Anti-seismic stop block of bridge

Abstract

The utility model relates to the technical field of bridges, and provides an anti-seismic stop block of a bridge, which comprises a connecting part and a supporting part which are connected with each other, the connecting part is provided with a through hole, an anchoring steel bar can penetrate through the through hole, and the anchoring steel bar is arranged in a cover beam, a support padstone or a pier. According to the device, the anti-seismic check block is prevented from protruding out of the top face of the cover beam, the cover beam does not need to reserve an installation space on the top face, the outer end face of the cover beam can be flush with the end face of the support padstone, the use amount of cover beam materials is saved, the main beam and the bridge deck which are large in self weight exist above the installation position of the connecting part, the connecting part can be pressed more tightly, and the anti-seismic effect is better. Therefore, the foundation stress of the anti-seismic check block is more stable, the transverse displacement of the main beam is effectively resisted by virtue of the self weight of the upper structure, the impact force of the main beam does not need to be resisted independently by virtue of the self weight of the anti-seismic check block, the design size of the anti-seismic check block is effectively reduced, the design difficulty and the construction difficulty are further simplified, and the construction period is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge structures, in particular to an anti-seismic stopper of a bridge. Background Art

[0002] The scale of bridge construction in mountainous areas of western China is constantly expanding, but earthquake disasters occur frequently in mountainous areas. Seismic waves cause large displacement, internal force or damage to the main load-bearing components of the bridge. In severe cases, the main beam of the bridge falls off the cap beam due to excessive displacement, seriously affecting the safety of bridge use and driving on the bridge. Therefore, seismic blocks with the required strength, rigidity and stability are often set at both ends of the cap beam to avoid the occurrence of falling beams.

[0003] The existing technology usually uses concrete blocks, but there are the following technical disadvantages: 1) A placement position needs to be reserved on the top surface of the cap beam, which increases the amount of cap beam material used; 2) In order to achieve the required strength and rigidity, the size is generally designed to be larger, and the convex concrete structure on the block is abrupt. At the same time, in order to adapt to the transverse slope of the bridge deck, the top surface of the cap beam is generally inclined. Large-sized concrete blocks are often a gathering place for water, dust, and impurities, affecting the appearance and durability of the bridge; 3) In order to improve seismic ductility, more steel bars are configured inside the concrete block. The steel bars need to extend downward into the cap beam for anchoring, which has a complex structure. When an earthquake occurs, the anchor connection between the block and the cap beam is weak, and it is easy to fail when the main beam undergoes a large lateral displacement; 4) The construction process requires complicated processes such as steel bar binding, template installation, concrete pouring, and template removal. Especially when repairing bridges in harsh conditions in mountainous areas, more construction processes and slower construction progress will also increase the labor intensity of workers. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the seismic stopper in the prior art is set to a certain height protruding from the top surface of the cap beam, resulting in the need to reserve a placement position for the cap beam and increasing the amount of material used for the cap beam, and to provide a seismic stopper for a bridge.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A seismic stopper for a bridge comprises a connecting portion and a supporting portion which are connected to each other. The connecting portion is provided with a through hole, and the through hole can be passed through an anchoring steel bar. The anchoring steel bar is arranged in a cap beam, a support pedestal stone or a bridge pier.

[0007] The anchoring steel bars can be the steel bars in the cap beam, support pad stone or bridge pier, or they can be newly added steel bars according to actual needs. The newly added steel bars can also be used as pressure-bearing steel bars in the corresponding structure to disperse and relieve the strong pressure from the upper structure. This seismic stopper can be used for horizontal anti-falling beams or longitudinal anti-falling beams according to the actual installation position.

