U-shaped component structure of prefabricated, assembled and reinforced RC bridge column
By using prefabricated U-shaped slabs and UHPC flat slabs for reinforcement, combined with the welding and casting of steel bars and plates, the problems of construction complexity and high cost of RC bridge pier reinforcement are solved, achieving efficient and economical bridge pier reinforcement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGDONG UNIV OF TECH
- Filing Date
- 2026-03-13
- Publication Date
- 2026-04-17
AI Technical Summary
Existing RC bridge pier reinforcement technologies suffer from problems such as complex construction, high cost, poor durability, and poor post-reinforcement ductility, making it difficult to simplify the process, improve reinforcement efficiency, and reduce costs.
The system utilizes prefabricated U-shaped panels and UHPC flat panels, combined with prefabricated reinforcing bars and steel plates. A reinforced structure is formed by welding and pouring UHPC concrete, and a rectangular section RC column reinforcement device is installed on the periphery, simplifying the construction process and improving the reinforcement strength.
It significantly reduces construction time and material consumption, lowers costs, improves reinforcement efficiency and quality, and enhances the stress balance and overall performance of bridge piers.
Smart Images
Figure CN121875199A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of reinforced concrete bridge pier reinforcement technology, specifically to a structure for reinforcing bridge piers using prefabricated U-shaped UHPC components. Background Technology
[0002] As the aging of bridges and other infrastructure intensifies, reinforced concrete bridge piers, as key load-bearing components that support the overall weight and stabilize the bridge structure, play a crucial role in the safety and lifespan of the entire bridge. However, due to the influence of natural environment and human factors, especially for offshore bridges, seawater erosion makes bridge piers extremely vulnerable to damage. Furthermore, traffic accidents and extreme natural disasters cause severe damage and wear to bridge piers, making pier damage a serious symptom currently facing bridges. Corrosion of the reinforcing steel in bridge piers reduces the cross-sectional area and lowers the mechanical properties of the steel. Concrete spalling and cracks in the piers lead to uneven stress distribution, causing traffic hazards and significantly reducing the overall load-bearing capacity, compressive strength, overturning resistance, and stress resistance of the structure, seriously affecting structural safety and causing severe damage to the socio-economic situation. Therefore, reinforced concrete (RC) reinforcement of bridge piers is extremely important.
[0003] Traditional RC bridge pier reinforcement techniques include cross-section enlargement, external steel cladding, steel sleeve reinforcement, and FRP (fiberglass reinforced plastic) reinforcement. However, these methods have revealed numerous problems with the reinforced piers, such as excessive cross-sectional stiffness, poor durability, high protection costs, complex construction, and poor long-term durability. While cross-section enlargement has some effectiveness, it significantly reduces the passage space under the bridge and consumes a large amount of concrete pouring formwork, resulting in low time and energy efficiency. FRP has good corrosion resistance and reinforcement effects, but its brittleness limits the overall ductility of the reinforced composite structure. Steel plate bonding reinforcement suffers from adhesive layer aging and failure, meaning the bonding effectiveness between the steel plate and the original RC pier is difficult to guarantee. Therefore, simplifying the reinforcement process, improving reinforcement efficiency, enhancing the performance of the reinforced piers, and reducing reinforcement costs have become urgent issues to be addressed in bridge construction and maintenance.
[0004] In recent years, ultra-high performance concrete (UHPC) has attracted attention in the engineering community due to its excellent durability, superior mechanical properties, and good bonding performance, and is considered an excellent repair and reinforcement material. The superior material properties of UHPC enable it to exhibit superior performance compared to traditional reinforcement materials in reinforcement applications. However, with the availability of excellent reinforcement materials, improving reinforcement methods is also crucial. Therefore, the use of prefabricated UHPC components for reinforcement offers a new direction for reinforcing bridge piers. The components can be constructed and assembled on-site, significantly reducing the complexity and time required for on-site construction, resulting in significant economic benefits. Furthermore, plant-based design can improve the precision of reinforcement components, thereby reducing economic losses during the reinforcement process.
