Bridge stay cable mounting structure and construction method

Abstract

The invention relates to the technical field of bridge construction, and particularly discloses a bridge stay cable mounting structure and a construction method.The bridge stay cable mounting structure comprises a limiting assembly, a plurality of guide blocks and a plurality of adjusting assemblies, the limiting assembly coaxially sleeves the upper end of a cable penetrating hole, the guide blocks are hinged to the front end of the limiting assembly around the axis of the cable penetrating hole, and the guide blocks are obliquely arranged; the multiple guide blocks are gradually away from the axis of the cable penetrating hole from bottom to top. The adjusting assembly comprises an eccentric wheel and a sliding block. According to the bridge stay cable mounting structure and the construction method, the problems that a stay cable is difficult to align when moving in a cable penetrating hole, and threads are damaged and clamped due to the fact that the stay cable is prone to collision are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and particularly relates to a cable-stayed cable installation structure and construction method for a bridge. Background Art

[0002] As a long-span bridge structure, the cable-stayed bridge has been applied in modern traffic engineering with its beautiful shape, excellent mechanical properties and economic advantages. Its core load-bearing system consists of a main girder, a bridge tower and cable-stayed cables. Among them, the cable-stayed cables, as key components for transferring loads, transfer the dead load and live load of the main girder to the bridge tower through high-strength cables, directly affecting the overall stiffness, stability and durability of the bridge. With the continuous increase of the bridge span and the complexity of the structural form, the design of the cable-stayed cable installation structure and the construction method have gradually become the difficulties and research hotspots in engineering technology. The cable threading of the cable-stayed cable, as the core process in the construction of the cable-stayed bridge, is directly related to the installation efficiency of the cable system, the accuracy of the cable force distribution and the overall structural performance of the bridge. The cable-stayed bridge transfers the main girder load to the bridge tower through high-strength cables, and its cable threading process needs to ensure the accurate positioning, smooth traction and reliable anchoring of the cables under complex spatial configurations. With the increase of the bridge span and the complexity of the cable plane layout (such as spatial double cable planes, dense cable systems), the cable threading technology faces higher technical challenges, and its construction quality directly affects the safety, durability and the whole life cycle maintenance cost of the bridge.

[0003] The Chinese patent document with the authorization announcement number of CN102373669B discloses an automatic balance hoisting cable feeding device, including a hanging bracket that can be installed on a hoisting device. A fixed long rod and a variable-length rod with adjustable length are hinged at the bottom of the hanging bracket. Hafer clamps are respectively hinged at the bottom ends of the fixed long rod and the variable-length rod, which can improve the efficiency of cable threading, avoid damage to the cable, extend the service life of the cable, ensure safety during the service period, be applicable to the hoisting and feeding of cables with different diameters, different lengths and different angles, can cooperate with different hoisting devices, can be used on different cable-stayed bridges, and is convenient for assembly and disassembly and transportation to the construction site.

[0004] In the related technology, the installation of the cable-stayed cable is divided into the cable threading at the bridge tower end and the cable threading on the bridge deck. When threading the cable-stayed cable on the bridge deck, it is necessary to thread the cable-stayed cable into the cable threading hole provided on the bridge deck and fix the cable-stayed cable. When threading the cable, since the diameter of the end of the cable-stayed cable is similar to the diameter of the cable threading hole, there is a thread for fixing on the end of the cable-stayed cable, and the cable-stayed cable itself is flexible and will have a certain arc during hoisting. It is difficult to align the cable-stayed cable when it is inserted into the cable threading hole, and the cable-stayed cable is likely to collide with the cable threading hole, resulting in damage to the thread on the cable-stayed cable, and the cable-stayed cable is likely 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 a construction method, aiming to solve the problems in the related art that when the cable is passed through, the end diameter of the cable is similar to the diameter of the cable passing hole, a thread for fixing is arranged on the end of the cable, and the cable itself is flexible and has a certain curvature during the lifting process. It is difficult to align the cable when passing through the cable hole, the cable easily collides with the cable passing hole, which may cause damage to the thread on the cable, and the cable easily gets stuck when moving through the cable hole.

