in the above application scenarios, the swing construction method faces the dilemma of not being able to simultaneously ensure construction safety and large-angle swings.

[0027] The swaying construction traction system provided in this application includes: a clamp 1, a cable-mounted crane 2, a first traction assembly 3, a second traction assembly 4, a receiving platform 5, and a transport platform 6. The clamp 1 is used for clamping the beam crane and for lifting by the hoisting equipment, which includes the cable-mounted crane 2, the first traction assembly 3, and the second traction assembly 4. The cable-mounted crane 2 provides the lifting force via the lifting rope 1 connected to the lifting point of the clamp 1; the first traction assembly 3 provides the force towards the side span via the swaying rope 31 connected to the first side of the lifting point of the clamp 1; and the second traction assembly 4 provides the force away from the side span via the counter-tension rope 41 connected to the second side of the lifting point of the clamp 1. It is understood that the clamp 1 can be considered a type of lifting device. Side span and middle span are common technical terms in bridge engineering. A side span refers to the end span of a multi-span bridge; a middle span refers to the span between the side spans of a multi-span bridge. In a suspension bridge, the side span refers to the span between anchorage 8 and tower 7, while the middle span refers to the span between two towers 7. The first side refers to the side of clamp 1 from the middle span towards the side span; the second side, relative to the first side, refers to the side of clamp 1 from the side span towards the middle span. Simultaneously, the towers 7, anchorage 8, the load-bearing ropes between towers 7 and anchorage 8, and the load-bearing ropes between towers 7 have already been completed during the construction of the suspension bridge itself. A suspension bridge is a bridge whose superstructure primarily consists of cables suspended and anchored to both banks via towers 7. Tower 7 refers to the tower-shaped structure that supports the main cables of the suspension bridge; anchorage 8 refers to the structure that fixes the main cables and transmits loads towards the foundation; and load-bearing rope 9 refers to the main cables of the suspension bridge or the traction cables used to support the main cables. Therefore, towers 7, anchorage 8, and load-bearing ropes are all essential basic structures for a suspension bridge and do not require additional construction. This application reduces infrastructure investment costs and enhances its applicability by reusing the existing foundation structure of suspension bridges. Furthermore, besides being used for large-angle swing construction of suspension bridge main girders, this application can also be applied to other road and bridge construction scenarios requiring large-angle swing of beam segments 10.

[0028] Clamp 1 includes: clamping plate 11, chuck 12, and hydraulic assembly 13. (See reference...) Figure 2 for Figure 1 An enlarged schematic diagram at point A. Clamping plates 11 are connected to both the hoisting equipment and beam segment 10, respectively, for load transfer between the two; chucks 12 are slidably connected to clamping plates 11 for connection to the hoisting equipment; a hydraulic assembly 13 is disposed on clamping plates 11, with its transmission end connected to chucks 12, for adjusting the installation position of chucks 12 relative to clamping plates 11. It can be understood that beam segment 10 refers to one or more assembly units of the main beam. That is, this application can either swing the main beam as a whole or swing a portion of the main beam before assembly, making this application applicable to the segmented swinging of large main beams.

[0029] The clamping plate 11 is welded from steel plates that conform to national or industry standards for lifting tools. The clamping plate 11 is equipped with clamping parts for securing the beam segment 10. Understandably, the style of the clamping plate 11 can be adjusted according to the beam segment 10.

[0030] The clamp 12 includes a lifting section and a sliding section. The sliding section is connected to the clamp plate 11 via a sliding connection, and the lifting section is connected to the middle of the sliding section via a rotating connection. This allows the lifting section to adaptively adjust its posture during lifting, avoiding rigid shearing caused by multiple forces. Simultaneously, a lifting point is provided in the middle of the lifting section, which is used to simultaneously connect the lifting rope 21 of the cable crane 2, the first traction assembly 3 and the swing rope 31, and the counter-pull rope 41 of the second traction assembly 4.

[0031] The hydraulic assembly 13 adjusts the position of the clamp 12 relative to the clamping plate 11, thereby balancing the center of gravity of the clamp 1 and the beam segment 10, and improving the stability of the clamp 12 under the traction forces from the cable-driven crane 2, the first traction assembly 3, and the second traction assembly 4. It is understood that the hydraulic assembly 13 includes pneumatic jacks, hydraulic jacks, etc.

