A spherical tensile bearing for rail transit bridges

Abstract

This utility model provides a spherical tensile bearing for rail transit bridges, comprising an upper bearing plate, a spherical crown support assembly, and a lower bearing plate arranged sequentially from top to bottom. The lower bearing plate is connected to the bridge pier. The upper bearing plate has a recessed support space, and the top of the lower bearing plate extends into the support space. The top of the lower bearing plate has a recessed arc-shaped groove. The spherical crown support assembly is installed in the arc-shaped groove to support the upper and lower bearing plates. The lower bearing plate has a first limiting part, and the upper bearing plate has a second limiting part. The first and second limiting parts are vertically mutually abutting to limit vertical displacement. Thus, the spherical crown support assembly improves the overall bearing capacity and deformation adaptability of the bearing. The abutting engagement of the first and second limiting parts mutually restricts vertical displacement, providing tensile strength and preventing bearing detachment or even bridge overturning, thereby ensuring bridge safety.

Description

Technical Field

[0001] This utility model relates to the field of bridge technology, and in particular to a spherical tensile support for rail transit bridges. Background Technology

[0002] Low-capacity rail transit, commonly known as "cloud buses," is essentially an "electric bus" on rails. It boasts advantages such as relatively low construction costs, short construction periods, high comfort and safety, and green energy efficiency, low carbon emissions, and low noise, leading to its rapid development in recent years. However, its rail bridges are primarily made of steel, making them lightweight and prone to negative reaction forces at the supports, which can cause beam ends to detach or even bridge collapse, resulting in serious consequences such as economic losses or casualties.

[0003] Currently, existing technologies typically employ measures such as beam end ballast and increasing bridge side spans to prevent negative support reactions. However, this technology results in a large amount of construction work, extended construction period, and increased costs.

[0004] Therefore, it is necessary to propose a spherical tensile bearing for rail transit bridges to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0005] The main objective of this invention is to provide a spherical tensile bearing for rail transit bridges, in order to solve the problems of large construction volume and long construction period in the existing technology for preventing negative reaction force of bearings.

[0006] To achieve the above objectives, this utility model provides a spherical tensile bearing for rail transit bridges, comprising an upper bearing plate, a spherical crown support assembly, and a lower bearing plate arranged sequentially from top to bottom; wherein,

[0007] The lower support plate is connected to the pier via a connector. The upper support plate has a recessed support space. The top of the lower support plate extends into the support space. The top of the lower support plate has a recessed arc groove. The spherical crown support assembly is installed in the arc groove to support between the upper support plate and the lower support plate. The spherical surface of the spherical crown support assembly faces the arc groove.

[0008] The lower support plate has a first limiting part, and the upper support plate has a second limiting part. The first limiting part and the second limiting part are arranged to abut against each other in the vertical direction to limit vertical displacement.

[0009] Preferably, the first limiting part is a first flange protruding outward from the top sidewall of the lower support plate, and the second limiting part is a second flange protruding from the bottom inner sidewall of the upper support plate, with the first flange abutting against the upper part of the second flange.

[0010] Preferably, the spherical crown support assembly includes a spherical crown liner, which is supported between the upper support plate and the lower support plate, and the spherical surface of the spherical crown liner is oriented towards the arcuate groove.

[0011] Preferably, the spherical crown support assembly further includes a lower wear-resistant plate, which is connected between the spherical crown liner and the lower support plate.

[0012] Preferably, the lower wear-resistant plate is an arc-shaped plate, and the concave surface of the lower wear-resistant plate is matched with the spherical surface of the spherical crown liner, and the convex surface of the lower wear-resistant plate is matched with the arc-shaped groove.

[0013] Preferably, the spherical crown support assembly further includes an upper wear-resistant plate, which is connected between the spherical crown liner and the upper support plate.

[0014] Preferably, the upper wear-resistant plate is a flat plate.

[0015] Preferably, the connecting component includes a pier top bolt and a steel rod. The lower support plate is connected to the pier by the pier top bolt, the steel rod is embedded in the pier, and the top end of the steel rod is connected to the lower support plate.

