A bridge cable-stayed installation structure and construction method

Abstract

The present invention relates to the technical field of bridge construction, and specifically discloses a bridge cable-stayed cable installation structure and a construction method, comprising: a limit assembly, a plurality of guide blocks and a plurality of adjustment assemblies, the limit assembly being coaxially sleeved on the upper end of the cable-through hole, the plurality of guide blocks being hingedly arranged at the front end of the limit assembly around the axis of the cable-through hole, the plurality of guide blocks being all inclined, and the plurality of guide blocks gradually moving away from the axis of the cable-through hole from bottom to top, and the adjustment assembly comprising an eccentric wheel and a sliding block; a bridge cable-stayed cable installation structure and a construction method of the present invention solve the problem that the cable-stayed cable is difficult to align when moving in the cable-through hole, is prone to collision, and causes thread damage and jamming.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to a bridge stay cable installation structure and a construction method. Background Art

[0002] As a long-span bridge structure, cable-stayed bridges have been widely used in modern transportation engineering due to their beautiful shape, excellent mechanical properties, and economic advantages. Its core load-bearing system consists of main beams, bridge towers, and cable stays. The cable stays, as key components for transferring loads, transmit the dead and live loads of the main beams to the bridge towers through high-strength cables, directly affecting the overall stiffness, stability, and durability of the bridge. With the continuous increase in bridge spans and the increasing complexity of structural forms, the installation structure design and construction methods of cable stays have gradually become engineering technical difficulties and research hotspots. Cable-stayed cable threading, as a core process in cable-stayed bridge construction, is directly related to the installation efficiency of the cable system, the accuracy of cable force distribution, and the overall structural performance of the bridge. Cable-stayed bridges transfer the main beam load to the bridge towers through high-strength cables. The cable-threading process must ensure the precise positioning, smooth traction, and reliable anchoring of the cables in complex spatial configurations. As bridge spans increase and cable layouts become more complex (such as spatial double cable planes and dense cable systems), cable-threading technology faces higher technical challenges, and its construction quality directly affects the safety, durability, and maintenance costs of bridges throughout their life cycle.

[0003] A Chinese patent document with authorization announcement number CN102373669B discloses an automatic balancing cable feeding device, including a lifting load that can be installed on a lifting device, with a fixed length rod and a variable length rod with adjustable length hinged at the bottom of the lifting load, and the bottom ends of the fixed length rod and the variable length rod are respectively hinged with Haver clamps, which can improve the efficiency of cable threading, avoid damage to the cable, extend the service life of the cable, and ensure safety during the use period. It is suitable for lifting and feeding cables of different diameters, lengths, and angles, can be coordinated with different lifting devices, and can be used on different cable-stayed bridges. It is easy to assemble and disassemble, and convenient to transport to the construction site.

[0004] In the related art, the installation of the stay cable is divided into the cable threading at the bridge tower end and the cable threading on the bridge deck. When threading the stay cable on the bridge deck, the stay cable needs to be passed through the cable threading hole set on the bridge deck and fixed. When threading the stay cable, the end diameter of the stay cable is similar to the diameter of the cable threading hole, and the end of the stay cable is provided with a thread for fixing. In addition, the stay cable itself is flexible and will have a certain curvature during the lifting process. It is difficult to align the stay cable when passing through the cable threading hole. The stay cable is easy to collide with the cable threading hole, which will cause damage to the thread on the stay cable. The stay cable is easy to get stuck when moving in the cable threading hole. Summary of the Invention

[0005] The present invention provides a bridge cable-stayed installation structure and construction method, aiming to solve the problems in related technologies that, when threading the cable, the end diameter of the cable is close to the diameter of the cable-through hole, the end of the cable is provided with a thread for fixation, and the cable itself is flexible and will have a certain curvature during the lifting process. The cable is difficult to align when passing through the cable hole, the cable is prone to collide with the cable hole, which may cause damage to the thread on the cable, and the cable is prone to get stuck when moving through the cable hole.

