A monitoring and early warning system for the construction of super-long cantilever of railway cable-stayed bridge

Abstract

The present invention discloses a monitoring and early warning system for the construction of an extra-long cantilever of a railway cable-stayed bridge, comprising a left monitoring tube, a left sealed bottom cover being arranged at the bottom of the left monitoring tube, the left monitoring tube being fixedly connected to the left sealed bottom cover, a guide rod being arranged inside the left monitoring tube, the bottom end of the guide rod being fixedly connected to the center of the left sealed bottom cover, a guide tube being sleeved on the guide rod, the guide tube and the guide rod being slidably matched, a first cylindrical floating block being arranged above the guide tube, the center of the bottom surface of the first cylindrical floating block being connected to the top end of the guide tube through a universal joint, a solar power supply panel being arranged above the first cylindrical floating block, the present invention designs a monitoring and early warning system for the construction of an extra-long cantilever of a railway cable-stayed bridge, converts the inclination amplitude of the bridge cantilever into the pressure value of a pressure sensor, can quickly detect whether the bridge cantilever is tilted, and the greater the difference in the pressure value data sent back by the pressure sensor, the greater the degree of inclination, thereby issuing an early warning in time.

Description

Technical Field

[0001] The invention relates to the field of monitoring devices, and in particular to a monitoring and early warning system for the construction of an extra-long cantilever of a railway cable-stayed bridge. Background Art

[0002] A cable-stayed bridge, also known as a cable-stayed bridge, is a type of bridge where the main beam is directly pulled onto the bridge tower by many cables. It is a structural system composed of a pressure-bearing tower, tensioned cables, and a bending-bearing beam. It can be seen as a multi-span elastically supported continuous beam with cables replacing piers. It can reduce the bending moment in the beam body, lower the building height, reduce the structural weight, and save materials.

[0003] For example, the patent with publication number CN104452573A discloses a cable-stayed bridge structure and a cable-stayed bridge construction method. The cable-stayed bridge structure includes: a cap; a cable tower built on the cap; a cable-stayed bridge main beam cantilever formed by beam segments on both sides of the cable tower; and wind-resistant cables stretched between the preset beam segments on both sides of the cable-stayed bridge main beam cantilever and the cap. In the present invention, the presence of the wind-resistant cables provides additional elastic support and a more direct force transmission path, reduces the cantilever length of the structure, and improves the flutter stability.

[0004] The patent with publication number CN103147385B discloses a double-joined low-tower cable-stayed bridge, which is formed by double-joining and widening a single-cable-plane low-tower cable-stayed bridge; its construction method is to first build a single-cable-plane low-tower cable-stayed bridge as half of the new bridge, then build another single-cable-plane low-tower cable-stayed bridge as the other half of the new bridge, and finally splice the two single-cable-plane low-tower cable-stayed bridges into a double-cable-plane (wide) double-joined low-tower cable-stayed bridge. The overall design of the present invention is phased construction, which can not only alleviate the pressure of construction investment, but also meet the demand for traffic growth. For the reconstruction (expansion) of old bridges, it can also meet the demand for uninterrupted traffic during construction.

[0005] If the above-mentioned cable-stayed bridge and similar cable-stayed bridges involve the construction of super-long cantilevers, the cantilevers are prone to bending and deformation during and after the construction process, so it is necessary to monitor and warn of the bending and deformation. Summary of the invention

[0006] The purpose of the present invention is to provide a monitoring and early warning system for the construction of an ultra-long cantilever of a railway cable-stayed bridge, so as to solve the above-mentioned technical problems.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A monitoring and early warning system for the construction of an extra-long cantilever of a railway cable-stayed bridge comprises a left monitoring tube, a left sealed bottom cover is arranged at the bottom of the left monitoring tube, the left monitoring tube is fixedly connected to the left sealed bottom cover, a guide rod is arranged in the left monitoring tube, the bottom end of the guide rod is fixedly connected to the center of the left sealed bottom cover, a guide tube is sleeved on the guide rod, the guide tube and the guide rod are slidably matched, a first cylindrical floating block is arranged above the guide tube, the center of the bottom surface of the first cylindrical floating block is connected to the top end of the guide tube through a universal joint, a solar power supply panel is arranged above the first cylindrical floating block, the solar power supply panel is cylindrical, the bottom edge of the solar power supply panel is fixedly connected to the upper ends of a plurality of connecting rods, the lower end of the connecting rod is fixedly connected to the top of the first cylindrical floating block, an early warning mechanism is installed on the solar power supply panel, a left sealed top cover of transparent material is arranged at the top of the left monitoring tube, and the left sealed top cover is fixedly connected to the top of the left monitoring tube.

