Steel arch bridge construction period whole process stress monitoring equipment

Abstract

The utility model discloses steel arch bridge construction period whole process stress monitoring equipment, including two right angle boards, the upper surface of two right angle boards is fixedly connected with strain gauge together, the right side of each right angle board is fixedly connected with a group of light pole, the outer surface of each group light pole is slidably connected with screw block, the bottom of each screw block is fixedly connected with first connecting plate, the outer surface of each first connecting plate and the outer surface of each right angle board are fixedly connected with a group of slide cylinder. The device provides the initial adsorption positioning through the magnetic force of the strong magnetic plate, rotates the threaded rod, makes the corresponding strong magnetic plate close to each other, the slide bar slides in the slide cylinder and extrudes the elastic member, makes the elastic member produce the elastic pre -tightening force, forms the double fixed effect, can effectively resist the construction vibration, the wind power and other external force, prevents the equipment loose and falls off, and need not punching or welding, avoids the damage steel arch structure, removes after no residual trace, is suitable for the protection requirement of construction period structure.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction equipment technology, and in particular to stress monitoring equipment for the entire construction process of steel arch bridges. Background Technology

[0002] A steel arch bridge is a type of arch bridge that uses steel as its main load-bearing component. It transforms the load into axial pressure through the arch ring or arch ribs and transmits it to the supports at both ends. It is a modern bridge form that combines high strength and beautiful shape. Because the construction process of a steel arch bridge involves many key procedures such as segmental assembly, temporary support erection, gradual application of load, and system conversion, the stress state of the structure changes dynamically with the construction progress. It is prone to safety hazards such as structural cracking and support instability due to local stress concentration and deformation exceeding tolerance. Therefore, stress monitoring is required during the construction period to ensure the safety of the project.

[0003] Currently, stress monitoring equipment is typically fixed using bolts or welding. However, bolt fixing requires on-site drilling, which is cumbersome and damages the steel arch structure. Welding can create a heat-affected zone, which can impair the mechanical properties of the steel and leave weld marks after disassembly. Therefore, we propose a full-process stress monitoring device for steel arch bridges to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a stress monitoring device for the entire construction process of a steel arch bridge, in order to solve the problems mentioned in the background art.

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

[0006] A stress monitoring device for the entire construction process of a steel arch bridge includes two right-angle plates. A strain gauge is fixedly connected to the upper surface of both right-angle plates. A set of smooth rods is fixedly connected to the right side of each right-angle plate. A threaded block is slidably connected to the outer surface of each set of smooth rods. A first connecting plate is fixedly connected to the bottom surface of each threaded block. A set of sliding cylinders is fixedly connected to the outer surface of each first connecting plate and the outer surface of each right-angle plate. A sliding rod is slidably connected to the inner wall of each sliding cylinder. An elastic element is fixedly connected to the outer surface of each sliding rod. The outer surface of each elastic element is fixedly connected to the inner wall of each sliding cylinder. A second connecting plate is fixedly connected to the outer surface of each set of sliding rods. A strong magnetic plate is fixedly connected to the outer surface of each second connecting plate.

[0007] In a further embodiment, a bearing is embedded on the right side of each right-angle plate, and a threaded rod is fixedly connected to the inner ring of each bearing.

[0008] In a further embodiment, each of the threaded rods is threadedly connected to each threaded block, and a handwheel is fixedly connected to the right side of each of the threaded rods.

[0009] In a further embodiment, each of the threaded rods has a plurality of nuts threadedly connected to its outer surface, and each of the nuts has a washer on its outer surface.

[0010] In a further embodiment, a thin elastic pad is fixedly connected to the outer surface of each of the strong magnetic plates, and the outer surface of each thin elastic pad is provided with anti-slip texture.

[0011] In a further embodiment, the upper surfaces of the two right-angled plates are provided with a protective cover, and a handle is fixedly connected to the upper surface of the protective cover.