[0032] The cable-mounted crane 2 includes a lifting rope 21. The cable-mounted crane 2 refers to a lifting device that can travel along the load-bearing cable 9, and can be understood by referring to existing cable-mounted cranes 2. The cable-mounted crane 2 is slidably connected to the load-bearing cable 9. One end of the lifting rope 21 of the cable-mounted crane 2 is connected to the cable-mounted crane 2, and the other end is used to connect to the clamp 12. The cable-mounted crane 2 lifts the clamp 12 by winding up the rope and slacks the clamp 12 by unwinding the rope. The cable-mounted crane 2 of this application is set between the receiving platform 5 and the transport platform 6 to provide the lifting midpoint of the beam segment 10, realizing the swinging of the beam segment 10 at two swing angles.

[0033] The first traction assembly 3 includes: a swing rope 31, a first winch 32, a third reversing component 33, a column 34, a tension rope 35, a lifting rope 36, and the first reversing component. (See reference...) Figure 2 , 4 5 and 6 Figure 4 for Figure 1 Enlarged diagram of point C in the middle. Figure 5 for Figure 1 Enlarged diagram at point D in the middle. Figure 6 for Figure 1Enlarged schematic diagram at point E. The first winch 32 is located at the top of the temporary anchor tower 71 erected on the pylon 7, providing traction output; the third reversing member 33 is located at the bottom of the anchor tower 71, used to change the direction of the swing rope 31 from the top to the bottom of the tower; the column 34 is located at the bottom of the pylon 7 to provide installation for the tension rope 35 and the lifting rope 36; the tension rope 35 is used to tension the swing rope 31 segment between the clamp 1 and the column 34; the lifting rope 36 is used to lift the swing rope 31 segment between the clamp 1 and the column 34, so that the height of this swing rope 31 segment meets the height required to place the beam segment 10 on the receiving platform 5; the first reversing member is located between the load-bearing cable 9 from the pylon 7 to the side span anchorage 8 and the clamp 1, used to change the direction of the swing rope 31 from the side span towards the transport platform 6. It can be understood that the anchor tower 71 refers to a temporary construction platform commonly found in suspension bridge construction, formed by connecting steel components.

[0034] The swaying rope 31, tensioning rope 35, and lifting rope 36 are all ropes used for traction, such as common single-strand steel wire ropes and multi-strand steel wire ropes.

[0035] The first winch 32 is a light and small lifting device that uses a drum to wind steel wire rope or chain to lift or pull heavy objects.

[0036] The third reversing member 33 includes a base and a pulley mounted on and rotatable along the base. The base is fixed to the tower 71 by welding or bolting and is positioned in the winch direction of the first winch 32, so that the swaying rope 31, one end of which is connected to the first winch 32, changes the direction of force transmission from the first winch 32 through the pulley. Specifically, the third reversing member 33 is used to reverse the direction of the swaying rope 31 from the top of the tower 7 towards the middle of the load-bearing cable 9 between the tower 7 and the anchor 8, so that the swaying rope 31 passes through the third reversing member 33 and then through the first reversing member located in the middle of the load-bearing cable 9. It is understood that the base is a metal load-bearing structure with an installation interface for fixing to the attachment. The pulley is rotatably connected to a rotating cavity defined by the base via a central shaft, allowing the pulley to rotate within the rotating cavity. The outer circumference of the pulley has a cable groove for accommodating the rope, allowing the rope to change direction after passing through the cable groove.

[0037] The first reversing component includes: a first buckle 371, a first base 372, a first pulley 373, a first wheel assembly 374, and a first hook 375. The first buckle 371 is used to fasten to the outer periphery of the load-bearing cable 9 via a buckle structure; the first base 372 is connected to the first buckle 371; the first pulley 373 is rotatably connected to the first base 372. The first buckle 371, the first base 372, and the first pulley 373 are used to guide the swaying rope 31, which passes through the first pulley 373, toward the column 34. The first wheel assembly 374 is used to form a double-strand traction structure for the swaying rope 31; the first hook 375 is connected to the first wheel assembly 374 and includes a hook for connecting the rope, the hook for connecting the clamp 12, so that the swaying rope 31 provides a component force toward the side span to the beam segment 10 through the first hook 375 and the clamp 12.

[0038] The first clip 371 can be configured as an anti-slip strip wrapped around the cable clamp and a steel wire rope wrapped around the anti-slip strip, thereby fixing the first base 372 with the steel wire rope. It is understood that the cable clamp is a key load-bearing component of the superstructure of a suspension bridge, mainly used to clamp the main cable and connect the main cable to the suspenders. That is, the first clip 371 can be based on the cable clamp to improve the convenience of installing the first reverse component. Of course, the first clip 371 can also be configured as a cable clamp structure or other structures that can be used to fix it to the load-bearing cable 9. Specifically, the first clip 371 is located in the middle of the side span section of the load-bearing cable 9 between the tower 7 and the anchorage 8.