[0006] A bridge cable installation structure includes a plurality of cable holes arranged on the cable and the bridge, a limit assembly, the limit assembly is coaxially sleeved on the upper end of the cable hole, a plurality of guide blocks, the plurality of guide blocks are hingedly arranged around the axis of the cable hole at the upper end of the limit assembly, the plurality of guide blocks rotate around the hinge axis, the surface of the guide block facing the cable hole approaches or moves away from the axis of the cable hole, a plurality of adjustment assemblies, the plurality of adjustment assemblies are respectively arranged on the upper end of the guide block, the adjustment assembly includes 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 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. 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 at 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 being stuck between the inclined cable and the threading hole, resulting in the inability to thread the inclined cable normally, and the problem that the threaded section of the inclined cable is damaged and cannot 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 on the side close to the cable threading hole. The plurality of 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 threading hole. In the top view projection of the plurality of rollers, the projection of the side of the roller close to the cable threading hole is located within the cable threading hole. The effect is that by providing a plurality of rollers, the problem that the stay cable is prone to collision and wear with the cable threading hole during the cable threading process is solved, ensuring the smooth movement of the stay cable and reducing wear, and significantly improving the installation efficiency and service life of the stay cable.

[0009] Preferably, a plurality of hinge rods are provided at the upper end of the limit assembly. Positioning blocks are provided on the hinge rods. The guide block is hinged on the hinge rods. A torsion spring is provided between the hinge rods and the guide block. One end of the torsion spring is connected to the hinge rod, and the other end is connected to the guide block. Before threading the cable, the torsion spring drives the guide block to abut against the positioning block, restricting the outward rotation of the guide block. The effect is that by providing a combined structure of the limit assembly, hinge rods, positioning blocks and torsion springs, the problem that the guide block may rotate outward during the cable threading process is solved, improving the positioning accuracy and smoothness during the cable threading process of the stay cable, reducing the collision risk between the stay cable and the cable threading hole, and reducing the possibility of damage to the stay cable, thereby improving the installation efficiency and service life of the stay cable.

[0010] Preferably, a chute is provided on the side of the upper end of the guide block facing the cable threading hole. A sliding block is arranged in the chute. A telescopic rod is arranged in the sliding chute. One end of the telescopic rod is connected to the sliding block, and the other end is connected to the bottom of the chute. A connection port is provided on the guide block, and the connection port communicates with the telescopic rod. A hydraulic pump is externally connected to the connection port to control the telescopic movement of the telescopic rod.

[0011] Preferably, the diameter of the middle part of the eccentric wheel is smaller than that of both ends. A flexible pad is provided on the circumferential surface of the eccentric wheel. The effect is that by providing an eccentric wheel with a smaller middle diameter than both ends and a flexible pad on the surface of the eccentric wheel, the problem that the eccentric wheel adapts to the shape of the stay cable and stably drives the stay cable to shake during the installation of the stay cable of the bridge is solved, making the stay 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 threading hole. The lubrication assembly is used to apply a lubricating medium to the stay cable. The effect is that by providing a lubrication assembly at the lower end of the guide block, the stay cable can smoothly pass through the cable threading hole during the cable threading process, effectively reducing the friction between the stay cable and the cable threading hole, and avoiding wear and damage to the stay cable.

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

[0014] Preferably, the side of the guide block facing the cable passage 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.

[0015] Preferably, 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.

[0016] A construction method for a bridge cable-stayed cable, using the above-mentioned bridge cable-stayed cable installation structure, comprises 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 arrange the multiple guide blocks in an inclined manner; S2, the crane moves the inclined cable to the front end of the cable hole, and the inclined cable moves toward the cable hole along the multiple guide blocks. When the threaded section of the inclined cable abuts against the guide block on the lower side of the hinge axis, the multiple guide blocks rotate simultaneously, and the multiple guide blocks abut against the threaded section of the inclined cable at the same time; S3, the threaded section of the inclined cable continues to move into the cable hole, and the eccentric wheel abuts against the flexible section of the inclined cable. When the inclined cable moves, the relative eccentric wheel rotates to make the inclined cable shake, and the inclined 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.

