Spatial positioning device and method for cable sleeve of main girder of cable-stayed bridge

Abstract

The application discloses a spatial positioning device for a cable sleeve of a main girder of a cable-stayed bridge, which comprises a positioning steel bar assembly, a cross-shaped steel bar and a mirror structure, the positioning steel bar assembly comprises a steel bar, the two ends of the steel bar are fixedly welded with the cross-shaped steel bar, the steel bar is externally wrapped with a protective sleeve, and a track groove is formed in the protective sleeve. In the application, the positioning steel bar assembly is arranged and cooperated with the mirror structure, so that a ground staff can stand at a long distance and measure the spatial position coordinates of a cable sleeve positioning base point and the mirror by using a total station, the spatial positioning of the cable sleeve of the main girder of the cable-stayed bridge is realized, the precision and efficiency of the positioning of the cable sleeve are remarkably improved, the spatial positioning of the cable sleeve of the main girder of the cable-stayed bridge can be widely used, and the application has the advantages of convenient use, simple operation, low cost, time and labor saving and excellent effects.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a spatial positioning device and method for the cable sleeve of the main girder of a cable-stayed bridge. Background Technology

[0002] A cable-stayed bridge, also known as a skeletal-stayed bridge, is a type of bridge where numerous cables support the main girder, with the cables directly anchored to the bridge towers. It is a structural system composed of compression-bearing towers, tension-bearing cables, and bending-resistant girder sections. A cable-stayed bridge can be viewed as a multi-span, elastically supported continuous beam where cables replace piers. This structural system reduces the bending moment of the girder, lowers the building height, reduces structural weight, saves materials, and has a greater span capacity than beam bridges, making it the most prevalent type of long-span bridge. Cable-stayed bridges have various tower types, including A-type, inverted Y-type, H-type, and single-column types. Therefore, the spatial distribution of the cables connecting the towers and the main girder is also diverse, not simply a planar distribution. This makes the positioning and installation of the cable anchor sleeves on the main girder a consistently challenging aspect of cable-stayed bridge construction.

[0003] In existing technologies, commonly used methods for positioning cable sleeves on the main girder of cable-stayed bridges include: drawing the chord lines of each cable on the main girder (chordal method); arranging sleeves on the main girder according to the designed inclination angle (inclination angle method); and calculating the proportional distance between each cable and the main girder to determine the sleeve position. However, construction practice shows that when the cable stays are spatial cable surfaces and the bridge towers of cable-stayed bridges have complex structures, the positioning accuracy of these methods on the main girder cable sleeves is not high. The positioning accuracy of the cable sleeves directly affects the stress condition of the cable stays and the entire bridge. Therefore, we propose a spatial positioning device and method for cable sleeves on the main girder of cable-stayed bridges to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art, and to propose a spatial positioning device and method for the cable sleeve of the main beam of a cable-stayed bridge.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A spatial positioning device and method for the cable sleeve of the main girder of a cable-stayed bridge includes a positioning steel reinforcement assembly, cross-shaped steel reinforcement, and a reflector structure, wherein:

[0007] The positioning steel bar assembly includes steel bars, both ends of which are welded and fixed to cross-shaped steel bars. The steel bars are wrapped with a protective sleeve, and the protective sleeve has a track groove.

[0008] The reflector structure includes a prism rod with a prism mounted on it. A sleeve matching a reinforcing bar is fixedly connected to one side of the prism rod. It also includes an arc-shaped frame with a slide rail and a mounting frame slidably connected inside the slide rail. The mounting frame has a reflecting prism mounted on it, and extension rods are fixedly connected to both sides of the mounting frame. Permanent magnets are mounted on the extension rods. Matching buckles are rotatably connected to both ends of the arc-shaped frame. Pulleys are mounted on both the buckles and the arc-shaped frame. A traction rope is also mounted on one side of the arc-shaped frame. A tensioning component for limiting the mounting frame is mounted on the arc-shaped frame.

