High-strength prestressed pier structure

Abstract

The utility model relates to bridge pier structure technical field, especially a high strength prestressed bridge pier structure, including concrete stand column main part, the inside pouring of concrete stand column main part has reinforced cage. The utility model's advantage lies in: after dismantling annular form, the support muscle is installed between first steel cover, second steel cover, and the overall structure strength is strengthened through bolt fixation, the connection of stiffened plate further consolidates steel cover and support plate, and steel pin promotes the combination stability of steel cover and concrete stand column main part. The combination of reinforced cage and concrete promotes the tensile property of stand column, reduces the generation of concrete stand column main part crack, and first steel cover, second steel cover and support muscle form external reinforcement system, and the vehicle load and temperature stress are dispersed, cooperate stiffened plate and steel pin, avoid local stress concentration, significantly improve the bearing capacity and anti -crack performance of bridge pier, prolong the service life, and further can satisfy the construction demand of large -span, high load bridge.

Description

Technical Field

[0001] This utility model relates to the field of bridge pier structure technology, and in particular to a high-strength prestressed bridge pier structure. Background Technology

[0002] Bridge piers are vertical load-bearing components in bridge engineering, used to support the bridge span and transfer loads to the foundation. They typically consist of three parts: the pier body, the pier cap, and the foundation, serving as a crucial node connecting the bridge superstructure and the substructure. Structurally, bridge piers can be categorized into various types, such as solid piers, column piers, thin-walled piers, and vase-shaped piers. Their materials are mostly reinforced concrete, prestressed concrete, or steel, with the specific type determined based on a comprehensive assessment of the bridge span, load size, geological conditions, and surrounding environment. The pier body, as the primary load-bearing component, must possess sufficient strength and stiffness to resist vertical loads transferred from the superstructure, vehicle impacts, and horizontal loads such as wind forces. The pier cap distributes the load and connects the pier body to the beam; its top surface is usually equipped with supports to accommodate the expansion and contraction of the beam. The foundation distributes the load to the ground, ensuring the overall stability of the bridge pier.

[0003] Existing traditional bridge pier structures have significant shortcomings in load-bearing capacity and crack resistance, making it difficult to meet the construction requirements of long-span, high-load bridges. Currently, most bridge piers use ordinary reinforced concrete structures, which have low tensile strength and are prone to cracking under long-term loads from vehicles, temperature stress, and uneven foundation settlement. These cracks not only reduce the overall stiffness of the pier but also allow moisture and corrosive media to penetrate the structure, corroding the reinforcing steel and eroding the concrete, leading to continuous degradation of structural performance and shortening the service life of the bridge pier. Utility Model Content

[0004] Therefore, one objective of this utility model is to propose a high-strength prestressed bridge pier structure to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0005] To achieve the above objectives, one embodiment of this utility model provides a high-strength prestressed bridge pier structure, including a concrete column body. A reinforcing cage is cast inside the concrete column body. A first steel sleeve and a second steel sleeve are fixedly installed at the top and bottom of the concrete column body by bolts. Two symmetrically arranged first support plates are fixedly connected to the outer surface of the first steel sleeve, and two symmetrically arranged second support plates are fixedly connected to the outer surface of the second steel sleeve. A concrete base is fixedly connected to the bottom of the two second support plates by bolts. The bottom ends of the longitudinal reinforcement bars of the reinforcing cage are cast into the inner wall of the concrete base by concrete. Supporting ribs are fixedly installed between the first and second steel sleeves by bolts, and several of the supporting ribs are fixedly connected to the concrete column body by bolts.

[0006] Preferably, in any of the above schemes, the top of the first steel sleeve and the bottom of the second steel sleeve are provided with a plurality of through holes arranged in a circular array, and the bottom and top ends of the longitudinal bars of the steel cage are slidably connected to the first steel sleeve and the second steel sleeve respectively through the through holes.

[0007] Preferably, in any of the above embodiments, a first support is fixedly installed at the top of the first steel sleeve by bolts, a support beam is fixedly connected to the top of the first support, and two second supports are fixedly connected between the bottom of the support beam and the two first support plates.

[0008] Preferably, the top of the first steel sleeve has a pouring hole, the center of which coincides with the axis of the concrete column body.

