Bridge seamless expansion joint chute device

Abstract

This invention relates to the field of bridge technology, specifically disclosing a seamless expansion joint grooving device for bridges, comprising a grooving base, a spring assembly, grooving pads, an anchoring slide, and a pre-embedded steel plate. The upper surface of the strip-shaped grooving base has a strip-shaped arc-shaped groove. The spring assembly is a strip-shaped arc-shaped structure formed by connecting several parallel arc-shaped spring segments end-to-end, placed within the arc-shaped groove along its length. Two grooving pads are symmetrically arranged on either side of the spring assembly. The upper end of each grooving pad abuts against the lower surface of a stop block in the upper opening of the arc-shaped groove. The lower end of the anchoring slide has a sphere, which supports the spring assembly. The upper end of the anchoring slide is connected to the pre-embedded steel plate. This seamless expansion joint grooving device not only effectively limits the vertical displacement of the elastic expansion joint in the seamless expansion joint, preventing it from arching above the road surface, but also facilitates subsequent maintenance.

Description

Technical Field

[0001] This invention relates to the field of bridge technology, and in particular to a seamless expansion joint chute device for bridges. Background Technology

[0002] The information disclosed in the background section of this invention is intended only to enhance the understanding of the overall background of this invention and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] As a crucial component of transportation infrastructure, bridges must ensure the smoothness, sturdiness, and safety of the road surface. Expansion joints are typically installed between the ends of two beams, between a beam end and an abutment, or at the transverse hinges of the bridge. They serve to regulate and connect the superstructure caused by concrete shrinkage and creep, temperature variations, and vehicle loads. Expansion joints should be able to expand and contract freely in two directions parallel and perpendicular to the bridge axis, be robust and reliable, ensure smooth vehicle traffic without jolting or noise, prevent rainwater and debris from seeping in and clogging, and be easy to install, inspect, maintain, and clean. Commonly used bridge expansion joints include modular expansion joints, toothed expansion joints, and seamless expansion joints.

[0004] However, traditional expansion joints lack the ability to deform vertically. When the bridge beam is subjected to load, the beam ends warp, and the expansion joint cannot accommodate the appropriate vertical displacement, leading to structural damage, reduced service life, and easy filling of gaps with debris, hindering bridge expansion and contraction. Furthermore, the waterstop is prone to damage and leakage, resulting in poor durability. Therefore, seamless expansion joint technology has emerged, as evidenced by patent documents such as CN113585058A and CN107815963A. Seamless expansion joints generally consist of an elastic expansion body and anchoring devices at both ends. Their working principle involves the bottom of the elastic expansion body detaching from the concrete, allowing the deformation of the elastic expansion body to accommodate changes in bridge gaps, while the anchoring devices on both sides prevent the elastic expansion body from separating from the beam ends. However, this technical solution still has shortcomings. The reason is that the inventor found that in the actual application of the seamless expansion joint technology, during the compression process of the bridge gap, the lower part of the elastic expansion body is a concrete beam, which restricts the downward displacement but allows free upward displacement. This causes the elastic expansion body to arch higher than the road surface, which not only affects driving comfort and safety, but also makes the expansion body prone to wear and failure. Furthermore, this leads to the problem that the expansion body is not easy to repair or replace after it is damaged. Summary of the Invention

[0005] This invention provides a sliding groove device for seamless expansion joints in bridges. This device not only effectively limits the vertical displacement of the elastic expansion joint within the seamless expansion joint, preventing it from arching above the road surface, but also facilitates subsequent maintenance, reduces construction difficulty, and improves construction efficiency. Specifically, the technical solution of this invention is as follows.

[0006] A seamless expansion joint chute device for bridges includes: a chute base, a spring assembly, chute pads, an anchoring slide, and an embedded steel plate. The upper surface of the strip-shaped chute base has a strip-shaped arcuate groove, and the inner side of the upper opening of the arcuate groove has a protruding stop. The spring assembly is a strip-shaped arcuate structure formed by connecting several parallel arcuate spring segments end-to-end, placed on the bottom surface within the arcuate groove along its length. The chute pads are strip-shaped arcuate plates, with two pads symmetrically arranged on both sides of the spring assembly. The outer wall of the pads adheres to the inner wall of the arcuate groove, and the lower end of the pads abuts against the side wall of the spring assembly. The upper end of the pad abuts against the lower surface of the stop, forming a constraint. The lower end of the anchoring slide has a sphere, which is constrained between the two chute pads and supported on the spring assembly. The upper end of the anchoring slide extends through the upper opening of the arc-shaped groove and connects to the horizontally set pre-embedded steel plate, and the pre-embedded steel plate and the slide base form a cross shape perpendicular to each other.