[0039] The first pulley group 374 includes pulley components respectively positioned near the column 34 and near the clamp 1, so that the swaying rope 31 forms a double-strand rope from the column 34 to the clamp 1, thereby improving the pulling efficiency and reliability through multi-line pulling. It is understood that the first pulley group 374 may also have multiple pulley components positioned between the column 34 and the clamp 1, so that the swaying rope 31 forms multiple strands; no further restrictions are imposed here.

[0040] A support column 34 is positioned at the end of the receiving platform 5 away from the transport platform 6, and is used to bear loads via the foundation or the receiving platform 5. It is understood that one end of a tension rope 35 is connected to the middle of the support column 34, and the other end of the tension rope 35 is connected to a pulley component of the first wheel assembly 374 near the support column 34. This allows the first wheel assembly 374 to be tensioned by the tension rope 35, ensuring that the height of the swaying rope 31 between the first wheel assemblies 374 is consistent with the height of the tension rope 35. In other words, the height of the tension rope 35 is used to confirm the receiving height of the beam segment 10. One end of a lifting rope 36 is also connected to the top of the support column 34, and the other end of the lifting rope 36 is connected to the middle of the tension rope 35. This allows for fine-tuning of the height of the tension rope 35, thereby enabling fine-tuning of the receiving height of the beam segment 10, facilitating the receiving platform 5's reception of the beam segment 10.

[0041] Therefore, the working principle of the first traction component 3 is as follows: the first winch 32 located at the top of the tower 7 provides the traction force for the swing rope 31. After the swing rope 31 passes through the third reversing member 33 and the first reversing member in sequence, it can generate a horizontal component force from the transport platform 6 toward the receiving platform 5, thereby realizing the receiving platform 5 receiving the beam segment 10. At the same time, the tension rope 35 on the column 34 is used to determine the receiving height of the beam segment 10, and the lifting rope 36 is used to fine-tune the receiving height of the beam segment 10, thereby reducing the difficulty of receiving the beam segment 10.

[0042] The second traction assembly 4 includes: a reverse rope 41, a second winch 42, and a second reversing component. (See reference...) Figure 2 , 3 and 6, Figure 3 for Figure 1 Enlarged schematic diagram at point B. The reverse pull rope 41 is configured as a traction rope; the second winch 42 is located at the top of the tower 71 to provide traction output; the second reversing member is located between the load-bearing cable 9 and the transport platform 6 between the towers 7 to change the direction of the reverse pull rope 41 from the tower 7 towards the transport platform 6.

[0043] The second reversing component includes: a reversing pulley component 431, a positioning component 432, a second wheel assembly 433, and a second hook 434. The reversing pulley component is used to change the direction of the pullback rope 41; the positioning component 432 and the second wheel assembly 433 are used to form a double-strand structure for the pullback rope 41 between the load-bearing cable 9 and the clamp 1. The second hook 434 is connected to the second wheel assembly 433 and includes a hook for connecting the rope. The hook is used to connect the clamp 12, so that the pullback rope 41 provides a component force against the side span to the beam segment 10 through the first hook 375 and the clamp 12.

[0044] The reversing pulley component 431 includes: a second buckle 431a, a second base 431b, and a second pulley 431c. The second buckle 431a is used to fasten to the outer periphery of the load-bearing cable 9 via a buckle structure. The second base 431b is connected to the second buckle 431a, and the second pulley 431c is rotatably connected to the second base 431b. The second buckle 431a, the second base 431b, and the second pulley 431c are used to direct the reverse pull rope 41 passing through the second pulley 431c toward the conveying platform 6.

[0045] The positioning component 432 is connected to the load-bearing cable 9 by a snap fastener and is used to provide the installation positioning of the reverse tension rope 41, thereby cooperating with the second wheel group 433 to form a double-strand reverse tension structure.

[0046] It is understood that both the second buckle 431a and the positioning element 432 are located in the middle of the mid-span of the load-bearing cable 9 between the two towers (another tower is not shown). The second buckle 431a is located near the side span.

[0047] Therefore, the working principle of the second traction assembly 4 is as follows: the second winch 42 located at the top of the tower 7 provides the traction force for the reverse rope 41. After being reversed by the second reversing member, the reverse rope 41 can generate a component force from the transport platform 6 toward the reverse rope 41. At the same time, the second wheel assembly 433, together with the positioning member 432, forms a double-strand reverse traction structure to improve the reliability and efficiency of the reverse traction.