[0009] The tensioning assembly includes a shaft fixedly connected to an arc-shaped frame. A torsion spring is sleeved on the shaft, and a limiting block is slidably sleeved on the shaft. Both ends of the torsion spring are fixedly connected to the shaft and the limiting block, respectively. A pressure rod is fixedly connected to one side of the limiting block, and the pressure rod abuts against the mounting frame. A damping block is fixedly connected to the end of the limiting block away from the torsion spring. A friction block is rotatably connected to the arc-shaped frame via a one-way rotating shaft. The friction block abuts against the damping block. A circumferential groove is also formed on the side wall of the damping block, and a compression spring is fixedly connected in the groove. A wedge block is fixedly connected to the end of the compression spring away from the damping block. Multiple levers are fixedly connected to the pulley side near the shaft.

[0010] Preferably, a rotating frame is fixedly connected to the mounting frame, a balancing frame is rotatably connected to the rotating frame, and a counterweight is provided at the lower end of the balancing frame. The reflecting prism is fixedly connected to the balancing frame, a vertical rod is slidably connected to the rotating frame, a limit clip is provided at the upper end of the vertical rod, and a conical block is fixedly connected to the lower end of the vertical rod. The conical block is located between the pressure rod and the mounting frame.

[0011] Preferably, each of the positioning reinforcement components consists of four reinforcement bars of equal length, and the four reinforcement bars are parallel to each other along their axial direction, and the positioning reinforcement bars are distributed in a regular quadrilateral shape.

[0012] Preferably, a take-up shaft is provided at the end of the traction rope away from the arc-shaped frame, and a displacement sensor is provided on the take-up shaft.

[0013] Preferably, a spring clip is fixedly connected to one side of the take-up shaft.

[0014] Preferably, the limiting card is located below the rotating shaft of the rotating frame, and a rubber pad is provided on the upper surface of the limiting card.

[0015] Preferably, the cross-shaped reinforcing bars are welded to both ends of the positioning reinforcing bar assembly, and the intersection point of the cross-shaped reinforcing bars at one end is hinged and fixed to the positioning base point of the cable sleeve on the main beam of the cable-stayed bridge. The whole assembly consisting of the positioning reinforcing bar assembly and the cross-shaped reinforcing bars can be finely adjusted in space around this point.

[0016] A method for spatial positioning of cable sleeves for the main girder of a cable-stayed bridge, characterized by comprising:

[0017] S1. Use a total station to measure the spatial coordinates of the positioning base point of the cable sleeve on the main beam, and record it as O(x0,y0,z0).

[0018] S2. Use an electric welding device to weld the positioning steel bar assembly and the two cross-shaped steel bars into one piece. Mark the intersection points of the cross-shaped steel bars at both ends of the positioning steel bar assembly as F and F' respectively. Hinge and fix the intersection point F of the cross-shaped steel bars to the positioning base point O(x0,y0,z0) of the cable sleeve.

[0019] S3. Mark the four ends of the four reinforcing bars on the same side as the intersection point F' of the cross-shaped reinforcing bars as A, B, C, and D respectively. Place a reflecting prism with a prism rod of length h at each of the four reinforcing bar ends in sequence, and ensure that the prism is placed vertically by using the horizontal calibration bubble of the prism rod. Ground personnel use a total station to measure the position of the reflecting prism directly above points A, B, C, and D, and the measured coordinates are A(x). a ,y a ,z a -h),B(x b ,y b ,z b -h),C(x c ,y c ,z c -h),D(x d ,y d ,z d -h).

[0020] S4, according to A(x) a ,y a ,z a -h),B(x b ,y b ,z b -h),C(x c ,y c ,z c -h),D(x d ,y d ,z d -h) The spatial coordinates of the four points are used to calculate the normal vector of the cross section of the positioning rebar assembly. That is, the directional vectors of the positioning steel reinforcement assembly and the stay cable steel sleeve, as shown in formula [1].

[0021]

[0022] Then its unit normal vector The calculation formula is as follows:

[0023]

[0024] Given the length of the reinforcing bar is L and the positioning base point O(x0,y0,z0) of the stay cable sleeve, find the intersection point F'(x0,y0,z0) of the cross-shaped reinforcing bars. f ,y f ,z f The coordinates of ) can be calculated using formula [3]:

[0025]

[0026] S5. Calculate the theoretical coordinates (x, y) of the intersection point F' of the cross-shaped reinforcing bars. f1 ,y f1 ,z f1 ) and the calculated coordinates (x) f ,y f ,z f Compare the two values; if the difference is less than the limit ξ, for example, Δx = |x f -x fl If |<ξ, it means that the center point of the cable sleeve meets the positioning accuracy requirements; otherwise, repeat steps three and four to adjust the position of the positioning steel reinforcement assembly until the position of the intersection point F' of the cross steel reinforcement meets the accuracy requirements.

