Anti-lift pin device for bridge bearings

Abstract

The present invention provides an anti-pull-out pin device for bridge bearings, comprising: a device base plate disposed within an opening in the beam base plate of the bridge bearing; at least one first anchor bolt for passing through the beam base plate and fixing within a main beam and a rubber layer above the bridge bearing; at least one second anchor bolt for passing through the device base plate and fixing within the main beam and the rubber layer; a first vertical plate vertically disposed below the beam base plate; and a second vertical plate vertically disposed below the device base plate, wherein the first vertical plate and the second vertical plate are fixed together.

Description

Technical Field

[0001] This invention relates to the field of bridges, and more particularly to an anti-pull-out pin device for bridge bearings. Background Technology

[0002] Currently, large trucks traveling on highways weigh tens or even hundreds of tons. Some truck owners, in an effort to increase transport efficiency, often overload their vehicles. When these trucks cross bridges (especially single-column pier bridges), the vehicles tend to travel to one side of the bridge deck, placing excessive pressure on that side. This leads to an imbalance of forces on both sides of the bridge deck, causing the bridge deck or the box girder beneath it to overturn from one side, resulting in serious safety accidents.

[0003] Existing bridge bearings are typically installed between the main girder and the piers. Because these bearings are often secured to the main girder with only one anchor bolt on each side, they cannot provide a very secure hold if the main girder is tilted. Therefore, the current technology still carries a relatively high risk of bridge overturning. Summary of the Invention

[0004] To effectively solve the related technical problems, the present invention provides an anti-pull-out pin device for bridge bearings.

[0005] One aspect of the present invention discloses an anti-pull-out pin device for a bridge bearing, which may include: a device base plate disposed within an opening in the beam base plate of the bridge bearing; at least one first anchor bolt for passing through the beam base plate and fixing within a main beam and a rubber layer above the bridge bearing; at least one second anchor bolt for passing through the device base plate and fixing within the main beam and the rubber layer; a first vertical plate vertically disposed below the beam base plate; and a second vertical plate vertically disposed below the device base plate, wherein the first vertical plate and the second vertical plate are fixed together.

[0006] The first vertical plate may have a first hole and the second vertical plate may have a second hole, and the first vertical plate and the second vertical plate may be fixed together by means of bolts through the first hole and the second hole.

[0007] The first vertical plate and the second vertical plate can be fixed together in the horizontal direction by means of bolts, through the first hole and the second hole.

[0008] At least one of the first hole and the second hole can be an elongated hole.

[0009] At least one washer may be clamped between the first vertical plate and the second vertical plate, and the bolt passes through the at least one washer.

[0010] The first vertical plate can be welded below the bottom plate of the beam and the second vertical plate can be welded below the bottom plate of the device.

[0011] Another aspect of the present invention discloses a bridge bearing in which anti-pull-out pin devices according to embodiments of the present invention are applied at both sides.

[0012] Another aspect of the present invention discloses a bridge comprising bridge supports according to embodiments of the present invention.

[0013] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0014] The above and other objects, features, and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of the invention are illustrated in the drawings by way of example and not limitation, wherein:

[0015] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0016] Figure 1 A schematic cross-sectional view of a bridge support according to the prior art is shown.

[0017] Figure 2 A cross-sectional schematic diagram of the anti-pull-out pin device for bridge bearings according to the present invention is shown in the case of no bridge tilt.

[0018] Figure 3 A cross-sectional schematic diagram of the anti-pull-out pin device for bridge bearings according to the present invention is shown in the presence of bridge tilt.

[0019] Figure 4 A schematic diagram of the vertical plate of the anti-pull-out pin device according to the present invention is shown. Detailed Implementation

[0020] The principles and spirit of the invention will now be described with reference to several exemplary embodiments. It should be understood that these embodiments are given merely to enable those skilled in the art to better understand and implement the invention, and are not intended to limit the scope of the invention in any way. Rather, these embodiments are provided to make this disclosure more thorough and complete, and to fully convey the scope of this disclosure to those skilled in the art.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0022] In this application, it should be understood that terms such as “comprising” or “having” are intended to indicate the presence of features, figures, steps, behaviors, components, portions or combinations thereof disclosed in this specification, and do not exclude the possibility of the presence of one or more other features, figures, steps, behaviors, components, portions or combinations thereof.

[0023] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "to," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0026] Figure 1 A schematic cross-sectional view of a bridge support according to the prior art is shown.