[0006] A bridge cable installation structure includes a plurality of cable holes provided on the cable and the bridge, a limit assembly, the limit assembly being coaxially sleeved on the upper end of the cable hole, a plurality of guide blocks, the plurality of guide blocks being hingedly provided on the upper end of the limit assembly around the axis of the cable hole, the plurality of guide blocks rotating around the hinge axis, the guide blocks approaching or moving away from the axis of the cable hole toward the surface of the cable hole, a plurality of adjustment assemblies, the plurality of adjustment assemblies being respectively provided on the upper end of the guide blocks, the adjustment assemblies including an eccentric wheel and a sliding block, the sliding block It is arranged in the guide block, and the eccentric wheel is hinged at one end of the sliding block close to the inclined cable. Multiple eccentric wheels rotate synchronously. Before the cable is passed through, the projection of the guide block on the lower side of the hinge axis is located in the cable passing hole on the projection surface of the end face of the cable passing hole in a top view. When the cable is passed through, the inclined cable presses against the guide block on the lower side of the hinge axis, and the inclined cable continues to move. Multiple guide blocks rotate to press against the inclined cable, and the sliding block moves to make the eccentric wheel press against the flexible section of the inclined cable. When the inclined cable moves, it drives the eccentric wheel to rotate, and the two opposite eccentric wheels make the inclined cable shake.

[0007] The effect is that through the coordinated use of the limit assembly, the guide block and the adjustment assembly, the stability and accuracy of the inclined cable during the threading process are improved, and the situation that the inclined cable is stuck and damaged when moving in the threading hole is avoided. The limit assembly is coaxially sleeved on the front end of the threading hole, and the device is fixed at the front end of the threading hole to facilitate threading. Multiple guide blocks are hingedly arranged at the front end of the limit assembly, tilted and gradually away from the axis of the threading hole from bottom to top, ensuring that the inclined cable can smoothly enter the threading hole. The adjustment assembly includes an eccentric wheel and a sliding block, which is arranged on the guide block. The eccentric wheel presses against the flexible section of the inclined cable through the movement of the sliding block, ensuring that the inclined cable will continue to shake during the movement, preventing the inclined cable from getting stuck between the inclined cable and the threading hole, resulting in the inclined cable being unable to be threaded normally, and the threaded section of the inclined cable being damaged and unable to be fixed normally, thereby ensuring that the inclined cable can smoothly enter the threading hole.

[0008] Preferably, a plurality of rollers are provided on the end face of the guide block close to the cable passing hole, and the plurality of rollers are arranged at equal intervals along the length direction of the guide block. When the cable is passed through, the guide block is parallel to the cable passing hole, and the projections of the plurality of rollers close to the cable passing hole are located inside the cable passing hole in a top view. The effect is that by providing a plurality of rollers, the problem that the inclined cable is prone to collision and wear with the cable passing hole during the cable passing process is solved, thereby ensuring smooth movement of the inclined cable and reducing wear, and significantly improving the installation efficiency and service life of the inclined cable.

[0009] Preferably, a plurality of hinged rods are provided at the upper end of the limit assembly, a positioning block is provided on the hinged rod, the guide block is hinged on the hinged rod, and a torsion spring is provided between the hinged rod and the guide block, one end of the torsion spring is connected to the hinged rod, and the other end is connected to the guide block. Before threading the cable, the torsion spring drives the guide block to press against the positioning block, limiting the guide block from rotating outward. The effect is that by setting a combined structure of the limit assembly, the hinged rod, the positioning block and the torsion spring, the problem that the guide block may rotate outward during the cable threading process is solved, the positioning accuracy and smoothness of the inclined cable during the cable threading process are improved, the risk of collision between the inclined cable and the cable threading hole is reduced, and the possibility of damage to the inclined cable is reduced, thereby improving the installation efficiency and service life of the inclined cable.

[0010] Preferably, a sliding groove is provided on the side of the upper end of the guide block facing the rope hole, the sliding block is arranged in the sliding groove, a telescopic rod is arranged in the sliding groove, one end of the telescopic rod is connected to the sliding block, and the other end is connected to the bottom of the sliding groove, and a connecting port is provided on the guide block, the connecting port is communicated with the telescopic rod, and a hydraulic pump is connected to the outside of the connecting port to control the extension and retraction of the telescopic rod.

[0011] Preferably, the middle diameter of the eccentric is smaller than that of the two ends, and a flexible pad is provided on the circumferential surface of the eccentric. The effect is that by setting the eccentric with a smaller middle diameter than that of the two ends and setting a flexible pad on the surface of the eccentric, the problem of the eccentric adapting to the shape of the inclined cable and stably driving the inclined cable to shake during the installation of the bridge inclined cable is solved, making the inclined cable more stable during the cable threading process.

