A device for monitoring the displacement of a conversion cable of a self-anchored suspension bridge system and a method of using the same

Abstract

This invention belongs to the field of construction technology for the conversion of self-anchored suspension bridge systems, and specifically relates to a device for monitoring cable displacement during the conversion of self-anchored suspension bridge systems and its usage method. The device includes multiple fixed supports, a positioning plate, and a displacement monitoring component. The displacement monitoring component includes a movable scale, a spring, and pointers. Slide rails are provided on both sides of the lower surface of the movable scale. The movable scale is slidably connected to the upper inner surface of the annular shell of the positioning plate via the slide rails. One end of the spring is fixedly connected to the positioning plate, and the other end is fixedly connected to the movable scale. The upper surface of the movable scale has graduation lines, and pointers are provided on the upper surface of the positioning plate near the positioning plate. This invention uses the positioning plate and pointers to achieve real-time monitoring of the movement of the movable scale along the slide rails, thereby measuring the displacement of the cables during the system conversion process. This significantly improves the measurement efficiency of the cable alignment during system conversion and reduces testing costs.

Description

Technical Field

[0001] This invention belongs to the field of construction technology for the conversion of self-anchored suspension bridge systems, and specifically relates to a device for monitoring the displacement of suspension cables during the conversion of self-anchored suspension bridge systems and its usage method. Background Technology

[0002] System conversion is a crucial step in the construction of self-anchored suspension bridges using the beam-first, cable-later method. During system conversion, both the main cable and the steel box girder undergo longitudinal deformation due to cable tensioning. Therefore, controlling the spatial attitude of the cables is a key and challenging aspect of achieving high construction accuracy in the superstructure. Currently, the main method for measuring and controlling the spatial attitude of the cables involves first using optical instruments to set up prisms at measurable points for measurement, and then calculating the cable center and cable guide center at the cable clamp using geometric relationships to determine the spatial attitude of the cables. Existing technologies have the following main drawbacks:

[0003] (1) The testing workload is large and the efficiency is low. Field measurement and indoor conversion need to be combined, and the cycle required to complete one round of evaluation is long, which usually cannot meet the progress requirements of sling tensioning.

[0004] (2) High testing costs. Traditional testing methods require instruments such as total stations and precision levels, and require two testers to work continuously, resulting in high equipment and manpower costs.

[0005] (3) The precision of measurement and control is insufficient. As the attitude of the sling changes continuously during the system conversion process, traditional methods can only measure under a few working conditions and cannot monitor the attitude of the sling in real time. Summary of the Invention

[0006] To address the aforementioned problems, the present invention aims to provide a device for monitoring the displacement of suspension cables during the system transition of a self-anchored suspension bridge and its usage method. This device uses a positioning disk pointer to monitor the movement of a movable dial along a slide rail in real time, thereby measuring the displacement of the cables during system transition. This enables real-time dynamic monitoring and precise control of the cable's spatial attitude, significantly improving the measurement efficiency of the cable alignment during system transition and reducing testing costs.

[0007] The technical solution of the present invention is as follows: a displacement monitoring device for a self-anchored suspension bridge system, comprising multiple fixed supports, a positioning disk, and a displacement monitoring component. The fixed supports are fixedly connected to the inner wall of the cable guide tube, and the positioning disk is fixedly connected above the fixed supports. The positioning disk is a circular shell with an opening on its side near the center of the ring. The displacement monitoring component includes a movable scale, springs on both sides of the movable scale, and pointers. The movable scale is circular, with the outer side of the circular scale located within the opening on the side of the circular shell of the positioning disk. Slide rails are provided on both sides of the lower surface of the movable scale, and the movable scale is slidably connected to the inner upper surface of the circular shell of the positioning disk via the slide rails. One end of each spring is fixedly connected to the inner side of the circular shell of the positioning disk away from the center of the ring, and the other end is fixedly connected to the outer side of the movable scale. A scale line is provided on the upper surface of the movable scale between the two springs, and pointers are provided on the upper surface of the positioning disk near the center of the circular shell of the positioning disk at both ends of the scale line.

[0008] The positioning plate includes two semicircular rings, and a perforated splicing plate is provided at the connecting end of the two semicircular rings. A bolt is provided in the reserved hole of the perforated splicing plate, and the bolt passes through the perforated splicing plate to fasten the two semicircular rings together.