[0027] S6. Insert the stay cable sleeve into the positioning steel reinforcement assembly. At this time, the positioning steel reinforcement assembly is exactly connected to the inner wall of the stay cable sleeve. Tie the steel reinforcement on the main beam and pour concrete to make the stay cable sleeve and the main beam completely rigidly connected. Then, pull out the positioning steel reinforcement assembly and the cross steel reinforcement.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. This invention, by setting up a positioning steel bar assembly in conjunction with a reflecting prism structure, allows ground personnel to measure the spatial coordinates of the positioning base point of the cable-stayed bridge sleeve and the reflecting prism from a distance using a total station. This enables spatial positioning of the cable-stayed bridge main beam cable sleeve, significantly improving the accuracy and efficiency of cable sleeve positioning. It can be widely used in the spatial positioning of cable sleeves in cable-stayed bridge main beams and has excellent advantages such as ease of use, simple operation, low cost, and time and labor saving.

[0030] In addition, by setting up reflecting prisms, prism rods are used in conjunction with prisms to spatially locate the end position of the cable sleeve of the main beam of the cable-stayed bridge. The reflecting prisms set on the curved frame are used to move the curved frame along the cable sleeve during further measurement, and to take measurements at multiple positions, thereby obtaining more accurate and comprehensive spatial data, and facilitating the calculation of the deformation of the cable sleeve after erection, as well as further calculation and analysis of data such as stress analysis.

[0031] 2. In this invention, by setting up a tensioning component, when the position of the arc frame is adjusted by pulling the rope, the pulley drives the torsion spring to deform, causing it to convert part of the kinetic energy into elastic potential energy for storage. At the same time, the pressure rod can be moved away from the mounting frame, allowing the mounting frame to move on the arc frame. After the arc frame stops moving, the damping block makes the rebound time of the torsion spring longer, requiring a period of time to drive the pressure rod to press the mounting frame and fix it. During this period, the magnetic force of the permanent magnet causes the position of the mounting frame to change, ultimately achieving the position of the reflecting prism in the middle of two adjacent steel bars, thereby eliminating the positional displacement that occurs when the arc frame moves and the positional deviation of the reflecting prism caused by the deformation of the main beam cable sleeve end under force.

[0032] 3. This invention, by setting up a rotating frame in conjunction with a balancing frame, allows the rotating frame and counterweight to rotate freely while adjusting the position of the arc-shaped frame. This ensures that the reflecting prism remains horizontal even after the position of the arc-shaped frame is moved, thereby enabling high-precision long-distance measurements at different positions. Simultaneously, when the pressure rod presses the mounting frame, the pressure rod, in conjunction with the conical block, drives the vertical rod upward, causing the limiting device to lock the rotating shaft of the main rotating frame, thus preventing the rotating frame from rotating and ensuring that the reflecting prism does not move freely during measurement, thereby improving the accuracy of the measurement results. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the positioning steel reinforcement assembly of a spatial positioning device for the cable sleeve of a cable-stayed bridge main beam, as proposed in this invention.

[0034] Figure 2 This is a schematic diagram of the positioning steel reinforcement assembly of a spatial positioning device for the cable sleeve of the main beam of a cable-stayed bridge, as proposed in this invention, from another perspective.

[0035] Figure 3 This is a schematic diagram of the arc-shaped frame structure of a spatial positioning device for the cable sleeve of the main beam of a cable-stayed bridge proposed in this invention;

[0036] Figure 4 This is a partial structural schematic diagram of a spatial positioning device for the cable sleeve of a cable-stayed bridge main beam proposed in this invention;

[0037] Figure 5This is a schematic diagram of the tensioning component structure of a spatial positioning device for the cable sleeve of a cable-stayed bridge main beam, as proposed in this invention.

[0038] Figure 6 This is a side sectional view of the arc-shaped frame structure of a spatial positioning device for the cable sleeve of the main beam of a cable-stayed bridge proposed in this invention.