[0009] Preferably, in any of the above schemes, stiffening plates are fixedly connected between the first steel sleeve and the first support plate, and between the second steel sleeve and the second support plate.

[0010] Preferably, in any of the above schemes, the top and bottom of the concrete column body are reinforced with steel pins cast in concrete, and the first steel sleeve and the second steel sleeve are engaged with the concrete column body by the steel pins.

[0011] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows: 1. First, the bottom end of the reinforcing cage is passed through the through hole into the second steel sleeve and poured into the concrete base, forming a stable connection between the reinforcing cage and the base. Then, the first steel sleeve is installed at the top of the reinforcing cage, using the through hole to limit the longitudinal reinforcement bars. A ring-shaped formwork is assembled outside the first and second steel sleeves, and the main body of the concrete column is poured through the pouring hole, ensuring a tight bond between the concrete and the reinforcing cage. After disassembling the ring-shaped formwork, support bars are installed between the first and second steel sleeves and fixed with bolts to enhance the overall structural strength. Stiffening plates further reinforce the connection between the steel sleeves and the support plates, while steel pins improve the stability of the connection between the steel sleeves and the main body of the concrete column. The combination of the reinforcing cage and concrete improves the tensile strength of the column and reduces cracking. The first and second steel sleeves and support bars form an external reinforcement system, dispersing vehicle loads and temperature stresses. Combined with stiffening plates and steel pins, local stress concentration is avoided, significantly improving the pier's load-bearing capacity and crack resistance, extending its service life, and meeting the construction requirements of long-span, high-load bridges.

[0012] 2. A first support is bolted to the top of the first steel sleeve to form a stable connection between the support beam and the first steel sleeve. Simultaneously, a second support is fixed between the bottom of the support beam and the first support plate to ensure a tight connection between the support beam and the first support plate. Through the coordinated action of the first and second supports, the load of the support beam is transferred to the first steel sleeve and the first support plate respectively. The first support directly bears the vertical load of the support beam and transfers the force to the first steel sleeve, preventing load concentration at the top of the column. The second support further distributes part of the load of the support beam to the first support plate, which then transfers it to the first steel sleeve, forming a multi-point load-bearing structure. This reduces the stress burden on local structures, enhances the stability of the connection between the pier and the superstructure, and ensures that the bridge is not prone to deformation or damage due to load concentration during long-term use. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of the assembly of this utility model; Figure 2 This is a first-view structural schematic diagram of the main body of the concrete column of this utility model; Figure 3 This is a second-view structural diagram of the main body of the concrete column of this utility model; Figure 4 This is a schematic diagram of the structure of the first steel sleeve of this utility model; Figure 5 This is a structural schematic diagram of the steel cage of this utility model.

[0014] In the diagram: 1-Concrete column body, 2-Reinforcing cage, 3-First steel sleeve, 4-Second steel sleeve, 5-First support plate, 6-Second support plate, 7-Concrete base, 8-Support reinforcement, 9-Through hole, 10-First support, 11-Support beam, 12-Second support, 13-Pouring hole, 14-Stiffening plate, 15-Steel pin. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited thereto.

[0016] like Figures 1 to 5As shown, a high-strength prestressed bridge pier structure includes a concrete column body 1, with a reinforcing cage 2 cast inside the concrete column body 1. A first steel sleeve 3 and a second steel sleeve 4 are fixedly installed at the top and bottom of the concrete column body 1 respectively by bolts. Two symmetrically arranged first support plates 5 are fixedly connected to the outer surface of the first steel sleeve 3, and two symmetrically arranged second support plates 6 are fixedly connected to the outer surface of the second steel sleeve 4. A concrete base 7 is fixedly connected to the bottom of the two second support plates 6 by bolts. The bottom ends of the longitudinal bars of the reinforcing cage 2 are cast into the inner wall of the concrete base 7 by concrete. Support bars 8 are fixedly installed between the first steel sleeve 3 and the second steel sleeve 4 by bolts. Several support bars 8 are fixedly connected to the concrete column body 1 by bolts.