[0017] The effect is that through the above construction method, the alignment and movement of the inclined cable during cable insertion can be quickly completed, 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.

[0018] By adopting the above technical solution, the beneficial effects of the present invention are as follows: 1. The present invention solves the problem that the inclined cable is difficult to align when moving in the cable hole, and is easy to collide and cause thread damage and jamming through the synergistic effect of the limit assembly, the guide block and the eccentric wheel, significantly improves the installation efficiency and reliability of the inclined cable, and can effectively avoid the damage and jamming of the inclined cable during the cable insertion process.

[0019] 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.

[0020] 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

[0021] Figure 1Schematic diagram of the overall structure of the present invention.

[0022] Figure 2 Schematic diagram of the cable threading structure of the present invention.

[0023] Figure 3 For the Figure 2 enlarged view of part A in the present invention.

[0024] Figure 4 Schematic diagram of the guiding component structure of the present invention.

[0025] Figure 5 Schematic diagram of the adjusting component structure of the present invention.

[0026] Figure 6 Schematic diagram of the lubricating component structure of the present invention.

[0027] Figure 7 Schematic diagram of the limiting component structure of the present invention.

[0028] Reference numerals: 1, stay cable; 2, cable threading hole; 3, limiting component; 31, hinged rod; 32, positioning block; 33, torsion spring; 34, limiting block; 35, telescopic driving source; 4, guiding block; 41, roller; 42, sliding groove; 43, telescopic rod; 5, adjusting component; 51, eccentric wheel; 52, sliding block; 53, flexible pad; 6, lubricating component; 61, lubricating cotton; 62, oil collecting groove. Detailed description of the specific implementation

[0029] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0030] As Figures 1 to 7As shown in the figure, a cable-stayed cable installation structure for a bridge includes a limiting component 3, a plurality of guiding blocks 4, and a plurality of adjusting components 5. The limiting component 3 is coaxially sleeved on the upper end of the cable-passing hole 2, and the upper end surface of the limiting component 3 and the cable-passing hole 2 are in the same plane. A plurality of guiding blocks 4 are hinged around the axis of the cable-passing hole 2 at the front end of the limiting component 3. The plurality of guiding blocks 4 rotate around the hinge axis, and the surface of the guiding block 4 facing the cable-passing hole 2 approaches or moves away from the axis of the cable-passing hole 2. The projection of the guiding block 4 below the hinge axis is located within the cable-passing hole 2 to ensure that the stay cable 1 can smoothly enter the cable-passing hole 2. The adjusting component 5 is arranged on the guiding block 4. When the stay cable 1 abuts against the lower side of the hinge axis, the plurality of guiding blocks 4 rotate to limit the movement of the stay cable 1, and at the same time ensure that the threaded section of the stay cable 1 is coaxial with the cable-passing hole 2, further guiding the stay cable 1 into the cable-passing hole 2. The adjusting component 5 abuts against the flexible section of the stay cable 1 to ensure that the stay cable 1 will shake continuously during the movement without getting stuck and damaged and can smoothly enter the cable-passing hole 2. Through the coordinated use of the limiting component 3, the guiding block 4, and the adjusting component 5, the stability and accuracy of the stay cable 1 during the cable-passing process are improved, and the situation of the stay cable 1 getting stuck and damaged when moving in the cable-passing hole 2 is avoided. The limiting component 3 is coaxially sleeved on the front end of the cable-passing hole 2 to fix the device at the front end of the cable-passing hole 2 for easy cable passing.

[0031] As Figure 3 , Figure 4 and Figure 7 shown, the limiting component 3 includes a limiting block 34 and a telescopic driving source 35. At least two arc-shaped limiting blocks 34 are arranged around the axis of the cable-passing hole 2, which can provide a limiting effect during the cable-passing process of the stay cable 1 to ensure that the end of the stay cable 1 is aligned with the cable-passing hole 2. The telescopic driving source 35 is arranged between adjacent limiting blocks 34 and can provide the power to adjust the position of the limiting block 34, so that the arc-shaped limiting block 34 can adapt to cable-passing holes 2 with different diameters and improve the cable-passing efficiency of the stay cable 1.