[0027] like Figure 1 As shown, a bridge bearing (referred to as "bearing" in this document) typically includes a base 11, a bearing body 12, a beam bottom plate 15, and an anchor bolt portion 16. The bridge bearing is located below the main beam 13, and a wedge-shaped adhesive layer 14 is provided between the bridge bearing and the main beam 13. The bridge bearing is fixed to the main beam 13 and the wedge-shaped adhesive layer 14 by the anchor bolt portion 16.

[0028] Since the anchor bolt section 16 typically contains only one anchor bolt, when the main beam 13 tilts, the anchor bolt on one side of the main beam 13 is likely to be pulled out from the main beam 13 and the wedge-shaped adhesive layer 14. During the bridge's tilting process, as the degree of tilt increases, the pulled-out portion of the anchor bolt will become increasingly longer, thereby reducing the anchor bolt's fixing capacity to the main beam 13 and the wedge-shaped adhesive layer 14, thus further exacerbating the tilt. This is highly detrimental to preventing bridge tilting and can easily lead to bridge overturning and serious safety accidents.

[0029] Figure 2 A cross-sectional schematic diagram of the anti-pull-out pin device for bridge bearings according to the present invention is shown in the case of no bridge tilt.

[0030] The anti-pull-out pin device according to the invention is generally located as follows Figure 1 Near the anchor bolt portion 16 shown. The pull-out pin device may include: beam bottom plate 21, device bottom plate 22, first vertical plate 241, second vertical plate 242, first anchor bolt 231, second anchor bolt 232, and bolt 26.

[0031] The first anchor bolt 231 passes through a hole in the beam base plate 21 and is fixed to the beam base plate 21, simultaneously securing it to the main beam (not shown) and the adhesive layer (not shown) on the beam base plate 21. In some embodiments, the adhesive layer typically has a wedge shape. An opening is provided in the beam base plate 21, the shape of which matches the shape of the device base plate 22 to accommodate the device base plate 22.

[0032] The second anchor bolt 232 passes through the hole in the device base plate 22 and is fixed to the device base plate 22, and is simultaneously fixed to the main beam (not shown) and the wedge-shaped adhesive layer (not shown) on the device base plate 22.

[0033] A first vertical plate 241 is disposed below the beam bottom plate 21, near the device bottom plate 22, and a second vertical plate 242 is disposed below the device bottom plate 22, opposite to the first vertical plate 241. In some embodiments, the first vertical plate 241 and the second vertical plate 242 may be welded to the bottom of the beam bottom plate 21 and the bottom of the device bottom plate 22, respectively. In some embodiments, the first vertical plate 241 and the second vertical plate 242 are arranged to be spaced a certain distance apart in the horizontal direction.

[0034] In some embodiments, the anti-pull-out pin device may further include a gasket portion 27, which is clamped and fixed between the first vertical plate 241 and the second vertical plate 242. In some embodiments, the gasket portion may consist of at least one gasket.

[0035] Figure 4 A schematic diagram of the vertical plate of the anti-pull-out pin device according to the present invention is shown.

[0036] Specifically, Figure 4A first vertical plate 241 is shown. A first hole 251 may be formed in the first vertical plate 241. In some embodiments, the first hole 251 may be an elongated hole. In some embodiments, the shape of the second vertical plate 242 may be the same as the shape of the first vertical plate 241.

[0037] Back Figure 2 It can be seen that... Figure 4 After the first vertical plate 241 and the second vertical plate 242 are set up, when the first hole 251 and the second hole 252 are longitudinally elongated holes, the bolt 26 can be passed through the first hole 251 and the second hole 252 to fix the relative position of the first vertical plate 241 and the second vertical plate 242 in the horizontal direction.

[0038] Since two elongated holes are provided on the two vertical plates respectively and the two vertical plates are fixed by bolts 26, the first vertical plate 241 and the second vertical plate 242 are allowed to undergo a certain degree of relative displacement in the vertical direction.

[0039] Figure 3 A cross-sectional schematic diagram of the anti-pull-out pin device for bridge bearings according to the present invention is shown in the presence of bridge tilt.

