Temporary bridge expansion joint

Abstract

The application provides a temporary bridge expansion device and relates to the field of temporary bridge expansion devices. The temporary bridge expansion device comprises a polymer material, both ends of the polymer material are provided with angle steels, the lower ends of the angle steels are provided with a plurality of anchor bars, a pre-buried reinforcing bar is arranged between every two adjacent anchor bars, two cross reinforcing bars I are arranged between the plurality of anchor bars and the plurality of pre-buried reinforcing bars, both ends of the lower part of the plurality of pre-buried reinforcing bars are provided with cross reinforcing bars II, the polymer material has elastic recovery and waterproof sealing properties, and an integrated connection structure without gaps is formed between the polymer material and the angle steels through a field curing process. The application provides the temporary bridge expansion device, the device uses standard general angle steels to replace customized special-shaped steels, which not only meets the shallow slot requirement of temporary scenes, but also reduces the manufacturing cost, and the overall stability of the device is ensured through the cross cooperation of the plurality of reinforcing bars.

Description

Technical Field

[0001] This invention relates to the field of temporary bridge expansion joints, specifically a temporary bridge expansion joint device. Background Technology

[0002] In bridge reconstruction and expansion projects, temporary expansion joints are required to ensure traffic flow and structural expansion and contraction during construction. Conventional modular expansion joints for bridges typically consist of shaped steel, waterproof strips, and an anchoring system. The special cavity design of the shaped steel allows the waterproof strip to be squeezed and deformed to achieve a sealing effect. However, the complex cavity structure of the shaped steel requires specially made molds, and the shape of the matching waterproof strip is also specially designed, resulting in a manufacturing cost far higher than that of ordinary steel-type devices, and subsequent maintenance is cumbersome. In recent years, in bridge reconstruction and expansion projects, in order to ensure that the new bridge is completed simultaneously with the reconstruction of the old bridge, temporary expansion joints that can adapt to shallow grooves, low cost, and simple maintenance are required. Conventional expansion joints, due to the aforementioned special structural design, are difficult to meet the needs of reconstruction and expansion projects for temporary expansion joints. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a temporary bridge expansion joint that solves the problem of relying on special molds for manufacturing conventional bridge expansion joints using irregularly shaped steel and specially customized waterproof strips.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: A temporary bridge expansion joint includes a polymer material, with angle steel provided at both ends of the polymer material, and multiple anchor bars provided at the lower ends of the angle steel. Pre-embedded steel bars are provided between two adjacent anchor bars, and two transverse steel bars are provided between the multiple anchor bars and the multiple pre-embedded steel bars. Transverse steel bars are provided at both ends of the lower part of the multiple pre-embedded steel bars. The above technical solution uses standard general-purpose angle steel instead of customized special-shaped steel, which not only meets the shallow slot requirements of temporary scenarios, but also reduces manufacturing costs. At the same time, the overall stability of the device is ensured by the cross-coordination of multiple steel bars.

[0007] Preferably, the polymer material has both elastic resilience and waterproof sealing properties, and forms a seamless integrated connection structure with the angle steel through an on-site curing process; The above technical solution eliminates the need for special waterproof strips, achieving both expansion and contraction adaptation and waterproof sealing functions through a single polymer material. The on-site curing process simplifies the installation process, and the seamless connection effectively blocks moisture penetration, reducing the difficulty of later maintenance.

[0008] Preferably, the bonding surface between the angle steel and the polymer material is roughened to improve the bonding stability between the polymer material and the angle steel. The above technical solution increases the contact friction between angle steel and polymer materials, preventing them from peeling off under bridge expansion and contraction or vehicle loads, thus further ensuring connection reliability and device lifespan.

[0009] Preferably, the anchor bars, the transverse reinforcing bars, and the pre-embedded reinforcing bars form a cross-anchoring structure, and the anchor bars are evenly arranged along the length of the angle steel. The above technical solution ensures that the anchoring force is evenly distributed along the length of the device, and the cross structure enhances the pull-out and shear resistance, avoids structural deformation caused by localized stress concentration, and is suitable for the load requirements of temporary passage.

[0010] Preferably, the two transverse reinforcing bars are located at different heights in the intersection area of ​​the anchor bar and the pre-embedded reinforcing bar, forming a double-layer limiting structure; The above technical solution limits the relative displacement between the steel bars from both the top and bottom dimensions, further strengthening the integrity of the anchoring system, preventing the steel bars from loosening due to vehicle loads or expansion and contraction deformation, and improving the structural stability of the device.