[0048] The receiving platform 5 includes a base 52, a bracket 51, and a placement seat (not shown in the figure). Please refer to... Figure 7 for Figure 1 Enlarged schematic diagram at point F. The base 52 is configured as a support structure erected at the bottom of the cable tower 7; the bracket 51 is set on the base 52 to provide a working platform; the placement seat is slidably connected to the bracket 51 for receiving the beam segment 10 and for transferring the received beam segment 10, thereby realizing the splicing of the beam segment 10 on the receiving platform 5 and improving the applicability of this application to large modular beam segments 10.

[0049] The transport platform 6 is configured as a transport ship, a shuttle ship, or other platform that can provide beam segments 10 on water.

[0050] In some embodiments, combined with Figure 1-7 And refer to Figure 8 The working principle of this application will be explained. Figure 8 This application provides a flowchart of a traction system for swinging construction of a main girder in a side span of a suspension bridge, according to one embodiment. The working principle of this application is as follows: Before the swinging begins, the girder segment 10 is placed on the transport platform 6, for example, transported to a preset swinging starting point by a transport ship. Then, the cable-mounted crane 2 is moved to the middle between the transport platform 6 and the receiving platform 5, and the swinging angles of the cable-mounted crane 2 relative to the transport platform 6 and the receiving platform 5 are adjusted. The lifting rope 21, the swinging rope 31, and the counter-tension rope 41 are then connected to the clamp 1, and the center of gravity between the clamp 1 and the girder segment 10 is adjusted. After all preparations are complete, the counter-tension rope 41 is tensioned by the second traction component 4, and the swinging rope 31 of the first traction component 3 is loosened. Then, the girder segment 10 is lifted from the transport platform 6 to a feasible height by the starting rope of the cable-mounted crane 2. After the lifting state of beam segment 10 stabilizes, maintain the lifting state of the cable crane 2, and gradually reduce the traction force of the second traction component 4, causing the anti-pull rope 41 to slowly slacken, thus allowing beam segment 10 to swing from the transport platform 6 to directly below the cable crane 2 under the influence of gravity. That is, beam segment 10... Figure 8 (a) Swing towards the side span direction / swing direction at the first included angle α, reaching Figure 8 The position of (b). Figure 8 The dashed line in (a) refers to the vertical projection line of the cable-mounted crane 2. After beam segment 10 coincides with the vertical projection line of the cable-mounted crane 2 and stabilizes, Figure 8(b) In this state, the traction force of the lifting rope 21 of the cable crane 2 is maintained, the counter-pull rope 41 of the second traction component 4 is relaxed, and the traction force output of the first traction component 3 is gradually increased to tighten the swing rope 31, so that the beam segment 10 swings again towards the side span direction at a second included angle β under the traction of the swing rope 31, that is, the beam segment 10 moves from... Figure 8 (b) location reached Figure 8 (c) Position. After beam segment 10 swings at the second included angle β, it reaches the receiving platform 5, where it is placed and received. Since beam segment 10 actually swings by an angle α+β from the transport platform 6 to the receiving platform 5, and each swing angle is within a safe range, this application achieves large-angle swinging of beam segment 10 while ensuring safety. The values ​​of α and β are both within the range of 10°-15°, meaning the total swing angle of this application is 20°-30°, which is twice the safe angle of 10°-15° of the prior art's swinging rope 31.

[0051] In summary, this application provides a traction system for swinging construction of the main girder of a suspension bridge side span. After the transport vessel approaches the shore, a cable-mounted crane 2 is installed between the shore and the transport vessel. Simultaneously, a first traction component 3 is installed on the shore, and a second traction component 4 is installed on the side of the transport vessel. The second traction component 4 works in conjunction with the cable-mounted crane 2 to swing the girder segment 10 from the transport vessel to the vertical projection line of the cable-mounted crane 2. Then, at the vertical projection line of the cable-mounted crane 2, the first traction component 3, in conjunction with the cable-mounted crane 2, swings the girder segment 10 from the vertical projection line of the cable-mounted crane 2 to the shore. Because the first traction component 3 controls the swinging process when the girder segment 10 swings from the transport vessel to directly below the cable-mounted crane 2, the safety of this swinging segment is ensured; and because the second traction component 4 controls the swinging process when the girder segment 10 swings from directly below the cable-mounted crane 2 to the shore, the safety of this swinging segment is ensured. Meanwhile, the two swinging processes can be superimposed, allowing this application to perform large-angle swinging of beam segment 10 in one go. This ensures swinging safety while improving construction efficiency and reducing costs associated with large-angle swinging. Therefore, this application has the advantage of balancing large-angle swinging in one operation with guaranteed swinging safety.