[0005] However, at present, how to properly install reinforcement components so that they can be used in the reinforcement of bridge piers remains a key technical problem that urgently needs to be solved. Summary of the Invention
[0006] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a U-shaped component structure for prefabricated and reinforced RC bridge pillars, thus creating a new way to solve current technical problems.
[0007] To achieve the above objectives, this invention provides a U-shaped component structure for prefabricated and assembled reinforced RC bridge piers, including a prefabricated and assembled U-shaped plate and a prefabricated UHPC flat plate fitted around the RC bridge pier to be reinforced. Both ends of the prefabricated reinforced U-shaped plate are provided with prefabricated reinforcing steel bars and prefabricated reinforcing steel plates. Both the prefabricated reinforcing steel bars and prefabricated reinforcing steel plates adopt a U-shaped structure. The prefabricated UHPC component flat plate has prefabricated reinforcing round hole fixing steel locks and prefabricated reinforcing square hole fixing steel locks. The prefabricated reinforcing steel bars are connected and spliced through the prefabricated round hole fixing steel locks, and the prefabricated reinforcing steel plates are connected and spliced through the prefabricated square hole fixing steel locks. Furthermore, it also includes a rectangular section RC column reinforcement device around the periphery of the prefabricated and assembled UHPC end U-shaped plate. The rectangular section RC column reinforcement devices are fixed sequentially from top to bottom on the RC bridge pier, and each rectangular section RC column reinforcement device consists of two cylindrical steel pipes and two rectangular reinforcing steel plates. The rectangular reinforcing steel plate has a groove in the middle, and the cylindrical steel pipe is welded and fixed to the rectangular reinforcing steel plate with bolts.
[0008] Preferably, two U-shaped precast structural steel bars and one U-shaped precast structural steel plate are distributed alternately, and a precast UHPC structural U-shaped plate is formed by pouring UHPC concrete.
[0009] Preferably, both ends of the U-shaped precast structural steel bars and U-shaped precast structural steel plates extend out from both ends of the precast assembled UHPC component and connect with the precast UHPC structural planar plate.
[0010] Preferably, both ends of the prefabricated UHPC structural planar panel have prefabricated round hole fixing steel locks adapted to the size of the prefabricated structural steel bars and prefabricated square hole fixing steel locks adapted to the size of the prefabricated structural steel plate.
[0011] Preferably, the precast structural steel bars are welded to the precast round hole fixing steel locks, and the precast structural steel plates are welded to the precast square hole fixing steel locks.
[0012] Preferably, the rectangular cross-section RC column reinforcement device consists of two cylindrical steel pipes and two rectangular reinforcing steel plates.
[0013] Preferably, the rectangular cross-section RC column reinforcement device is installed on the periphery of the prefabricated assembled RC reinforced bridge column structure, with cylindrical steel pipes and rectangular reinforcing steel plates alternately distributed from top to bottom with prefabricated reinforcing steel bars and prefabricated reinforcing steel plates.
[0014] Preferably, the rectangular reinforcing steel plate has a hollow groove in the middle and a circular hole of the same size as the cylindrical steel pipe, which is welded to the cylindrical steel pipe.
[0015] Preferably, the cylindrical steel pipe is welded to the rectangular reinforcing steel plate and extends beyond the rectangular reinforcing steel plate, and is then fixed secondary by bolts on the extended end face.