[0009] The movable dial includes two semicircular rings, the inner diameter of which is the same as the outer diameter of the sling.

[0010] The fixed bracket includes, from top to bottom, a pipe opening fixing plate, an arc-shaped connecting plate, and a groove limiting plate connected in sequence. The pipe opening fixing plate has a groove with the opening facing downwards. The size of the opening is the same as the wall thickness of the cable guide. The arc-shaped surface of the arc-shaped connecting plate coincides with the inner arc surface of the cable guide.

[0011] The groove limiting plate has a connecting groove in the center, and the positioning plate has a positioning plate on the lower surface of the positioning plate. The positioning plate is inserted into the connecting groove of the groove limiting plate.

[0012] The extension direction of the slide rail coincides with the extension direction of the scale lines on the upper surface of the movable dial.

[0013] The fixed brackets are provided in four places, evenly distributed at 90° along the cable guide.

[0014] A method of using a displacement monitoring device for a self-anchored suspension bridge system's transition cable, comprising the following steps:

[0015] S1: Assemble two semi-circular rings into a positioning plate through a perforated splicing plate. During the assembly process, place the movable dial in the side opening of the circular shell of the positioning plate. The middle ring of the movable dial contacts the outer side of the sling. The positioning plate is connected to the movable dial through a spring and a lower longitudinal slide rail.

[0016] S2: Assemble the pipe opening fixing plate, arc-shaped connecting plate and groove limiting plate into a fixing bracket, and install the pipe opening fixing plate on the cable guide wall opening so that the fixing bracket is suspended on the inner wall of the cable guide.

[0017] S3: Insert the positioning plate below the positioning disk into the groove limiting plate and connect it to the fixed bracket. Fix one end of the spring to the side of the circular housing of the positioning disk away from the center of the ring, and fix the other end to the outside of the movable scale. Install pointers on the upper surface of the positioning disk at both ends of the scale line near the center of the circular ring of the positioning disk. Adjust the position of the movable scale to match the initial sling installation position.

[0018] S4: Record the initial installation position of the sling according to the position of the scale line indicated by the pointer. As the system conversion process proceeds, the sling drives the movable dial to move along the slide rail. According to the change in the position of the scale line indicated by the pointer, the displacement of the sling during the system conversion process can be monitored in real time.

[0019] The technical advantages of this invention are as follows: 1. This invention uses a positioning disk pointer to monitor the movement of a movable dial along a slide rail in real time, thereby measuring the displacement of the sling during system conversion. This enables real-time dynamic monitoring and precise control of the sling's spatial attitude, significantly improving the measurement efficiency of the sling's alignment during system conversion and reducing testing costs; 2. The sling displacement monitoring device of this invention has high testing efficiency. It eliminates the need to measure and calculate the center positions of the cable core and cable guide at the cable clamp each time. The real-time tilt angle of the sling can be easily obtained by reading the dynamic relative displacement of the sling at the cable guide opening; 3. The sling displacement monitoring device of this invention is simple to use and operate, requiring no continuous use of testing instruments and manpower, thus significantly reducing testing costs.

[0020] The following will provide further explanation in conjunction with the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a structural cross-sectional view of a self-anchored suspension bridge system cable displacement monitoring device according to an embodiment of the present invention.

[0022] Figure 2 This is an embodiment of the present invention. Figure 1 Schematic diagram of the AA section structure.

[0023] Figure 3 This is an embodiment of the present invention. Figure 1 Schematic diagram of the cross-sectional structure of the middle BB.

[0024] Figure 4 This is a schematic diagram of the structure of the fixed bracket according to an embodiment of the present invention.