[0012] Preferably, a lubrication assembly is provided on the side of the lower end of the guide block facing the cable passage hole, and the lubrication assembly is used to apply a lubricating medium on the inclined cable passing through. The effect is that by arranging the lubrication assembly at the lower end of the guide block, the inclined cable can pass through the cable passage hole smoothly during the cable passage process, which can effectively reduce the friction between the inclined cable and the cable passage hole, thereby avoiding wear and damage of the inclined cable.

[0013] Preferably, the lubrication assembly includes lubricating cotton and an oil collecting trough. The oil collecting trough is arranged on the guide block, the opening of the oil collecting trough faces the cable hole, and the front end of the oil collecting trough is provided with lubricating cotton.

[0014] Preferably, the side of the guide block facing the cable hole is V-shaped, both V-shaped surfaces of the guide block abut against the inclined cable, and both V-shaped surfaces are provided with rollers.

[0015] Preferably, the limiting assembly includes at least two arc-shaped limiting blocks arranged around the axis of the cable hole, and a telescopic driving source is provided between adjacent limiting blocks.

[0016] A method for constructing a bridge stay cable, using the aforementioned bridge stay cable installation structure, comprises the following steps:

[0017] S1. Sleeve the limit assembly on the front end of the cable hole, fix the limit assembly on the cable hole, and set the multiple guide blocks at an angle;

[0018] S2. The crane moves the stay cable to the front end of the cable hole. The stay cable moves toward the cable hole along multiple guide blocks. When the threaded section of the stay cable abuts the guide block on the lower side of the hinge axis, the multiple guide blocks rotate simultaneously, and the multiple guide blocks simultaneously abut the threaded section of the stay cable.

[0019] S3: The cable continues to move, and the threaded section enters the cable hole. The eccentric wheel abuts against the flexible section of the cable. When the cable moves, the relative eccentric wheel rotates, causing the cable to shake, and the cable continues to move.

[0020] S4. Fix the inclined cable in the cable hole, unlock the limit assembly, and remove the limit assembly from the cable hole to complete the installation.

[0021] The effect is that through the above construction method, the alignment and movement of the inclined cable during cable insertion can be completed quickly, the collision damage between the inclined cable and the cable insertion hole is reduced, the problem of difficult alignment during the installation of the inclined cable is solved, and the problem of damage to the inclined cable thread during cable insertion is avoided.

[0022] By adopting the above technical solution, the beneficial effects of the present invention are:

[0023] 1. The present invention solves the problem of difficult alignment and easy collision of the stay cable in the cable threading hole, which leads to thread damage and jamming, through the coordinated action of the limit assembly, guide block and eccentric wheel. It significantly improves the installation efficiency and reliability of the stay cable and can effectively avoid damage and jamming of the stay cable during the cable threading process.

[0024] 2. The present invention solves the problem of lubrication of the inclined cable during the cable threading process by providing a lubrication component, reduces the friction between the inclined cable and the cable threading hole, avoids damage to the inclined cable thread, and improves the smoothness of the cable threading.

[0025] 3. The present invention improves the alignment and movement efficiency of the inclined cable in the cable hole through the V-shaped design of the guide block and the setting of the roller, reduces the collision damage between the inclined cable and the cable hole, and solves the problem of difficult alignment during the installation of the inclined cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 Schematic diagram of the cable-threading structure of the present invention.

[0028] Figure 3 For the present invention Figure 2 Enlarged view of part A.

[0029] Figure 4 It is a schematic structural diagram of the guide assembly of the present invention.

[0030] Figure 5 It is a schematic diagram of the structure of the regulating component of the present invention.

[0031] Figure 6 It is a schematic structural diagram of the lubrication component of the present invention.

[0032] Figure 7 It is a schematic diagram of the structure of the limiting component of the present invention.

