Post-earthquake reinforcing device for railway reinforced concrete pier
By combining anchors and reinforcement cages, the problem of low post-earthquake reinforcement efficiency of railway reinforced concrete bridge piers was solved, achieving rapid and effective repair results and improving the seismic resistance and durability of the bridge piers.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- RAILWAY CONSTR RES INST OF CHINA ACAD OF RAILWAY SCI CO LTD
- Filing Date
- 2025-05-22
- Publication Date
- 2026-05-08
AI Technical Summary
Existing technologies for post-earthquake reinforcement and repair of railway reinforced concrete bridge piers are inefficient and costly. Traditional methods are time-consuming to treat large-section bridge piers, making rapid repair difficult.
Multiple sets of anchors are combined with the reinforcement cage, and the anchors are pre-anchored to the reinforced concrete piers. The integral structure is formed by pouring concrete blocks, which simplifies the construction process and reduces secondary damage to the original structure.
It improved reinforcement efficiency, enhanced the seismic resistance and durability of bridge piers, ensured the tightness of the connection, and met the needs of rapid repair.
Smart Images
Figure CN224213161U_ABST
Abstract
Description
Technical Field
[0001] This application relates to bridge pier reinforcement technology, and more particularly to a post-earthquake reinforcement device for railway reinforced concrete bridge piers. Background Technology
[0002] Over long-term use, bridges are subject to heavy traffic and natural disasters, which can significantly reduce their lifespan. Therefore, bridge maintenance, reinforcement, and renovation are necessary.
[0003] Due to the large design loads and high requirements for structural stress and deformation performance of railway bridges, reinforcement methods generally include external concrete encasing, carbon fiber cloth, and steel plates. This method is effective for reinforcing highway bridge piers with smaller cross-sections, but railway reinforced concrete bridge piers have large cross-sections. Encasing them with steel plates requires fabricating the steel plates themselves, and traditional concrete encasing methods involve large-scale treatment of the original structure, which is time-consuming and does not achieve the effect of rapid post-earthquake repair. Summary of the Invention
[0004] This application provides a post-earthquake reinforcement device for railway reinforced concrete bridge piers, which solves the technical problems of low efficiency and high cost in the reinforcement and repair of railway bridge piers in related technologies.
[0005] This application provides a post-earthquake reinforcement device for railway reinforced concrete bridge piers, used for reinforcing reinforced concrete bridge piers, including:
[0006] Multiple sets of anchors are arranged at intervals along the height direction of the reinforced concrete pier. Each set of anchors has multiple anchors arranged around the circumference of the reinforced concrete pier, and each anchor is anchored to the reinforced concrete pier.
[0007] A reinforcing cage is fitted onto the outer periphery of the reinforced concrete pier and spaced apart from the anchor. The reinforcing cage is used to pour concrete blocks so that the reinforcing cage, the reinforced concrete pier, and the anchor after the concrete blocks are poured form a whole.
[0008] In some possible implementations, at least a portion of the anchor is embedded in the reinforced concrete pier;
[0009] Alternatively, the end of the anchor may be welded to the exposed reinforcing bars of the reinforced concrete pier.
[0010] In some possible implementations, the anchor includes an embedded portion for embedding into the reinforced concrete pier and an exposed portion of the reinforced concrete pier, the surface of the embedded portion having helical reinforcing ribs and the top of the exposed portion having a nut.
[0011] In some possible implementations, the anchor is a prefabricated stud.
[0012] In some possible implementations, the length of the embedded portion is not less than the distance from the outer peripheral surface of the reinforced concrete pier to the reinforcing cage, and the length of the exposed portion is not less than one-third of the thickness of the concrete block.
[0013] In some possible implementations, the reinforcing cage includes transverse steel reinforcement groups and longitudinal steel reinforcement groups. The transverse steel reinforcement groups include a plurality of stirrups spaced apart along the height direction of the reinforced concrete pier, and the longitudinal steel reinforcement groups include a plurality of reinforcing bars spaced apart along the circumferential direction of the reinforced concrete pier. Each reinforcing bar is connected together with a plurality of stirrups.
[0014] In some possible implementations, the reinforcing rib is tied to the stirrup.
[0015] In some possible implementations, the grade of the concrete block is higher than that of the concrete material used in the reinforced concrete pier.
[0016] In some possible implementations, the distance between the reinforcing cage and the outer surface of the poured concrete block is 3-5 cm.
[0017] In some possible implementations, the pitch of the insert is 1m-3mm.