[0032] The limiting block 34 is made of high-strength material, preferably aluminum alloy or galvanized steel, to ensure its durability and reliability during use. A flexible gasket is arranged on the inner side of the arc-shaped limiting block 34 to increase the friction between the limiting block 34 and the outer wall of the cable-passing hole 2. The flexible gasket is preferably made of rubber material. The telescopic driving 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 limiting blocks 34 can be adjusted according to the size and shape of the cable-passing hole 2 to ensure the best limiting effect. A buckle is arranged at the position where the telescopic end of the telescopic driving source 35 is connected to the limiting block 34 for easy installation and disassembly.

[0033] As Figures 4 to 7As shown in the figure, the limit component 3 further includes articulated rods 31, positioning blocks 32 and torsion springs 33. A plurality of articulated rods 31 are arranged at the upper end of the limit block 34 around the axis of the cable passing hole 2. Positioning blocks 32 are arranged on each of the plurality of articulated rods 31. The plurality of positioning blocks 32 are arranged on the articulated rods 31 along the direction of the articulation axis. A plurality of guide blocks 4 are respectively articulated on the articulated rods 31. A torsion spring 33 is arranged between the articulated rod 31 and the guide block 4. One end of the torsion spring 33 is connected to the articulated rod 31, and the other end is connected to the guide block 4. Before the cable is passed through, the torsion spring 33 drives the guide block 4 to abut against the positioning block 32, restricting the outward rotation of the guide block 4, ensuring that the guide block 4 will not rotate outward during the cable passing process, and having a guiding effect on the stay cable 1, limiting the stay cable 1 within the area surrounded by the plurality of guide blocks 4, thereby ensuring the accurate positioning and smooth passing of the stay cable 1 during the cable passing process, avoiding the collision between the stay cable 1 and the cable passing hole 2. The torsion spring 33 can be made of different materials and specifications to adapt to different usage environments and requirements. 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 articulated rod 31 can be adjusted to adjust the initial position and angle of the guide block 4, achieving a greater range of guiding effect on the stay cable 1.

[0034] As Figures 1 to 4 shown, the plurality of guide blocks 4 rotate around the articulation axis, and the surface of the guide block 4 facing the cable passing hole 2 approaches or moves away from the axis of the cable passing hole 2. On the projection plane of the end face of the cable passing hole 2 in a top view, the projection of the guide block 4 below the articulation axis is located within the cable passing hole 2. Before the cable is passed through, the plurality of guide blocks 4 are inclined. After the stay cable 1 moves to the area surrounded by the plurality of guide blocks 4, the guide blocks 4 guide the stay cable 1. When the stay cable 1 abuts against the lower side of the articulation axis of all the guide blocks 4 at the same time, the guide blocks 4 rotate against the torsion spring 33, and the plurality of guide blocks 4 abut against the threaded section of the stay cable 1, restricting the stay cable 1 to be coaxial with the cable passing hole 2.

[0035] As Figures 3 to 5 shown, a plurality of rollers 41 are arranged on the end face of the side of the guide block 4 close to the cable passing hole 2. The plurality of rollers 41 are arranged at equal intervals along the length direction of the guide block 4. When the cable is passed through, the guide block 4 is parallel to the cable passing hole 2. The plurality of guide blocks 4 abut against the threaded section of the stay cable 1. From the top-down top view angle, the projection of the side of the roller 41 close to the cable passing hole 2 is located within the cable passing hole 2. This can limit the stay cable 1 between the rollers 41 on the plurality of guide blocks 4, ensuring that the stay cable 1 and the cable passing hole 2 are coaxial, thereby avoiding the collision between the stay cable 1 and the cable passing hole 2 and effectively guiding the stay cable 1 to pass through the cable passing hole 2. Through the action of the rollers 41, the stay cable 1 will not directly contact the inner wall of the cable passing hole 2 during the cable passing process, reducing the wear and jamming possibility of the stay cable 1.