[0008] By adopting the seismic stopper of a bridge described in the utility model, the connecting part is anchored in the cap beam, support cushion stone or bridge pier by anchoring steel bars to form a whole with the corresponding cap beam, support cushion stone or bridge pier, so that it becomes the basis of the seismic stopper. According to actual needs, it can be used to prevent the beam from falling horizontally when it is arranged on the side of the main beam facing the bridge, and it can be used to prevent the beam from falling longitudinally when it is arranged on the side of the end of the main beam. This structure avoids the problem of the seismic stop protruding from the top surface of the cap beam. There is no need to reserve installation space on the top surface of the cap beam, and the outer end surface of the cap beam can be flush with the end surface of the support pad stone, which saves the material of the cap beam and does not infringe on the land red line of the highway engineering project in extreme cases. Moreover, there are main beams and bridge decks with large deadweight above the installation position of the connection part, which can make the connection part pressed more tightly, so the foundation of the seismic stop is more stable, and the deadweight of the upper structure is effectively used to resist the lateral displacement of the main beam, playing the role of "borrowing force to block force". There is no need to rely solely on the deadweight of the seismic stop itself to resist the impact force of the main beam, which effectively reduces the design size of the seismic stop, thereby simplifying the design difficulty and construction difficulty, and shortening the construction period.

[0009] Preferably, the connecting portion comprises at least two first steel plates arranged vertically, the first steel plates are arranged side by side, and the through holes are provided on the first steel plates.

[0010] Further preferably, the first steel plate is welded to the corresponding cap beam, support pedestal stone or bridge pier.

[0011] It can be welded to the corresponding cap beam, support pad stone or steel bars in the pier. If the corresponding cap beam contains a steel structure, it can also be welded to the steel structure to effectively strengthen the connection and improve the reliability of the seismic block in resisting impact.

[0012] Further preferably, the supporting portion includes at least two second steel plates arranged vertically, the second steel plates are arranged side by side, and one end of the steel plate away from the connecting portion is connected to a pressure-bearing steel plate.

[0013] Further preferably, the second steel plate is connected to the first steel plate, and the second steel plate and the corresponding first steel plate are an integrally formed structure.

[0014] Further preferably, the one-piece structure is U-shaped.

[0015] Further preferably, the second steel plate is connected with a stiffening rib.

[0016] Stiffening ribs may be added to each second steel plate individually, or all second steel plates may be connected as a whole by stiffening ribs to achieve stiffening.

[0017] Preferably, the supporting portion is provided with a buffer layer.

[0018] Effectively buffer the impact of collision with the main beam and reduce damage.

[0019] Preferably, the diameter of the through hole is 20-25 mm larger than the diameter of the corresponding anchor steel bar.

[0020] It is convenient for the concrete-filled through holes of the corresponding cap beam, support pad stone or bridge pier to form a pin, so that the connection part forms a combined force-bearing structure, further strengthens the anchor connection performance, and reduces the risk of slippage of the seismic stopper.

[0021] Preferably, when used for a transverse anti-falling beam, the supporting portion is arranged on the side of the main beam; when used for a longitudinal anti-falling beam, the supporting portion is arranged below the main beam.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0023] 1. A seismic stopper for a bridge according to the utility model is adopted, and the connecting part is anchored in the cap beam, support pedestal stone or bridge pier by anchoring steel bars to form a whole with the corresponding cap beam, support pedestal stone or bridge pier, so that it becomes the basis of the seismic stopper, and the supporting part connected to the connecting part is used to support the side wall of the main beam. According to actual needs, the supporting part arranged on the side of the main beam transverse to the bridge can be used to prevent the beam from falling horizontally, and the supporting part arranged on the side of the end of the main beam can be used to prevent the beam from falling longitudinally. This structure avoids the problem of the seismic stop protruding from the top surface of the cap beam. There is no need to reserve installation space on the top surface of the cap beam, and the outer end surface of the cap beam can be flush with the end surface of the support pad stone, which saves the material of the cap beam and does not infringe on the land red line of the highway engineering project in extreme cases. Moreover, there are main beams and bridge decks with large deadweight above the installation position of the connection part, which can make the connection part pressed more tightly, so the foundation of the seismic stop is more stable, and the deadweight of the upper structure is effectively used to resist the lateral displacement of the main beam, playing the role of "borrowing force to block force". There is no need to rely solely on the deadweight of the seismic stop itself to resist the impact force of the main beam, which effectively reduces the design size of the seismic stop, thereby simplifying the design difficulty and construction difficulty, and shortening the construction period.