[0018] (1) The post-earthquake reinforcement device for railway reinforced concrete bridge piers provided in this application uses anchors, reinforcement cages and concrete blocks to reinforce the reinforced concrete bridge piers. Compared with high-strength materials such as steel plates and carbon fiber cloth, the anchors, reinforcement cages and concrete used in the embodiments of this application are inexpensive. Under the premise of ensuring reinforcement strength, it has better adaptability to railway reinforced concrete bridge piers with larger cross sections.
[0019] (2) The railway reinforced concrete bridge pier post-earthquake reinforcement device provided in this application uses anchors to embed reinforced concrete bridge piers or directly welds them to the exposed steel bars of reinforced concrete bridge piers, which ensures the connection strength between the anchors and the reinforced concrete bridge piers, thereby improving the integrity and consistency of the subsequent concrete blocks.
[0020] (3) The railway reinforced concrete bridge pier post-earthquake reinforcement device provided in this application has an exposed part that allows the anchor to be rotated as a whole, so that the anchor is spirally embedded in the reinforced concrete bridge pier, thereby further improving the connection and fastening effect between the anchor and the reinforced concrete bridge pier.
[0021] (4) The railway reinforced concrete bridge pier post-earthquake reinforcement device provided in this application uses prefabricated studs as anchors, which has low cost, mature processing procedures and strong operability.
[0022] (5) The railway reinforced concrete bridge pier post-earthquake reinforcement device provided in this application can directly repair and reinforce the damaged part of the original structure. Compared with the traditional reinforced concrete wrapping method, it reduces the secondary damage of the original structure to the damaged part by the rebar. Based on the rapid connection of anchors on the damaged surface, it improves the reinforcement efficiency and strengthens the reinforcement performance. Attached Figure Description
[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0024] Figure 1 This is a front view of the post-earthquake reinforcement device for railway reinforced concrete bridge piers according to an embodiment of this application;
[0025] Figure 2 This is a top view of the post-earthquake reinforcement device for railway reinforced concrete bridge piers according to an embodiment of this application.
[0026] Explanation of reference numerals in the attached figures
[0027] 100. Reinforced concrete bridge piers;
[0028] 200. Anchor; 201. Embedded part; 202. Exposed part;
[0029] 300. Stirrups; 301. Reinforcing bars;
[0030] 400. Concrete block.
[0031] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or 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.
[0034] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0035] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.
[0036] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.
[0037] Currently, seismic reinforcement of bridge piers can be divided into two types: (1) Replacing the seismic isolation bearings (indirect method), which weakens the connection between the pier and the beam by using seismic isolation bearings to prevent the inertial force from being transmitted to the pier, thereby protecting the pier from earthquake damage. However, this method is difficult to implement and costly for railway bridges, and the replacement of the bearings also affects the normal operation of trains. (2) Strengthening the piers (direct method), which involves wrapping the piers with concrete, carbon fiber cloth, steel plates, etc. This method is convenient to implement for highway piers with smaller cross sections and has a good reinforcement effect, but railway reinforced concrete piers have large cross sections, and the steel plates need to be remade. The traditional method of wrapping the piers with concrete requires large-scale treatment of the original structure, which takes a long time and cannot achieve the effect of rapid post-earthquake repair.
[0038] Therefore, to solve such problems, this application provides a post-earthquake reinforcement device for railway reinforced concrete bridge piers. By setting multiple sets of anchors for pre-anchoring connection with the reinforced concrete bridge pier, and then using a reinforcement cage to pour concrete blocks, the reinforcement cage, the reinforced concrete bridge pier, and the anchors form a whole after the concrete blocks are poured. This effectively ensures the tight connection between the repaired part and the original reinforced concrete bridge pier, reduces secondary damage to the original damaged part of the structure caused by rebar installation, and allows for rapid connection of anchors based on the damaged surface, improving reinforcement efficiency and strengthening reinforcement performance.
[0039] The post-earthquake reinforcement device for railway reinforced concrete bridge piers provided in this application will be described below with reference to the accompanying drawings.
[0040] like Figure 1 and Figure 2 As shown in the embodiment of this application, the railway reinforced concrete bridge pier post-earthquake reinforcement device is used to reinforce the reinforced concrete bridge pier 100, including multiple sets of anchors 200 and reinforcement cage.
[0041] Multiple sets of anchors 200 are arranged at intervals along the height direction of the reinforced concrete pier 100. Each set of anchors 200 has multiple anchors arranged circumferentially around the reinforced concrete pier 100, and each anchor 200 is anchored to the reinforced concrete pier 100. A reinforcing cage is fitted around the outer periphery of the reinforced concrete pier 100 and is spaced apart from the anchors 200. The reinforcing cage is used to pour concrete blocks 400 so that the reinforcing cage, the reinforced concrete pier 100, and the anchors 200 form a whole after the concrete blocks 400 are poured.