[0016] Preferably, the space between the connector and the concrete of the pier is filled with grout.

[0017] Preferably, both the upper wear-resistant plate and the lower wear-resistant plate are made of modified ultra-high molecular weight polyethylene.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This utility model provides a spherical tensile bearing for rail transit bridges, comprising an upper bearing plate, a spherical crown support assembly, and a lower bearing plate arranged sequentially from top to bottom. The lower bearing plate is connected to the bridge pier via a connector. The upper bearing plate has a recessed support space, and the top of the lower bearing plate extends into the support space. The top of the lower bearing plate has a recessed arc-shaped groove. The spherical crown support assembly is installed in the arc-shaped groove to support the upper and lower bearing plates, with the spherical surface of the spherical crown support assembly facing the arc-shaped groove. The lower bearing plate has a first limiting part, and the upper bearing plate has a second limiting part. The first and second limiting parts are vertically abutting against each other to limit vertical displacement. Thus, the spherical crown support assembly improves the overall bearing capacity and deformation adaptability of the bearing. The abutting engagement of the first and second limiting parts mutually restricts vertical displacement, providing tensile strength and preventing bearing detachment or even bridge overturning, thereby ensuring bridge safety. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a cross-sectional schematic diagram of the overall structure in one embodiment of the present invention, illustrating an application scenario.

[0022] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0023] Explanation of icon numbers:

[0024] 10. Upper support plate; 110. Support space; 120. Second flange; 20. Spherical crown support assembly; 210. Spherical crown liner; 220. Lower wear-resistant plate; 230. Upper wear-resistant plate; 30. Lower support plate; 310. Arc groove; 320. First flange; 330. Connector; 331. Pier top bolt; 332. Steel bar; 40. Pier; 50. Superstructure steel beam. Detailed Implementation

[0025] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0026] 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.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0029] Please see the appendix Figure 1 The present invention provides a spherical tensile bearing for rail transit bridges, comprising an upper bearing plate 10, a spherical crown support assembly 20, and a lower bearing plate 30 arranged sequentially from top to bottom, as detailed below:

[0030] The lower support plate 30 is connected to the pier 40 via a connector 330. The upper support plate 10 has a recessed support space 110. The top of the lower support plate 30 extends into the support space 110. The top of the lower support plate 30 has a recessed arc groove 310. The spherical crown support assembly 20 is installed in the arc groove 310 to support between the upper support plate 10 and the lower support plate 30, and the spherical surface of the spherical crown support assembly 20 faces the arc groove 310. The lower support plate 30 has a first limiting part, and the upper support plate 10 has a second limiting part. The first limiting part and the second limiting part are vertically abutting each other to limit vertical displacement.

[0031] Specifically, the spherical tensile bearing for rail transit bridges in this application includes an upper bearing plate 10, a spherical crown support assembly 20, and a lower bearing plate 30 arranged sequentially from top to bottom. The lower bearing plate 30 is used to connect with the pier 40, and it can be fastened to the pier 40 through a connector 330. In a preferred embodiment of this application, the connector 330 can be in the form of a combination of a pier top bolt 331 and a steel bar 332. The pier top bolt 331 can strengthen the connection and fastening between the lower bearing plate 30 and the pier 40, while the steel bar 332... The concrete of the pier 40 is integrated, improving the overall integrity between the lower support plate 30 and the pier 40, thereby enhancing load-bearing capacity and stability. The upper support plate 10 is used to connect with the superstructure steel beam 50, so that the support and the bridge are also integrated, improving the overall integrity of the connection. It can be connected by bolts. The spherical crown support component 20 serves as an intermediate support component, utilizing the curved surface properties of the sphere to adapt to deformation through energy transfer, thereby reducing the damage to the bridge structure caused by excessive deformation and ensuring the stability and safety of the bridge.

