Bridge expansion device easy to maintain

Abstract

The utility model discloses a bridge expansion device easy to maintain, which relates to the field of bridges, and comprises special-shaped section steel and beam bodies, anchoring steel bars are fixedly mounted on the outer sides of the special-shaped section steel, the anchoring steel bars are fixedly connected inside the beam bodies, the special-shaped section steel is arranged between the beam bodies, and the special-shaped section steel comprises a section steel body. A cavity is formed in the inner side of the profile steel body, and a rubber waterproof belt is movably installed on the inner side of the cavity. The waterproof belt body is clamped and fixed with the cavity between the waterproof belt type heads on the two sides of the waterproof belt body and the section steel body, inert gas is filled into the gas storage cavities of the waterproof belt type heads to reach a certain pressure, the waterproof belt type heads are tightly attached to the inner surface of the cavity and are clamped, and the waterproof belt type heads are fixed to the inner surface of the cavity. And during dismounting, inert gas in the gas storage cavity is discharged to separate the waterproof belt type head from the cavity, so that the waterproof belt type head can be easily separated and extracted from the cavity, the convenience of mounting, dismounting and replacing is improved, and the mounting quality is also ensured.

Description

Technical Field

[0001] The utility model relates to the field of bridges, and particularly relates to an easily maintainable bridge expansion device. Background Art

[0002] In actual use, since the bridge expansion device directly bears the repeated impact of wheel loads and is long-term exposed to outdoor harsh working environments such as wind, sun and rain, once there are slight defects, it will affect the bridge structure, reduce the comfort of passing, and cause potential safety hazards. The bridge expansion device, as a very important component in the bridge structure, plays an irreplaceable role.

[0003] Existing easily maintainable bridge expansion devices include ordinary expansion devices, replaceable expansion devices, elastomeric waterproof devices, etc. Among them, the ordinary expansion device is composed of weather-resistant steel, waterproof rubber bands, anchor steel bars, etc. When the waterproof rubber band ages and loses its original function, it cannot be replaced and maintained; for the replaceable expansion device, due to the aging or damage of the rubber band, when replacing the rubber band, and because of aging and losing elasticity, the removal becomes difficult, and even the removal is incomplete, resulting in the replaced rubber band not meeting its quality requirements or being unable to complete the replacement operation smoothly; while the elastomeric waterproof device uses two chemical components to generate an elastomer through a chemical reaction. It belongs to chemicals, has potential safety hazards, pollutes the environment, harms the human body, and has harsh storage conditions; during construction, on-site batching is required, and then it is bonded to the end face of the concrete beam body. Since they are two different materials, they are prone to cracking over time, and are not easy to maintain and replace, losing the waterproof function and causing damage to the beam body. Summary of the Utility Model

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] An easily maintainable bridge expansion device includes special-shaped steel and a beam body. Anchor steel bars are fixedly installed on the outer sides of the special-shaped steel, and the anchor steel bars are fixedly connected to the inside of the beam body. The special-shaped steel is arranged between the beam bodies. The special-shaped steel includes a steel body. A cavity is opened on the inner side of the steel body. A rubber waterproof band is movably installed inside the cavity. The rubber waterproof band includes a waterproof band body. Waterproof band heads are fixedly connected to the left and right sides of the waterproof band body. The waterproof band heads are movably clamped inside the cavity. An air storage cavity is arranged inside the waterproof band heads.

[0006] A further improvement of the technical solution of the utility model lies in that: the air storage cavity is arranged with a single-way opening, and an air nozzle corresponding to the air storage cavity is arranged on the outside of the waterproof band head.

[0007] A further improvement of the technical solution of the utility model lies in that: the steel bodies are arranged opposite to each other left and right between the beam bodies.

[0008] A further improvement of the technical solution of the present utility model lies in that: a mold release agent is coated on the outside of the waterproof strip-shaped head.