[0017] As an optional technical solution of this utility model, the top of the first steel sleeve 3 and the bottom of the second steel sleeve 4 are provided with a plurality of circular array through holes 9. The bottom and top ends of the longitudinal bars of the reinforcing cage 2 are slidably connected to the first steel sleeve 3 and the second steel sleeve 4 respectively through the through holes 9. The through holes 9 on the first steel sleeve 3 and the second steel sleeve 4 are slidably connected to the longitudinal bars of the reinforcing cage 2, which can not only provide precise guidance for the longitudinal bars and ensure the stability of the position of the reinforcing cage 2 in the concrete column body 1, but also enable the longitudinal bars and the steel sleeve to form a cooperative force-bearing structure, transfer the load from the column body to the steel sleeve, and improve the overall load-bearing efficiency of the structure.

[0018] As an optional technical solution of this utility model, the top of the first steel sleeve 3 is fixedly installed with a first support 10 by bolts, and the top of the first support 10 is fixedly connected to a support beam 11. The bottom of the support beam 11 is fixedly connected to two second supports 12 between the two first support plates 5. The first support 10 connects the first steel sleeve 3 and the support beam 11, and cooperates with the second supports 12 to support the bottom of the support beam 11 and the first support plate 5. The load of the support beam 11 can be distributed and transferred to the first steel sleeve 3 and the first support plate 5, avoiding load concentration that could cause local structural damage and enhancing the stability of the connection between the pier and the superstructure.

[0019] As an optional technical solution of this utility model, a pouring hole 13 is provided through the top of the first steel sleeve 3. The center of the pouring hole 13 coincides with the axis of the concrete column body 1. The coincidence of the pouring hole 13 at the top of the first steel sleeve 3 with the axis of the concrete column body 1 facilitates the pouring of concrete into the column during construction, ensuring that the concrete is filled densely. It also provides an operating channel for inspecting or repairing the internal structure of the column during later maintenance, improving the convenience of construction and maintenance.

[0020] As an optional technical solution of this utility model, stiffening plates 14 are fixedly connected between the first steel sleeve 3 and the first support plate 5, and between the second steel sleeve 4 and the second support plate 6. The stiffening plates 14 between the first steel sleeve 3 and the first support plate 5, and between the second steel sleeve 4 and the second support plate 6, can enhance the structural strength of the connection between the steel sleeve and the support plate, prevent the connection from deforming or breaking due to excessive force, and ensure the efficient transmission of load between the steel sleeve and the support plate.

[0021] As an optional technical solution of this utility model, steel pins 15 are cast into the top and bottom of the concrete column body 1 through concrete. The first steel sleeve 3 and the second steel sleeve 4 are connected to the concrete column body 1 through the steel pins 15. The connection between the steel pins 15 at the top and bottom of the concrete column body 1 and the first steel sleeve 3 and the second steel sleeve 4 can enhance the tightness of the connection between the steel sleeve and the concrete column body 1, and prevent relative sliding between the two due to vibration or load. At the same time, the steel pins 15 transmit some stress, further improving the stability of the overall structure.

[0022] In summary, in practical implementation, this embodiment can be installed according to the following steps: 1): First, pass the bottom end of the reinforcing cage 2 through the through hole 9 through the second steel sleeve 4 and pour it into the concrete base 7 to form a stable connection between the reinforcing cage 2 and the base; then install the first steel sleeve 3 on the top of the reinforcing cage 2 and use the through hole 9 to limit the longitudinal bars of the reinforcing cage 2.

[0023] 2): Assemble the ring template outside the first steel sleeve 3 and the second steel sleeve 4, and pour the concrete column body 1 through the pouring hole 13 to make the concrete and the steel cage 2 tightly bonded.

[0024] 3): After disassembling the ring template, install support ribs 8 between the first steel sleeve 3 and the second steel sleeve 4, and fix them with bolts to enhance the overall structural strength.