[0033] Reference numerals:

[0034] 1. Stay cable; 2. Cable hole; 3. Limiting assembly; 31. Articulated rod; 32. Positioning block; 33. Torsion spring; 34. Limiting block; 35. Telescopic drive source; 4. Guide block; 41. Roller; 42. Slide; 43. Telescopic rod; 5. Adjusting assembly; 51. Eccentric wheel; 52. Sliding block; 53. Flexible pad; 6. Lubricating assembly; 61. Lubricating cotton; 62. Oil collecting tank. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0036] like Figures 1 to 7As shown, a bridge cable-stayed installation structure includes a limit assembly 3, a plurality of guide blocks 4 and a plurality of adjustment assemblies 5. The limit assembly 3 is coaxially sleeved on the upper end of the cable hole 2. The limit assembly 3 and the upper end surface of the cable hole 2 are located in the same plane. The plurality of guide blocks 4 are hinged around the axis of the cable hole 2 and are arranged at the front end of the limit assembly 3. The plurality of guide blocks 4 rotate around the hinge axis. The surface of the guide block 4 facing the cable hole 2 approaches or moves away from the axis of the cable hole 2. The guide block 4 on the lower side of the hinge axis is projected into the cable hole 2 to ensure that the inclined cable 1 can smoothly enter the cable hole 2. The adjustment assembly 5 is arranged on the guide block 4. The plurality of guide blocks 4 rotate when the inclined cable 1 is against the lower side of the hinge axis. The invention relates to a method for controlling the movement of the inclined cable 1, and at the same time ensuring that the threaded section of the inclined cable 1 is coaxial with the cable hole 2, further guiding the inclined cable 1 into the cable hole 2, and the adjusting component 5 resists the flexible section of the inclined cable 1, ensuring that the inclined cable 1 will continuously shake during the movement without getting stuck or damaged, and can smoothly enter the cable hole 2. The installation structure improves the stability and accuracy of the inclined cable 1 during the cable threading process through the coordinated use of the limiting component 3, the guide block 4 and the adjusting component 5, and avoids the situation where the inclined cable 1 gets stuck and damaged when moving in the cable hole 2. The limiting component 3 is coaxially sleeved on the front end of the cable hole 2, and the device is fixed at the front end of the cable hole 2 to facilitate cable threading.

[0037] like Figure 3 、 Figure 4 and Figure 7 As shown, the limit assembly 3 includes a limit block 34 and a telescopic drive source 35. At least two arc-shaped limit blocks 34 are arranged around the axis of the cable hole 2, which can provide a limiting effect during the cable threading process of the inclined cable 1 to ensure that the end of the inclined cable 1 is aligned with the cable hole 2. The telescopic drive source 35 is arranged between adjacent limit blocks 34 and can provide power to adjust the position of the limit block 34, so that the arc-shaped limit block 34 can adapt to cable holes 2 of different diameters, thereby improving the cable threading efficiency of the inclined cable 1.

[0038] The limit block 34 is made of high-strength material, preferably aluminum alloy or galvanized steel, to ensure its durability and reliability during use. A flexible pad is provided on the inner side of the arc-shaped limit block 34 to increase the friction between the limit block 34 and the outer wall of the cable hole 2. The flexible pad is preferably made of rubber. The telescopic drive source 35 is preferably a hydraulic cylinder and an electric telescopic rod 43, etc., which can be selected and configured according to actual needs. The number and shape of the arc-shaped limit blocks 34 can be adjusted according to the size and shape of the cable hole 2 to ensure the best limiting effect. A buckle is provided at the position where the telescopic end of the telescopic drive source 35 is connected to the limit block 34 to facilitate installation and disassembly.

[0039] like Figures 4 to 7As shown, the limiting assembly 3 also includes a hinged rod 31, a positioning block 32 and a torsion spring 33. A plurality of hinged rods 31 are arranged at the upper end of the limiting block 34 around the axis of the cable hole 2. A plurality of hinged rods 31 are provided with positioning blocks 32. A plurality of positioning blocks 32 are arranged on the hinged rod 31 along the direction of the hinge axis. A plurality of guide blocks 4 are respectively hinged on the hinged rod 31. A torsion spring 33 is provided between the hinged rod 31 and the guide block 4. One end of the torsion spring 33 is connected to the hinged rod 31, and the other end is connected to the guide block 4. Before threading the cable, the torsion spring 33 drives the guide block 4 to press against the positioning block 32, limiting the guide block 4 from rotating outward, ensuring that the guide block 4 is in a stable position when threading the cable. It will not rotate outward and has a guiding effect on the inclined cable 1, limiting the inclined cable 1 in the area surrounded by multiple guide blocks 4, thereby ensuring the accurate positioning and smooth passage of the inclined cable 1 during the cable insertion process, avoiding the collision between the inclined cable 1 and the cable insertion hole 2. The torsion spring 33 can be made of different materials and specifications to adapt to different usage environments and needs. For example, the torsion spring 33 can be made of high-strength steel to improve its durability and fatigue resistance and increase its service life. The position of the positioning block 32 on the hinged rod 31 can be adjusted to adjust the initial position and angle of the guide block 4, so as to have a wider range of guiding effect on the inclined cable 1.