[0009] A further improvement of the technical solution of the present utility model lies in that: a beam embedded part is arranged inside the beam body, fixed horizontal steel bars and fixed vertical steel bars are arranged outside the beam embedded part, and the anchoring steel bars are fixedly connected to the beam embedded part.

[0010] A further improvement of the technical solution of the present utility model lies in that: the anchoring steel bars, the beam embedded part, the fixed horizontal steel bars and the fixed vertical steel bars are fixed by pouring cement.

[0011] A further improvement of the technical solution of the present utility model lies in that: a cover plate connecting piece is fixedly installed inside the beam body, and a ballast retaining cover plate located above the rubber waterproof strip is fixedly installed on the top of the cover plate connecting piece.

[0012] Due to the adoption of the above technical solution, the technical progress achieved by the present utility model compared with the prior art is:

[0013] The present utility model provides an easily maintainable bridge expansion device, which is fixed on a beam embedded part through anchoring steel bars connected to special-shaped steel and fixed by pouring cement. The waterproof strip body is tightly fixed by the cavity between the waterproof strip-shaped heads on both sides of it and the steel profile body, and by filling inert gas into the air storage cavity of the waterproof strip-shaped head to make it reach a certain pressure, so that the waterproof strip-shaped head is closely attached to and clamped with the inner surface of the cavity, preventing the waterproof strip-shaped head from falling off in the cavity. When disassembling, the waterproof strip-shaped head can be easily detached from the cavity by discharging the inert gas in the air storage cavity, improving the convenience of installation, disassembly and replacement, and also ensuring the installation quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the easily maintainable bridge expansion device of the present utility model;

[0015] Figure 2 is a schematic cross-sectional structural diagram of the present utility model;

[0016] Figure 3 is a schematic structural diagram of the porous rubber waterproof strip of the present utility model;

[0017] Figure 4 is a schematic structural diagram of the herringbone rubber waterproof strip of the present utility model.

[0018] In the figure: 1. Special-shaped steel; 11. Steel body of the section steel; 12. Cavity; 2. Beam body; 3. Anchor reinforcement; 4. Rubber waterproof belt; 41. Waterproof belt body; 42. Waterproof belt head; 43. Gas storage cavity; 5. Embedded part of the beam body; 6. Cover plate connecting piece; 7. Ballast retaining cover plate; 8. Fixed horizontal reinforcement; 9. Fixed vertical reinforcement. Detailed implementation mode

[0019] The following further elaborates on the present utility model in detail:

[0020] As Figures 1 to 4 shown, the present utility model provides an easily maintainable bridge expansion device, including a special-shaped steel 1 and a beam body 2. Anchor reinforcements 3 are fixedly installed on the outer sides of the special-shaped steels 1, and the anchor reinforcements 3 are fixedly connected to the inside of the beam body 2. The special-shaped steels 1 are arranged between the beam bodies 2. The special-shaped steel 1 includes a steel body 11 of the section steel, and a cavity 12 is formed on the inner side of the steel body 11. A rubber waterproof belt 4 is movably installed on the inner side of the cavity 12. The rubber waterproof belt 4 includes a waterproof belt body 41, and waterproof belt heads 42 are fixedly connected to the left and right sides of the waterproof belt body 41. The waterproof belt heads 42 are movably clamped inside the cavity 12, and a gas storage cavity 43 is arranged inside the waterproof belt heads 42.

[0021] It is fixed on the embedded part 5 of the beam body through the anchor reinforcement 3 connected to the special-shaped steel 1, and cement is poured for fixation. The waterproof belt body 41 is tightly fixed through the cavity 12 between the waterproof belt heads 42 on both sides of it and the steel body 11 of the section steel. By filling inert gas into the gas storage cavity 43 of the waterproof belt head 42 to make it reach a certain pressure, the waterproof belt head 42 is closely attached to and locked with the inner surface of the cavity 12, preventing the waterproof belt head 42 from falling off in the cavity 12. When the beam body 2 expands and contracts, its function is realized through the deformation of the rubber waterproof belt 4. During disassembly, by discharging the inert gas in the gas storage cavity 43, the waterproof belt head 42 can be easily separated from the cavity 12, improving the convenience of installation, disassembly, and replacement, and also ensuring the installation quality.