[0039] In the diagram: 1. Cross-shaped reinforcing bars; 2. Reinforcing bars; 3. Protective sleeve; 4. Mirror rod; 5. Sleeve; 6. Arc-shaped frame; 7. Mounting frame; 8. Reflecting prism; 9. Extension rod; 10. Buckle; 11. Pulley; 12. Traction rope; 13. Shaft; 14. Torsion spring; 15. Limiting block; 16. Pressure rod; 17. Damping block; 18. Friction block; 19. Wedge block; 20. Lever; 21. Rotating frame; 22. Balancing frame; 23. Vertical rod; 24. Limiting clip; 25. Conical block; 26. Take-up spool; 27. Elastic clip. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0041] Reference Figure 1-6 A spatial positioning device for the cable sleeve of a cable-stayed bridge main girder includes a positioning steel reinforcement assembly, cross-shaped steel reinforcement 1, and a reflector structure, wherein:

[0042] The positioning steel bar assembly includes a steel bar 2, the two ends of which are welded and fixed to the cross-shaped steel bar 1. The steel bar 2 is wrapped with a protective sleeve 3, and the protective sleeve 3 is provided with a track groove.

[0043] The reflector structure includes a prism rod 4, on which a prism is mounted. A sleeve 5 matching the reinforcing bar 2 is fixedly connected to one side of the prism rod 4. The prism rod 4, in conjunction with the prism, is used to perform measurements at the top of the positioning device. As the main measuring and positioning device, it also includes an arc frame 6. A slide rail is mounted on the arc frame 6, and a mounting frame 7 is slidably connected inside the slide rail. A reflecting prism 8 is mounted on the mounting frame 7, and extension rods 9 are fixedly connected to both sides of the mounting frame 7. Permanent magnets are mounted on the extension rods 9. Both ends of the arc frame 6 are rotatably connected to matching buckles 10. Both the buckles 10 and the arc frame 6 are equipped with pulleys 11, and a traction rope 12 is also provided on one side of the arc frame 6. A tensioning component for limiting the mounting frame 7 is provided on the arc frame 6.

[0044] The tensioning assembly includes a shaft 13 fixedly connected to the arc-shaped frame 6. A torsion spring 14 is sleeved on the shaft 13, and a limiting block 15 is slidably sleeved on the shaft 13. The two ends of the torsion spring 14 are fixedly connected to the shaft 13 and the limiting block 15, respectively. A pressure rod 16 is fixedly connected to one side of the limiting block 15, and the pressure rod 16 abuts against the mounting frame 7. A damping block 17 is fixedly connected to the end of the limiting block 15 away from the torsion spring 14, and the arc-shaped frame 6 is rotatably connected via a one-way rotating shaft. A friction block 18 is attached, which is abutted against the damping block 17. The side wall of the damping block 17 is also provided with a groove, and a compression spring is fixedly connected in the groove. A wedge block 19 is fixedly connected to the end of the compression spring away from the damping block 17. The two sides of the wedge block 19 have different angles, so that when the arc frame 6 is stationary, the elastic force of the torsion spring 14 can drive the limiting shell and the damping block 17 to rotate. Multiple levers 20 are fixedly connected to the pulley 11 near the shaft 13.

[0045] Furthermore, a rotating frame 21 is fixedly connected to the mounting bracket 7, and a balancing frame 22 is rotatably connected to the rotating frame 21. A counterweight is provided at the lower end of the balancing frame 22. The reflecting prism 8 is fixedly connected to the balancing frame 22. A vertical rod 23 is slidably connected to the rotating frame 21. A limit clip 24 is provided at the upper end of the vertical rod 23, and a conical block 25 is fixedly connected to the lower end of the vertical rod 23. The conical block 25 is located between the pressure rod 16 and the mounting bracket 7. The limit clip 24 is located below the rotating shaft of the rotating frame 21, and a rubber pad is provided on the upper surface of the limit clip 24. In this design, it should be noted that the balance frame 22 consists of a support and a rotating shaft, while the limiting card 24 is located below the rotating shaft. The limiting card 24 can be used to lock the main rotating shaft, preventing the balance frame 22 from rotating freely. When the rotating shaft can rotate freely, the counterweight is used for counterweighting, ultimately ensuring that the reflecting prism 8 is in a horizontal state. Since the cable sleeve will bend and twist downwards after being erected due to the force and the different degrees of deformation at different positions, the angle of the reflecting prism 8 will change. Therefore, this design is adopted to achieve multi-point measurement and obtain richer and more accurate data.