[0040] like Figures 1 to 4 As shown, multiple guide blocks 4 rotate around the hinge axis, and the surface of the guide block 4 facing the cable hole 2 approaches or moves away from the axis of the cable hole 2. In the projection surface of the end face of the cable hole 2 in a top view, the guide block 4 on the lower side of the hinge axis is projected inside the cable hole 2. Before cable passage, multiple guide blocks 4 are tilted. After the inclined cable 1 moves to the area enclosed by multiple guide blocks 4, the guide blocks 4 guide the inclined cable 1. When the inclined cable 1 simultaneously presses against the lower side of the hinge axis of all guide blocks 4, the guide blocks 4 overcome the rotation of the torsion spring 33, and multiple guide blocks 4 press against the threaded section of the inclined cable 1, limiting the inclined cable 1 and the cable hole 2 to remain coaxial.

[0041] like Figures 3 to 5 As shown, a plurality of rollers 41 are provided on the end face of the guide block 4 close to the cable hole 2, and the plurality of rollers 41 are arranged at equal intervals along the length direction of the guide block 4. When threading the cable, the guide block 4 is parallel to the cable hole 2, and the plurality of guide blocks 4 are against the threaded section of the inclined cable 1. When viewed from top to bottom, the projections of the plurality of rollers 41 close to the cable hole 2 are located inside the cable hole 2, so that the inclined cable 1 can be limited to be located between the rollers 41 on the plurality of guide blocks 4, ensuring that the inclined cable 1 and the cable hole 2 remain coaxial, thereby avoiding collision between the inclined cable 1 and the cable hole 2, and effectively guiding the inclined cable 1 to pass through the cable hole 2. Through the action of the rollers 41, the inclined cable 1 will not directly contact the inner wall of the cable hole 2 during the threading process, reducing the wear and the possibility of the inclined cable 1 getting stuck.

[0042] like Figures 4 to 6As shown, a slide groove 42 is provided on the side of the upper end of the guide block 4 facing the cable hole 2, and an adjustment component 5 is provided in the slide groove 42. The adjustment component 5 includes: an eccentric wheel 51, a sliding block 52 and a flexible pad 53. The sliding block 52 is arranged in the slide groove 42, and the sliding block 52 is extended and retracted along the sliding groove to approach or move away from the inclined cable 1. A telescopic rod 43 is provided in the sliding groove, and one end of the telescopic rod 43 is connected to the sliding block 52, and the other end is connected to the bottom of the slide groove 42. A connecting port is provided on the guide block 4, and the connecting port is communicated with the telescopic rod 43. A hydraulic pump is connected to the outside of the connecting port to control the extension and retraction of the telescopic rod 43. The telescopic rod 43 is preferably operated by a hydraulic control system, and the length of the telescopic rod 43 is adjusted by the hydraulic pump, thereby adjusting the position of the sliding block 52. The hydraulic pump controls the extension and retraction of the telescopic rod 43 through the connecting port, thereby realizing the adjustment of the position of the sliding block 52.

[0043] The eccentric wheel 51 is hinged on the sliding block 52 at one end near the inclined cable 1, and multiple eccentric wheels 51 rotate synchronously. The relative eccentric wheels 51 are initially parallel, and the two relative eccentric wheels 51 are initially 180 degrees apart. When the eccentric wheels 51 rotate synchronously, the inclined cable 1 shakes. When the cable is threaded, the inclined cable 1 presses against the guide block 4 on the lower side of the hinge axis. Multiple guide blocks 4 rotate to press against the inclined cable 1. The inclined cable 1 continues to move. The sliding block 52 moves to make the eccentric wheel 51 press against the flexible section of the inclined cable 1. When the inclined cable 1 moves, it drives the eccentric wheel 51 to rotate synchronously. When the eccentric wheel 51 rotates, it drives the inclined cable 1 to shake with the eccentric wheel 51, thereby reducing the situation where the threaded section of the inclined cable 1 presses against the side wall of the cable threading hole 2 and cannot continue to be threaded.