[0052] Those skilled in the art will understand that the steps, measures, and solutions in the various operations, methods, and processes discussed in this application can be alternated, modified, combined, or deleted. Furthermore, other steps, measures, and solutions in the various operations, methods, and processes discussed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and solutions in related technologies that are similar to those disclosed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted.

[0053] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate directions or positional relationships based on the exemplary directions or positional relationships shown in the accompanying drawings. They are used to facilitate the description or simplification of the embodiments of this application and are not intended to indicate or imply that the device or component 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 application.

[0054] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0055] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0056] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0057] The above description is only a partial implementation of this application. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this application, without departing from the technical concept of this application, also fall within the protection scope of the embodiments of this application.

Claims

1. A traction system for swinging construction of the main girder of a suspension bridge side span, characterized in that, include: Clamps are used for lifting beam segments; A cable-mounted crane, including a lifting rope connected to the lifting point of the clamp for providing a lifting force; The first traction assembly includes a swing rope connected to a first side of the suspension point of the clamp for providing a component force toward the side span; The second traction assembly includes a counter-pull rope connected to the second side of the lifting point of the clamp for providing a component force against the side span; The first traction assembly and the second traction assembly are respectively located on both sides of the cable tower.

2. The swaying construction traction system for the main girder of a suspension bridge side span according to claim 1, characterized in that, Also includes: The receiving platform is located on the side span and at the bottom of the tower; A transport platform, located away from the side span, is used for temporary storage of the beam segments; The cable-mounted crane is positioned between the receiving platform and the transport platform; The angle between the line connecting the cable-mounted crane and the receiving platform and the vertical projection line of the cable-mounted crane is in the range of 10°-15°. The angle between the line connecting the cable-mounted crane and the transport platform and the vertical projection line of the cable-mounted crane is in the range of 10°-15°.

3. The swaying construction traction system for the main girder of a suspension bridge side span according to claim 2, characterized in that, The first traction assembly further includes: The first winch is located at the top of the tower; The first reversing element, a load-bearing cable disposed between the tower and the side span anchor, is used to adjust the direction of the force of the swaying rope; One end of the swaying rope is connected to the first winch, and the other end is used to connect to the beam segment.

4. The swaying construction traction system for the main girder of a suspension bridge side span according to claim 3, characterized in that, The receiving platform includes: A support frame is installed at the base of the tower. A placement seat, disposed on the bracket, is used to receive the beam segment.

5. The swaying construction traction system for the main girder of a suspension bridge side span according to claim 4, characterized in that, The placement seat is slidably connected to the bracket, and at least two sets of the placement seat are configured.

6. The swaying construction traction system for the main girder of a suspension bridge side span according to claim 4, characterized in that, The first traction assembly further includes: The support column is located on the side of the bracket facing away from the transport platform; A tensioning rope is installed on the column and connected to the swing rope, used to tension the swing rope in the direction of the side span.

7. The swaying construction traction system for the main girder of a suspension bridge side span according to claim 2, characterized in that, The second traction assembly further includes: The second winch is located at the top of the tower. The second reverse component is installed on the load-bearing cable of the cable-mounted crane and is used to adjust the direction of the force of the reverse tension rope. The anti-pull rope is connected at one end to the second winch and at the other end to the beam segment.

8. The swaying construction traction system for the main girder of a suspension bridge side span according to claim 7, characterized in that, The second reverse component includes: A reversing pulley assembly, used for reversing the direction of the reverse tension rope; A positioning element is used to position the other end of the reverse pull rope.

9. The swaying construction traction system for the main girder of a suspension bridge side span according to claim 1, characterized in that, The cable-mounted crane, the first traction assembly, and the second traction assembly are all equipped with tension sensors.

10. The swaying construction traction system for the main girder of a suspension bridge side span according to claim 1, characterized in that, The clamp includes: Clamping plates are used to connect the beam segments; A clamp, disposed on the clamp plate and facing away from the beam segment, is used to provide installation support for the lifting rope, swaying rope and counter-tension rope; A hydraulic assembly, disposed on the clamping plate and connected to the chuck, is used to adjust the chuck along the longitudinal direction of the clamping plate.

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