[0025] Reference numerals in the attached drawings: 1-Cable guide; 2-Fixed bracket; 201-Pipe fixing plate; 202-Arc-shaped connecting plate; 203-Groove limiting plate; 3-Positioning plate; 4-Positioning plate; 5-Perforated splicing plate; 6-Bolt; 7-Spring; 8-Movable dial; 9-Hanging cable; 10-Scale line; 11-Pointer; 12-Slide rail; 13-Top plate of steel box girder. Implementation

[0026] Example 1 Figures 1-3 As shown, a displacement monitoring device for a self-anchored suspension bridge system includes multiple fixed supports 2, a positioning disk 3, and a displacement monitoring assembly. The fixed supports 2 are fixedly connected to the inner wall of the cable guide 1. The positioning disk 3 is fixedly connected above the fixed supports 2. The positioning disk 3 is a circular shell with an opening on one side near the center of the ring. The displacement monitoring assembly includes a movable scale 8, springs 7 on both sides of the movable scale 8, and a pointer 11. The movable scale 8 is circular, and the outer side of the circular ring of the movable scale 8 is located on the inner wall of the cable guide 1. Inside the side opening of the annular housing of the positioning disk 3, slide rails 12 are respectively provided on both sides of the lower surface of the movable scale 8. The movable scale 8 is slidably connected to the upper surface of the annular housing of the positioning disk 3 through the slide rails 12. One end of the spring 7 is fixedly connected to the side of the annular housing of the positioning disk 3 away from the center of the ring, and the other end is fixedly connected to the outside of the movable scale 8. The upper surface of the movable scale 8 between the two springs 7 is provided with scale lines 10. Pointers 11 are respectively provided on the upper surface of the positioning disk 3 near the center of the ring of the positioning disk 3 at both ends of the scale lines 10.

[0027] In practical use, the present invention assembles the pipe fixing plate 201, the arc-shaped connecting plate 202, and the groove limiting plate 203 into a fixed bracket 2. The pipe fixing plate 201 is installed on the wall of the cable guide 1, so that the fixed bracket 2 is suspended on the inner wall of the cable guide 1. The positioning plate 4 below the positioning disk 3 is inserted into the groove limiting plate 203 and connected to the fixed bracket 2. One end of the spring 7 is fixedly connected to the side of the circular housing of the positioning disk 3 away from the center of the ring, and the other end is fixedly connected to the outside of the movable scale 8. Pointers 11 are respectively installed on the upper surface of the positioning disk 3 at both ends of the scale line 10 near the center of the ring of the positioning disk 3. The position of the movable scale 8 is adjusted to match the initial installation position of the sling 9. The initial installation position of the sling 9 is recorded according to the position of the scale line 10 indicated by the pointer 11. As the system conversion process proceeds, the sling 9 drives the movable scale 8 to move along the slide rail 12. According to the change in the position of the scale line 10 indicated by the pointer 11, the displacement of the sling 9 during the system conversion process can be monitored in real time. This invention uses a positioning disk pointer to monitor the movement of a movable dial along a slide rail in real time, thereby measuring the displacement of the sling during system conversion. This enables real-time dynamic monitoring and precise control of the sling's spatial attitude, significantly improving the measurement efficiency of the sling's alignment during system conversion and reducing testing costs.

[0028] Example 2 Preferably, based on Example 1, in this example, the positioning disk 3 includes two semi-circular rings, and a perforated splicing plate 5 is provided at the connecting end of the two semi-circular rings. A bolt 6 is provided in the reserved hole of the perforated splicing plate 5, and the bolt 6 passes through the perforated splicing plate 5 to fasten the two semi-circular rings together.

[0029] In actual use, the two semicircular rings of the present invention are provided with a perforated splicing plate 5 at the connecting end, and a bolt 6 is provided in the reserved hole of the perforated splicing plate 5. The two semicircular rings are connected by bolt 6 and the connection is fastened.

[0030] Example 3 Preferably, based on Example 1 or Example 2, in this example, the movable dial 8 includes two semicircular rings, and the inner diameter of the center of the two semicircular rings is the same as the outer diameter of the sling 9.

[0031] In actual use, the movable dial 8 of the present invention includes two semicircular rings. The inner diameter of the center of the two semicircular rings is the same as the outer diameter of the sling 9. The change in the position of the movable dial 8 can represent the change in the position of the sling 9.

[0032] Example 4 Preferably, based on Example 1 or Example 3, such as Figure 4As shown, in this embodiment, the fixed bracket 2 includes, from top to bottom, a pipe opening fixing plate 201, an arc-shaped connecting plate 202, and a groove limiting plate 203 connected in sequence. The pipe opening fixing plate 201 is provided with a groove, the groove opening faces downward, and the opening size is the same as the wall thickness of the cable guide 1. The arc-shaped surface of the arc-shaped connecting plate 202 coincides with the inner arc surface of the cable guide 1.