[0011] Preferably, the number of pre-embedded steel bars is adapted to the spacing of the anchor bars, so that at least one pre-embedded steel bar is provided between each adjacent anchor bar; The above technical solution fills the stress gap between adjacent anchor bars, achieving uniform transmission of anchoring force, avoiding structural damage caused by local stress concentration, and simplifying the reinforcement layout logic for easier on-site construction.

[0012] Preferably, the edge of the polymer material is tightly fitted to the inner wall of the angle steel, and there are no obvious steps at the connection between the polymer material and the angle steel; The above technical solutions ensure that the upper surface of the device is flat and smooth, avoiding bumps or jams during driving, improving traffic safety, and preventing debris from accumulating at the connection points, thus reducing maintenance frequency and costs.

[0013] (III) Beneficial Effects

[0014] This invention provides a temporary bridge expansion joint. It has the following advantages: This invention provides a temporary bridge expansion joint that uses standard general-purpose steel instead of customized special-shaped steel, combined with a special polymer material that has both good elasticity and waterproof performance. Through bonding or on-site curing, it achieves a seamless, integrated connection with the steel profile. Combined with a cross-anchoring structure consisting of angle steel, anchor bars, embedded reinforcing bars, and double-layer transverse reinforcing bars, this design simplifies the overall structure and waterproofing, reduces manufacturing and operating costs, and ensures the stability and uniform stress distribution of the device. Furthermore, the roughened bonding of the polymer material and angle steel results in a seamless connection without obvious steps, facilitating maintenance. This design precisely meets the core requirements of temporary applications for low cost, easy maintenance, high stability, and reliable expansion and waterproofing performance. Attached Figure Description

[0015] Figure 1 This is an isometric view of the present invention; Figure 2 This is a front view of the installation diagram of the present invention; Figure 3 This is a schematic diagram of the main structure of the present invention; Figure 4 This is a front view of the present invention; Figure 5 This is an exploded view showing a partial structural schematic of the present invention; Figure 6 This is a schematic diagram of a partial component structure of the present invention; Figure 7 This is a schematic diagram of the installation structure of the pre-embedded steel bars and anchor bars of the present invention.

[0016] The markings in the diagram are: 1. Polymer material; 2. Angle steel; 3. Embedded steel bar; 4. Crossbar 1; 5. Crossbar 2; 6. Anchor bar. Detailed Implementation

[0017] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1:

[0019] like Figure 1-4 As shown, the embodiments of the present invention provide A temporary bridge expansion joint includes a polymer material 1, with angle steel 2 at both ends of the polymer material 1. Multiple anchor bars 6 are provided at the lower end of each angle steel 2. Pre-embedded steel bars 3 are provided between each pair of adjacent anchor bars 6. Two transverse steel bars 4 are provided between each pair of anchor bars 6 and pre-embedded steel bars 3. Transverse steel bars 5 are provided at both ends of the lower part of each pair of pre-embedded steel bars 3. Standard general-purpose angle steel 2 is used instead of customized special-shaped steel, which not only meets the shallow slot requirements of temporary scenarios, but also reduces manufacturing costs. At the same time, the overall stability of the device is ensured by the cross-cooperation of multiple steel bars.

[0020] The polymer material 1 combines elastic resilience and waterproof sealing. Through on-site curing process, it forms a seamless integrated connection structure with the angle steel 2, eliminating the need for special waterproof strips. The polymer material 1 achieves both expansion and contraction adaptation and waterproof sealing functions in one piece. The on-site curing process simplifies the installation process, and the seamless connection can effectively block water penetration and reduce the difficulty of later maintenance.

[0021] The bonding surfaces of angle steel 2 and polymer material 1 are roughened to improve the bonding stability between polymer material 1 and angle steel 2, increase the contact friction between angle steel 2 and polymer material 1, prevent the two from peeling off under bridge expansion and contraction deformation or vehicle load, and further ensure connection reliability and device service life.

[0022] Anchor bar 6, through bar 4, and embedded bar 3 form a cross anchorage structure. Anchor bar 6 is evenly arranged along the length of angle steel 2, so that the anchorage force is evenly distributed along the length of the device. The cross structure enhances the pull-out and shear resistance, avoids structural deformation caused by local stress concentration, and is suitable for the load requirements of temporary passage.