[0044] like Figure 4 and Figure 5 As shown, the eccentric wheel 51 is set to have a smaller diameter in the middle than at both ends, and a flexible pad 53 is provided on the surface of the eccentric wheel 51. The smaller diameter in the middle than at both ends enables the eccentric wheel 51 to better fit the inclined cable 1, providing stable support and guidance. The setting of the flexible pad 53 can effectively reduce the wear and damage of the inclined cable 1 when it contacts the eccentric wheel 51 during movement, while increasing the friction between the two to prevent the two from sliding during movement.

[0045] The design of the eccentric wheel 51 having a smaller diameter in the middle than at both ends can be achieved in a variety of ways. For example, the eccentric wheel 51 can be machined into a shape in which the diameter in the middle is smaller than at both ends, or the eccentric wheel 51 that meets the requirements can be directly manufactured by mold forming. In addition, the flexible pad 53 on the surface of the eccentric wheel 51 can be made of a variety of materials, preferably rubber, polyurethane, etc. The flexible pad 53 can be fixed to the surface of the eccentric wheel 51 by bonding, hot pressing, etc. to ensure that it will not fall off during use.

[0046] The eccentric wheel 51 can better fit the stay cable 1, provide stable support and guidance, and effectively reduce the wear and damage of the stay cable 1 during movement, thereby improving the service life and installation quality of the stay cable 1.

[0047] As a preferred embodiment, the guide block 4 can be provided with a plurality of slide grooves 42, each of which is provided with a sliding block 52, a telescopic rod 43 and an eccentric wheel 51, so as to further improve the stability and smoothness of the inclined cable 1 when moving in the cable hole 2. The hydraulic pump can adopt a multi-channel control system to control the extension and retraction of the telescopic rod 43 in each slide groove 42 respectively, so that the adjustment process is more flexible.

[0048] like Figures 4 to 6 As shown, the guide block 4 is arranged in a V-shape on the side facing the cable hole 2, and rollers 41 are provided on both side surfaces of the V-shaped surface. The rollers 41 on both sides of the V-shaped surface are in contact with the inclined cable 1, and the adjustment component 5 is only arranged on one of the two side surfaces of the V-shaped surface. The V-shaped design of the guide block 4 can make the inclined cable 1 easier to align in the cable hole 2. The arrangement of multiple groups of rollers 41 on the two surfaces of the V-shaped surface further reduces the friction of the inclined cable 1 during movement, allowing it to smoothly enter the cable hole 2.

[0049] The roller 41 can be mounted on the V-shaped surface via a bearing to ensure that it can rotate freely when the cable 1 moves to reduce friction. The roller 41 is made of a wear-resistant material, preferably nylon or polyurethane, to increase its service life.

[0050] like Figures 3 to 6 As shown, the lubrication component 6 includes lubricating cotton 61 and an oil collecting tank 62. The lubrication component 6 is arranged on the side of the lower end of the guide block 4 facing the cable hole 2. The oil collecting tank 62 is arranged at the bottom of the guide block 4. The opening of the oil collecting tank 62 faces the cable hole 2. The front end of the oil collecting tank 62 is provided with lubricating cotton 61. The lubrication component 6 lubricates the inclined cable 1 during the cable threading process through the cooperation of the lubricating cotton 61 and the oil collecting tank 62. The lubricating cotton 61 can store the lubricating medium and evenly apply it on the surface of the inclined cable 1 when the inclined cable 1 passes through. The oil collecting tank 62 ensures the supply of the lubricating medium. The lubrication component 6 effectively reduces the friction between the inclined cable 1 and the cable hole 2, and avoids damage to the surface of the inclined cable 1 and its thread.

[0051] The lubricating cotton 61 can be made of a highly absorbent material, such as polyester fiber or cotton fiber, to ensure the storage and release of the lubricating medium. The oil collecting tank 62 can be designed to be detachable to facilitate the addition and maintenance of the lubricating medium. The shape and size of the oil collecting tank 62 should match the guide block 4 to ensure that the lubricating medium can be fully supplied to the lubricating cotton 61, and the lubricating medium is applied to the threaded section of the inclined cable 1, thereby reducing the difficulty of tightening the thread when the inclined cable 1 is fixed, and significantly reducing the workload of workers.