[0046] Furthermore, each of the positioning steel bar assemblies consists of four steel bars 2 of equal length, and the four steel bars 2 are parallel to each other along their axial direction. The positioning steel bars 2 are distributed in a regular quadrilateral shape. This design is used to calculate the normal vector of the cross-section of the positioning steel bar assembly by using the spatial coordinates of four points.

[0047] Furthermore, a take-up shaft 26 is provided at the end of the traction rope 12 away from the arc frame 6, and a displacement sensor is provided on the take-up shaft 26. The take-up shaft 26 is used to pull the traction rope 12, and in conjunction with the displacement sensor, the moving distance of the arc frame 6 is calculated, thereby obtaining the relative position of the arc frame 6 and the end of the main beam cable sleeve after the main beam cable sleeve moves.

[0048] Furthermore, an elastic clip 27 is fixedly connected to one side of the take-up shaft 26. The elastic clip 27 is used to temporarily fix the take-up shaft 26 to the main beam cable sleeve, so as to facilitate the movement of the control arc frame 6.

[0049] Furthermore, the cross-shaped reinforcing bars 1 are welded to both ends of the positioning reinforcing bar assembly, and the intersection point of one end of the cross-shaped reinforcing bars 1 is hinged and fixed to the positioning base point of the cable sleeve on the main beam of the cable-stayed bridge. The whole assembly consisting of the positioning reinforcing bar assembly and the cross-shaped reinforcing bars 1 can be finely adjusted in space around this point.

[0050] A method for spatial positioning of cable sleeves for the main girder of a cable-stayed bridge, comprising:

[0051] S1. Use a total station to measure the spatial coordinates of the positioning base point of the cable sleeve on the main beam, and record it as O(x0,y0,z0).

[0052] S2. Use an electric welding device to weld the positioning steel bar assembly and the two cross-shaped steel bars 1 into one piece. Mark the intersection points of the cross-shaped steel bars 1 at both ends of the positioning steel bar assembly as F and F' respectively. Hinge and fix the intersection point F of the cross-shaped steel bars 1 to the positioning base point O(x0,y0,z0) of the cable sleeve.

[0053] S3. Mark the endpoints of the four reinforcing bars 2 on the same side as the intersection point F' of the cross-shaped reinforcing bars 1 as A, B, C, and D respectively. Place the reflecting prism 8, with a length of h on the prism rod 4, sequentially at the endpoints of the four reinforcing bars 2. Ensure the prism is vertically positioned using the horizontal calibration bubble of the prism rod 4. Ground personnel use a total station to measure the position of the reflecting prism 8 directly above points A, B, C, and D. The measured coordinates are A(x...). a ,y a ,z a -h),B(x b ,y b ,z b -h),C(x c ,y c ,z c -h),D(x d ,y d ,z d -h).

[0054] S4、A(x a ,ya ,z a -h),B(x b ,y b ,z b -h),C(x c ,y c ,z c -h),D(x d ,y d ,z d -h) The spatial coordinates of the four points are used to calculate the normal vector of the cross section of the positioning rebar assembly. That is, the directional vectors of the positioning steel reinforcement assembly and the stay cable steel sleeve, as shown in formula [1].

[0055]

[0056] The formula for calculating its unit normal vector is as follows:

[0057]

[0058] Given the length L of rebar 2 and the positioning base point O(x0,y0,z0) of the stay cable sleeve, find the intersection point F'(x0,y0,z0) of the cross-shaped rebar 1. f ,y f ,z f The coordinates of ) can be calculated using formula [3]:

[0059]

[0060] S5. Calculate the theoretical coordinates (x, y) of the intersection point F' of the cross-shaped reinforcing bars. f1 ,y f1 ,z f1 ) and the calculated coordinates (x) f ,y f ,z f Compare the two values; if the difference is less than the limit ξ, for example, Δx = |x f -x fl If |<ξ, it means that the center point of the cable sleeve meets the positioning accuracy requirements; otherwise, repeat steps three and four to adjust the position of the positioning steel reinforcement assembly until the position of the intersection point F' of the cross steel reinforcement 1 meets the accuracy requirements.

