Arch rib linetype monitoring device of steel truss arch bridge

Abstract

The utility model discloses an arch rib linear monitoring device of a steel truss arch bridge, and belongs to the technical field of bridges. Comprising a mounting arch, a plurality of monitoring assemblies are arranged on the mounting arch, the monitoring assemblies are evenly distributed on the arc-shaped face of an arch rib, each monitoring assembly comprises a mounting rod, and a first rotating rod and a second rotating rod which are arranged side by side are arranged on each mounting rod; one end of the first rotating rod and one end of the second rotating rod are both rotationally connected to the mounting rod, the other end of the first rotating rod and the other end of the second rotating rod are both fixedly connected to the arc-shaped face of the arch rib, the ends, connected with the arch rib, of the first rotating rod and the second rotating rod are provided with mounting intervals, and the mounting rod is provided with a distance sensor. And the distance sensor is used for measuring the distance between the mounting rod and the arc-shaped surface of the arch rib. According to the technical scheme, the problems that in the prior art, when the arch rib line type is monitored through a total station, using limitation is large, and the monitoring effect is poor are solved.

Description

Technical Field

[0001] This utility model belongs to the field of bridge technology, specifically relating to a monitoring device for the arch rib alignment of a steel truss arch bridge. Background Technology

[0002] The arch ribs have been widely used in bridges spanning rivers and seas. However, during the long-term use of a bridge, the arch rib alignment is affected by various factors, such as vehicle loads, temperature changes, wind loads, and earthquakes. These factors can lead to deformation and displacement of the arch ribs, thereby affecting the bridge's performance and safety. Therefore, real-time monitoring of the arch rib alignment of steel truss arch bridges is of great significance for ensuring the safe operation of the bridge and extending its service life.

[0003] Traditional arch rib alignment monitoring typically employs a total station. The procedure involves attaching reflective sheets to the side of the arch rib, establishing a reference point near the construction site from the bridge site control point, and setting up the total station at that reference point. Changes in the arch rib's alignment are then obtained by measuring or monitoring the reflective sheets. However, this method has several limitations. For example, the measurement error of the total station itself may be amplified over long distances, affecting the accuracy of the monitoring results. Furthermore, in poor visibility conditions such as heavy fog or heavy rain, the total station may be unable to effectively measure the reflective sheets, leading to monitoring interruptions. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a monitoring device for the arch rib alignment of a steel truss arch bridge, so as to solve the problem that the existing technology of using a total station to monitor the arch rib alignment has great limitations and poor monitoring effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A monitoring device for the arch rib alignment of a steel truss arch bridge includes an arch mounting system. Several monitoring components are mounted on the arch mounting system and evenly distributed on the arcuate surface of the arch rib. Each monitoring component includes a mounting rod with a first rotating rod and a second rotating rod arranged side-by-side. One end of each of the first and second rotating rods is rotatably connected to the mounting rod, and the other end is fixedly connected to the arcuate surface of the arch rib. An installation gap is provided at the ends of the first and second rotating rods connected to the arch rib. A distance sensor is mounted on the mounting rod to measure the distance between the mounting rod and the arcuate surface of the arch rib. A rotation limiting component is mounted on the end of the mounting rod and fixed to the arch mounting system to limit the rotational freedom of the mounting rod. The device also includes a processing terminal electrically connected to the distance sensor among the monitoring components via a wire.

[0007] Furthermore, a baffle is provided at the end of the mounting rod, and a retaining ring is provided on the mounting rod. Both the baffle and the retaining ring are fixed to the mounting rod, and the ends of the first rotating rod and the second rotating rod are rotatably disposed between the baffle and the retaining ring.

[0008] Furthermore, the rotation limiting assembly includes a vertical rod, one end of which is fixed to the mounting arch, and the other end of which is provided with a U-shaped rod. The closed end of the U-shaped rod is fixed to the vertical rod, and a slider is slidably sleeved on the U-shaped rod. The end of the mounting rod is fixedly connected to the slider.