[0016] In summary, the present invention has the following beneficial effects: This invention discloses a U-shaped component structure for prefabricated and assembled reinforced RC bridge piers. The prefabricated components significantly simplify the reinforcement process, reduce construction time, thereby mitigating economic losses from traffic closures, saving construction energy and materials, reducing construction costs, and improving reinforcement efficiency and quality. Furthermore, the use of U-shaped plate assembly reduces project complexity and improves economic benefits. The prefabricated steel pipes and plates at both ends of the U-shaped plates are welded to prefabricated UHPC parallel plates, further enhancing reinforcement strength. In addition, a rectangular cross-section RC column reinforcement device is fitted around the U-shaped prefabricated reinforcement component structure, strengthening the horizontal stress balance of the bridge pier and providing excellent load-bearing performance. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the U-shaped component structure of the prefabricated assembled reinforced RC bridge column of the present invention; Figure 2 This is a front view of the prefabricated U-shaped panel of the present invention; Figure 3 This is a schematic diagram of the prefabricated UHPC planar plate, the prefabricated round hole steel lock, and the prefabricated square hole fixing steel lock of the present invention; Figure 4 This is a schematic diagram of the prefabricated reinforcing steel bars of the present invention; Figure 5 This is a schematic diagram of the prefabricated reinforcing steel plate of the present invention; Figure 6 This is a schematic diagram of the rectangular cross-section RC column reinforcement device of the present invention; Figure 7 This is a schematic diagram of the rectangular reinforced steel plate structure of the present invention; In the picture: 1. Bridge piers to be reinforced; 2. U-shaped plates at both ends of the precast UHPC; 3. Precast UHPC flat panels; 4. Precast reinforcing steel bars; 5. Precast reinforcing steel plates; 6. Precast reinforcing round hole fixing steel locks; 7. Precast reinforcing square hole fixing steel locks; 8. Cylindrical steel pipes; 9. Rectangular reinforcing steel plates; 10. Bolts. Detailed Implementation
[0018] The present invention will now be described in further detail with reference to the accompanying drawings: refer to Figure 1 The figure shows the overall frame of a U-shaped component structure for prefabricated and reinforced RC bridge piers according to the present invention. (Refer to...) Figure 2 and Figure 3 This includes prefabricated U-shaped plates 2 and prefabricated UHPC flat plates 3, which are fitted around the outer perimeter of the RC bridge column 1 to be reinforced. (Refer to...) Figure 4 and Figure 5 Both ends of the precast reinforced U-shaped plate are equipped with precast reinforcing steel bar structures 4 and precast reinforcing steel plate structures 5. Both the precast reinforcing steel bar 4 and the precast reinforcing steel plate 5 adopt a U-shaped structure. The precast UHPC component's flat plate 3 has precast reinforcing round hole fixing steel locks 6 and precast reinforcing square hole fixing steel locks 7, used for welding and fixing the precast reinforcing steel bar 4 and the precast reinforcing steel plate 5. (See also...) Figure 6 It also includes rectangular cross-section RC column reinforcement devices around the U-shaped plate. These rectangular cross-section RC column reinforcement devices are sequentially fitted onto the U-shaped plate from top to bottom. Each rectangular cross-section RC column reinforcement device consists of two cylindrical steel pipes 8 and two rectangular reinforcing steel plates 9. (Refer to...) Figure 7 The cylindrical steel pipe is welded and fixed to the rectangular reinforcing steel plate by bolts 10.
[0019] refer to Figure 4 and Figure 5 The precast reinforcing steel bars 4 and precast reinforcing steel plates 5 described in this invention are both U-shaped structures. Two precast reinforcing steel bars 4 and one precast reinforcing steel plate 5 are poured with UHPC concrete and distributed alternately.
[0020] refer to Figure 2 After the two precast reinforcing steel bars 4 and one precast reinforcing steel plate 5 are poured, a U-shaped plate required for precast assembly is formed. Furthermore, precast reinforcing round hole fixing steel locks 6 and precast reinforcing square hole fixing steel locks 7, with the same dimensions as the precast reinforcing steel bars 4 and precast reinforcing steel plate 5, are precast on the precast UHPC flat plate 3, as shown below. Figure 3 As shown.
[0021] refer to Figure 3 After the UHPC is poured and forms the U-shaped plate 2, the U-shaped plate is fitted onto the RC bridge column 1 to be reinforced. Then, the prefabricated UHPC flat plate 3 is assembled with prefabricated fixing steel bars 4 and prefabricated fixing steel plates 5 by welding. This achieves the coverage and reinforcement of the bridge column sidewall. Furthermore, the dimensions of the prefabricated UHPC flat plate 3 should be the same as the dimensions of the prefabricated U-shaped plate 2.