[0036] As Figures 4 to 6As shown in the figure, a sliding groove 42 is formed on one side of the upper end of the guiding block 4 facing the cable threading hole 2. An adjusting assembly 5 is arranged in the sliding groove 42. The adjusting assembly 5 includes: an eccentric wheel 51, a sliding block 52 and a flexible pad 53. The sliding block 52 is arranged in the sliding groove 42. The sliding block 52 moves along the sliding groove to approach or move away from the stay cable 1. A telescopic rod 43 is arranged in the sliding groove. 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 sliding groove 42. A connection port is arranged on the guiding block 4. The connection port communicates with the telescopic rod 43. A hydraulic pump is externally connected to the connection port to control the telescopic movement of the telescopic rod 43. The telescopic rod 43 is preferably operated by a hydraulic control system. The length of the telescopic rod 43 is adjusted through the hydraulic pump, and then the position of the sliding block 52 is adjusted. The hydraulic pump controls the telescopic movement of the telescopic rod 43 through the connection port, thereby realizing the adjustment of the position of the sliding block 52.

[0037] The eccentric wheel 51 is hinged to one end of the sliding block 52 close to the stay cable 1. A plurality of eccentric wheels 51 rotate synchronously. The opposite eccentric wheels 51 are initially parallel, and the opposite two eccentric wheels 51 are initially 180 degrees apart. When the eccentric wheels 51 rotate synchronously, the stay cable 1 shakes. During cable threading, the stay cable 1 abuts against the guiding block 4 below the hinge axis. A plurality of guiding blocks 4 rotate to abut against the stay cable 1. As the stay cable 1 continues to move, the sliding block 52 moves so that the eccentric wheel 51 abuts against the flexible section of the stay cable 1. When the stay cable 1 moves, it drives the eccentric wheel 51 to rotate synchronously. When the eccentric wheel 51 rotates, it drives the stay cable 1 to shake along with the eccentric wheel 51, reducing the situation where the threaded section of the stay cable 1 abuts against the side wall of the cable threading hole 2 and gets stuck and cannot continue to thread the cable.

[0038] As Figure 4 and Figure 5 shown in the figure, the eccentric wheel 51 is set to have a smaller diameter in the middle than at both ends, and a flexible pad 53 is arranged on the surface of the eccentric wheel 51. The smaller diameter in the middle enables the eccentric wheel 51 to better fit the stay cable 1, providing stable support and guidance. The setting of the flexible pad 53 can effectively reduce the wear and damage of the stay cable 1 when it contacts the eccentric wheel 51 during movement, and at the same time increase the friction between the two, preventing them from sliding when moving.

[0039] The design of the eccentric wheel 51 having a smaller diameter in the middle than at both ends can be achieved in various ways. For example, the eccentric wheel 51 can be machined into a shape with a smaller diameter in the middle than at both ends through mechanical processing, or an eccentric wheel 51 meeting the requirements can be directly manufactured through die forming. In addition, the flexible pad 53 on the surface of the eccentric wheel 51 can be made of various materials, preferably rubber, polyurethane, etc. The flexible pad 53 can be fixed on the surface of the eccentric wheel 51 through bonding, hot pressing, etc., to ensure that it will not fall off during use.

[0040] By setting the eccentric wheel 51, it can better fit the stay cable 1, provide stable support and guidance, and at the same time effectively reduce the wear and damage of the stay cable 1 during movement, improving the service life and installation quality of the stay cable 1.

[0041] As a preferred embodiment, the guiding block 4 can be provided with a plurality of sliding grooves 42, and each sliding groove 42 is provided with a sliding block 52, a telescopic rod 43 and an eccentric wheel 51 to further improve the stability and smoothness of the stay cable 1 when moving in the cable passing hole 2. The hydraulic pump can adopt a multi-channel control system to respectively control the telescopic movement of the telescopic rods 43 in each sliding groove 42, making the adjustment process more flexible.