[0052] Working principle: Before threading the cable, the limit assembly 3 is sleeved on the front end of the cable hole 2, and the telescopic driving source 35 is started to make the adjacent arc-shaped limit blocks 34 close to each other, so that the limit assembly 3 is fixed on the cable hole 2, so that the upper end surface of the limit block 34 and the upper end surface of the cable hole 2 are in the same plane, and the torsion spring 33 makes the multiple guide blocks 4 rotate around the hinge rod 31, so that the multiple guide blocks 4 are tilted, and the crane moves the inclined cable 1 to the front end of the cable hole 2, and the inclined cable 1 moves toward the cable hole 2 along the multiple guide blocks 4. When the threaded section of the inclined cable 1 is against the guide block 4 on the lower side of the hinge axis, the multiple guide blocks 4 overcome the torsion spring 33 and rotate at the same time, and the rollers 41 provided on the multiple guide blocks 4 are against the threaded section of the inclined cable 1 at the same time, and the inclined cable 1 continues to move along the guide block 4. 1, the threaded portion 61 of the side of the cable is squeezed to squeeze the lubricating cotton 61, and the lubricating cotton 61 is applied to the threaded section of the cable 1. The cable 1 continues to move, and the threaded section enters the cable hole 2. The hydraulic pump controls the telescopic rod 43 to extend so that the eccentric wheel 51 abuts against the flexible section of the cable 1. When the cable 1 moves, the relative eccentric wheel 51 rotates, causing the cable 1 between the eccentric wheels 51 to shake, and the flexible section of the cable 1 to shake, causing the threaded section of the cable 1 to shake in the cable hole 2. The cable 1 completely enters the cable hole 2, and the nut is used to fix the cable 1 in the cable hole 2. The telescopic drive source 35 is started to adjust the distance between adjacent limit blocks 34, and the telescopic drive source 35 is disconnected from the limit block 34, so that the limit assembly 3 is removed from the cable hole 2 to complete the installation.

[0053] A bridge stay cable installation construction method comprises the following steps:

[0054] S1. Sleeve the limit assembly 3 on the front end of the cable hole 2 to fix the limit assembly 3 on the cable hole 2. The torsion spring 33 makes the multiple guide blocks 4 lean against the positioning block 32 and be tilted.

[0055] S2. The crane moves the stay cable 1 to the front end of the cable hole 2. The stay cable 1 moves toward the cable hole 2 along the multiple guide blocks 4. When the threaded section of the stay cable 1 simultaneously abuts against the guide blocks 4 on the lower sides of the multiple hinged rods 31, the multiple guide blocks 4 rotate simultaneously. The rollers 41 on the guide blocks 4 simultaneously abut against the threaded section of the stay cable 1. The distances between the thread of the stay cable 1 and the rollers 41 are different.

[0056] S3, the cable 1 continues to move along the guide block 4, and the threads on the side of the cable 1 squeeze the lubricating cotton 61, and the lubricating cotton 61 applies lubricating medium to the threaded section of the cable 1;

[0057] S4: The threaded section of the cable 1 continues to move until it enters the cable hole 2. The hydraulic pump controls the telescopic rod 43 to extend so that the eccentric wheel 51 abuts against the flexible section of the cable 1. As the cable 1 continues to move, the eccentric wheel 51 rotates with the movement of the cable 1. Driven by the eccentric wheel 51, the cable 1 shakes.

[0058] S5. After the inclined cable 1 is completely inserted into the cable hole 2, the inclined cable 1 is fixed with a nut;

[0059] S6. After the fixation is completed, the telescopic driving source 35 is started to adjust the distance between the adjacent limit blocks 34, and the telescopic driving source 35 is disconnected from the limit blocks 34, so that the limit assembly 3 is removed from the cable hole 2 to complete the installation of the inclined cable 1.

[0060] The key to this construction method lies in the design and operation of the limit assembly 3 and the multiple guide blocks 4. The limit assembly 3 is fixed to the front end of the cable insertion hole 2, and the multiple guide blocks 4 are arranged at an angle to ensure that the inclined cable 1 can smoothly enter the cable insertion hole 2 during the cable insertion process. The configuration of the eccentric wheel 51 allows the inclined cable 1 to shake during movement, further ensuring the smooth entry of the inclined cable 1. The unlocking and removal steps of the limit assembly 3 ensure the final fixation and installation of the inclined cable 1.