[0012] In a further embodiment, two second magnetic strips are fixedly connected to the bottom surface of the protective cover, and a first magnetic strip is fixedly connected to the outer surface of each right-angle plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This device uses the magnetic force of strong magnetic plates to provide initial adsorption and positioning. Rotating the threaded rod brings the corresponding strong magnetic plates closer together, and the sliding rod slides inside the sliding cylinder to compress the elastic element, causing the elastic element to generate elastic pre-tightening force, forming a double fixing effect. It can effectively resist external forces such as construction vibration and wind, prevent the equipment from loosening and falling off, and does not require drilling or welding, avoiding damage to the steel arch structure. There are no residual traces after disassembly, which is suitable for the protection requirements of the structure during the construction period. Attached Figure Description

[0015] Figure 1 This is a front-view three-dimensional structural diagram of the stress monitoring equipment used throughout the construction process of a steel arch bridge.

[0016] Figure 2 This is a top-section diagram of the protective cover in the stress monitoring equipment used throughout the construction of a steel arch bridge.

[0017] Figure 3 This is a three-dimensional structural diagram of the stress monitoring equipment used throughout the construction of a steel arch bridge, viewed from an elevation angle.

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the sliding cylinder in the stress monitoring equipment for the entire construction process of a steel arch bridge.

[0019] Figure 5 This is a side cross-sectional schematic diagram of the sliding cylinder in the stress monitoring equipment for the entire construction process of a steel arch bridge.

[0020] In the diagram: 1. Right-angle plate; 2. Strain gauge; 3. Smooth rod; 4. Threaded block; 5. First connecting plate; 6. Sliding cylinder; 7. Sliding rod; 8. Elastic element; 9. Second connecting plate; 10. Strong magnetic plate; 11. Bearing; 12. Threaded rod; 13. Handwheel; 14. Nut; 15. Washer; 16. Thin elastic pad; 17. Protective cover; 18. Handle; 19. Second magnetic strip; 20. First magnetic strip. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 In this utility model, a stress monitoring device for the entire construction process of a steel arch bridge includes two right-angle plates 1. Strain gauges 2 are fixedly connected to the upper surfaces of both right-angle plates 1. A set of smooth rods 3 are fixedly connected to the right side of each right-angle plate 1. A threaded block 4 is slidably connected to the outer surface of each set of smooth rods 3. A first connecting plate 5 is fixedly connected to the bottom surface of each threaded block 4. A set of sliding cylinders 6 are fixedly connected to the outer surface of each first connecting plate 5 and the outer surface of each right-angle plate 1. A sliding rod 7 is slidably connected to the inner wall of each sliding cylinder 6. An elastic element 8 is fixedly connected to the outer surface of each sliding rod 7. The outer surface of each elastic element 8 is fixedly connected to the inner wall of each sliding cylinder 6. A second connecting plate 9 is fixedly connected to the outer surface of each set of sliding rods 7. A strong magnetic plate 10 is fixedly connected to the outer surface of each second connecting plate 9. The strong magnetic plate 10 is attached to the surface of the steel arch bridge. Through the magnetic attraction of the strong magnetic plate 10, the strain gauges 2 are... This device is initially fixed to the surface of the steel arch bridge without any pretreatment of the steel arch structure. By squeezing the first connecting plate 5 and the right-angle plate 1, the sliding rod 7 moves inside the sliding cylinder 6. The elastic element 8 is squeezed, causing it to generate a reverse elastic pre-tightening force. This force makes the strong magnetic plate 10 fit more tightly against the surface of the steel arch. Through the magnetic attraction of the strong magnetic plate 10 and the pre-tightening force of the elastic element 8, a dual fixing effect can be formed, effectively resisting the loosening and falling off of the equipment caused by external forces such as construction vibration and wind. Moreover, no drilling or welding is required on the surface of the steel arch bridge during the entire installation process, which can effectively avoid damage to the steel arch structure. After disassembly, there are no residual marks on the surface of the steel arch bridge, which meets the protection requirements for the bridge structure during the construction period. The smooth rod 3 on the side of the right-angle plate 1 provides guidance for the movement of the threaded block 4, ensuring that the threaded block 4 is adjusted along the fixed trajectory, ensuring the accuracy of the application of the elastic pre-tightening force, and further improving the fixing stability.