[0033] In actual use, the pipe fixing plate 201 of the present invention is provided with a groove. The groove opens downward and the size of the opening is the same as the wall thickness of the cable guide 1. When in use, it can be directly hung on the inner wall of the cable guide 1, which is quick and convenient.

[0034] Example 5 Preferably, based on Example 1 or Example 4, in this example, the groove limiting plate 203 has a connecting groove at its center, the positioning plate 4 is provided on the lower surface of the positioning disk 3, and the positioning plate 4 is inserted into the connecting groove of the groove limiting plate 203.

[0035] In actual use, the positioning plate 4 of the present invention is connected to the groove of the groove limiting plate 203, and the connection or disassembly is simple and convenient.

[0036] Example 6 Preferably, based on Example 1 or Example 5, in this example, the extending direction of the slide rail 12 coincides with the extending direction of the scale line 10 on the upper surface of the movable scale 8.

[0037] In actual use, the extension direction of the slide rail 12 of this invention coincides with the extension direction of the scale line 10 on the upper surface of the movable dial 8. When the movable dial 8 moves along the slide rail 12, the change in position of the scale line 10 on the upper surface of the movable dial 8 indicated by the pointer 11 is the change in displacement of the sling 9. The pointer offset is read according to the initial installation position of the sling, and the initial offset angle of the sling can be calculated according to the longitudinal offset distance and the height of the main beam. When the sling is in the center position, the longitudinal offset distance is zero.

[0038] Example 7 Preferably, based on Example 1 or Example 6, in this example, the fixing bracket 2 is provided with four brackets, which are evenly distributed at 90° along the cable guide 1.

[0039] In actual use, the fixed bracket 2 of the present invention is provided with four brackets, which are evenly distributed at 90° along the cable guide 1 to ensure that the positioning plate 3 is connected and fixed when inserted.

[0040] Example 8: A method of using a displacement monitoring device for a self-anchored suspension bridge system's transition cable, comprising the following steps:

[0041] S1: Assemble two semi-circular rings into a positioning disk 3 through the perforated splicing plate 5. During the assembly process, place the movable scale 8 in the side opening of the circular shell of the positioning disk 3. The middle ring of the movable scale 8 contacts the outside of the sling 9. The positioning disk 3 is connected to the movable scale 8 through the spring 7 and the lower longitudinal slide rail 12.

[0042] S2: The pipe opening of the cable guide 1 is a certain distance higher than the top plate 13 of the steel box girder. The pipe opening fixing plate 201, the arc-shaped connecting plate 202 and the groove limiting plate 203 are assembled into a fixing bracket 2. The pipe opening fixing plate 201 is installed on the wall opening of the cable guide 1, so that the fixing bracket 2 is suspended on the inner wall of the cable guide 1.

[0043] S3: Insert the positioning plate 4 below the positioning disk 3 into the groove limiting plate 203 and connect it to the fixed bracket 2. Fix one end of the spring 7 to the side of the circular housing of the positioning disk 3 away from the center of the ring, and fix the other end to the outside of the movable scale 8. Install pointers 11 on the upper surface of the positioning disk 3 at both ends of the scale line 10 near the center of the ring of the positioning disk 3. Adjust the position of the movable scale 8 to match the initial installation position of the sling 9.

[0044] S4: Record the initial installation position of the sling 9 according to the position of the scale line 10 indicated by the pointer 11. As the system conversion process proceeds, the sling 9 drives the movable scale 8 to move along the slide rail 12. According to the change in the position of the scale line 10 indicated by the pointer 11, the displacement of the sling 9 during the system conversion process can be monitored in real time.

[0045] The sling displacement monitoring device provided in this embodiment of the invention is simple to operate, has high testing efficiency, low testing cost, and can realize dynamic monitoring of the total sling displacement during the system conversion process.