[0042] As Figures 4 to 6 shown, one side of the guiding block 4 facing the cable passing hole 2 is set in a V shape, and rollers 41 are arranged on both sides of the V-shaped surface. The rollers 41 on both sides of the V-shaped surface are in contact with the stay cable 1. The adjusting assembly 5 is only arranged on one of the two sides of the V-shaped surface. The V-shaped design of the guiding block 4 can make the stay cable 1 more easily aligned in the cable passing hole 2. The arrangement of multiple groups of rollers 41 on the two surfaces of the V-shaped surface further reduces the friction force of the stay cable 1 during movement, enabling it to smoothly enter the cable passing hole 2.

[0043] The rollers 41 can be installed on the V-shaped surface through bearings to ensure that they can rotate freely when the stay cable 1 moves, reducing the friction force. The material of the rollers 41 is selected as wear-resistant material, preferably nylon or polyurethane, to increase its service life.

[0044] As Figures 3 to 6 shown, the lubrication assembly 6 includes a lubricating cotton 61 and an oil collecting groove 62. The lubrication assembly 6 is arranged on one side of the lower end of the guiding block 4 facing the cable passing hole 2. The oil collecting groove 62 is arranged at the bottom of the guiding block 4, and the opening of the oil collecting groove 62 faces the cable passing hole 2. A lubricating cotton 61 is arranged at the front end of the oil collecting groove 62. The lubrication assembly 6 lubricates the stay cable 1 during the process of the stay cable 1 passing through the cable passing hole 2 through the cooperation of the lubricating cotton 61 and the oil collecting groove 62. The lubricating cotton 61 can store the lubricating medium and evenly apply it on the surface of the stay cable 1 when the stay cable 1 passes through. The oil collecting groove 62 ensures the supply of the lubricating medium. The lubrication assembly 6 effectively reduces the friction between the stay cable 1 and the cable passing hole 2, avoiding damage to the surface and threads of the stay cable 1.

[0045] The lubricating cotton 61 can be made of highly absorbent materials such as polyester fiber or cotton fiber to ensure the storage and release of the lubricating medium. The oil collecting groove 62 can be designed to be detachable for easy addition and maintenance of the lubricating medium. The shape and size of the oil collecting groove 62 should match the guiding block 4 to ensure that the lubricating medium can fully supply the lubricating cotton 61 to apply the lubricating medium to the threaded section of the stay cable 1, reducing the difficulty of tightening the threads when the stay cable 1 is fixed and significantly reducing the workload of workers.

[0046] Working principle: Before threading the cable, the limit component 3 is sleeved on the front end of the cable threading hole 2. The telescopic drive source 35 is started to make the adjacent arc-shaped limit blocks 34 approach each other, so that the limit component 3 is fixed on the cable threading hole 2, and the upper end surface of the limit block 34 is in the same plane as the upper end surface of the cable threading hole 2. The torsion spring 33 makes multiple guide blocks 4 rotate around the hinge rod 31, so that the multiple guide blocks 4 are arranged obliquely. The crane moves the stay cable 1 to the front end of the cable threading hole 2, and the stay cable 1 moves towards the cable threading hole 2 along the multiple guide blocks 4. When the threaded section of the stay cable 1 abuts against the guide block 4 below the hinge axis, the multiple guide blocks 4 rotate simultaneously against the torsion spring 33, and the rollers 41 arranged on the multiple guide blocks 4 simultaneously abut against the threaded section of the stay cable 1. The stay cable 1 continues to move along the guide block 4, and the thread on the side of the stay cable 1 squeezes the lubricating cotton 61, and the lubricating cotton 61 applies a lubricating medium to the threaded section of the stay cable 1. The stay cable 1 continues to move, and the threaded section enters the cable threading 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 stay cable 1. When the stay cable 1 moves, the relative eccentric wheel 51 rotates, causing the stay cable 1 between the eccentric wheels 51 to shake, and the flexible section of the stay cable 1 shakes, causing the threaded section of the stay cable 1 to shake in the cable threading hole 2. The stay cable 1 completely enters the cable threading hole 2, and the stay cable 1 in the cable threading hole 2 is fixed by using a nut. The telescopic drive source 35 is started to adjust the distance between the adjacent limit blocks 34, and the connection between the telescopic drive source 35 and the limit block 34 is disconnected, so that the limit component 3 is removed from the cable threading hole 2 to complete the installation.