[0022] As Figure 2 shown, the gas storage cavity 43 is arranged with a one-way opening, and a gas nozzle corresponding to the gas storage cavity 43 is arranged outside the waterproof belt head 42.

[0023] By arranging a gas nozzle corresponding to the gas storage cavity 43 on the waterproof belt head 42, it is convenient to fill inert gas into the gas storage cavity 43 to reach a certain pressure to ensure the tightness of the connection between the waterproof belt head 42 and the cavity 12. At the same time, the inert gas in the gas storage cavity 43 can be discharged through the gas nozzle to separate the waterproof belt head 42 from the cavity 12, facilitating the extraction of the waterproof belt head 42 and the disassembly and replacement of the rubber waterproof belt 4.

[0024] Meanwhile, the waterproof belt body 41 includes, but is not limited to, porous, "herringbone", "W" shape, wavy shape, etc., all of which are applicable, and the selection is more flexible.

[0025] As Figure 2 shown, the profiled steel body 11 is arranged oppositely left and right between the beam bodies 2.

[0026] By arranging the profiled steel body 11 oppositely left and right between the beam bodies 2, and by correspondingly clamping the waterproof belt type head 42 into the cavity 12 inside the profiled steel body 11 on the relatively two sides and inflating it, so as to tightly fix the waterproof belt type head 42 inside the cavity 12, ensuring that there is no water leakage or seepage on the contact surface, and facilitating the convenience of installation and removal and replacement.

[0027] As Figure 3 shown, a release agent is coated on the outside of the waterproof belt type head 42.

[0028] By coating a release agent on the outside of the waterproof belt type head 42, it prevents the adhesion between the surface of the waterproof belt type head 42 and the cavity 12 due to long-term use. By evenly coating a layer of release agent on the surface of the waterproof belt type head 42 during installation, it is convenient to easily separate from the inside of the cavity 12 during subsequent removal, facilitating the removal.

[0029] As Figure 2 shown, a beam embedded part 5 is arranged inside the beam body 2, a fixed horizontal steel bar 8 and a fixed vertical steel bar 9 are arranged outside the beam embedded part 5, and the anchor steel bar 3 is fixedly connected to the beam embedded part 5.

[0030] The anchor steel bar 3, the beam embedded part 5, the fixed horizontal steel bar 8 and the fixed vertical steel bar 9 are fixed by pouring cement.

[0031] By embedding the beam embedded part 5 in cooperation with the fixed horizontal steel bar 8 and the fixed vertical steel bar 9 on the beam body 2, and fixedly connecting the anchor steel bar 3 to the beam embedded part 5 and pouring and fixing with cement, the strength between the beam bodies 2 is ensured, and the installation of the profiled steel 1 is ensured to be stable.

[0032] As Figure 2 shown, a cover plate connecting piece 6 is fixedly installed inside the beam body 2, and a ballast retaining cover plate 7 located above the rubber waterproof belt 4 is fixedly installed on the top of the cover plate connecting piece 6.

[0033] By presetting the cover plate connecting piece 6 on the beam embedded part 5, and effectively preventing the impact and wear of the train or vehicle on the bridge through the cooperation of the cover plate connecting piece 6 installed inside the cover plate connecting piece 6 and the ballast retaining cover plate 7, the safety and stability of the bridge are guaranteed.

[0034] Next, the working principle of the easily maintainable bridge expansion device will be specifically described.

