A prefabricated bridge expansion joint of bare concrete

Abstract

The application discloses a bare concrete prefabricated bridge expansion joint device, which comprises a left structure and a right structure, wherein the left structure and the right structure are the same in structure and are mirror image arranged, box top plates and box bottom plates are oppositely arranged on the left structure, a box rear plate connected with the box bottom plate is arranged on one side of the box top plate away from the right structure, a side beam steel connected with the box top plate is arranged on the upper portion of the other side, a box front plate connected with the box bottom plate is arranged on the lower portion, and a reinforcing rib and a special-shaped rib are arranged in the left structure. The reinforcing rib and the special-shaped rib can ensure the strength of the bridge expansion joint, the structure is simple, firm and durable, the thermal expansion and cold contraction deformation of the highway bridge caused by the change of the environmental temperature can be solved, and the application is widely used in various highway bridges.

Description

Technical Field

[0001] This invention relates to bridge expansion joints, specifically to a bare concrete precast bridge expansion device. Background Technology

[0002] Bridges are common basic municipal engineering projects in market life. Bridges are mainly used to connect the two sides of rivers or canyons to facilitate passage. Since bridges will expand and contract during use, expansion joint devices need to be installed during the construction of bridges to avoid damage caused by expansion and contraction. In addition, for example, the patent with publication number CN208072194U, entitled "Utility Model of Bridge Expansion Joint", has a complex structure, uses a lot of steel, and is costly, which cannot meet the needs of use. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: a bare concrete precast bridge expansion joint, comprising a left structure and a right structure, wherein the left structure and the right structure are identical and mirror-image arranged; the left structure has a box-shaped top plate and a box-shaped bottom plate arranged vertically opposite each other; the box-shaped top plate has a box-shaped rear plate connected to the box-shaped bottom plate on the side away from the right structure, and a side beam steel connected to the box-shaped top plate on the upper part of the other side, and a box-shaped front plate connected to the box-shaped bottom plate on the lower part; the left structure has reinforcing ribs and irregular ribs arranged inside; the reinforcing ribs are connected to the inner walls of the box-shaped top plate and the box-shaped rear plate, and the irregular ribs are connected to the inner side of the side beam steel; several straight ribs are arranged along the length direction of the bridge expansion joint on the irregular ribs; steel pipes penetrating the box-shaped top plate, reinforcing ribs, irregular ribs, and box-shaped bottom plate are respectively arranged on the left structure and the right structure; the box-shaped bottom plate, The rear panel of the box is detachably connected to the top panel and the front panel of the box, and the cavity formed by the top panel, bottom panel, front panel and rear panel of the box is filled with concrete cement.

[0004] The advantages of this invention compared to existing technologies are as follows: This invention, by setting reinforcing ribs and irregularly shaped ribs, can ensure the strength of bridge expansion joints. It has a simple, robust, and durable structure, and can solve the problem of thermal expansion and contraction deformation of highway bridges caused by changes in ambient temperature. It is widely used in various highway bridges. This invention can significantly shorten the construction period, reducing the original minimum curing period of 7 days to the current "morning construction, evening opening" capability, greatly shortening the traffic cycle. The exposed concrete method saves on steel material costs and reduces weight while maintaining the overall product performance advantages. During exposed concrete construction, the product, quick-repair material, and existing concrete adhere more tightly, resulting in stronger compatibility and integrity. Attached Figure Description

[0005] Figure 1 This is a cross-sectional schematic diagram of a precast bare concrete bridge expansion joint according to the present invention.

[0006] Figure 2 This is a cross-sectional schematic diagram of the bare concrete precast bridge expansion joint in use according to the present invention.

[0007] Figure 3 This is a transverse schematic diagram of a precast concrete bridge expansion joint according to the present invention. Detailed Implementation

[0008] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0009] In the description of the embodiments of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These are merely for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0010] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0011] In the description of the embodiments of the present invention, "multiple" means at least two.