[0023] Each right-angle plate 1 has a bearing 11 embedded on its right side. Each bearing 11 has a threaded rod 12 fixedly connected to its inner ring. Each threaded rod 12 is threadedly connected to each threaded block 4. Each threaded rod 12 has a handwheel 13 fixedly connected to its right side. Each threaded rod 12 has multiple nuts 14 threadedly connected to its outer surface. Each nut 14 has a washer 15 on its outer surface. By setting the handwheel 13, the torque of the threaded rod 12 can be amplified, making it easier to rotate. By rotating the threaded rod 12, under the guidance of the smooth rod 3, the threaded block 4 moves closer to or away from the right-angle plate 1, making it easier to compress the elastic element 8. The whole process does not require any additional tools and can be easily adjusted with just the handwheel 13, greatly reducing the difficulty of operation. By setting the nuts 14 and washer 15, after the threaded rod 12 stops rotating, rotating the nut 14 makes it fit tightly against the threaded block 4. The washer 15 will fill the gap between the nut 14 and the threaded block 4 and generate friction. The friction limits the self-rotation of the threaded rod 12, preventing the threaded rod 12 from loosening due to construction vibration.

[0024] Each strong magnetic plate 10 has a thin elastic pad 16 fixedly connected to its outer surface. Each thin elastic pad 16 has anti-slip textures on its outer surface. The upper surfaces of the two right-angle plates 1 share a protective cover 17. A handle 18 is fixedly connected to the upper surface of the protective cover 17, and two second magnetic strips 19 are fixedly connected to the bottom surface of the protective cover 17. Each right-angle plate 1 has a first magnetic strip 20 fixedly connected to its outer surface. By setting the thin elastic pads 16, they directly contact the surface of the steel arch. The elastic deformation buffers the hard contact between the strong magnetic plate 10 and the steel arch, preventing scratches on the steel arch surface. Simultaneously, the anti-slip textures increase the friction coefficient between the pad surface and the steel arch, preventing the equipment from sliding or shifting on the steel arch surface. When using the protective cover 17, it is placed over the outside of the strain gauge 2 to physically block construction. The protective cover 17 is designed to remove some dust, rainwater, gravel, and other debris, reducing the impact of the external environment on the strain gauge 2. The transparent design of the protective cover 17 allows operators to easily observe the working status of the strain gauge 2 at any time, enabling them to determine whether the equipment is operating normally without disassembly. The protective cover 17 has a handle 18 on the top, and a second magnetic strip 19 and a first magnetic strip 20 are respectively installed on the bottom and right-angle plate 1. During use, the protective cover 17 is quickly fixed by magnetic attraction. Disassembly is simple: just lift the handle 18 to remove it. After loosening the nut 14, turn the handwheel 13 in the opposite direction. The threaded block 4 moves away from the right-angle plate 1, the elastic element 8 returns to its original shape, and the strong magnetic plate 10 can easily separate from the surface of the steel arch. The entire disassembly and assembly process leaves no residue and does not damage the steel arch structure. No tools are required for disassembly and assembly, saving operation time and meeting the needs of frequent inspections during construction.