[0035] As Figures 1 to 4As shown in the figure, the anchor reinforcement 3 is fixed on the embedded steel plate of the beam embedded part 5, and the beam embedded part 5 is embedded in the beam body 2 and fixed by pouring cement. The special-shaped steel 1 is installed inside the anchor reinforcement 3 and is arranged oppositely between two beam bodies 2. When the installation of the special-shaped steel 1 is completed and the strength of the cast concrete reaches 80% or more, the waterproof strip head 42 on the outer side of the waterproof strip body 41 is inserted into the cavity 12 of the steel body 11 from one end until it reaches the other end to the installation position by using tools. Then, inert gas is filled into the gas storage cavity 43 arranged inside the waterproof strip head 42 from the gas nozzle on the gas storage cavity 43 and reaches a certain inflation pressure, so that the beam body 2 is tightly connected and fixed with the special-shaped steel 1 to prevent falling off. When disassembling, the inert gas in the gas storage cavity 43 of the waterproof strip head 42 is released through the gas nozzle. Since the surface of the waterproof strip head 42 is separated from the inner surface of the cavity 12 of the steel body 11, and the outer surface of the waterproof strip head 42 is coated with a release agent, the waterproof strip head 42 can be easily withdrawn from the cavity 12 of the steel body 11. After cleaning the cavity 12, a new rubber waterproof strip 4 is installed. After the installation quality is checked and qualified, the replacement and maintenance can be completed.

[0036] The above text has generally described the present utility model in detail. However, based on the present utility model, some modifications or improvements can be made, which are obvious to those of ordinary skill in the technical field. Therefore, the modifications or improvements made without departing from the spirit and idea of the present utility model are within the protection scope of the present utility model.

Claims

1. An easy-to-maintain bridge expansion device, characterized in that: The invention comprises a special-shaped steel (1) and a beam body (2), wherein anchor steel bars (3) are fixedly installed on the outer side of the special-shaped steel (1), wherein the anchor steel bars (3) are fixedly connected to the inside of the beam body (2), wherein the special-shaped steel (1) is arranged between the beam bodies (2), wherein the special-shaped steel (1) comprises a steel body (11), wherein a cavity (12) is provided on the inner side of the steel body (11), wherein a rubber waterproof belt (4) is movably installed on the inner side of the cavity (12), wherein the rubber waterproof belt (4) comprises a waterproof belt body (41), wherein waterproof belt heads (42) are fixedly connected to the left and right sides of the waterproof belt body (41), wherein the waterproof belt heads (42) are movably clamped to the inside of the cavity (12), and wherein an air storage cavity (43) is arranged inside the waterproof belt heads (42).

2. The easy-to-maintain bridge expansion device according to claim 1, characterized in that: The air storage cavity (43) is arranged to be one-way open, and an air nozzle corresponding to the air storage cavity (43) is arranged outside the waterproof tape head (42).

3. The easy-to-maintain bridge expansion device according to claim 1, characterized in that: The steel body (11) is located between the beam bodies (2) and is arranged opposite to each other on the left and right sides.

4. The easy-to-maintain bridge expansion device according to claim 3, characterized in that: The exterior of the waterproof tape head (42) is coated with a release agent.

5. The easy-to-maintain bridge expansion device according to claim 1, characterized in that: The beam body (2) is provided with a beam body embedded part (5) inside, the beam body embedded part (5) is provided with a fixed transverse steel bar (8) and a fixed vertical steel bar (9) outside, and the anchor steel bar (3) is fixedly connected to the beam body embedded part (5).

6. The easy-to-maintain bridge expansion device according to claim 2, characterized in that: The anchoring steel bars (3), beam body embedded parts (5), fixed transverse steel bars (8) and fixed vertical steel bars (9) are fixed by pouring cement.

7. The easy-to-maintain bridge expansion device according to claim 3 is characterized by: A cover plate connector (6) is fixedly installed inside the beam body (2), and a ballast retaining cover plate (7) located above the rubber waterproof belt (4) is fixedly installed on the top of the cover plate connector (6).

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