[0061] S6. Insert the stay cable sleeve into the positioning steel reinforcement assembly. At this time, the positioning steel reinforcement assembly is exactly connected to the inner wall of the stay cable sleeve. Tie the steel reinforcement 2 on the main beam and pour concrete to make the stay cable sleeve completely rigidly connected to the main beam. Then, pull out the positioning steel reinforcement assembly and the cross steel reinforcement 1.

[0062] In this invention, the prism rod 4, in conjunction with the prism, is used for positioning the cable-stayed sleeve during installation. The arc frame 6 and the components located on the arc frame 6 are used for further detection and positioning of the cable-stayed sleeve during its erection. The position of the arc frame 6 can be adjusted multiple times on the ground using the traction rope 12. The distance h2 from the reflecting prism 8 to the cable-stayed sleeve axis is calculated. Although the accuracy is slightly lower than that of the initial installation positioning, it is used to calculate the state of the cable-stayed sleeve after installation. Furthermore, the multi-point calculation not only corrects errors but also detects the deformation of the cable-stayed sleeve during erection. When the user drives the arc frame 6 to move using the traction rope 12, the pulley 11 rotates due to the friction between the pulley 11 and the cable-stayed sleeve. Simultaneously, when the pulley 11 near the shaft 13 rotates, the lever 20 can drive the wedge block 19 to move. The wedge block 19 then drives the damping block 17 to rotate, thereby causing the limiting block 15 to rotate synchronously. The torsion spring 14 also undergoes elastic deformation, continuing its elastic potential energy. As the torsion spring 14 rotates to a certain extent, the lever 20, under the resistance converted from the elastic potential energy of the torsion spring 14, can no longer cooperate with the wedge block 19 to drive the damping block 17 to rotate. Instead, the wedge block 19 overcomes the elastic force of the compression spring and moves towards the groove. On the other hand, in this state, after the limit block 15 rotates, the pressure rod 16 separates from the mounting frame 7, allowing the mounting frame 7 to slide freely on the arc frame 6. At this time, the user can use the traction rope 12 to adjust the position of the arc frame 6. After the position adjustment is completed, the arc frame 6 stops moving, and the elastic potential energy of the torsion spring 14 is converted into kinetic energy, driving the limit block 15 to rotate. Finally, the pressure rod 16 fixes the mounting frame 7 on the arc frame 6. The permanent magnet set on the extension rod 9 is used to attract the steel bar 2 inside the cable sleeve, so that the center position of the mounting frame 7 can be located directly above the cable sleeve, thereby improving the accuracy of the measurement data.

[0063] Based on this, by setting the rotating frame 21 on the mounting frame 7, when the rotating frame is not locked by the vertical rod 23, the balance frame 22 can remain vertical with the help of the counterweight. When the arc frame 6 stops moving, when the pressure rod 16 moves towards the mounting frame 7, the vertical rod 23 moves upward, thereby locking the rotating frame 21's axis of rotation, preventing the rotating frame 21 from rotating, and ensuring that the reflecting prism 8 remains horizontal. It should be noted that the purpose of setting the damping block 17 is to allow a period of time after the arc block stops moving before the pressure rod 16 can fix the mounting frame 7, ensuring that after the arc frame 6 stops moving, the mounting frame 7 and the balance frame 22 can remain vertical. After movement, the kinetic energy caused by inertia is consumed by friction, ultimately ensuring that the reflecting prism 8 is horizontally positioned directly above the cable sleeve. In this design, when the user performs spatial positioning of the cable sleeve of the main beam of the cable-stayed bridge, the arc frame 6 can be placed on the top of the cable sleeve, and then the position of the arc frame 6 can be adjusted on the ground using the traction rope 12 to achieve the purpose of multi-point positioning measurement. With this positioning device and positioning method, not only is the equipment simple and low-cost, but there is also no need for climbing. It can be widely used in the spatial positioning of the cable sleeve of the main beam of the cable-stayed bridge, and has the excellent effects of being easy to use, simple to operate, low cost, and saving time and effort.