[0009] Preferably, the early warning mechanism comprises a small motor, the small motor is located between the solar power supply panel and the first cylindrical floating block, the small motor is fixedly connected to the solar power supply panel, and the small motor is electrically connected to the solar power supply panel.

[0010] Preferably, a bearing is provided through the center of the solar power supply panel, the outer ring of the bearing is fixedly connected to the solar power supply panel, the inner ring of the bearing is sleeved on the power output end of the small motor, the power output end is fixedly connected to the left end of the cross bar, the right end of the cross bar is fixedly connected to the lower end of the vertical bar, the upper end of the vertical bar is fixedly connected to the lower end of the first spring, and the upper end of the first spring is fixedly connected to the pressure sensor.

[0011] Preferably, a right monitoring tube is arranged on the right side of the left monitoring tube, and a connecting tube is arranged between the bottom of the left monitoring tube and the bottom of the right monitoring tube, the left end of the connecting tube is fixedly connected and connected to the bottom of the left monitoring tube, and the right end of the connecting tube is fixedly connected and connected to the bottom of the right monitoring tube.

[0012] Preferably, a right sealing top cover is provided on the top of the right monitoring tube, and the right monitoring tube is fixedly connected to the right sealing top cover, a right sealing bottom cover is provided on the bottom of the right monitoring tube, and the bottom of the right monitoring tube is fixedly connected to the right sealing bottom cover, a piston is provided in the right monitoring tube, and the edge of the piston is slidably matched with the inner wall of the right monitoring tube, a second spring is provided between the piston and the right sealing top cover, the lower end of the second spring is fixedly connected to the top of the piston, and the upper end of the second spring is fixedly connected to the right sealing top cover.

[0013] Preferably, both the left monitoring tube and the right monitoring tube are filled with water, and the water in the right monitoring tube is located below the piston.

[0014] Preferably, a water pipe is fixedly provided on the side of the right monitoring tube, the water pipe is connected to the inside of the right monitoring tube, and a sealing cap is threadedly connected to the right end of the water pipe.

[0015] Preferably, a sliding rod is provided in the left monitoring tube, the lower end of the sliding rod is fixedly connected to the left sealing bottom cover, the sliding rod is sleeved with a limiting tube, the limiting tube slidably cooperates with the sliding rod, and a second cylindrical floating block is fixedly sleeved on the limiting tube, and a gear is provided above the sliding rod, and the gear is fixedly sleeved on the left end of the rotating shaft, and the right end of the rotating shaft passes through the tube wall of the left monitoring tube and extends to the outside of the left monitoring tube, and the rotating shaft is rotatably connected to the left monitoring tube. A torsion spring is sleeved on the rotating shaft, one end of the torsion spring is fixedly connected to the left monitoring tube, and the other end of the torsion spring is fixedly connected to the rotating shaft, and a left limiting plate and a right limiting plate are provided on the right side of the torsion spring, and the left limiting plate and the right limiting plate are both fixedly sleeved on the rotating shaft, and a connecting rope is provided between the left limiting plate and the right limiting plate, one end of the connecting rope is fixedly connected to the rotating shaft, the connecting rope is wound around the rotating shaft, and the other end of the connecting rope passes through the right sealing top cover and is fixed to the top of the piston.

[0016] Preferably, the connecting rope is a steel wire rope.

[0017] Preferably, the edge of the top surface of the solar power supply panel is marked with numbers from one to fifty-nine at equal intervals along the circumference of the solar power supply panel.