[0024] 2. The structure of multiple steel plates is convenient for joint resistance to impact and welding with corresponding installation positions, which improves the anchoring performance and the reliability of the seismic block in resisting impact. The seismic ductility is better than that of the concrete block and there will be no sudden brittle failure. The structure is light in weight, easy to hoist and fast in construction. It can be used in conjunction with prefabricated steel bridges or prefabricated steel-concrete composite bridges to increase the assembly rate and accelerate the development of new bridge industrialization.

[0025] 3. Adding a buffer layer can effectively buffer the impact of collision with the main beam and reduce damage.

[0026] 4. The diameter of the through hole is 20-25 mm larger than the diameter of the corresponding anchor steel bar, which is convenient for forming a pinning effect, so that the connection part forms a combined force-bearing structure, further enhances the anchor connection performance, and reduces the risk of slippage of the seismic stopper.

[0027] 5. The one-piece U-shaped structure is easy to process and manufacture in the factory, and the manufacturing quality and efficiency can be guaranteed. Only a small amount of welding work is required on site to complete the installation. There is no need to go through complicated processes such as steel bar binding, formwork installation, concrete pouring, and formwork removal like concrete blocks, which reduces the number and intensity of labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the three-dimensional structure of a seismic stopper of a bridge in Example 1;

[0029] Figure 2 is a schematic diagram of the connection of the buffer layer in Example 1;

[0030] Figure 3 is a three-dimensional schematic diagram of the installation position of a seismic stopper of a bridge in Example 1;

[0031] Figure 4 yes Figure 3 Schematic cross-section diagram;

[0032] Figure 5 yes Figure 3 Schematic elevation diagram of

[0033] Figure 6 It is a schematic diagram of the installation position of a seismic stopper of a bridge in Example 2.

[0034] Icon: 11-first steel plate; 12-through hole; 21-second steel plate; 3-anchor steel bars; 4-cap beam; 5-support cushion stone; 6-pressure-bearing steel plate; 61-buffer layer; 7-stiffening ribs. DETAILED DESCRIPTION

[0035] The utility model is described in detail below in conjunction with the accompanying drawings.

[0036] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in combination with test examples and specific implementation methods. However, this should not be understood as the scope of the above-mentioned subject matter of the utility model is limited to the following embodiments, and all technologies realized based on the content of the utility model belong to the scope of the utility model.

[0037] In the description of the specific embodiments of the present invention, unless otherwise specified, the terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship of the product / equipment / device of the utility model when it is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the utility model or simplifying the description in the specific embodiments, so that technicians can quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0038] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding devices / components / elements are within the error / deviation range, they can still achieve their functions in the solution of the utility model.

[0039] In addition, the expressions “first”, “second”, “third”, etc. that appear in the terms are merely descriptions used to distinguish the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0040] In addition, in the description of the embodiments of the present invention, "several", "multiple" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0041] In addition, in the description of the technical solution of the utility model, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components.

[0042] Example 1

[0043] like Figure 1-Figure 2 As shown, a seismic stopper for a bridge adopted in this embodiment includes a connecting portion and a supporting portion which are interconnected. The connecting portion is provided with a through hole 12, and the through hole 12 can pass an anchoring steel bar 3. The anchoring steel bar 3 is arranged in the cap beam 4, the support pedestal stone 5 or the bridge pier.