[0023] Example 2:

[0024] like Figure 4-7 As shown; The two transverse reinforcing bars 4 are located at different heights in the intersection area of ​​the anchor bar 6 and the pre-embedded reinforcing bar 3, forming a double-layer limiting structure. This limits the relative displacement between the reinforcing bars from both the upper and lower dimensions, further strengthening the integrity of the anchoring system, preventing the reinforcing bars from loosening due to vehicle loads or expansion and contraction deformation, and improving the structural stability of the device.

[0025] The number of pre-embedded steel bars 3 is matched with the spacing of anchor bars 6, so that at least one pre-embedded steel bar 3 is set between each adjacent anchor bar 6, filling the stress gap between adjacent anchor bars 6, realizing the uniform transmission of anchoring force, avoiding structural damage caused by local stress concentration, and simplifying the steel bar layout logic, which is convenient for on-site construction.

[0026] The edge of polymer material 1 is tightly fitted to the inner wall of angle steel 2, and there are no obvious steps at the connection between polymer material 1 and angle steel 2, ensuring that the upper surface of the device is flat and smooth, avoiding bumps or jams during driving, improving traffic safety, and preventing debris from accumulating at the connection, reducing maintenance frequency and cost.

[0027] Working principle: Using standard general-purpose angle steel 2 as the connecting carrier, the lower end is connected by anchor bars 6 evenly arranged along the length direction, in conjunction with the pre-embedded steel bars 3 between adjacent anchor bars 6, the double-layer horizontal cross steel bars 4 arranged at different heights, and the bottom horizontal cross steel bars 5, forming a three-dimensional cross anchoring system, which firmly anchors the device in the reserved structure of the bridge. Through the synergistic force between the steel bars, the vehicle load and structural stress are evenly transferred, avoiding localized concentrated deformation. The core component, polymer material 1, combines elastic resilience with waterproof sealing. Through on-site curing, it forms a seamless integrated connection with the roughened bonding surface of angle steel 2. When the bridge expands or contracts due to temperature changes and loads, polymer material 1 can adapt to the displacement through its own elastic deformation while preventing moisture penetration. Furthermore, there are no obvious steps at the connection between polymer material 1 and angle steel 2, and the flat upper surface design ensures smooth and bump-free passage. The overall structure achieves the stability, elasticity, and waterproofing required for temporary use, while also meeting the core requirements of low cost and easy maintenance.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A temporary bridge expansion joint, comprising a polymer material (1), characterized in that: Angle steel (2) is provided at both ends of the polymer material (1), and multiple anchor bars (6) are provided at the lower end of each angle steel (2). Pre-embedded steel bars (3) are provided between two adjacent anchor bars (6). Two transverse steel bars (4) are provided between the multiple anchor bars (6) and the multiple pre-embedded steel bars (3). Transverse steel bars (5) are provided at both ends of the lower part of the multiple pre-embedded steel bars (3).

2. A temporary bridge expansion joint according to claim 1, characterized in that: The polymer material (1) has both elastic resilience and waterproof sealing properties, and forms a seamless integrated connection structure with the angle steel (2) through on-site curing process.

3. A temporary bridge expansion joint according to claim 1, characterized in that: The bonding surfaces of the angle steel (2) and the polymer material (1) are roughened to improve the bonding stability between the polymer material (1) and the angle steel (2).

4. A temporary bridge expansion joint according to claim 1, characterized in that: The anchor bar (6) forms a cross anchorage structure with the transverse reinforcing bar (4) and the pre-embedded reinforcing bar (3), and the anchor bar (6) is evenly arranged along the length direction of the angle steel (2).

5. A temporary bridge expansion joint according to claim 1, characterized in that: The two transverse reinforcing bars (4) are located at different heights in the intersection area of ​​the anchor bar (6) and the pre-embedded reinforcing bar (3), forming a double-layer limiting structure.

6. A temporary bridge expansion joint according to claim 1, characterized in that: The number of the pre-embedded steel bars (3) is matched with the spacing of the anchor bars (6), so that at least one pre-embedded steel bar (3) is set between each adjacent anchor bar (6).

7. A temporary bridge expansion joint according to claim 1, characterized in that: The edge of the polymer material (1) is closely fitted to the inner wall of the angle steel (2), and there is no obvious step at the connection between the polymer material (1) and the angle steel (2).

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