[0018] The beneficial effects of the present invention are:

[0019] The present invention designs a monitoring and early warning system for the construction of an extra-long cantilever of a railway cable-stayed bridge, which converts the inclination amplitude of the bridge cantilever into the pressure value of a pressure sensor. It can quickly detect whether the bridge cantilever is tilted, and the greater the difference in the pressure value data sent back by the pressure sensor, the greater the degree of inclination, thereby issuing an early warning in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a monitoring and early warning system for the construction of an extra-long cantilever of a railway cable-stayed bridge according to the present invention;

[0021] Figure 2 A monitoring and early warning system for the construction of an ultra-long cantilever of a railway cable-stayed bridge according to the present invention Figure 1 A magnified schematic diagram of part A;

[0022] Figure 3 A monitoring and early warning system for the construction of an ultra-long cantilever of a railway cable-stayed bridge according to the present invention Figure 1 An enlarged schematic diagram of part B;

[0023] Figure 4 This is a schematic diagram of the connection between the first cylindrical floating block and the universal joint of a monitoring and early warning system for the construction of an ultra-long cantilever of a railway cable-stayed bridge according to the present invention;

[0024] Figure numerals: 1. left sealed top cover; 2. solar power supply panel; 3. connecting rod; 4. small motor; 5. first cylindrical floating block; 6. left monitoring tube; 7. guide tube; 8. guide rod; 9. left sealed bottom cover; 10. connecting rope; 11. right sealed top cover; 12. second spring; 13. piston; 14. sealing cap; 15. water pipe; 16. right monitoring tube; 17. right sealed bottom cover; 18. connecting pipe; 19. gear; 20. torsion spring; 21. left limit plate; 22. right limit plate; 23. rotating shaft; 24. sliding rod; 25. second cylindrical floating block; 26. limit tube; 27. pressure sensor; 28. first spring; 29. ​​vertical rod; 30. bearing; 31. power output end; 32. cross rod; 33. universal joint. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example 1

[0029] like Figure 1-4As shown, a monitoring and early warning system for the construction of an extra-long cantilever of a railway cable-stayed bridge comprises a left monitoring tube 6, a left sealed bottom cover 9 is arranged at the bottom of the left monitoring tube 6, the left monitoring tube 6 is fixedly connected to the left sealed bottom cover 9, a guide rod 8 is arranged in the left monitoring tube 6, the bottom end of the guide rod 8 is fixedly connected to the center of the left sealed bottom cover 9, a guide tube 7 is sleeved on the guide rod 8, the guide tube 7 and the guide rod 8 are slidably matched, a first cylindrical floating block 5 is arranged above the guide tube 7, the bottom center of the first cylindrical floating block 5 is connected to the top of the guide tube 7 through a universal joint 33, and the first cylindrical floating block 5 is provided with a first cylindrical floating block 5. A solar power panel 2 is arranged above the cylindrical floating block 5. The solar power panel 2 is cylindrical. The edge of the top surface of the solar power panel 2 is marked with numbers from one to fifty-nine at equal intervals along the circumference of the solar power panel 2. The edge of the bottom surface of the solar power panel 2 is fixedly connected to the upper ends of multiple connecting rods 3. The lower ends of the connecting rods 3 are fixedly connected to the top of the first cylindrical floating block 5. An early warning mechanism is installed on the solar power panel 2. A left sealing top cover 1 made of transparent material is arranged on the top of the left monitoring tube 6. The left sealing top cover 1 is fixedly connected to the top of the left monitoring tube 6, and the left monitoring tube 6 is filled with water.

[0030] The early warning mechanism includes a small motor 4, which is located between the solar power supply panel 2 and the first cylindrical floating block 5. The small motor 4 is fixedly connected to the solar power supply panel 2, and the small motor 4 is electrically connected to the solar power supply panel 2. A bearing 30 is arranged through the center of the solar power supply panel 2, and the outer ring of the bearing 30 is fixedly connected to the solar power supply panel 2. The inner ring of the bearing 30 is sleeved on the power output end 31 of the small motor 4, and the power output end 31 is fixedly connected to the left end of the cross bar 32, and the right end of the cross bar 32 is fixedly connected to the lower end of the vertical bar 29, and the upper end of the vertical bar 29 is fixedly connected to the lower end of the first spring 28, and the upper end of the first spring 28 is fixedly connected to the pressure sensor 27.