[0009] Furthermore, a retaining ring is attached to the open end of the U-shaped rod, and the retaining ring is fixed to the U-shaped rod.

[0010] Furthermore, a spring is sleeved on the U-shaped rod, and the two ends of the spring are respectively fixed to the slider and the retaining ring.

[0011] Furthermore, the spring is a plastic spring.

[0012] Furthermore, a protective cover is provided on the outside of the monitoring component.

[0013] The beneficial effects of this utility model are as follows:

[0014] This technical solution converts the surface curvature change when the arch rib changes shape into a height change of the components installed on the arch rib. By monitoring and collecting the height change value through a distance sensor, the change in the arch rib shape can be obtained by analyzing the height data. Thus, this device can monitor the change in the arch rib shape in real time. The device is simple, ingenious in principle, highly stable in use, and has good detection effect.

[0015] Other advantages, objectives, and features of this invention will be set forth in the following description and will be apparent to those skilled in the art to some extent, or may be learned by practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0016] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0017] Figure 1 This is a three-dimensional schematic diagram of the monitoring component installed on the arch rib in Embodiment 1 of this utility model;

[0018] Figure 2 This is a three-dimensional schematic diagram of the monitoring component in Embodiment 1 of this utility model;

[0019] Figure 3This is a three-dimensional schematic diagram of the monitoring component installed on the arch rib in Embodiment 2 of this utility model;

[0020] Figure 4 This is a schematic diagram of the monitoring component in Embodiment 3 of the present invention, which contains only one rotating rod.

[0021] The following labels are shown in the attached diagram:

[0022] 1. Arch rib; 2. Monitoring component; 3. Mounting rod; 4. Baffle; 5. Retaining ring; 6. First rotating rod; 7. Second rotating rod; 8. Distance sensor; 9. Upright pole; 10. U-shaped rod; 11. Slider; 12. Spring; 13. Retaining ring; 14. Processing terminal; 15. Wire; 16. Mounting arch. Detailed Implementation

[0023] Example 1

[0024] like Figure 1 and Figure 2 As shown, a linear monitoring device for the arch rib 1 of a steel truss arch bridge includes an installation arch 16. The installation arch 16 can be positioned above or on the outer side of the arch rib 1, depending on the actual situation. Both ends of the installation arch 16 should be fixed to the concrete foundations at both ends of the bridge to ensure that the height of the installation arch 16 does not change, thus avoiding deformation of the installation arch 16 due to bridge deformation. Several monitoring components 2 are provided on the installation arch 16, evenly distributed on the arc-shaped surface of the arch rib 1. Each monitoring component 2 includes an installation rod 3, on which a first rotating rod 6 and a second rotating rod 7 are arranged side-by-side. One end of each of the first rotating rod 6 and the second rotating rod 7 is rotatably connected to the installation rod 3, and the other end of each is fixedly connected to... The first rotating rod 6 and the second rotating rod 7 are connected to the arc-shaped surface of the arch rib 1, and an installation gap is provided at the end where they are connected to the arch rib 1. Of course, the size of the installation gap can be set according to the actual situation, which will not be elaborated here. The mounting rod 3 is equipped with a distance sensor 8, which is used to measure the distance between the mounting rod 3 and the arc-shaped surface of the arch rib 1. The end of the mounting rod 3 is equipped with a rotation limiting component, which is fixed to the mounting arch 16 to limit the rotational freedom of the mounting rod 3. It also includes a processing terminal 14 (prior art), which is electrically connected to the distance sensor 8 in several monitoring components 2 through a wire 15. The processing terminal 14 is used to receive the monitoring data from the height sensor, analyze the monitoring data, and then determine whether the arch rib 1 has deformed.