[0022] refer to Figure 6 The rectangular cross-section RC column reinforcement device of the present invention consists of two cylindrical steel pipes 8 and two rectangular reinforcing steel plates 9. These are arranged alternately with precast reinforcing steel bars 4 and precast reinforcing steel plates 5 from top to bottom, and are adhered to the periphery of the precast assembled U-shaped plate 2 and UHPC planar plate 3 using adhesive.
[0023] refer to Figure 7 The rectangular reinforcing steel plate 9 has a central groove. Cutting ranges are planned at both ends of the steel plate, and corresponding circular holes are cut at both ends. The cylindrical steel pipe 8 is connected to the rectangular reinforcing steel plate 9 by welding. Both sides of the cylindrical steel pipe 8 extend out of the rectangular reinforcing steel plate 9, and bolts are used for secondary reinforcement in the extended areas.
[0024] The implementation process of this invention is as follows: Step 1: First, prefabricate the U-shaped plate 2 and UHPC flat plate 3 required for assembly; Step 2: Prefabricate the cylindrical steel pipes 8 and rectangular reinforcing steel plates 9 required for assembly; Step 3: Transport to the construction site and weld the prefabricated U-shaped plate 2 and UHPC flat plate 3 together; Step 4: After welding is completed, install rectangular section devices on the periphery of the assembled U-shaped UHPC reinforcement structure; Step 5: Weld the cylindrical steel pipes 8 and rectangular reinforcing steel plates 9 together in each rectangular section device; Step 6: After the above is completed, reinforce the protruding parts at both ends of the cylindrical steel pipe 8 with bolts.
[0025] Specifically, step 1 also includes: adjusting the reinforcement ratio appropriately according to the size and stress of the RC bridge column to be reinforced; determining the size and shape of the assembled U-shaped plate 2 and UHPC planar plate 3, as well as the quantity, diameter, and distribution of the required prefabricated reinforcing steel bars 4 and prefabricated reinforcing steel plates 5; determining the positions of the prefabricated reinforcing round hole fixing steel locks 6 and prefabricated reinforcing square hole fixing steel locks 7 according to the positions of the steel bars and steel plates, thereby forming the specific dimensions of the UHPC planar plate; and making a reinforcement template according to the positions, pouring UHPC material into the template to form the U-shaped plate 2.
[0026] Precast reinforcing steel bars 4 and precast reinforcing steel plates 5 are distributed alternately at both ends of the required U-shaped plate 2. The UHPC planar plate 3 is formed by casting through the positions of precast reinforcing round holes for fixing steel locks 6 and precast reinforcing square holes for fixing steel locks 7.
[0027] Specifically, step 2 also includes: determining the dimensions of the rectangular section RC column reinforcement device based on the outer dimensions of the U-shaped plate 2 and the UHPC planar plate 3 cast by the template, thereby formulating the corresponding cylindrical reinforcement steel pipe 8 and rectangular reinforcement steel plate 9. The specific location of the rectangular section RC column reinforcement device is determined based on the positions of the precast reinforcement steel bars 4 and precast reinforcement steel plates 5 at both ends of the U-shaped plate 2.
[0028] Based on the dimensions of the cylindrical reinforcing steel pipe 8, circular holes of corresponding sizes are cut into the rectangular reinforcing steel plate 9, and the scum is removed using an air pump and a high-pressure water gun. Furthermore, the dimensions of the cut circular holes should meet the requirements of the rectangular groove on the inner side of the rectangular reinforcing steel plate 9, thus enabling welding of the rectangular reinforcing steel plate 9 and the cylindrical reinforcing steel pipe.
[0029] Specifically, step 4 also includes: according to the determined rectangular cross-section RC column reinforcement device, using an adhesive to attach the rectangular cross-section RC column reinforcement device to the periphery of the prefabricated assembled U-shaped plate 2 and UHPC flat plate 3. The adhesive can be a mixture of UHPC material.
[0030] Specifically, step 6 also includes: selecting bolts of appropriate size based on the length of the extended cylindrical reinforcing steel pipe 8 installed by welding to perform secondary reinforcement of the rectangular cross-section RC column reinforcement device, thereby completing the work of reinforcing the RC bridge column.