[0031] When in use, the device is fixed on the surface of the extra-long cantilever of the railway cable-stayed bridge. The first cylindrical floating block 5 floats on the water surface. Under the buoyancy of the water, the pressure sensor 27 is pressed against the left sealing top cover 1. The power output end 31 of the small motor 4 drives the pressure sensor 27 to slide on the bottom surface of the left sealing top cover 1 through the cross bar 32, the vertical bar 29, and the first spring 28. During the sliding process, since the pressure sensor 27 is under pressure, the pressure sensor 27 transmits the pressure data to the staff's mobile phone.

[0032] If the bridge cantilever tilts, for example, the bridge cantilever tilts to the right, resulting in the left side of the bridge cantilever being higher than the right side, the left sealed top cover 1 will tilt synchronously, and since the first cylindrical floating block 5 and the solar power panel 2 float on the water and remain horizontal, the right side of the solar power panel 2 is closer to the right side of the left sealed top cover 1. When the pressure sensor 27 rotates to the right side of the left sealed top cover 1, the pressure value sent back is larger, which means that the bridge cantilever is tilted at this time, and the greater the difference in the pressure value data sent back by the pressure sensor 27 on the left and right sides of the left sealed top cover 1, the greater the degree of tilt, thereby issuing an early warning in time.

[0033] Example 2

[0034] like Figure 1-4 As shown, in the case where other parts are the same as those of the embodiment 1, the difference between this embodiment and the embodiment 1 is that: a right monitoring tube 16 is arranged on the right side of the left monitoring tube 6, a connecting tube 18 is arranged between the bottom of the left monitoring tube 6 and the bottom of the right monitoring tube 16, the left end of the connecting tube 18 is fixedly connected to and communicated with the bottom of the left monitoring tube 6, and the right end of the connecting tube 18 is fixedly connected to and communicated with the bottom of the right monitoring tube 16. A right sealing top cover 11 is arranged on the top of the right monitoring tube 16, the right monitoring tube 16 is fixedly connected to the right sealing top cover 11, a right sealing bottom cover 17 is arranged on the bottom of the right monitoring tube 16, the bottom of the right monitoring tube 16 is fixedly connected to the right sealing bottom cover 17, a piston 13 is arranged in the right monitoring tube 16, the edge of the piston 13 is slidably matched with the inner wall of the right monitoring tube 16, a second spring 12 is arranged between the piston 13 and the right sealing top cover 11, the lower end of the second spring 12 is fixedly connected to the top of the piston 13, and the upper end of the second spring 12 is fixedly connected to the right sealing top cover 11. The right monitoring tube 16 is filled with water, and the water in the right monitoring tube 16 is located below the piston 13. A water pipe 15 is fixedly arranged on the side of the right monitoring tube 16, and the water pipe 15 is connected to the inside of the right monitoring tube 16. The right end of the water pipe 15 is threadedly connected with a sealing cap 14.

[0035] A slide bar 24 is provided in the left monitoring tube 6, the lower end of the slide bar 24 is fixedly connected to the left sealing bottom cover 9, a limit tube 26 is sleeved on the slide bar 24, the limit tube 26 slides with the slide bar 24, a second cylindrical floating block 25 is fixedly sleeved on the limit tube 26, a gear 19 is provided above the slide bar 24, the gear 19 is fixedly sleeved on the left end of the rotating shaft 23, the right end of the rotating shaft 23 passes through the wall of the left monitoring tube 6 and extends to the outside of the left monitoring tube 6, the rotating shaft 23 is rotatably connected to the left monitoring tube 6, and a torque is sleeved on the rotating shaft 23 Spring 20, one end of the torsion spring 20 is fixedly connected to the left monitoring tube 6, and the other end of the torsion spring 20 is fixedly connected to the rotating shaft 23. A left limit plate 21 and a right limit plate 22 are arranged on the right side of the torsion spring 20. The left limit plate 21 and the right limit plate 22 are both fixedly mounted on the rotating shaft 23. A connecting rope 10 is arranged between the left limit plate 21 and the right limit plate 22. One end of the connecting rope 10 is fixedly connected to the rotating shaft 23. The connecting rope 10 is wound on the rotating shaft 23, and the other end of the connecting rope 10 passes through the right sealing top cover 11 and is fixedly connected to the top of the piston 13.