[0007] Furthermore, the arc-shaped groove extends through both end faces of the slide base to facilitate the disassembly of the anchoring slide.

[0008] Furthermore, the arc-shaped groove is a semi-circular groove, and the stop block is integrally connected to the arc-shaped groove.

[0009] Furthermore, the upper part of the outer side wall of the sliding pad has an inwardly facing boss that abuts against the lower surface of the stop block. The upper end of the sliding pad is flush with the upper port of the arc-shaped groove.

[0010] Furthermore, the embedded steel plate is attached to the upper surface of the slide base.

[0011] Furthermore, an elastic expansion joint is fixed to the upper surface of the embedded steel plate. Optionally, the upper end of the anchoring slide passes through the embedded steel plate and is fixedly connected to the bottom surface of the elastic expansion joint.

[0012] Furthermore, the upper end of the anchoring slide passes through the elastic expansion body and is connected to the nut, thereby fastening the elastic expansion body to the embedded steel plate. The upper surface of the elastic expansion body has a groove for accommodating the nut.

[0013] Furthermore, each of the pre-embedded steel plates is connected to at least two of the anchoring slides at intervals, and each anchoring slide corresponds to one of the slide bases, and these slide bases are parallel to each other.

[0014] Furthermore, each of the aforementioned groove bases is provided with several of the aforementioned embedded steel plates, and each of the aforementioned embedded steel plates corresponds to one of the aforementioned anchoring slides. These embedded steel plates enable the movement of the elastic telescopic body to be smoother.

[0015] Furthermore, another type of anchoring slide includes a long cylindrical body and the rods, with several rods vertically fixed to the outer wall of the cylinder in a spaced-apart configuration. The cylinder is horizontally positioned between two sliding pads in the arc-shaped groove, with the outer wall of the cylinder abutting against the inner wall of the sliding pad. The upper part of the arc-shaped groove constrains the cylinder, which is supported by the spring assembly. The upper end of the rod extends through the upper opening of the arc-shaped groove and connects to the embedded steel plate.

[0016] Compared with the prior art, the present invention has at least the following beneficial technical effects: The bridge seamless expansion joint chute device of the present invention, while ensuring that the elastic expansion body in the seamless expansion joint can move with the width of the expansion joint, can also effectively prevent the elastic expansion body from arching and protruding from the road surface due to pressure after the seamless expansion joint narrows, reducing the height difference between the seamless expansion joint and the road surface, avoiding impact on driving comfort and safety, reducing driving noise, and preventing the elastic expansion body from being more prone to wear and failure after protrusion. In addition, the bridge seamless expansion joint chute device of the present invention, through the spring assembly and chute pad in the chute base, facilitates the on-site installation and subsequent maintenance and disassembly of the elastic expansion body, reducing on-site construction difficulty, improving construction efficiency, and eliminating the need to remove the pre-embedded chute base for reconstruction during subsequent maintenance and replacement, thus saving maintenance costs. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 The following is a schematic diagram of the structure of the bridge seamless expansion joint chute device in the embodiments below.

[0019] Figure 2 for Figure 1 Sectional view of AA.

[0020] Figure 3 The following is a schematic diagram of the structure of the slide base in the embodiments below.

[0021] Figure 4 The following is a schematic diagram of the spring assembly in the embodiments.

[0022] Figure 5 This is a front view of the groove pad block in the following embodiments.

[0023] Figure 6 The following is a schematic diagram of the assembly structure of the bridge seamless expansion joint groove device and the elastic expansion body in the embodiment below.

[0024] Figure 7 This is a schematic diagram of another type of anchoring slide in the following embodiments.