[0047] A method for installing and constructing stay cables of a bridge, which comprises the following steps: S1. The limit component 3 is sleeved on the front end of the cable threading hole 2, so that the limit component 3 is fixed on the cable threading hole 2, and the torsion spring 33 makes multiple guide blocks 4 abut against the positioning block 32 and be arranged obliquely; S2. The crane moves the stay cable 1 to the front end of the cable threading hole 2, and the stay cable 1 moves towards the cable threading hole 2 along the multiple guide blocks 4. When the threaded section of the stay cable 1 abuts against the guide blocks 4 below the multiple hinge rods 31 at the same time, the multiple guide blocks 4 rotate simultaneously, and the rollers 41 on the guide blocks 4 simultaneously abut against the threaded section of the stay cable 1, and the distance between the thread of the stay cable 1 and the roller 41 is different; S3. The stay cable 1 continues to move along the guide block 4, and the thread on the side of the stay cable 1 squeezes the lubricating cotton 61, and the lubricating cotton 61 applies a lubricating medium to the threaded section of the stay cable 1; S4. The stay cable 1 continues to move and the threaded section enters the cable threading 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 stay cable 1. When the stay cable 1 continues to move, the relative eccentric wheel 51 rotates around its own axis as the stay cable 1 moves, and the stay cable 1 shakes under the drive of the eccentric wheel 51; S5. After the stay cable 1 completely penetrates into the cable threading hole 2, the stay cable 1 is fixed with a nut; After the fixation is completed, start the telescopic drive source 35 to adjust the distance between adjacent limit blocks 34, disconnect the telescopic drive source 35 from the limit blocks 34, and remove the limit component 3 from the cable passing hole 2 to complete the installation of the stay cable 1.

[0048] The key to the above construction method lies in the design and working mode of the limit component 3 and the multiple guide blocks 4. The limit component 3 is fixed at the front end of the cable passing hole 2, and the multiple guide blocks 4 are arranged obliquely to ensure that the stay cable 1 can smoothly enter the cable passing hole 2 during the cable passing process. The setting of the eccentric wheel 51 enables the stay cable 1 to shake during the movement, further ensuring the smooth entry of the stay cable 1. The unlocking and removal steps of the limit component 3 ensure the final fixation and installation completion of the stay cable 1.

[0049] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A cable-stayed cable installation structure for a bridge, comprising The stay cable (1) and multiple cable-passing holes (2) provided on the bridge, characterized in that it includes: A limit component (3), which is coaxially sleeved on the upper end of the cable-passing hole (2); Multiple guiding blocks (4), which are hingedly arranged around the axis of the cable-passing hole (2) at the upper end of the limit component (3). The multiple guiding blocks (4) rotate around the hinge axis, and the surface of the guiding block (4) facing the cable-passing hole (2) approaches or moves away from the axis of the cable-passing hole (2); Multiple groups of adjusting components (5), which are respectively arranged at the upper ends of the guiding blocks (4). The adjusting component (5) includes an eccentric wheel (51) and a sliding block (52). The sliding block (52) is arranged inside the guiding block (4). The eccentric wheel (51) is hinged at one end of the sliding block (52) close to the stay cable (1), and the multiple eccentric wheels (51) rotate synchronously; Before cable passing, on the projection plane of the end face of the cable-passing hole (2) in a top view, the projection of the guiding block (4) below the hinge axis is located inside the cable-passing hole (2). When passing the cable, the stay cable (1) abuts against the guiding block (4) below the hinge axis. As the stay cable (1) continues to move, the multiple guiding blocks (4) rotate to abut against the stay cable (1), and the sliding block (52) moves to make the eccentric wheel (51) abut against the flexible section of the stay cable (1). When the stay cable (1) moves, it drives the eccentric wheel (51) to rotate, and the two opposite eccentric wheels (51) cause the stay cable (1) to sway.