[0032] The upper support plate 10 has a recessed support space 110, while the lower support plate 30 has a recessed arc-shaped groove 310. During installation, the top of the lower support plate 30 needs to extend into the support space 110 so that the top of the spherical crown support assembly 20 installed in the arc-shaped groove 310 can be used to support the upper support plate 10, thereby supporting it between the upper support plate 10 and the lower support plate 30. In addition to the support connection, the lower support plate also has a first limiting part, and the upper support plate has a second limiting part. The first limiting part and the upper support plate 30 are recessed into the upper support plate 10. The second limiting part is used for mutual restraint. It achieves the effect of limiting vertical displacement by mutually abutting and interlocking with each other in the vertical direction. Since the lower support plate 30 of the entire support is connected to the pier 40 and the upper support plate 10 is connected to the superstructure steel beam 50, the overall tensile strength is improved under the effect of vertical displacement restriction. At the same time, it prevents the support from falling off or even the bridge from overturning, which greatly ensures the safety of the bridge. It is different from the existing technology that uses beam end ballast and increases the bridge side span to prevent the negative reaction force of the support. It also greatly reduces the amount of work and the construction period.

[0033] In a preferred embodiment of the present invention, the first limiting part is a first flange 320 formed by the outward protrusion of the top sidewall of the lower support plate 30, and the second limiting part is a second flange 120 formed by the protrusion of the bottom inner sidewall of the upper support plate 10. The first flange 320 is used to abut against the upper part of the second flange 120.

[0034] It should be noted that the method of having a first flange 320 protruding from the lower support plate 30 and a second flange 120 protruding from the upper support plate 10 is more convenient to process, and the flanges are integrated with their respective support plate parts, resulting in better overall integrity and easier overall stress distribution; thus, under the mutual abutment of the first flange 320 and the second flange 120 in the vertical direction, vertical displacement is restricted, thereby improving tensile performance.

[0035] In a preferred embodiment of the present invention, the spherical crown support assembly 20 includes a spherical crown liner 210, which is supported between the upper support plate 10 and the lower support plate 30, and the spherical surface of the spherical crown liner 210 is disposed facing the arcuate groove 310.

[0036] It should be noted that the spherical crown liner 210 is a spherical crown-shaped component, which can be made of cast steel, such as carbon cast steel or alloy cast steel. It has high strength and good toughness, can withstand large loads and complex stress states, and has good wear resistance, making it suitable for rotational deformation. It can be understood that the spherical crown liner 210 usually has a spherical surface and a flat surface. When installed in the arc groove 310, the spherical surface matches the arc groove 310 of the lower support plate 30. Here, the matching setting means that the curvature of the spherical surface and the arc groove 310 are consistent, so that the spherical surface and the arc groove 310 can adapt to the deformation of the bridge through rotation, while the flat surface faces the upper support plate 10 for support.

[0037] In a preferred embodiment of the present invention, the spherical crown support assembly 20 further includes a lower wear-resistant plate 220, which is connected between the spherical crown liner 210 and the lower support plate 30.

[0038] It is worth noting that the lower wear-resistant plate 220 is used to reduce the coefficient of friction to improve the rotational flexibility of the spherical crown liner 210, and has good wear resistance and durability. It can withstand repeated sliding friction without being easily worn. Therefore, it is connected between the spherical crown liner 210 (spherical surface) and the lower support plate 30 (arc groove 310).

[0039] In a preferred embodiment of the present invention, the lower wear-resistant plate 220 is an arc-shaped plate, and the concave surface of the lower wear-resistant plate 220 is matched with the spherical surface of the spherical crown liner 210, and the convex surface of the lower wear-resistant plate 220 is matched with the arc-shaped groove 310.

[0040] It is worth noting that an arc-shaped plate is used to match the spherical surface and the arc-shaped groove 310, thereby ensuring a tight connection during installation. This forms an arc-shaped structure with the curvature of the spherical surface of the spherical crown liner 210 and the arc-shaped groove 310 of the lower support plate 30.

[0041] Furthermore, the spherical crown support assembly 20 also includes an upper wear-resistant plate 230, which is connected between the spherical crown liner 210 and the upper support plate 10.