[0025] The markings in the above figure represent: 1-bridge, 2-slide base, 3-slide pad, 4-spring assembly, 5-anchor slide, 6-embedded steel plate, 7-elastic expansion body, 8-nut, 201-arc groove, 202-stop block, 301-bore, 501-rod, 502-sphere, 503-cylinder. Detailed Implementation

[0026] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] For ease of description, the terms "up," "down," "left," and "right" appearing in this invention only indicate that they correspond to the up, down, left, and right directions in the accompanying drawings. They do not limit the structure and are merely for the purpose of describing the invention and simplifying the description. They do not indicate or imply that the device or component referred to needs to have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The seamless expansion joint chute device for bridges of the present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0029] refer to Figures 1 to 6 An example of a seamless expansion joint chute device for a bridge includes: a chute base 2, a chute pad 3, a spring assembly 4, an anchoring slide 5, and a pre-embedded steel plate 6. In use, the chute base 2 is pre-embedded and fixed in the concrete of the expansion joint of the bridge 1. The chute base 2 is a long strip structure made of metal (such as stainless steel), and its upper surface has an arc-shaped groove 201 distributed along the length of the chute base 2. (Reference) Figure 3 The arc-shaped groove 201 is a semi-circular groove, and the inner side of the upper opening of the arc-shaped groove 201 has an integrally connected protruding stop 202.

[0030] refer to Figure 4The spring assembly 4 is a long, arc-shaped structure formed by connecting the ends of several parallel arc-shaped springs. Its length is the same as the length of the arc-shaped groove 201. The spring assembly 4 is placed on the bottom surface of the arc-shaped groove 201 along its length, and the lower surface of the spring assembly 4 is in contact with the inner wall of the arc-shaped groove 201.

[0031] refer to Figure 2 and Figure 5 The sliding pad 3 is a long, arc-shaped plate. Two sliding pads 3 are symmetrically arranged on both sides of the spring assembly 4, and the outer wall of the sliding pad 3 is attached to the inner wall of the arc-shaped groove 201. The lower end face of the sliding pad 3 abuts against the side wall of the spring assembly 4, and the upper end of the sliding pad 3 abuts against the lower surface of the stop block 202, thereby confining the sliding pad 3 within the arc-shaped groove 201 and preventing the sliding pad 3 from being pulled out from the upper opening of the arc-shaped groove 201. This, in turn, restricts the vertical movement of the elastic expansion joint 7, which is fixedly connected to the embedded steel plate 6, and avoids the problem of the elastic expansion joint 7 arching and protruding above the road surface due to pressure after the seamless expansion joint narrows.

[0032] refer to Figure 1 and Figure 2 The anchoring slide 5 includes a rod 501 and a sphere 502, wherein the sphere 502 is fixed to the lower end of the rod 501 and their axes coincide. In use, the sphere 502 is located between the two sliding pads 3 and is supported on the spring assembly 4. The upper ends of the two sliding pads 3 are smaller than the diameter of the sphere 502, thereby constraining the sphere 502 in the space formed by the sliding pads 3 and the spring assembly 4. The sphere 502 can slide freely along the length of the arc groove 201 and can rotate in any direction, but it cannot make large vertical movements. The upper end of the anchoring slide 5 passes through the upper opening of the arc groove 201 and connects to the horizontally set pre-embedded steel plate 6, and the pre-embedded steel plate 6 and the sliding base 2 form a cross shape perpendicular to each other.

[0033] When using, refer to Figure 2 and Figure 6 The upper end of the anchoring slide 5 passes through the embedded steel plate 6 and is fixedly connected to the bottom surface of the elastic expansion body 7. Alternatively, the upper end of the anchoring slide 5 can pass through the elastic expansion body 7 and then be connected to the nut 8. Specifically, the upper surface of the elastic expansion body 7 has a groove for accommodating the nut 8. The upper end of the rod 501 (with external threads) passes through the embedded steel plate 6 and the elastic expansion body 7, enters the groove, and is threadedly fastened to the nut 8, thereby securing the elastic expansion body 7 to the embedded steel plate 6. At this time, the lower surface of the embedded steel plate 6 adheres to the upper surface of the slide base 2. (Reference) Figure 1 Several parallel sliding bases 2 are spaced apart in the expansion joint of bridge 1, distributed along the length of bridge 1 (in the direction of vehicle travel). Several embedded steel plates 6 are spaced apart and span the spaced sliding bases 2, with an anchoring slide 5 connected to each end of the embedded steel plate 6. These embedded steel plates 6 are all fixedly connected to the bottom surface of the elastic expansion joint 7, and are evenly distributed on the bottom surface of the elastic expansion joint 7 so that the elastic expansion joint 7 can move along the arc-shaped groove 201 to adapt to changes in the width of the expansion joint. It should be understood that anchoring slides 5 and their corresponding sliding bases 2 can also be set between the two ends of the embedded steel plates 6 to better fix the elastic expansion joint 7 and help prevent the elastic expansion joint 7 from easily detaching from the anchoring slide 5 after being squeezed and deformed.