[0042] As can be seen from the above description, the post-earthquake reinforcement device for reinforced concrete bridge piers in this application embodiment effectively enhances the stability and load-bearing capacity of the piers through the design of multiple sets of anchors 200 and a reinforcement cage. The anchors 200 are evenly arranged along the height of the pier and anchored to it, while the reinforcement cage is fitted around the outer perimeter of the pier and spaced apart from the anchors 200. It can be formed into an integral structure by pouring concrete blocks 400, improving the seismic resistance and durability of the pier. This solution simplifies the construction process, avoids large-scale demolition, and ensures uniform stress distribution on the pier through optimized stress design, meeting the needs of rapid post-earthquake recovery.
[0043] like Figure 2 As shown, at least a portion of the anchor 200 provided in this embodiment is embedded in the reinforced concrete pier 100, or the end of the anchor 200 is welded to the exposed reinforcing steel bar of the reinforced concrete pier 100.
[0044] In the above embodiments, when the reinforcing bars are exposed on the damaged surface of the pier after an earthquake, the anchor 200 can be directly welded to the surface of the exposed stirrups 300 or vertical bars; when the reinforcing bars are not exposed on the damaged surface of the pier after an earthquake, holes can be made on the pier surface to embed the anchor 200 therein.
[0045] Furthermore, when the anchor 200 is embedded in the reinforced concrete pier 100, the anchor 200 includes an embedded part 201 for embedding into the reinforced concrete pier 100 and an exposed part 202 that exposes the reinforced concrete pier 100. The surface of the embedded part 201 has helical reinforcing ribs, and the top of the exposed part 202 is constructed with a nut.
[0046] The spiral reinforcing ribs on the surface of the embedded portion 201 of the anchor 200 effectively increase the contact area with the reinforced concrete pier 100, enhancing its embedding effect and providing better fixing force. The nut on the top of the exposed portion 202 provides a convenient way to fix and adjust the anchor 200, helping to ensure its stability and facilitating subsequent adjustments and reinforcement during construction. Therefore, the anchor 200 provides stronger and more reliable support during post-earthquake reinforcement, enhancing the pier's seismic resistance and durability.
[0047] For example, the pitch of the spiral reinforcing ribs in the embedded part 201 is 1mm to 3mm, the length of the embedded part 201 is not less than the distance from the outer peripheral surface of the reinforced concrete pier 100 to the reinforcing cage, and the length of the exposed part 202 is not less than one-third of the thickness of the concrete block 400. This arrangement ensures that the length of the embedded part 201 is not less than the distance from the outer peripheral surface of the reinforced concrete pier 100 to the reinforcing cage, thus ensuring that the anchor 200 can penetrate deeply into the pier, thereby increasing anchoring force and stability, and effectively preventing structural displacement or loosening of the pier after an earthquake. The length of the exposed part 202, being not less than one-third of the thickness of the concrete block 400, ensures sufficient bearing capacity of the anchor 200 after the concrete block 400 is poured, ensuring a tight connection of the overall structure of the reinforced pier, and enhancing seismic performance and long-term durability.
[0048] In some embodiments, the anchor 200 is a prefabricated stud, and the size and specifications of the prefabricated stud can be selected with reference to the size and specifications of the reinforced concrete pier 100. This embodiment of the application does not impose an absolute limitation on this.
[0049] like Figure 1As shown, the reinforced cage in this embodiment includes a transverse steel bar group and a longitudinal steel bar group. The transverse steel bar group includes a plurality of stirrups 300 arranged at intervals along the height direction of the reinforced concrete pier 100. The longitudinal steel bar group includes a plurality of reinforcing bars 301 arranged at intervals along the circumferential direction of the reinforced concrete pier 100. Each reinforcing bar 301 is connected to a plurality of stirrups 300.
[0050] The stirrups 300 of the transverse reinforcement group are arranged at intervals along the height of the reinforced concrete pier 100, which can effectively prevent lateral displacement or crack propagation of the pier after an earthquake and improve its shear resistance. Meanwhile, the reinforcing bars 301 of the longitudinal reinforcement group are arranged at intervals along the circumference of the pier and connect with multiple stirrups 300 to form a robust mesh structure, thereby improving the tensile strength and overall strength of the pier. Through the synergistic effect of the transverse and longitudinal reinforcement, the entire reinforcement cage can provide comprehensive reinforcement for the pier, ensuring its stability under various external forces after an earthquake and enhancing its long-term durability and seismic performance.
[0051] In the above embodiments, the reinforcing rib 301 is tied to the stirrup 300. The tying of the reinforcing rib 301 and the stirrup 300 can be done by steel wire, and this is not absolutely limited in this embodiment.
