Novel prefabricated double-column type curve pier

Abstract

The utility model relates to the technical field of bridge engineering, in particular to a novel prefabricated double-column type curve pier which comprises a bearing platform and two curve pier columns, hollow grouting sleeves are pre-buried at the bottom ends of the curve pier columns, grouting holes and grout overflow holes are formed in the side walls of the curve pier columns and are both communicated with the grouting sleeves, and the grouting holes and the grout overflow holes are communicated with the grouting sleeves. According to the prefabricated double-column type curve bridge pier, the stress distribution of the bridge pier is optimized through the unique double-column type curve structure and the outwards-opening curve section, the structural stability is enhanced, the grouting sleeve, the grouting hole and the grout overflow hole are connected in a matched mode, and the prefabricated double-column type curve bridge pier has the advantages that the structure is simple, the construction is convenient, and the construction efficiency is improved. Reliable connection of steel bars between the curve pier columns and the bearing platform is achieved, compactness and integrity of connection are guaranteed, the tie beams are arranged on the curve sections, the cooperative work capacity of the two curve pier columns is effectively enhanced, and the overall performance of the pier is improved; the bridge pier is endowed with a unique aesthetic effect through the structural design, and the requirement of special bridge engineering for modeling is met.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, specifically a novel precast double-column curved bridge pier. Background Technology

[0002] With the continuous development of industrialized construction, prefabrication technology has been widely applied in bridge engineering. Prefabricated bridge piers, with their advantages of fast construction speed, less on-site wet work, and minimal environmental impact, have become an important development direction in modern bridge construction. However, existing prefabricated bridge piers still have certain limitations in terms of structural form and connection methods. Traditional prefabricated bridge piers mostly adopt straight column structures, which are not aesthetically pleasing and spatially adaptable, making it difficult to meet the shape and functional requirements of some special bridge projects. Furthermore, in terms of connection methods, existing prefabricated bridge piers are mostly connected to the abutment or to each other using ordinary steel reinforcement connections or simple splicing methods. These connection methods suffer from insufficient connection strength and poor overall integrity, making it difficult to effectively guarantee the stability and safety of the structure when bearing loads, especially under complex conditions such as earthquakes. Therefore, this utility model develops a novel prefabricated double-column curved bridge pier to solve the above problems. Utility Model Content

[0003] The purpose of this utility model is to provide a novel prefabricated double-column curved bridge pier to solve the technical problems mentioned in the background art.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A novel precast double-column curved bridge pier includes a pier cap and two curved columns. Each curved column comprises a straight section and a curved section, with the curved sections of the two piers exhibiting an outwardly flared structure. A hollow grouting sleeve is pre-embedded at the bottom of each curved column. Some of the reinforcing steel bars inside the curved column pass through the grouting sleeve and protrude from the bottom of the curved column. The pier cap has an interface that mates with the reinforcing steel bars of the curved column. Grouting holes and overflow holes are provided on the sidewalls of the curved piers. Both the grouting holes and overflow holes are connected to the grouting sleeve, with the grouting holes located below the overflow holes. A tie beam connects the two curved columns, and the tie beam is positioned on the curved section of the curved pier.

[0006] Preferably, a stainless steel plate adjusting pad is provided on the top of the support platform.

[0007] Preferably, after the curved pier is installed in connection with the foundation, the gap between the curved pier and the foundation is filled with epoxy mortar.

[0008] Preferably, the tie beam includes two tie beam connecting sections and a wet joint section in the middle of the tie beam, wherein the wet joint section in the middle of the tie beam is cast in place between the two tie beam connecting sections.

[0009] Preferably, the intermediate wet joint section of the tie beam is formed by cast-in-place ultra-high performance concrete, and the connection section of the upper tie beam is roughened during the casting of the intermediate wet joint section of the upper tie beam.

[0010] Preferably, the tie beam connecting section and the curved pier column are integrally cast.

[0011] Preferably, the tie beam is pre-embedded with adjustable tension prestressed steel strands, and both ends of the prestressed steel strands extend into the curved section of the curved pier column.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This utility model's precast double-column curved bridge pier utilizes a unique double-column curved structure. The outward-flaring curved section optimizes the stress distribution of the pier, enhancing structural stability. Furthermore, the connection method involving grouting sleeves, grouting holes, and overflow holes ensures a reliable connection between the reinforcing steel bars of the curved pier and the abutment, guaranteeing the tightness and integrity of the connection. The tie beam, positioned on the curved section, effectively enhances the collaborative working ability of the two curved piers, improving the overall performance of the pier. This structural design also endows the pier with a unique aesthetic effect, meeting the aesthetic requirements of special bridge projects. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the curved bridge pier of this utility model;

[0016] Figure 2 This is a schematic diagram of the pier column in the curved bridge pier of this utility model.