[0044] Specifically, the connection portion includes at least two first steel plates 11 arranged vertically, the first steel plates 11 are arranged side by side, and the number of the first steel plates 11 is determined according to the type, weight, seismic fortification level, etc. of the main beam. Figure 1 Only three first steel plates 11 are exemplified, and the connecting portion may also be in the form of a steel box, a steel pipe, an I-shaped steel part, etc. The retaining portion includes at least two second steel plates 21 arranged vertically, and the second steel plates 21 are arranged side by side. The retaining portion may also be in the form of a steel box, a steel pipe, an I-shaped steel part, etc. The number of second steel plates 21 should correspond to the first steel plates 11, and each second steel plate 21 is connected to a first steel plate 11. The second steel plate 21 and the corresponding first steel plate 11 are an integrally formed structure, and the integrally formed structure may be U-shaped, but it does not limit the two arms of the U-shaped structure to be of equal length, nor does it limit the heights of the first steel plate 11 and the second steel plate 21 to be the same. Stiffening steel plates are welded on the outside of the three U-shaped structures as stiffening ribs 7, and of course, each U-shaped structure may also be stiffened separately. The end of the steel plate 21 away from the connecting portion is connected to a pressure-bearing steel plate 6, which is welded to the second steel plate 21. A buffer layer 61 is provided on the pressure-bearing side of the pressure-bearing steel plate 6. If a rubber pad is used to connect the pressure-bearing steel plate 6 with a bolt, the nut of the bolt should be flush with the surface of the rubber pad and should not protrude from the surface of the rubber pad, so as to effectively buffer the impact of the collision with the main beam and reduce damage. The pressure-bearing steel plate 6 can be provided separately for each second steel plate 21, or all second steel plates 21 can be connected to the same pressure-bearing steel plate 6.

[0045] The first steel plate 11 is provided with a plurality of through holes 12, and the anchoring steel bar 3 passes through the first steel plate 11 orthogonally. Of course, according to actual needs, U-shaped tie bars can also be provided to anchor the first steel plate 11. The diameter of the through hole 12 is 20-25 mm larger than the diameter of the corresponding anchoring steel bar 3, so that the concrete filling through hole 12 of the corresponding cap beam 4, support cushion stone 5 or bridge pier can form a pin effect, so that the connection part forms a combined force-bearing structure, further strengthens the anchoring connection performance, and reduces the risk of slippage of the seismic stopper. The anchoring steel bar 3 can be the steel bar in the cap beam 4, support cushion stone 5 or bridge pier itself, or it can be the steel bar newly added according to actual needs. The number, diameter and other parameters are determined according to actual needs. The newly added steel bar can also be used as the pressure-bearing steel bar in the corresponding structure to disperse and relieve the strong pressure transmitted from the upper structure.

[0046] For example, for horizontal anti-fall beams, Figure 3-5 As shown, the anti-seismic blocks are arranged on both sides of the main beam in the transverse direction of the bridge ( Figure 3 The opposite side is not shown in the middle), but it is not limited to that the same anti-fall beam structure must be used on both sides of the main beam. In this embodiment, taking the connection part connected to the support pad stone 5 as an example, the part of the first steel plate 11 extending into the support pad stone 5 can also be welded and connected to the cap beam 4 with a steel structure, so as to improve the reliability of the seismic block in resisting impact.

[0047] The connection part is anchored in the cap beam 4, the support cushion stone 5 or the bridge pier by anchoring the steel bar 3, and forms a whole with the corresponding cap beam 4, the support cushion stone 5 or the bridge pier, so that it becomes the basis of the seismic stopper, and does not need to be set on the top surface of the cap beam, and will not form a barrier to impurities such as water and dust on the top of the cap beam, which is beneficial to the aesthetics and durability of the bridge. The support part connected to the connection part is used to support the side wall of the main beam, and a gap of 3 to 6 cm should be reserved between the side wall of the main beam. If the spacing is too small, the lateral deformation of the main beam caused by daily temperature changes will frequently impact the seismic stopper, affecting the durability of the seismic stopper. If the spacing is too large, the seismic stopper cannot effectively restrain the lateral displacement of the main beam during an earthquake. After the main beam is displaced laterally, the support position changes, affecting the stress of the main beam; in severe cases, the main beam will flip outward and fall due to the failure of the seismic stopper to block in time.