[0036] The elastic force of the second spring 12 is slightly greater than the torsion force of the torsion spring 20. The second spring 12 can slowly push the piston 13 downward, so that the water in the right monitoring tube 16 enters the left monitoring tube 6 through the connecting tube 18, and when the piston 13 moves downward, the connecting rope 10 drives the rotating shaft 23 to rotate, so that the rotating shaft 23 drives the gear 19 to rotate synchronously.

[0037] As the water level in the left monitoring tube 6 continues to rise, the first cylindrical float 5 and the second cylindrical float 25 move up synchronously, and the second cylindrical float 25 drives the limiting tube 26 to move up synchronously, so that the limiting tube 26 is stuck in the tooth groove of the gear 19, so that the gear 19 no longer rotates, thereby preventing the piston 13 from moving downward, and preventing the water in the right monitoring tube 16 from entering the left monitoring tube 6.

[0038] When the water in the left monitoring tube 6 continues to decrease due to natural evaporation or other reasons, the water level in the left monitoring tube 6 drops, and the second cylindrical float 25 drops synchronously. The second cylindrical float 25 drives the limiting tube 26 to move downward synchronously, so that the limiting tube 26 is disengaged from the gear 19. At this time, the gear 19 can continue to rotate, and the piston 13 can continue to move downward to press the water in the right monitoring tube 16 into the left monitoring tube 6 through the connecting tube 18.

[0039] This cycle repeats itself, so that when the water level in the left monitoring tube 6 drops, it can be replenished in time, and the water level in the left monitoring tube 6 is always maintained at a certain height, so that the pressure sensor 27 can always be against the left sealing top cover 1.

[0040] Example 3

[0041] When other parts are the same as those in Example 2, the difference between this embodiment and Example 2 is that the connecting rope 10 is a steel wire rope. By using the connecting rope 10 made of steel wire, the strength of the connecting rope 10 can be improved, and the service life of the connecting rope 10 can be increased.

[0042] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A monitoring and early warning system for the construction of an extra-long cantilever of a railway cable-stayed bridge, characterized in that: The invention comprises a left monitoring tube (6), a left sealed bottom cover (9) is arranged at the bottom of the left monitoring tube (6), the left monitoring tube (6) is fixedly connected to the left sealed bottom cover (9), a guide rod (8) is arranged inside the left monitoring tube (6), the bottom end of the guide rod (8) is fixedly connected to the center of the left sealed bottom cover (9), a guide tube (7) is sleeved on the guide rod (8), the guide tube (7) and the guide rod (8) are slidably matched, a first cylindrical floating block (5) is arranged above the guide tube (7), and the center of the bottom surface of the first cylindrical floating block (5) is connected to the left sealed bottom cover (9) by a universal joint ( 33) is connected to the top of the guide tube (7), a solar power supply panel (2) is arranged above the first cylindrical floating block (5), the solar power supply panel (2) is cylindrical, the bottom edge of the solar power supply panel (2) is fixedly connected to the upper ends of a plurality of connecting rods (3), the lower ends of the connecting rods (3) are fixedly connected to the top of the first cylindrical floating block (5), an early warning mechanism is installed on the solar power supply panel (2), a left sealing top cover (1) made of a transparent material is arranged on the top of the left monitoring tube (6), and the left sealing top cover (1) is fixedly connected to the top of the left monitoring tube (6).

2. The monitoring and early warning system for the super-long cantilever construction of a railway cable-stayed bridge according to claim 1 is characterized by: The early warning mechanism comprises a small motor (4), the small motor (4) is located between the solar power supply panel (2) and the first cylindrical floating block (5), the small motor (4) is fixedly connected to the solar power supply panel (2), and the small motor (4) is electrically connected to the solar power supply panel (2).

3. The monitoring and early warning system for the super-long cantilever construction of a railway cable-stayed bridge according to claim 2 is characterized by: A bearing (30) is provided through the center of the solar power supply panel (2); the outer ring of the bearing (30) is fixedly connected to the solar power supply panel (2); the inner ring of the bearing (30) is sleeved on the power output end (31) of the small motor (4); the power output end (31) is fixedly connected to the left end of the cross bar (32); the right end of the cross bar (32) is fixedly connected to the lower end of the vertical bar (29); the upper end of the vertical bar (29) is fixedly connected to the lower end of the first spring (28); and the upper end of the first spring (28) is fixedly connected to the pressure sensor (27).