[0025] In summary, this high-strength prestressed bridge pier structure first involves passing the bottom end of the reinforcing cage 2 through the through hole 9 through the second steel sleeve 4 and pouring it into the concrete base 7, thus forming a stable connection between the reinforcing cage 2 and the base. Then, the first steel sleeve 3 is installed at the top of the reinforcing cage 2, and the through hole 9 is used to limit the longitudinal reinforcement of the reinforcing cage 2. A ring-shaped formwork is then assembled outside the first steel sleeve 3 and the second steel sleeve 4, and the concrete column body 1 is poured through the pouring hole 13, ensuring a tight bond between the concrete and the reinforcing cage 2. After disassembling the ring-shaped formwork, support bars 8 are installed between the first steel sleeve 3 and the second steel sleeve 4 and fixed with bolts to enhance the overall structural strength. The stiffening plate 14 further reinforces the connection between the steel sleeve and the support plate, while the steel pin 15 improves the stability of the connection between the steel sleeve and the concrete column body 1. The combination of the steel cage 2 and concrete enhances the tensile strength of the column and reduces cracking. The first steel sleeve 3, the second steel sleeve 4, and the supporting reinforcement 8 form an external reinforcement system that disperses vehicle loads and temperature stresses. Combined with the stiffening plate 14 and steel pins 15, it avoids local stress concentration, significantly improves the bearing capacity and crack resistance of the pier, extends its service life, and meets the construction requirements of long-span, high-load bridges. The first support 10 is bolted to the top of the first steel sleeve 3, forming a stable connection between the support beam 11 and the first steel sleeve 3. At the same time, the second support 12 is fixed between the bottom of the support beam 11 and the first support plate 5 to ensure a tight connection between the support beam 11 and the first support plate 5. Through the synergistic effect of the first support 10 and the second support 12, the load of the support beam 11 is transferred to the first steel sleeve 3 and the first support plate 5 respectively. The first support 10 directly bears the vertical load of the support beam 11 and transfers the force to the first steel sleeve 3, avoiding load concentration at the top of the column; the second support 12 further distributes part of the load of the support beam 11 to the first support plate 5, and transfers it to the first steel sleeve 3 through the first support plate 5, forming a multi-point stress structure, reducing the stress burden on the local structure, enhancing the stability of the connection between the pier and the superstructure, and ensuring that the bridge is not prone to deformation or damage due to load concentration during long-term use.

Claims

1. A high-strength prestressed bridge pier structure, characterized in that: It includes a concrete column body (1), and a steel cage (2) is poured inside the concrete column body (1). The top and bottom of the concrete column body (1) are respectively fixedly installed with a first steel sleeve (3) and a second steel sleeve (4), and a number of supporting ribs (8) are fixedly installed between the first steel sleeve (3) and the second steel sleeve (4), and the number of supporting ribs (8) are fixedly connected to the concrete column body (1). The outer surface of the first steel sleeve (3) is fixedly connected to two symmetrically arranged first support plates (5), and the outer surface of the second steel sleeve (4) is fixedly connected to two symmetrically arranged second support plates (6). The bottom of the two second support plates (6) is fixedly connected to a concrete base (7), and the bottom end of the longitudinal reinforcement of the steel cage (2) is poured into the inner wall of the concrete base (7) by concrete.

2. The high-strength prestressed bridge pier structure according to claim 1, characterized in that: The top of the first steel sleeve (3) and the bottom of the second steel sleeve (4) are provided with several circular array through holes (9). The bottom and top ends of the longitudinal bars of the steel cage (2) are slidably connected to the first steel sleeve (3) and the second steel sleeve (4) through the through holes (9).

3. A high-strength prestressed bridge pier structure according to claim 2, characterized in that: The top of the first steel sleeve (3) is fixedly installed with a first support (10) by bolts. The top of the first support (10) is fixedly connected with a support beam (11). The bottom of the support beam (11) is fixedly connected with two second supports (12) between the two first support plates (5).

4. A high-strength prestressed bridge pier structure according to claim 3, characterized in that: The top of the first steel sleeve (3) is provided with a pouring hole (13), and the center of the pouring hole (13) coincides with the axis of the concrete column body (1).

5. A high-strength prestressed bridge pier structure according to claim 4, characterized in that: A stiffening plate (14) is fixedly connected between the first steel sleeve (3) and the first support plate (5), and between the second steel sleeve (4) and the second support plate (6).

6. A high-strength prestressed bridge pier structure according to claim 5, characterized in that: The top and bottom of the concrete column body (1) are reinforced with steel pins (15) by concrete pouring. The first steel sleeve (3) and the second steel sleeve (4) are connected to the concrete column body (1) by steel pins (15).

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