[0046] 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 changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for monitoring the displacement of transfer cables in a self-anchored suspension bridge system, characterized in that: The device includes multiple fixed supports (2), a positioning disk (3), and a displacement monitoring component. The fixed supports (2) are fixedly connected to the inner wall of the cable guide (1). The positioning disk (3) is fixedly connected above the fixed supports (2). The positioning disk (3) is a circular shell with an opening on one side near the center of the ring. The displacement monitoring component includes a movable scale (8), springs (7) on both sides of the movable scale (8), and a pointer (11). The movable scale (8) is circular. The outer side of the movable scale (8) is located inside the opening on the side of the circular shell of the positioning disk (3). Slide rails (12) are provided on both sides of the lower surface of the movable scale (8). The movable scale (8) is slidably connected to the upper inner surface of the circular shell of the positioning disk (3) via the slide rails (12). One end of the spring (7) is located inside the circular shell of the positioning disk (3) away from the ring. One side of the center is fixedly connected, and the other end is fixedly connected to the outside of the movable dial (8). The upper surface of the movable dial (8) between the two springs (7) is provided with scale lines (10). The upper surface of the positioning disk (3) corresponding to the two ends of the scale lines (10) is provided with pointers (11) on the side of the ring of the positioning disk (3). The fixed bracket (2) includes, from top to bottom, a pipe opening fixing plate (201), an arc-shaped connecting plate (202), and a groove limiting plate (203) connected in sequence. The pipe opening fixing plate (201) is provided with a groove. The groove opens downward and the size of the opening is the same as the wall thickness of the cable guide (1). The arc surface of the arc-shaped connecting plate (202) coincides with the inner arc surface of the cable guide (1). The groove limiting plate (203) is provided with a connecting groove in the center. The lower surface of the positioning disk (3) is provided with a positioning plate (4). The positioning plate (4) is inserted into the connecting groove of the groove limiting plate (203).

2. The device for monitoring the displacement of a self-anchored suspension bridge system's transition cable as described in claim 1, characterized in that: The positioning plate (3) includes two semi-circular rings. A perforated splicing plate (5) is provided at the connection end of the two semi-circular rings. A bolt (6) is provided in the reserved hole of the perforated splicing plate (5). The bolt (6) passes through the perforated splicing plate (5) to fasten the two semi-circular rings together.

3. The device for monitoring the displacement of a self-anchored suspension bridge system's transition cable as described in claim 1, characterized in that: The movable dial (8) includes two semicircular rings, the inner diameter of which is the same as the outer diameter of the sling (9).

4. The device for monitoring the displacement of a self-anchored suspension bridge system's transition cable as described in claim 1, characterized in that: The extension direction of the slide rail (12) coincides with the extension direction of the scale line (10) on the upper surface of the movable dial (8), and the accuracy of the scale line (10) is 1mm.

5. The device for monitoring the displacement of a self-anchored suspension bridge system's transition cable as described in claim 1, characterized in that: The fixed bracket (2) is provided in four parts, which are evenly distributed at 90° along the cable guide (1).

6. A method of using a displacement monitoring device for a self-anchored suspension bridge system's transition cable, comprising using the displacement monitoring device for a self-anchored suspension bridge system's transition cable as described in any one of claims 1 to 5, characterized in that: Includes the following steps: S1: Assemble two semi-circular rings into a positioning plate (3) through a perforated splicing plate (5). During the assembly process, place the movable dial (8) inside the side opening of the circular shell of the positioning plate (3). The middle ring of the movable dial (8) contacts the outer side of the sling (9). The positioning plate (3) is connected to the movable dial (8) through a spring (7) and a lower longitudinal slide rail (12). S2: Assemble the pipe opening fixing plate (201), the arc-shaped connecting plate (202) and the groove limiting plate (203) into a fixing bracket (2), install the pipe opening fixing plate (201) on the wall of the cable guide (1) so that the fixing bracket (2) is suspended on the inner wall of the cable guide (1); S3: Insert the positioning plate (4) below the positioning disk (3) into the groove limiting plate (203) and connect it to the fixed bracket (2). Fix one end of the spring (7) to the side of the circular shell of the positioning disk (3) away from the center of the ring, and fix the other end to the outside of the movable scale (8). Install pointers (11) on the upper surface of the positioning disk (3) at both ends of the scale line (10) near the center of the ring of the positioning disk (3). Adjust the position of the movable scale (8) to match the initial installation position of the sling (9). S4: Record the initial installation position of the sling (9) according to the position of the scale line (10) pointed to by the pointer (11). As the system conversion process proceeds, the sling (9) drives the movable scale (8) to move along the slide rail (12). According to the position change of the scale line (10) pointed to by the pointer (11), the displacement of the sling (9) during the system conversion process can be monitored in real time.

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