[0061] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A bridge cable installation structure, comprising a cable and a plurality of cable holes provided on the bridge, characterized in that: include: A limiting component is coaxially sleeved on the upper end of the cable hole; A plurality of guide blocks are hingedly arranged on the upper end of the limit assembly around the axis of the cable hole, and the plurality of guide blocks rotate around the hinge axis, and the surface of the guide blocks facing the cable hole approaches or moves away from the axis of the cable hole; Multiple groups of adjustment components are respectively arranged on the upper end of the guide block, and the adjustment components include an eccentric wheel and a sliding block. The sliding block is arranged in the guide block, and the eccentric wheel is hinged at one end of the sliding block close to the inclined cable. The multiple eccentric wheels rotate synchronously; Before threading the cable, on the projection surface of the end face of the cable hole in a top view, the projection of the guide block on the lower side of the hinge axis is located in the cable hole. When threading the cable, the inclined cable presses against the guide block on the lower side of the hinge axis, and the inclined cable continues to move. The multiple guide blocks rotate to press against the inclined cable, and the sliding block moves to make the eccentric wheel press against the flexible section of the inclined cable. When the inclined cable moves, the eccentric wheel is driven to rotate, and the two opposite eccentric wheels make the inclined cable shake. A plurality of rollers are provided on the end face of the guide block on the side close to the cable hole, and the multiple rollers are arranged at equal intervals along the length direction of the guide block. When threading the cable, the guide block is parallel to the cable hole, and the projections of the multiple rollers on the side close to the cable hole in a top view are located in the cable hole. A plurality of hinged rods are provided at the upper end of the limit assembly, a positioning block is provided on the hinged rod, the guide block is hinged on the hinged rod, and a torsion spring is provided between the hinged rod and the guide block. One end of the torsion spring is connected to the hinged rod, and the other end is connected to the guide block. Before threading the rope, the torsion spring drives the guide block to press against the positioning block to limit the guide block from rotating outward.

2. A bridge cable-stayed installation structure according to claim 1, characterized in that: A slide groove is provided on the side of the upper end of the guide block facing the rope hole, the sliding block is arranged in the slide groove, a telescopic rod is arranged in the sliding groove, one end of the telescopic rod is connected to the sliding block, and the other end is connected to the bottom of the slide groove, a connecting port is provided on the guide block, the connecting port is communicated with the telescopic rod, and a hydraulic pump is connected to the outside of the connecting port to control the extension and retraction of the telescopic rod.

3. The bridge cable-stayed installation structure according to claim 2, characterized in that: The diameter of the middle part of the eccentric wheel is smaller than that of the two ends, and a flexible pad is provided on the circumferential surface of the eccentric wheel.

4. The bridge cable-stayed installation structure according to claim 1, characterized in that: A lubricating assembly is provided on one side of the lower end of the guide block facing the cable passing hole, and the lubricating assembly is used to apply a lubricating medium on the oblique cable passing through.

5. The bridge cable-stayed installation structure according to claim 4, characterized in that: The lubrication assembly includes lubricating cotton and an oil collecting tank. The oil collecting tank is arranged on the guide block, the opening of the oil collecting tank faces the cable hole, and the front end of the oil collecting tank is provided with lubricating cotton.

6. The bridge cable-stayed installation structure according to claim 1, characterized in that: The side of the guide block facing the cable hole is V-shaped, and both V-shaped surfaces of the guide block are in contact with the inclined cable, and both V-shaped surfaces are provided with rollers.

7. The bridge cable-stayed installation structure according to claim 1, characterized in that: The limiting assembly comprises at least two arc-shaped limiting blocks arranged around the axis of the cable hole, and a telescopic driving source is arranged between adjacent limiting blocks.

8. A method for constructing a bridge stay cable, characterized in that: A bridge cable-stayed installation structure according to any one of claims 1 to 7 is used, comprising the following steps: S1. Sleeve the limit assembly on the front end of the cable hole, fix the limit assembly on the cable hole, and set the multiple guide blocks at an angle; S2. The crane moves the stay cable to the front end of the cable hole. The stay cable moves toward the cable hole along multiple guide blocks. When the threaded section of the stay cable abuts the guide block on the lower side of the hinge axis, the multiple guide blocks rotate simultaneously, and the multiple guide blocks simultaneously abut the threaded section of the stay cable. S3: The cable continues to move, and the threaded section enters the cable hole. The eccentric wheel abuts against the flexible section of the cable. When the cable moves, the relative eccentric wheel rotates, causing the cable to shake, and the cable continues to move. S4. Fix the inclined cable in the cable hole, unlock the limit assembly, and remove the limit assembly from the cable hole to complete the installation.

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