[0025] The working principle of this utility model is as follows:

[0026] When using this device, align the strong magnetic plate 10 with both sides of the steel arch bridge and use magnetic force to achieve initial fixation. No pre-treatment such as grinding or drilling of the steel arch structure is required to complete the initial positioning of the equipment. The thin elastic pad 16 on the outer surface of the strong magnetic plate 10 fits tightly against the surface of the steel arch. This not only buffers the hard contact between the strong magnetic plate 10 and the steel through its own elastic deformation, preventing scratches on the steel arch surface, but also increases the contact friction due to its anti-slip texture, initially preventing the equipment from sliding or shifting on the steel arch surface. Then, turn the handwheel 13 to rotate the threaded rod 12, causing the threaded block 4 to move horizontally along the smooth rod 3, pushing the first connecting plate 5 and the sliding cylinder 6 to move. The sliding rod 7 slides within the sliding cylinder 6 and compresses the elastic element 8 to generate an elastic preload. The force is transmitted to the second connecting plate 9 through the sliding rod 7, and finally acts on the strong magnetic plate 10, so that the strong magnetic plate 10 is pressed tightly against the surface of the steel arch with greater pressure, making the installation more secure. After the threaded rod 12 is adjusted into place, the nut 14 is rotated close to the threaded block 4, and the washer 15 will fill the gap and generate friction to prevent the threaded rod 12 from loosening. The stress or deformation generated by the steel arch bridge is transmitted to the strain gauge 2 through the right-angle plate 1. The stress change is monitored in real time through the matching data acquisition system. The protective cover 17 is fixed above the right-angle plate 1 by the magnetic attraction of the first magnetic strip 20 and the second magnetic strip 19, which can quickly complete the fixing of the protective cover 17, making it convenient for equipment inspection or disassembly and reducing the impact of the external environment on the protective strain gauge 2.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A stress monitoring device for the entire construction process of a steel arch bridge, characterized in that: It includes two right-angle plates (1), and strain gauges (2) are fixedly connected to the upper surfaces of the two right-angle plates (1). A set of light rods (3) is fixedly connected to the right side of each right-angle plate (1). A threaded block (4) is slidably connected to the outer surface of each set of light rods (3). A first connecting plate (5) is fixedly connected to the bottom surface of each threaded block (4). A set of sliding cylinders (6) is fixedly connected to the outer surface of each first connecting plate (5) and the outer surface of each right-angle plate (1). A sliding rod (7) is slidably connected to the inner side wall of each sliding cylinder (6). An elastic element (8) is fixedly connected to the outer surface of each sliding rod (7). The outer surface of each elastic element (8) is fixedly connected to the inner side wall of each sliding cylinder (6). A second connecting plate (9) is fixedly connected to the outer surface of each set of sliding rods (7). A strong magnetic plate (10) is fixedly connected to the outer surface of each second connecting plate (9).

2. The stress monitoring equipment for the entire construction process of a steel arch bridge according to claim 1, characterized in that: Each right-angle plate (1) has a bearing (11) embedded on its right side, and each bearing (11) has a threaded rod (12) fixedly connected to its inner ring.

3. The stress monitoring equipment for the entire construction process of a steel arch bridge according to claim 2, characterized in that: Each of the threaded rods (12) is threadedly connected to each threaded block (4), and a handwheel (13) is fixedly connected to the right side of each of the threaded rods (12).

4. The stress monitoring equipment for the entire construction process of a steel arch bridge according to claim 2, characterized in that: Each of the threaded rods (12) has a plurality of nuts (14) threaded to its outer surface, and each of the nuts (14) has a washer (15) on its outer surface.

5. The stress monitoring equipment for the entire construction process of a steel arch bridge according to claim 1, characterized in that: Each of the strong magnetic plates (10) has a thin elastic pad (16) fixedly connected to its outer surface, and each of the thin elastic pads (16) has anti-slip textures on its outer surface.

6. The stress monitoring equipment for the entire construction process of a steel arch bridge according to claim 1, characterized in that: The upper surfaces of the two right-angle plates (1) are provided with a protective cover (17), and a handle (18) is fixedly connected to the upper surface of the protective cover (17).

7. The stress monitoring equipment for the entire construction process of a steel arch bridge according to claim 6, characterized in that: Two second magnetic strips (19) are fixedly connected to the bottom surface of the protective cover (17), and a first magnetic strip (20) is fixedly connected to the outer surface of each right-angle plate (1).

Images