[0012] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0013] Example:

[0014] Combined with appendix Figure 1-3 A precast exposed concrete bridge expansion joint includes a left structure A and a right structure B. The left and right structures A and B are identical and mirror images of each other. The left structure A has a box-shaped top plate 1 and a box-shaped bottom plate 2 arranged vertically opposite each other. On the side of the box-shaped top plate 1 away from the right structure B, a box-shaped rear plate 3 connected to the box-shaped bottom plate 2 is provided. On the other side, a side beam steel 4 connected to the box-shaped top plate 1 is provided at the upper part, and a box-shaped front plate 5 connected to the box-shaped bottom plate 2 is provided at the lower part. The box-shaped bottom plate 2 and the box-shaped rear plate 3 are detachably connected to the box-shaped top plate 1 and the box-shaped front plate 5. During fabrication, concrete is poured into the cavity formed by the box-shaped top plate 1, box-shaped bottom plate 2, box-shaped front plate 5, and box-shaped rear plate 3. After the concrete dries, the box-shaped bottom plate 2 and the box-shaped rear plate 3 are removed, exposing the poured concrete, hence the exposed concrete type. Figure 2 As shown.

[0015] The left structure A is equipped with reinforcing ribs 6 and irregular ribs 7. The reinforcing ribs 6 are L-shaped and the corners of the reinforcing ribs 6 are arc-shaped. The reinforcing ribs 6 are connected to the inner walls of the box top plate 1 and the box rear plate 3. The irregular ribs 7 are connected to the inner side of the side beam steel 4. Several straight ribs 8 are set on the irregular ribs 7 along the length direction of the bridge expansion joint. Steel pipes 9 are respectively set on the left structure A and the right structure B, penetrating the box top plate 1, the reinforcing ribs 6, the irregular ribs 7 and the box bottom plate 2.

[0016] The side beam steel 4 includes a vertical steel 401 connecting to the top plate 1 of the box girder. A horizontal steel 402 connecting the front plate 5 of the box girder and the irregular-shaped reinforcement 7 is provided at the bottom of the vertical steel 401. The horizontal steel 402 extends to the inner side of the left structure A. A notch 403 is provided inwardly on the top of the vertical steel 401 near the right structure B. The irregular-shaped reinforcement 403 is a ring-shaped reinforcement with an opening that connects to the horizontal steel 402 at the bottom of the side beam steel 4.

[0017] There are four straight bars 8, two of which are located at the top of the irregular bar 7, and the other two are located on the inner top surface of the irregular bar 7.

[0018] This invention solves the problem of thermal expansion and contraction deformation of highway bridges caused by changes in ambient temperature, and can be widely applied to various highway bridges; it transforms bridge expansion joints from consumables widely recognized in the industry into truly durable goods, extending their lifespan to thirty years.

[0019] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A precast concrete bridge expansion joint, characterized in that, The structure includes a left structure and a right structure, which are identical and mirror images of each other. The left structure has a box-shaped top plate and a box-shaped bottom plate arranged vertically opposite each other. On the side of the box-shaped top plate away from the right structure, there is a box-shaped rear plate connected to the box-shaped bottom plate. On the other side, there is a side beam steel connected to the box-shaped top plate at the top and a box-shaped front plate connected to the box-shaped bottom plate at the bottom. The left structure contains reinforcing ribs and irregular ribs. The reinforcing ribs are connected to the inner walls of the box-shaped top plate and the box-shaped rear plate. The irregular ribs are connected to the inner side of the side beam steel. Several straight ribs are arranged along the length direction of the bridge expansion joint on the irregular ribs. Steel pipes are respectively installed on the left and right structures, penetrating the box-shaped top plate, reinforcing ribs, irregular ribs, and box-shaped bottom plate. The bottom plate, rear plate, top plate, and front plate of the box are detachably connected, and the cavity formed by the top plate, bottom plate, front plate, and rear plate is filled with concrete cement. The side beam steel includes vertical steel connecting the top plate of the box body, and horizontal steel connecting the front plate of the box body and the irregular reinforcement is provided at the bottom of the vertical steel. The horizontal steel extends to the inner side of the left structure. The irregular-shaped reinforcement is a ring-shaped reinforcement with an opening that connects to the transverse steel at the bottom of the side beam.

2. The precast concrete bridge expansion joint according to claim 1, characterized in that, The reinforcing rib is L-shaped, and the corner of the reinforcing rib is an arc-shaped corner.

3. The precast concrete bridge expansion joint according to claim 1, characterized in that, The top of the vertical steel is provided with an inward-facing notch on the side closest to the right structure.

4. The precast concrete bridge expansion joint according to claim 1, characterized in that, The number of straight ribs is four, with two straight ribs located at the top of the irregular rib and the other two straight ribs located on the inner top surface of the irregular rib.

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