[0040] like Figure 3 As shown, when the bridge tilts, the main beam (not shown) and the wedge-shaped adhesive layer (not shown) exert an upward force on the second anchor bolt 232, meaning the bridge tends to pull the second anchor bolt 232 out of the main beam and the wedge-shaped adhesive layer. At this time, since the device base plate 22 is not fixed to the beam base plate 21, the device base plate 22, together with the second vertical plate 242, is pulled upward by the second anchor bolt 232, thereby generating a vertical relative displacement between the first vertical plate 241 and the second vertical plate 242, and ensuring that the second anchor bolt 232 remains located in the main beam and the wedge-shaped adhesive layer even when the bridge is tilted.

[0041] In some embodiments, the number of first anchor bolts 231 and second anchor bolts 232 can both be set to one or more.

[0042] Compared to existing bearings, bearings with pull-out pin devices have a stronger ability to resist bridge tilting. This is because:

[0043] (1) According to the existing technology, it relies on the friction between a single anchor bolt and the main beam and the wedge-shaped adhesive layer for fixation. However, the pull-out pin device of the present invention is fixed to the main beam and the wedge-shaped adhesive layer on one side of the support by at least two anchor bolts. Therefore, not only is the friction between the anchor bolt and the main beam and the wedge-shaped adhesive layer greater, but a holding force against the main beam and the wedge-shaped adhesive layer can also be formed between at least two anchor bolts, which further enhances the fixing effect.

[0044] (2) When the frictional force between the anchor bolt and the main beam and the wedge-shaped adhesive layer, as well as the holding force formed between at least two anchor bolts, are insufficient to resist the bridge tilt, the second anchor bolt 232 can remain within the main beam and the wedge-shaped adhesive layer because the second anchor bolt 232, the device base plate 22, and the second vertical plate 242 can be moved vertically upwards. In other words, during the vertical upward movement of the second anchor bolt 232, the second anchor bolt 232 can always provide a certain amount of frictional force and a certain amount of holding force between the two anchor bolts. This prevents the anchor bolt from gradually losing its fixing ability to the main beam and the wedge-shaped adhesive layer as the tilt increases during the bridge tilting process, thereby preventing further aggravation of the tilt.

[0045] Depending on the bridge design requirements, a support such as... can be installed on one side of the support. Figure 2 The diagram shows an anti-pull-out pin device. In some embodiments, bridge designers may install one or more anti-pull-out pin devices on each side of the support, depending on the specific circumstances.

[0046] Detailed dimensions of an anti-tipping device according to an embodiment of the present invention are shown in the various accompanying drawings. While the spirit and principles of the invention have been described with reference to specific embodiments, it should be understood by those skilled in the art that various modifications, combinations, and substitutions can be made depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A pull-out pin device for a bridge bearing, the bridge bearing comprising a base, a bearing body, a beam bottom plate, and an anchor bolt portion, the bridge bearing being located below a main beam, a wedge-shaped adhesive layer being disposed between the bridge bearing and the main beam, the bridge bearing being fixed together with the main beam and the wedge-shaped adhesive layer by the anchor bolt portion, characterized in that, The anti-pull-out pin device includes: A device base plate is disposed within an opening in the beam base plate of the bridge bearing; the shape of the opening on the beam base plate matches the shape of the device base plate to accommodate the device base plate. At least one first anchor bolt is used to pass through the bottom plate of the beam and be fixed in the main beam and wedge-shaped adhesive layer above the bridge support; At least one second anchor bolt is used to pass through the base plate of the device and be fixed within the main beam and the wedge-shaped adhesive layer; The first vertical plate is vertically positioned below the bottom plate of the beam; and The second vertical plate is vertically arranged below the base plate of the device; The second anchor bolt passes through a hole in the base plate of the device and is fixed to the base plate of the device; The first vertical plate has a first hole, and the second vertical plate has a second hole. Both the first hole and the second hole are longitudinally elongated holes. The first vertical plate and the second vertical plate are fixed together in the horizontal direction by means of bolts through the first hole and the second hole. The second anchor bolt, the device base plate, and the second vertical plate can be moved vertically upward.

2. The anti-pulling pin device according to claim 1, characterized in that, At least one washer is held between the first vertical plate and the second vertical plate, and the bolt passes through the at least one washer.

3. The anti-pulling pin device according to claim 1, characterized in that, The first vertical plate is welded below the bottom plate of the beam and the second vertical plate is welded below the bottom plate of the device.

4. A bridge bearing, characterized in that, The bridge bearing is equipped with at least one anti-pull-out pin device according to any one of claims 1 to 3 on both sides.

5. A bridge, characterized in that, The bridge includes the bridge bearing as described in claim 4.

Images