[0025] The working principle of the above technical solution is as follows:

[0026] When the shape (arc shape) of the arch rib 1 changes (deforms), since one end of the first rotating rod 6 and the second rotating rod 7 in a monitoring component 2 are fixed to the arch rib 1, when the arch rib 1 deforms (the surface curvature increases or decreases), the fixed ends of the first rotating rod 6 and the second rotating rod 7 will change with the curvature of the arch rib 1 surface. Therefore, the distance between the two fixed ends on the horizontal plane will change, which will drive the first rotating rod 6 and the second rotating rod 7 to rotate. When the first rotating rod 6 and the second rotating rod 7 rotate, since one end of them is fixed to the arch rib 1, the height of their other ends will inevitably change to accommodate the movement of the ends of the first rotating rod 6 and the second rotating rod 7 fixed to the arch rib 1 closer or further away. The position of the mounting arch 16 does not change, so the height of the mounting rod 3 will also change, which will in turn change the monitoring data of the distance sensor 8. Then, the processing terminal 14 will make a judgment to monitor the change in the shape of the arch rib 1 and ensure the safety of the bridge.

[0027] It should be noted that the distance sensor 8 can be any existing sensor capable of data transmission, such as a laser rangefinder. At the same time, the processing terminal 14 and data processing and analysis are also existing technologies, and will not be elaborated on here.

[0028] In one feasible embodiment, a baffle 4 is provided at the end of the mounting rod 3, and a retaining ring 5 is provided on the mounting rod 3. Both the baffle 4 and the retaining ring 5 are fixed to the mounting rod 3. The ends of the first rotating rod 6 and the second rotating rod 7 are rotatably disposed between the baffle 4 and the retaining ring 5. The baffle 4 and the retaining ring 5 limit the first rotating rod 6 and the second rotating rod 7, allowing them to rotate but preventing them from sliding. This rotatable connection method is simple, practical, and reliable. Of course, the first rotating rod 6 and the second rotating rod 7 can also be rotatably connected to the mounting rod 3 by bearings, which will not be elaborated further here.

[0029] In one feasible embodiment, the rotation limiting assembly includes a pole 9, one end of which is fixed to a mounting arch 16, and a U-shaped rod 10 is provided on the other end of the pole 9. The closed end of the U-shaped rod 10 is fixed to the pole 9, and a slider 11 is slidably sleeved on the U-shaped rod 10. The end of the mounting rod 3 is fixedly connected to the slider 11.

[0030] The slider 11 is provided with a through hole and is slidably sleeved on the U-shaped rod 10, so that the slider 11 can only move up and down and cannot rotate. This not only limits the rotation of the mounting rod 3, but also avoids the problem of the slider 11 rotating due to uneven force on the first rotating rod 6 and the second rotating rod 7, which would cause the distance sensor 8 to rotate, thus causing the position of the distance sensor 8 to shift, resulting in a change in the distance measurement base point and causing errors in the distance measurement.

[0031] In one feasible embodiment, a retaining ring 13 is attached to the open end of the U-shaped rod 10, which is fixed to the U-shaped rod 10 to prevent the slider 11 from coming off and to facilitate transportation.

[0032] In one feasible embodiment, a spring 12 is sleeved on the U-shaped rod 10. The two ends of the spring 12 are fixed to the slider 11 and the retaining ring 13, respectively. The spring 12 can press down the slider 11, thereby pressing down the mounting rod 3, so that the mounting rod 3 contacts the lower end of the through hole provided at the end of the first rotating rod 6 and the second rotating rod 7, thereby ensuring the contact effect and ensuring the response speed when the first rotating rod 6 and the second rotating rod 7 rotate, thereby improving the measurement accuracy.

[0033] In one feasible embodiment, the spring 12 is a plastic spring 12, which is not easy to rust and has a long service life. At the same time, the monitoring component 2 is provided with a protective cover on the outside to shield against rain and dust, so as to avoid affecting the rotation and movement of the internal components.