[0017] The attached diagram lists the components represented by each number as follows:

[0018] 1. Pier cap; 2. Curved pier column; 21. Straight section; 22. Curved section; 3. Grouting sleeve; 4. Grouting hole; 5. Overflow hole; 6. Tie beam; 61. Tie beam connection section; 62. Tie beam intermediate wet joint section; 7. Epoxy mortar; 8. Prestressed steel strands. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1-2 As shown: One embodiment of this utility model is as follows:

[0021] A novel precast double-column curved bridge pier includes a pier cap 1 and two curved pier columns 2. Each curved pier column 2 includes a straight section 21 and a curved section 22, with the curved sections 22 of the two curved pier columns 2 having an outwardly flared structure. A hollow grouting sleeve 3 is pre-embedded at the bottom of each curved pier column 2. Some of the reinforcing steel bars inside the curved pier column 2 pass through the grouting sleeve 3 and protrude from the bottom of the curved pier column 2. The pier cap 1 has a mating interface that matches the reinforcing steel bars of the curved pier column 2. Grouting holes 4 and overflow holes 5 are provided on the side walls of the curved pier column 2. Both grouting holes 4 and overflow holes 5 are connected to the grouting sleeve 3, and the grouting holes 4 are located below the overflow holes 5. A tie beam 6 connects the two curved pier columns 2, and the tie beam 6 is located on the curved section 22 of the curved pier column 2.

[0022] In this embodiment, a stainless steel plate adjusting pad is provided on the top of the support 1.

[0023] As can be seen from the above description, the use of stainless steel plate adjusting shims can precisely adjust the installation height and horizontal position of curved piers, ensuring high precision in pier installation, reducing construction errors, and enabling better coordination of the various components of the pier to bear the load. At the same time, the stainless steel material is corrosion resistant, which can extend the service life of the adjusting shims and ensure the stability of the pier during long-term use.

[0024] In this embodiment, after the curved pier 2 and the foundation 1 are installed in relative connection, the gap between the curved pier 2 and the foundation 1 is filled with epoxy mortar 7.

[0025] As can be seen from the above description, epoxy mortar has the characteristics of high strength and good bonding performance. When filled in the gap between the curved pier and the abutment, it can further enhance the connection strength and durability between the two, improve the overall deformation resistance and load-bearing capacity of the pier, effectively prevent external environmental factors from eroding the connection parts, and extend the service life of the pier.

[0026] In this embodiment, the tie beam 6 includes two tie beam connecting sections 61 and a tie beam intermediate wet joint section 62, with the tie beam intermediate wet joint section 62 cast in place between the two tie beam connecting sections 61.

[0027] As can be seen from the above description, the segmented design of the tie beam, combining the prefabricated tie beam connection section and the cast-in-place intermediate wet joint section, not only leverages the advantages of prefabrication and assembly technology in terms of construction speed and easy quality control, but also achieves the overall connection of the tie beam through cast-in-place, ensuring the structural integrity of the tie beam. This construction method reduces the workload of large-scale on-site formwork erection and concrete pouring, shortens the construction period, and facilitates the control of the connection accuracy between the tie beam and the curved pier column.

[0028] In this embodiment, the intermediate wet joint section 62 of the tie beam is formed by casting with ultra-high performance concrete, and the upper tie beam connection section 61 is roughened during the casting of the intermediate wet joint section 62.

[0029] As described above, ultra-high performance concrete possesses excellent properties such as high strength, high toughness, and high durability. When used in the intermediate wet joint section of a tie beam, it can significantly improve the structural strength and tensile properties of the tie beam. Roughening the tie beam connection section increases the bond strength between the old and new concrete, ensuring a strong integral bond between the connection section and the intermediate wet joint section, thereby enhancing the load-bearing capacity and collaborative working ability of the tie beam and ensuring the structural safety of the bridge piers.

[0030] In this embodiment, the tie beam connecting section 61 and the curved pier column 2 are integrally cast.

[0031] As can be seen from the above description, the tie beam connection section and the curved pier are cast in one piece, making the connection between the two more solid, the force transmission path is direct, and the stress concentration phenomenon at the connection point is reduced. This connection method enhances the cooperative performance between the tie beam and the curved pier, improves the stability and reliability of the overall pier structure, and is conducive to better load transfer and distribution.

[0032] In this embodiment, the tie beam 6 is pre-embedded with adjustable tension prestressed steel strands 8, and the two ends of the prestressed steel strands 8 extend into the curved section 22 of the curved pier column 2.