4. The monitoring and early warning system for the super-long cantilever construction of a railway cable-stayed bridge according to claim 3 is characterized by: A right monitoring tube (16) is arranged on the right side of the left monitoring tube (6), and a connecting tube (18) is arranged between the bottom of the left monitoring tube (6) and the bottom of the right monitoring tube (16); the left end of the connecting tube (18) is fixedly connected to and communicated with the bottom of the left monitoring tube (6), and the right end of the connecting tube (18) is fixedly connected to and communicated with the bottom of the right monitoring tube (16).

5. The monitoring and early warning system for the construction of an ultra-long cantilever of a railway cable-stayed bridge according to claim 4 is characterized by: A right sealing top cover (11) is arranged at the top of the right monitoring tube (16), and the right monitoring tube (16) is fixedly connected to the right sealing top cover (11). A right sealing bottom cover (17) is arranged at the bottom of the right monitoring tube (16), and the bottom of the right monitoring tube (16) is fixedly connected to the right sealing bottom cover (17). A piston (13) is arranged in the right monitoring tube (16), and the edge of the piston (13) is slidably matched with the inner wall of the right monitoring tube (16). A second spring (12) is arranged between the piston (13) and the right sealing top cover (11), and the lower end of the second spring (12) is fixedly connected to the top of the piston (13), and the upper end of the second spring (12) is fixedly connected to the right sealing top cover (11).

6. The monitoring and early warning system for the construction of an extra-long cantilever of a railway cable-stayed bridge according to claim 5, characterized in that: The left monitoring tube (6) and the right monitoring tube (16) are both filled with water, and the water in the right monitoring tube (16) is located below the piston (13).

7. A monitoring and early warning system for the construction of an ultra-long cantilever of a railway cable-stayed bridge according to claim 6, characterized in that: A water pipe (15) is fixedly arranged on the side of the right monitoring pipe (16), the water pipe (15) is communicated with the inside of the right monitoring pipe (16), and a sealing cap (14) is threadedly connected to the right end of the water pipe (15).

8. The monitoring and early warning system for the construction of an ultra-long cantilever of a railway cable-stayed bridge according to claim 7, characterized in that: A slide bar (24) is provided in the left monitoring tube (6), the lower end of the slide bar (24) is fixedly connected to the left sealing bottom cover (9), a limit tube (26) is sleeved on the slide bar (24), the limit tube (26) and the slide bar (24) are slidably matched, a second cylindrical floating block (25) is fixedly sleeved on the limit tube (26), a gear (19) is provided above the slide bar (24), the gear (19) is fixedly sleeved on the left end of the rotating shaft (23), the right end of the rotating shaft (23) passes through the wall of the left monitoring tube (6) and extends to the outside of the left monitoring tube (6), the rotating shaft (23) is rotatably connected to the left monitoring tube (6), and a gear (19) is sleeved on the rotating shaft (23). A torsion spring (20), one end of the torsion spring (20) is fixedly connected to the left monitoring tube (6), and the other end of the torsion spring (20) is fixedly connected to the rotating shaft (23). A left limit plate (21) and a right limit plate (22) are arranged on the right side of the torsion spring (20). The left limit plate (21) and the right limit plate (22) are both fixedly sleeved on the rotating shaft (23). A connecting rope (10) is arranged between the left limit plate (21) and the right limit plate (22). One end of the connecting rope (10) is fixedly connected to the rotating shaft (23), and the connecting rope (10) is wound on the rotating shaft (23). The other end of the connecting rope (10) passes through the right sealing top cover (11) and is fixedly connected to the top of the piston (13).

9. A monitoring and early warning system for the construction of an ultra-long cantilever of a railway cable-stayed bridge according to claim 8, characterized in that: The connecting rope (10) is a steel wire rope.

10. The monitoring and early warning system for the construction of an extra-long cantilever of a railway cable-stayed bridge according to claim 8, characterized in that: The edge of the top surface of the solar power supply panel (2) is marked with numbers from one to fifty-nine at equal intervals along the circumference of the solar power supply panel (2).

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