[0034] It should be further explained that, due to the small installation gap between the ends of the first rotating rod 6 and the second rotating rod 7, when the arch rib 1 of the fixed area at the ends of the two deforms, since the area of ​​the fixed area is relatively small, the deformation on this area can be regarded as uniform, and the deformation of each time in this area is very small. Therefore, whether it is downward deformation (under pressure) or upward deformation (under compression), the moving distance of the ends of the first rotating rod 6 and the second rotating rod 7 is very close. Therefore, the displacement of the rotating ends of the first rotating rod 6 and the second rotating rod 7 can be regarded as equal, so the mounting rod 3 can be moved down or up without interference.

[0035] Example 2

[0036] like Figure 3 As shown, the difference between Embodiment 2 and Embodiment 1 is that the upright 9 is directly fixed to the arch rib 1. Since there is a difference between the distance that the mounting rod 3 moves when the first rotating rod 6 and the second rotating rod 7 rotate and the distance that the upright 9 moves when the arch rib 1 deforms, the data monitored by the distance sensor 8 will also change when the arch rib 1 deforms. Therefore, this setting method can also be used to monitor the line shape of the arch rib 1.

[0037] Example 3

[0038] like Figure 4As shown, the difference between Embodiment 3 and Embodiment 1 is that one of the first rotating rod 6 and the second rotating rod 7 in this technical solution is removed, that is, only the first rotating rod 6 and the second rotating rod 7 are retained. When the arch rib 1 deforms, it will also drive the first rotating rod 6 or the second rotating rod 7 to rotate, and it can also drive the mounting rod 3 to move, thereby realizing linear monitoring. Moreover, in this way, there will be no problem of the movement of the mounting rod 3 being blocked or interfered with due to the different displacement of the first rotating rod 6 and the second rotating rod 7, which can further improve the movement effect and monitoring effect of the mounting rod 3.

[0039] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. An arch rib line type monitoring device of a steel truss arch bridge, characterized by: The system includes an arch mounting system with several monitoring components evenly distributed on the arcuate surface of the arch rib. Each monitoring component includes a mounting rod with a first rotating rod and a second rotating rod arranged side-by-side. One end of each of the first and second rotating rods is rotatably connected to the mounting rod, and the other end is fixedly connected to the arcuate surface of the arch rib. An installation gap is provided at the ends of the first and second rotating rods connected to the arch rib. A distance sensor is provided on the mounting rod to measure the distance between the mounting rod and the arcuate surface of the arch rib. A rotation limiting component is provided at the end of the mounting rod and fixed to the arch mounting system to limit the rotational freedom of the mounting rod. The system also includes a processing terminal electrically connected to the distance sensor among the monitoring components via a wire.

2. The arch rib linear monitoring device of a steel truss arch bridge according to claim 1, characterized in that: The mounting rod has a baffle at its end and a retaining ring on it. Both the baffle and the retaining ring are fixed to the mounting rod. The ends of the first rotating rod and the second rotating rod are rotatably positioned between the baffle and the retaining ring.

3. The device according to claim 1, wherein the device is characterized by: The rotation limiting assembly includes a vertical rod, one end of which is fixed to the mounting arch, and a U-shaped rod is provided on the other end of the vertical rod. The closed end of the U-shaped rod is fixed to the vertical rod, and a slider is slidably sleeved on the U-shaped rod. The end of the mounting rod is fixedly connected to the slider.

4. The arch rib linear monitoring device of a steel truss arch bridge according to claim 3, characterized in that: A retaining ring is provided on the open end of the U-shaped rod, and the retaining ring is fixed to the U-shaped rod.

5. The device according to claim 4, wherein the device is characterized by: A spring is fitted onto the U-shaped rod, and the two ends of the spring are fixed to the slider and the retaining ring, respectively.

6. The arch rib linear monitoring device of a steel truss arch bridge according to claim 5, characterized in that: The spring is a plastic spring.

7. The arch rib linear monitoring device of a steel truss arch bridge according to claim 1, characterized in that: The monitoring component is equipped with a protective cover on its outside.

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