[0033] As can be seen from the above description, the adjustable tension prestressed steel strands embedded inside the tie beam, by applying tension, keep the tie beam under compression, effectively improving the crack resistance of the tie beam and preventing cracks from appearing under load. The two ends of the prestressed steel strands extend into the curved section of the curved pier, enhancing the connection between the tie beam and the curved pier, enabling the tie beam and the curved pier to work together better, further improving the overall bearing capacity and stability of the pier, especially when subjected to large loads or complex working conditions, ensuring the structural safety of the pier.

[0034] The construction process of the aforementioned precast curved bridge piers is as follows:

[0035] During construction, stainless steel adjusting blocks are first installed on the top of the foundation 1 to precisely adjust the installation position and height of the curved pier 2. Then, the reinforcing bars at the bottom of the curved pier 2 are inserted into the joint of the foundation 1, initially aligning the curved pier 2 with the foundation 1. Next, high-strength grout is injected into the grouting sleeve 3 through the grouting holes 4 on the side wall of the curved pier 2. Under pressure, the grout fills the grouting sleeve 3 and overflows from the overflow hole 5, achieving a reliable connection between the reinforcing bars of the curved pier 2 and the foundation 1. After the grout reaches its design strength, epoxy mortar 7 is filled into the gap between the curved pier 2 and the foundation 1 to further enhance the integrity and durability of the connection.

[0036] For the construction of tie beam 6, since tie beam 6 includes two tie beam connection sections 61 integrally cast with curved pier columns 2 and a middle cast-in-place wet joint section 62, after the curved pier columns 2 are installed, the tie beam connection sections 61 are roughened, then formwork is erected, and the middle wet joint section 62 is cast in place using ultra-high performance concrete to ensure good bonding between the tie beam connection sections 61 and the middle wet joint section 62. Adjustable tension prestressed steel strands 8 are pre-embedded inside tie beam 6. After the concrete reaches a certain strength, tension is applied to the prestressed steel strands 8, putting tie beam 6 under compression, improving its crack resistance and load-bearing capacity. Through this construction method, reliable connection and coordinated work between the components of the new precast double-column curved bridge pier are achieved. When bearing loads, the curved pier columns 2 transfer the load to the abutment 1, and tie beam 6 coordinates the two curved pier columns 2 to share the load, ensuring the stability and safety of the overall pier structure.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that modifications may be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel precast double-column curved bridge pier, characterized in that: The structure includes a pier cap (1) and two curved piers (2). The curved piers (2) include a straight section (21) and a curved section (22). The curved sections (22) of the two curved piers (2) are outwardly flared. A hollow grouting sleeve (3) is pre-embedded at the bottom of the curved piers (2). Some of the reinforcing bars inside the curved piers (2) pass through the grouting sleeve (3) and out of the bottom of the curved piers (2). The pier cap (1) has a mating interface that cooperates with the reinforcing bars of the curved piers (2). The side wall of the curved piers (2) has a grouting hole (4) and an overflow hole (5). The grouting hole (4) and the overflow hole (5) are connected to the grouting sleeve (3). The grouting hole (4) is located below the overflow hole (5). A tie beam (6) is connected between the two curved piers (2). The tie beam (6) is located on the curved section (22) of the curved piers (2).

2. The novel precast double-column curved bridge pier according to claim 1, characterized in that: The top of the support platform (1) is provided with a stainless steel plate adjustment pad.

3. A novel precast double-column curved bridge pier according to claim 1, characterized in that: After the curved pier (2) is installed in relation to the foundation (1), the gap between the curved pier (2) and the foundation (1) is filled with epoxy mortar (7).

4. A novel precast double-column curved bridge pier according to claim 1, characterized in that: The tie beam (6) includes two tie beam connecting sections (61) and a tie beam intermediate wet joint section (62), the tie beam intermediate wet joint section (62) being cast in place between the two tie beam connecting sections (61).

5. A novel precast double-column curved bridge pier according to claim 4, characterized in that: The intermediate wet joint section (62) of the tie beam is formed by casting with ultra-high performance concrete, and the upper tie beam connection section (61) is roughened during the casting of the intermediate wet joint section (62).

6. A novel precast double-column curved bridge pier according to claim 4, characterized in that: The tie beam connecting section (61) and the curved pier column (2) are integrally cast.

7. A novel precast double-column curved bridge pier according to claim 1, characterized in that: The tie beam (6) is pre-embedded with adjustable tension prestressed steel strands (8), and both ends of the prestressed steel strands (8) extend into the curved section (22) of the curved pier column (2).

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