[0034] The aforementioned novel seamless bridge expansion joint chute device not only ensures that the elastic expansion body 7 within the expansion joint can move with changes in the width of the expansion joint, but also effectively prevents the elastic expansion body 7 from arching and protruding from the road surface due to pressure after the expansion joint narrows. This is because: firstly, the structure formed by the spring assembly 4 and the chute pad 3 constrains the sphere 502 at the lower end of the anchoring slide block 5 within the arc-shaped groove 201, allowing the sphere 502 to slide freely along the length of the arc-shaped groove 201 and rotate in any direction. This allows the elastic expansion body 7 to adapt to the movement caused by compression deformation or repositioning due to changes in the width of the expansion joint, ensuring that the expansion joint is always filled with the elastic expansion body 7, resulting in smooth and comfortable vehicle passage. However, since the anchoring slide 5 cannot perform large-scale vertical movement, the elastic expansion joint 7 also cannot perform large-scale vertical movement. This effectively avoids the phenomenon of the elastic expansion joint 7 arching and protruding from the road surface due to pressure after the expansion joint narrows, reduces the height difference between the seamless expansion joint and the road surface, avoids affecting driving comfort and safety, reduces driving noise, and also avoids the problem of the elastic expansion joint 7 being more prone to wear and failure after protruding.

[0035] Furthermore, the structure formed by the spring assembly 4 and the sliding pad 3 makes the anchoring slide 5 easier to disassemble and install, reducing on-site construction difficulty and improving construction efficiency. This is because, during disassembly, the spring assembly 4 or one of the sliding pads 3 can be pulled out from one end of the arc-shaped groove 201 (which penetrates both ends of the sliding base 2), causing the sphere 502 of the anchoring slide 5 to loosen significantly. This allows the anchoring slide 5, along with the embedded steel plate 6 and the elastic expansion body 7, to be easily removed from the upper opening of the arc-shaped groove 201, and a new elastic expansion body 7 can be replaced without needing to remove the embedded sliding base 2 and start construction again. When replacing and reinstalling the elastic telescopic body 7, first assemble the spring assembly 4 and the sliding pad 3 into the arc-shaped groove 201. Since the spring assembly 4 in the arc-shaped groove 201 is compressible, the ball 502 of the anchoring slide 5 is placed directly at the upper opening between the two sliding pads 3 and pressed firmly. This causes the sliding pads 3 to move downwards, thereby widening the upper opening between the sliding pads 3, allowing the ball 502 to enter between the two sliding pads 3. At this time, the sliding pads 3 automatically reset under the action of the spring assembly 4, and the upper opening between the sliding pads 3 narrows, restricting the ball 502. The ball 502 can no longer escape from the arc-shaped groove 201 under upward force. Therefore, the structure formed by the spring assembly 4 and the sliding pad 3 achieves efficient and convenient installation of the anchoring slide 5 while effectively restricting the vertical movement of the elastic telescopic body 7. In addition, the spring assembly 4 also serves to store lubricating oil, thereby making the movement of the ball 502 in the arc groove 201 smoother, reducing wear, and improving service life.

[0036] In another implementation, refer to Figure 2 and Figure 5 In the bridge seamless expansion joint groove device exemplified in the above embodiment, the upper part of the outer side wall of the groove pad 3 has an inwardly facing boss 301, which abuts against the lower surface of the stop block 202. The upper end of the groove pad 3 is flush with the upper port of the arc-shaped groove 201. This structure of the groove pad 3 helps to form a smaller upper opening between two groove pads 3, thereby providing better constraint on the sphere 502 of the anchoring slide block 5.