2. The installation structure of a cable-stayed bridge cable according to claim 1, characterized in that, A plurality of rollers (41) are arranged on the end face of the side of the guiding block (4) close to the cable-passing hole (2). The plurality of rollers (41) are arranged at equal intervals along the length direction of the guiding block (4). When passing the cable, the guiding block (4) is parallel to the cable-passing hole (2). In the top view projection, the projection of the side of the roller (41) close to the cable-passing hole (2) is located inside the cable-passing hole (2).

3. The installation structure of a cable-stayed bridge cable according to claim 1, characterized in that, A plurality of hinge rods (31) are arranged at the upper end of the limit component (3). Positioning blocks (32) are arranged on the hinge rods (31). The guiding blocks (4) are hinged on the hinge rods (31). A torsion spring (33) is arranged between the hinge rod (31) and the guiding block (4). One end of the torsion spring (33) is connected to the hinge rod (31), and the other end is connected to the guiding block (4). Before passing the cable, the torsion spring (33) drives the guiding block (4) to abut against the positioning block (32) to limit the outward rotation of the guiding block (4).

4. A cable-stayed cable installation structure for a bridge according to claim 1, characterized in that A chute (42) is formed on the side of the upper end of the guiding block (4) facing the cable-passing hole (2). The sliding block (52) is arranged in the chute (42). A telescopic rod (43) is arranged in the sliding groove. 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 chute (42). A connection port is arranged on the guiding block (4), and the connection port is communicated with the telescopic rod (43). A hydraulic pump is connected to the outside of the connection port to control the telescopic movement of the telescopic rod (43).

5. The installation structure of a cable-stayed bridge cable according to claim 4, characterized in that, The middle diameter of the eccentric wheel (51) is smaller than that of both ends, and a flexible pad (53) is arranged on the circumferential surface of the eccentric wheel (51).

6. The installation structure of a cable-stayed bridge cable according to claim 1, characterized in that, A lubricating component (6) is arranged on the side of the lower end of the guiding block (4) facing the cable-passing hole (2). The lubricating component (6) is used to apply a lubricating medium to the passing stay cable (1).

7. The installation structure of a cable-stayed bridge cable according to claim 6, characterized in that, The lubrication assembly (6) includes a lubricating cotton (61) and an oil collecting groove (62). The oil collecting groove (62) is arranged on the guiding block (4), the opening of the oil collecting groove (62) faces the cable threading hole (2), and the lubricating cotton (61) is arranged at the front end of the oil collecting groove (62).

8. A cable-stayed cable installation structure for a bridge according to claim 2, characterized in that, One side of the guiding block (4) facing the cable threading hole (2) is V-shaped. Both V-shaped surfaces of the guiding block (4) are in contact with the stay cable (1), and rollers (41) are arranged on both V-shaped surfaces.

9. The installation structure of a cable-stayed cable for a bridge according to claim 1, wherein, The limiting assembly (3) includes at least two arc-shaped limiting blocks (34) arranged around the axis of the cable threading hole (2), and a telescopic driving source (35) is arranged between adjacent limiting blocks (34).

10. A construction method for a stay cable of a bridge, characterized in that, Using the bridge stay cable installation structure according to any one of claims 1-9, it includes the following steps: S1. Sleeve the limiting assembly (3) on the front end of the cable threading hole (2) to fix the limiting assembly (3) on the cable threading hole (2), and a plurality of guiding blocks (4) are arranged obliquely. S2. The crane moves the stay cable (1) to the front end of the cable threading hole (2). The stay cable (1) moves towards the cable threading hole (2) along a plurality of guiding blocks (4). When the threaded section of the stay cable (1) abuts against the guiding block (4) below the hinge axis, a plurality of guiding blocks (4) rotate simultaneously, and a plurality of guiding blocks (4) simultaneously abut against the threaded section of the stay cable (1). S3. The stay cable (1) continues to move and the threaded section enters the cable threading hole (2). The eccentric wheel (51) abuts against the flexible section of the stay cable (1). When the stay cable (1) moves, the relative eccentric wheel (51) rotates to make the stay cable (1) shake, and the stay cable (1) continues to move. S4. Fix the stay cable (1) in the cable threading hole (2), unlock the limiting assembly (3), and remove the limiting assembly (3) from the cable threading hole (2) to complete the installation.

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