[0031] This specific implementation is merely an explanation of the present invention and should not be construed as limiting the specific measures of the invention to these descriptions. Those skilled in the art can make non-inventive modifications to this implementation as needed, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present invention.
Claims
1. A U-shaped component structure of a precast assembled reinforced concrete (RC) bridge column, characterized by: The system includes U-shaped plates (2) and prefabricated UHPC flat plates (3) fitted around the periphery of the RC bridge column (1) to be reinforced. Both ends of the prefabricated U-shaped plates are equipped with prefabricated reinforcing steel structures (4) and prefabricated reinforcing steel plate structures (5). Both the prefabricated reinforcing steel bars (4) and prefabricated steel plates (5) are U-shaped. The prefabricated UHPC component flat plate (3) has prefabricated reinforcing round hole fixing steel locks (6) and prefabricated reinforcing square hole fixing steel locks (7). The prefabricated reinforcing steel bars (4) are connected and spliced through the prefabricated round hole fixing steel locks (6), and the prefabricated reinforcing steel plates (5) are connected and spliced through the prefabricated square hole fixing steel locks (7). The rectangular section RC column reinforcement device around the periphery of the prefabricated spliced UHPC end U-shaped plate consists of two cylindrical steel pipes (8) and two rectangular reinforcing steel plates (9). The rectangular reinforcing steel plate (9) has a groove in the middle, and the cylindrical steel pipe is welded and fixed to the rectangular reinforcing steel plate (9) by bolts (10).
2. A U-shaped component structure of a precast assembled reinforced concrete bridge column according to claim 1, characterized in that: Two U-shaped precast structural steel bars (4) and one U-shaped precast structural steel plate (5) are distributed alternately, and a precast UHPC structural U-shaped plate is formed by pouring UHPC concrete.
3. A U-shaped section of a precast segmental reinforced concrete bridge pier according to claim 1, wherein: Both ends of the U-shaped precast structural steel bar (4) and the U-shaped precast structural steel plate (5) extend out of the two ends of the precast assembled UHPC component and are connected to the precast UHPC structural planar plate (2).
4. A U-shaped section of a precast segmental reinforced concrete bridge pier according to claim 1, wherein: Both ends of the prefabricated UHPC structural planar plate (2) have prefabricated round hole fixing steel locks (6) adapted to the size of the prefabricated structural steel bars (4) and prefabricated square hole fixing steel locks (7) adapted to the size of the prefabricated structural steel plate (5).
5. The U-shaped component structure for prefabricated and reinforced RC bridge pillars as described in claim 1, characterized in that: The precast structural steel bars (4) are welded to the precast round hole fixing steel locks (6), and the precast structural steel plates (5) are welded to the precast square hole fixing steel locks (7).
6. The U-shaped component structure for prefabricated and reinforced RC bridge pillars as described in claim 1, characterized in that: The rectangular cross-section RC column reinforcement device consists of two cylindrical steel pipes (8) and two rectangular reinforcement steel plates (9).
7. The structure of the rectangular cross-section RC column reinforcement device as described in claim 6, characterized in that: The rectangular section RC reinforcement device is installed on the periphery of the prefabricated RC reinforced bridge column structure. The cylindrical steel pipe (8) and the rectangular reinforcement steel plate (9) are distributed alternately with the prefabricated reinforcement steel bar (4) and the prefabricated reinforcement steel plate (5) from top to bottom.
8. The structure of the rectangular cross-section RC column reinforcement device as described in claim 6, characterized in that: The rectangular reinforcing steel plate (9) has a hollow groove in the middle and a circular hole of the same size as the cylindrical steel pipe, which is welded to the cylindrical steel pipe (8).
9. The structure of the rectangular cross-section RC column reinforcement device as described in claim 6, characterized in that: The cylindrical steel pipe (8) is welded to the rectangular reinforcing steel plate and extends out of the rectangular reinforcing steel plate. The extended end face is then fixed with bolts (10).