[0042] It should be noted that the upper wear-resistant plate 230 is used to reduce the coefficient of friction between the spherical crown liner 210 and the upper support plate 10, and has good wear resistance and durability. It mainly adapts to deformation through planar displacement, so it is connected between the spherical crown liner 210 and the upper support plate 10. Considering that the spherical crown liner 210 and the upper support plate 10 are in planar contact, the wear-resistant plate can also be a flat plate to ensure tight contact during installation.

[0043] It is worth mentioning that both the upper wear-resistant plate 230 and the lower wear-resistant plate 220 can be made of modified ultra-high molecular weight polyethylene.

[0044] Furthermore, the space between the connector 330 and the concrete of the pier 40 is filled with grout.

[0045] It should be noted that the grout filling the gap between the connector 330 (pier top bolt 331, steel rod 332) and the concrete of the pier 40 can firmly combine the connector 330 and the pier 40 together to form a whole, thereby significantly improving the load-bearing capacity and stability of the connection.

[0046] Furthermore, both the upper wear-resistant plate 230 and the lower wear-resistant plate 220 are made of modified ultra-high molecular weight polyethylene.

[0047] Understandably, modified ultra-high molecular weight polyethylene has excellent wear resistance and self-lubricating properties, making it very suitable for use as a wear-resistant plate.

[0048] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A spherical tensile bearing for a rail transit bridge, characterized in that, It includes, from top to bottom, an upper support plate, a spherical crown support assembly, and a lower support plate; among which, The lower support plate is connected to the pier via a connector. The upper support plate has a recessed support space. The top of the lower support plate extends into the support space. The top of the lower support plate has a recessed arc groove. The spherical crown support assembly is installed in the arc groove to support between the upper support plate and the lower support plate. The spherical surface of the spherical crown support assembly faces the arc groove. The lower support plate has a first limiting part, and the upper support plate has a second limiting part. The first limiting part and the second limiting part are arranged to abut against each other in the vertical direction to limit vertical displacement.

2. Spherical tensile bearing for rail transit bridges according to claim 1, characterized in that, The first limiting part is a first flange protruding outward from the top side wall of the lower support plate, and the second limiting part is a second flange protruding from the bottom inner side wall of the upper support plate. The first flange is used to abut against the upper part of the second flange.

3. The spherical tensile bearing for rail transit bridges according to claim 1, characterised in that, The spherical crown support assembly includes a spherical crown liner plate, which is supported between the upper support plate and the lower support plate, and the spherical surface of the spherical crown liner plate is arranged facing the arcuate groove.

4. Spherical tensile bearing for rail transit bridges according to claim 3, characterized in that, The spherical crown support assembly also includes a lower wear-resistant plate, which is connected between the spherical crown liner and the lower support plate.

5. Spherical tensile bearing for rail transit bridges according to claim 4, characterized in that, The lower wear-resistant plate is an arc-shaped plate, and the concave surface of the lower wear-resistant plate is matched with the spherical surface of the spherical crown liner, and the convex surface of the lower wear-resistant plate is matched with the arc-shaped groove.

6. The spherical tensile bearing for rail transit bridges according to claim 4, characterized in that, The crown support assembly also includes an upper wear-resistant plate, which is connected between the crown liner and the upper support plate.

7. The spherical tensile bearing for rail transit bridges according to claim 6, characterized in that, The upper wear-resistant plate is a flat plate.

8. The spherical tensile bearing for rail transit bridges according to claim 3, characterized in that, The connecting component includes a pier top bolt and a steel bar. The lower support plate is connected to the pier by the pier top bolt. The steel bar is embedded in the pier, and the top of the steel bar is connected to the lower support plate.

9. The spherical tensile bearing for rail transit bridges according to claim 8, characterized in that, The space between the connector and the concrete of the pier is filled with grout.

10. The spherical tensile bearing for rail transit bridges according to claim 6, characterized in that, Both the upper wear-resistant plate and the lower wear-resistant plate are made of modified ultra-high molecular weight polyethylene.

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