[0052] In some embodiments, the grade of the concrete block 400 is higher than that of the concrete material used in the reinforced concrete pier 100. Specifically, the grade of the concrete material in the concrete block 400 is half a grade higher than that in the original reinforced concrete pier 100. Higher grade concrete has better compressive strength and wear resistance, which allows the reinforced pier to withstand external forces more effectively. In addition, it can enhance the overall seismic performance of the pier, reduce the generation and propagation of cracks, improve the reinforcement effect, and extend the service life of the pier.
[0053] In the above embodiment, the distance between the reinforcing cage and the outer surface of the poured concrete block 400 is 3-5 cm. This arrangement helps the poured concrete block 400 to solidify uniformly, ensuring that all parts of the concrete can fully integrate with the reinforcing cage to form a solid overall structure, thereby improving the seismic resistance and durability of the bridge pier.
[0054] The post-earthquake reinforcement device for railway reinforced concrete bridge piers according to this application embodiment provides an exemplary reinforcement and repair process for a reinforced concrete bridge pier 100 as follows:
[0055] The surface of the reinforced concrete pier 100 after the earthquake was cleaned, roughened, and drilled. Anchors 200 were embedded at preset intervals. Then, the newly designed reinforcing stirrups 300 and reinforcing bars 301 were tied together to form a reinforcing cage. Reinforcing concrete was poured to form concrete blocks 400, which were then anchored into a whole.
[0056] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.
[0057] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.
Claims
1. A post-earthquake reinforcement device for railway reinforced concrete bridge piers, characterized in that, Used for reinforcing reinforced concrete bridge piers (100), including: Multiple sets of anchors (200) are arranged at intervals along the height direction of the reinforced concrete pier (100). Each set of anchors (200) has multiple anchors arranged circumferentially around the reinforced concrete pier (100). Each anchor (200) is anchored to the reinforced concrete pier (100). The reinforcing cage is fitted onto the outer periphery of the reinforced concrete pier (100) and is spaced apart from the anchor (200). The reinforcing cage is used to pour concrete blocks (400) so that the reinforcing cage, the reinforced concrete pier (100) and the anchor (200) after the concrete blocks (400) are poured form an integral whole.
2. The post-earthquake reinforcement device for railway reinforced concrete bridge piers according to claim 1, characterized in that, At least a portion of the anchor (200) is embedded in the reinforced concrete pier (100); Alternatively, the end of the anchor (200) may be welded to the exposed reinforcing bars of the reinforced concrete pier (100).
3. The post-earthquake reinforcement device for railway reinforced concrete bridge piers according to claim 2, characterized in that, The anchor (200) includes an embedded part (201) for embedding into the reinforced concrete pier (100) and an exposed part (202) for exposing the reinforced concrete pier (100). The surface of the embedded part (201) has helical reinforcing ribs, and the top of the exposed part (202) is constructed with a nut.
4. The post-earthquake reinforcement device for railway reinforced concrete bridge piers according to claim 3, characterized in that, The anchor (200) is a prefabricated stud.
5. The post-earthquake reinforcement device for railway reinforced concrete bridge piers according to claim 3, characterized in that, The length of the embedded part (201) is not less than the distance from the outer peripheral surface of the reinforced concrete pier (100) to the reinforcing cage, and the length of the exposed part (202) is not less than one-third of the thickness of the concrete block (400).
6. The post-earthquake reinforcement device for railway reinforced concrete bridge piers according to claim 1, characterized in that, The reinforced cage includes transverse steel bars and longitudinal steel bars. The transverse steel bars include a plurality of stirrups (300) spaced apart along the height direction of the reinforced concrete pier (100). The longitudinal steel bars include a plurality of reinforcing bars (301) spaced apart along the circumferential direction of the reinforced concrete pier (100). Each reinforcing bar (301) is connected together with a plurality of stirrups (300).
7. The post-earthquake reinforcement device for railway reinforced concrete bridge piers according to claim 6, characterized in that, The reinforcing bar (301) is tied to the stirrup (300).
8. The post-earthquake reinforcement device for railway reinforced concrete bridge piers according to claim 1, characterized in that, The grade of the concrete block (400) is higher than that of the concrete material used in the reinforced concrete pier (100).
9. The post-earthquake reinforcement device for railway reinforced concrete bridge piers according to claim 1, characterized in that, The distance between the reinforced cage and the outer surface of the poured concrete block (400) is 3-5cm.
10. The post-earthquake reinforcement device for railway reinforced concrete bridge piers according to claim 3, characterized in that, The pitch of the embedded part (201) is 1m-3mm.