[0037] In another implementation, refer to Figure 7Example of another structure for the anchoring slide 5, comprising a long cylindrical body 503 and the aforementioned rod 501, excluding the sphere 502. Several rods 501 are vertically fixed to the outer wall of the cylindrical body 503 in a spaced-apart configuration. This structure allows each rod 501 in the same slide base 2 to share a single cylindrical body 503 without requiring separate connections to each sphere 502. It should be understood that, in this case, the cylindrical body 503 is horizontally positioned between two slide pads 3 in the arc-shaped groove 201, with the outer wall of the cylindrical body 503 abutting against the inner wall of the slide pad 3, and the upper portion of the arc-shaped groove 201 constraining the cylindrical body 503, which is supported on the spring assembly 4. The upper end of the rod 501 extends through the upper opening of the arc-shaped groove 201 and connects to the embedded steel plate 6.

[0038] Finally, it should be noted that any modifications, equivalent substitutions, or improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention. Although specific embodiments of this invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of this invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of this invention are still within the scope of protection of this invention.

Claims

1. A seamless expansion joint chute device for bridges, characterized in that, include: The slide base has a strip-shaped arc groove on its upper surface, and the inner side of the upper opening of the arc groove has a protruding stop. A spring assembly, wherein the spring assembly is a strip-shaped arc structure formed by connecting the ends of several parallel arc springs one after the other, and is placed on the bottom surface of the arc groove along the length direction of the arc groove; The sliding pad is a strip-shaped arc plate. Two sliding pads are symmetrically arranged on both sides of the spring assembly. The outer side wall of the sliding pad is attached to the inner side wall of the arc groove, and the lower end face of the sliding pad abuts against the side wall of the spring assembly. The upper end of the sliding pad abuts against the lower surface of the stop to form a restriction. An anchoring slide, the lower end of which has a ball constrained between the two slide blocks and supported on the spring assembly; And a pre-embedded steel plate, which forms a cross shape perpendicular to the sliding base. The upper end of the anchoring slide passes through the upper opening of the arc groove and is connected to the horizontally set pre-embedded steel plate.

2. The bridge seamless expansion joint chute device according to claim 1, characterized in that, The arc-shaped groove extends through both end faces of the slide base.

3. The bridge seamless expansion joint chute device according to claim 1, characterized in that, The upper part of the outer side wall of the sliding pad has an inward protrusion that abuts against the lower surface of the stop block; the upper end of the sliding pad is flush with the upper port of the arc groove.

4. The bridge seamless expansion joint chute device according to claim 1, characterized in that, The embedded steel plate is attached to the upper surface of the slide base.

5. The bridge seamless expansion joint chute device according to claim 4, characterized in that, An elastic expansion joint is fixed on the upper surface of the embedded steel plate; or, the upper end of the anchoring slide passes through the embedded steel plate and is fixedly connected to the bottom surface of the elastic expansion joint.

6. The bridge seamless expansion joint chute device according to claim 5, characterized in that, The upper end of the anchoring slide passes through the elastic expansion body and is connected to the nut, thereby fastening the elastic expansion body to the embedded steel plate. The upper surface of the elastic expansion body has a groove for accommodating the nut.

7. The bridge seamless expansion joint chute device according to claim 5, characterized in that, Each of the pre-embedded steel plates is connected to at least two of the anchoring slides at intervals, and each anchoring slide corresponds to one of the slide bases, and these slide bases are parallel to each other.

8. The bridge seamless expansion joint chute device according to claim 7, characterized in that, Each of the aforementioned chute bases is provided with a number of the aforementioned embedded steel plates, and each of the aforementioned embedded steel plates corresponds to one of the aforementioned anchoring slides.

9. The bridge seamless expansion joint chute device according to claim 8, characterized in that, The anchoring slide includes a long cylindrical body and rods, with several rods vertically fixed to the outer wall of the cylindrical body at intervals. The cylindrical body is horizontally positioned between two sliding pads in the arc-shaped groove, with the outer wall of the cylindrical body abutting against the inner wall of the sliding pad. The upper part of the arc-shaped groove constrains the cylindrical body, which is supported on the spring assembly. The upper end of the rod extends through the upper opening of the arc-shaped groove and connects to the embedded steel plate.

10. The bridge seamless expansion joint chute device according to any one of claims 1-9, characterized in that, The arc-shaped groove is a semi-circular groove, and the stop block is integrally connected to the arc-shaped groove.

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