[0064] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A spatial positioning device for the cable sleeve of the main girder of a cable-stayed bridge, characterized in that, Includes positioning steel reinforcement components, cross-shaped steel reinforcement (1), and a reflector structure, wherein: The positioning steel bar assembly includes a steel bar (2), and each end of the positioning steel bar assembly is welded and fixed to a cross-shaped steel bar (1). The steel bar (2) is wrapped with a protective sleeve (3), and the protective sleeve (3) has a track groove. The reflector structure includes a prism rod (4), on which a prism is provided, and a sleeve (5) matching the steel bar (2) is fixedly connected to one side of the prism rod (4). The reflector structure also includes an arc frame (6), on which a slide rail is provided, and a mounting frame (7) is slidably connected inside the slide rail. A reflective prism (8) is provided on the mounting frame (7), and extension rods (9) are fixedly connected to both sides of the mounting frame (7). Permanent magnets are provided on the extension rods (9). Both ends of the arc frame (6) are rotatably connected to matching buckles (10). Both the buckles (10) and the arc frame (6) are provided with pulleys (11). A traction rope (12) is also provided on one side of the arc frame (6). A tensioning component for limiting the mounting frame (7) is provided on the arc frame (6). The tensioning assembly includes a shaft (13) fixedly connected to the arc frame (6), a torsion spring (14) sleeved on the shaft (13), and a limiting block (15) slidably sleeved on the shaft (13). One end of the torsion spring (14) is fixedly connected to the shaft (13), and the other end is fixedly connected to the limiting block (15). A pressure rod (16) is fixedly connected to one side of the limiting block (15), and the pressure rod (16) abuts against the mounting frame (7). The limiting block (15) is away from the torsion spring (14). 14) One end is fixedly connected to a damping block (17), and a friction block (18) is rotatably connected to the arc frame (6) via a one-way rotating shaft. The friction block (18) abuts against the damping block (17). The side wall of the damping block (17) is also provided with a groove arranged around it, and a compression spring is fixedly connected in the groove. A wedge block (19) is fixedly connected to the end of the compression spring away from the damping block (17). Multiple levers (20) are fixedly connected to the pulley (11) near the shaft (13). A rotating frame (21) is fixedly connected to the mounting frame (7). A balancing frame (22) is rotatably connected to the rotating frame (21). A counterweight is provided at the lower end of the balancing frame (22). The reflecting prism (8) is fixedly connected to the balancing frame (22). A vertical rod (23) is slidably connected to the rotating frame (21). A limiter (24) is provided at the upper end of the vertical rod (23). A conical block (25) is fixedly connected to the lower end of the vertical rod (23). The conical block (25) is located between the pressure rod (16) and the mounting frame (7).

2. The spatial positioning device for the cable sleeve of the main beam of a cable-stayed bridge according to claim 1, characterized in that, Each of the positioning reinforcement components consists of four equal-length reinforcement bars (2), and the four reinforcement bars (2) are parallel to each other along their axial direction, and the positioning reinforcement bars are distributed in a regular quadrilateral shape.

3. The spatial positioning device for the cable sleeve of the main beam of a cable-stayed bridge according to claim 1, characterized in that, The end of the traction rope (12) away from the arc frame (6) is provided with a take-up shaft (26), and a displacement sensor is provided on the take-up shaft (26).

4. The spatial positioning device for the cable sleeve of the main beam of a cable-stayed bridge according to claim 3, characterized in that, One side of the take-up shaft (26) is fixedly connected to an elastic clip (27).

5. The spatial positioning device for the cable sleeve of the main beam of a cable-stayed bridge according to claim 1, characterized in that, The limiting card (24) is located below the rotating shaft of the rotating frame (21), and a rubber pad is provided on the upper surface of the limiting card (24).

6. The spatial positioning device for the cable sleeve of the main beam of a cable-stayed bridge according to claim 1, characterized in that, The intersection of the cross-shaped reinforcing bars (1) at one end of the positioning reinforcing bar assembly is hinged and fixed to the positioning base point of the cable sleeve on the main beam of the cable-stayed bridge. The entire assembly consisting of the positioning reinforcing bar assembly and the cross-shaped reinforcing bars (1) is adjusted in space around the positioning base point of the cable sleeve.

Images