[0048] This structure avoids the problem of the seismic stop protruding from the top surface of the cap beam. There is no need to reserve installation space on the top surface of the cap beam, and the outer end surface of the cap beam can be flush with the end surface of the support pad stone, which saves the material of the cap beam. In extreme cases, it does not infringe on the land red line of the highway engineering project, and will not collect sewage and impurities on the top surface of the cap beam, which is beneficial to the aesthetics and durability of the bridge. Moreover, there are main beams and bridge decks with large deadweight above the installation position of the connection part, which can make the connection part pressed more tightly, so the foundation of the seismic stop is more stable, and the deadweight of the upper structure is effectively used to resist the lateral displacement of the main beam, playing the role of "borrowing force to block force". There is no need to rely solely on the deadweight of the seismic stop itself to resist the impact force of the main beam, which effectively reduces the design size of the seismic stop, thereby simplifying the design difficulty and construction difficulty, and shortening the construction period.

[0049] Example 2

[0050] The anti-seismic block of a bridge used in this embodiment is used for longitudinal anti-falling beams. The anti-seismic block is arranged at both ends of the main beam, such as Figure 6 As shown (only one end of the beam is shown), it is not limited to that both ends of the main beam must adopt the same anti-fall beam structure.

[0051] The supporting part is located below the main beam, and a baffle is arranged on the bottom surface of the main beam to cooperate with the supporting part to prevent the beam from falling. A gap of 3 to 6 cm is also reserved between the supporting part and the baffle.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A seismic stopper for a bridge, characterized in that: It comprises a connecting part and a supporting part which are connected to each other, wherein the connecting part is provided with a through hole (12), wherein the through hole (12) can be penetrated by an anchoring steel bar (3), and the anchoring steel bar (3) is arranged in a cap beam (4), a support cushion stone (5) or a bridge pier.

2. The anti-seismic stopper for a bridge according to claim 1, characterized in that: The connecting portion comprises at least two first steel plates (11) arranged vertically, the first steel plates (11) are arranged side by side, and the through holes (12) are arranged on the first steel plates (11).

3. The anti-seismic stopper for a bridge according to claim 2, characterized in that: The first steel plate (11) is welded to the corresponding cap beam (4), support cushion stone (5) or bridge pier.

4. The anti-seismic stopper for a bridge according to claim 2, characterized in that: The retaining portion comprises at least two second steel plates (21) arranged vertically, the second steel plates (21) being arranged side by side, and one end of the second steel plate (21) away from the connecting portion is connected to a pressure-bearing steel plate (6).

5. The anti-seismic stopper for a bridge according to claim 4, characterized in that: The second steel plate (21) is connected to the first steel plate (11), and the second steel plate (21) and the corresponding first steel plate (11) are an integrally formed structure.

6. The anti-seismic stopper for a bridge according to claim 5, characterized in that: The integrally formed structure is U-shaped.

7. The anti-seismic stopper for a bridge according to claim 4, characterized in that: The second steel plate (21) is connected with a stiffening rib (7).

8. A seismic stopper for a bridge according to any one of claims 1 to 7, characterized in that: The support portion is provided with a buffer layer (61).

9. A seismic stopper for a bridge according to any one of claims 1 to 7, characterized in that: The diameter of the through hole (12) is 20-25 mm larger than the diameter of the corresponding anchoring steel bar (3).

10. The anti-seismic stopper for a bridge according to any one of claims 1 to 7, characterized in that: When used for a transverse anti-falling beam, the retaining portion is arranged on the side of the main beam; when used for a longitudinal anti-falling beam, the retaining portion is arranged below the main beam.

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