A connection structure for the arch ring and the arch support column, and the arch support column thereof.

Abstract

This utility model relates to the field of bridge construction, specifically to a connection structure for the fixed connection between an arch ring and its superstructure. The connection structure includes an embedded steel plate and reinforcing bars in the top plate of the arch ring. The embedded steel plate is located above the reinforcing bars in the top plate, and a shear key is provided on the side of the embedded steel plate facing the reinforcing bars. The reinforcing bars pass through the shear key. An anchoring steel bar is vertically provided on the other side of the embedded steel plate facing the shear key, and the anchoring steel bar is fixedly connected to the shear key. An inner formwork steel plate is provided on the side of the embedded steel plate away from the shear key. Compared to the method of using pad beams in the prior art, using shear keys to connect the arch ring and top plate reinforcing bars, and improving stability through anchoring steel bars, eliminates the need for pad beams to connect the superstructure and arch ring when the arch axis has a large inclination. This reduces the bridge's self-weight, lowers the arch foot bending moment and axial force, and improves the bridge's seismic performance.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction, and in particular to a connection structure for the consolidation of an arch ring and an arch column, and the arch column thereof. Background Technology

[0002] Long-span reinforced concrete arch bridges are widely used in mountainous bridge engineering due to their excellent load-bearing performance and beautiful structural form. To reduce the weight of the bridge superstructure and improve construction efficiency, the arch columns usually adopt a structural form combining reinforced concrete and steel formwork. Among them, the inner formwork of the columns often uses steel structures to achieve standardized and modular construction.

[0003] In practical engineering, the arch axis is often laid out in a catenary configuration. Because the arch axis has a larger inclination angle near the arch foot, the arch slope is steeper, and the column height also increases accordingly, making the connection between the arch and the columns more complex. To ensure a reliable connection between the arch and the steel inner formwork of the columns, existing technologies typically use concrete support beams between them to support the steel formwork structure and provide a structural connection surface. However, as the arch approaches the arch foot, its axis becomes steeper, and the required support beam size gradually increases, resulting in a significant increase in the local self-weight of the arch. This additional load from the support beams increases the bending moment and axial force at the arch foot, which is detrimental to the bridge's seismic resistance. Utility Model Content

[0004] The purpose of this utility model is to overcome the problem that in existing bridges, the connection between the arch support column and the arch ring is made by pad beams. However, in large-span bridges, the size of the pad beams is too large, which will increase the self-weight of the arch ring, thereby increasing the bending moment and axial force at the arch foot, resulting in insufficient seismic performance of the bridge. This utility model provides a connection structure for the arch ring and the arch support column, as well as the arch support column itself.

[0005] In a first aspect, the present invention provides a connection structure for the fixed connection between an arch ring and an arch column, including a pre-embedded steel plate and an arch ring top plate reinforcement bar, wherein the pre-embedded steel plate is located above the arch ring top plate reinforcement bar, and a shear key is provided on the side of the pre-embedded steel plate facing the arch ring top plate reinforcement bar, and the arch ring top plate reinforcement bar passes through the shear key;

[0006] The embedded steel plate is vertically provided with anchoring steel bars on the side facing the shear key, and the anchoring steel bars are fixedly connected to the shear key;

[0007] An inner mold steel plate is provided on the side of the embedded steel plate away from the shear key.

[0008] This invention provides a connection structure for the arch ring and the arch support column. By setting a pre-embedded steel plate, shear keys, and anchoring steel bars, the top steel bars of the arch ring and the inner formwork steel plate can be connected as a whole. This eliminates the need for a support beam to connect the arch support column and the arch ring. Specifically, the top steel bars of the arch ring pass through a shear key under the pre-embedded steel plate, connecting the top steel bars of the arch ring to the pre-embedded steel bars. The anchoring steel bars under the pre-embedded steel plate further improve the stability of this connection structure. Compared to the method of using support beams in the prior art, this invention uses shear keys to connect the top steel bars of the arch ring and anchoring steel bars to improve stability. This eliminates the need for support beams to connect the arch support column and the arch ring when the arch ring axis has a large inclination, reducing the self-weight of the bridge, lowering the arch foot bending moment and axial force, and improving the seismic performance of the bridge.

[0009] Preferably, the shear key is provided along the contour of the bottom surface of the embedded steel plate.

[0010] Shear keys can more fully cover the bottom surface of the embedded steel plate, enhance the interlocking effect between the shear key and the concrete, thereby improving the shear bearing capacity between the embedded steel plate and the concrete component, and enhancing the structural reliability and stress performance of the overall connection.

[0011] Preferably, the shear key includes a steel plate, which is arranged perpendicularly to the embedded steel plate. The steel plate has several through holes, which allow the reinforcing bars of the arch top plate to pass through the shear key.

[0012] The shear key is a steel plate perpendicular to the embedded steel plate, with through holes in the plate allowing the reinforcing bars of the arch top slab to pass through, effectively achieving interlocking anchorage between the reinforcing bars and the shear key. This structure enhances the bond between the shear key and the concrete, improving the shear resistance of the connection interface; furthermore, the interlocking of the reinforcing bars improves the overall load-bearing coordination between the reinforcing bars and the embedded steel plate system, facilitating effective load transfer and enhancing the overall load-bearing capacity and durability of the arch structure.

[0013] Preferably, the anchoring reinforcement includes a first anchor bar arranged vertically, one end of which is connected to the embedded steel plate. The anchoring reinforcement also includes a second anchor bar arranged horizontally, the second anchor bar being connected to the end of the first anchor bar away from the embedded steel plate.

[0014] The transverse arrangement of the second anchor bar enhances the pull-out resistance of the anchoring member in the horizontal direction, preventing the first anchor bar from slipping or being pulled out under load. This improves the overall connection strength and shear and pull-out resistance between the embedded steel plate and the concrete structure, thereby enhancing the overall stability and safety of the structure.

[0015] Preferably, the embedded steel plate has vertical reinforcing ribs on the side facing the shear key, and the reinforcing ribs are arranged alternately with the anchoring reinforcing bars.

[0016] By setting vertical reinforcing bars on the side of the embedded steel plate facing the shear key and arranging them alternately with the anchoring bars, the vertical stiffness and stability of the embedded steel plate can be effectively enhanced, preventing warping or local deformation during casting or under stress. On the other hand, the alternating arrangement of the reinforcing bars and anchoring bars can form multi-directional constraints and interlocking in the concrete, significantly improving the overall synergistic stress performance between the steel bars, steel plate, and concrete, which helps to enhance the shear resistance of the joint area and the durability and reliability of the overall structure.

[0017] Preferably, the reinforcing rib is welded to the embedded steel plate.

[0018] Preferably, the reinforcing rib is a U-shaped rib.

[0019] Preferably, the anchoring steel bar is welded to the embedded steel plate.

[0020] In a second aspect, the present invention also provides an arch-supported column, including the above-mentioned connection structure for the arch ring and the arch-supported column, and further including a concrete section, wherein the inner formwork steel plate is located within the concrete section.

[0021] This utility model provides an arch-supported column. By setting the inner mold steel plate inside the concrete section, it not only facilitates the forming and positioning of the column during construction and avoids the problem of mold displacement during the casting process, but also improves the forming quality and overall stability of the concrete section, enhancing the integration level and durability of the structure. Furthermore, since the bottom of the inner mold steel plate is equipped with a pre-embedded steel plate that connects to the reinforcing steel of the top plate of the arch, the entire arch-supported column can be reliably anchored to the arch, further enhancing the connection stiffness between the column and the arch, effectively resisting the risk of slippage or cracking during the vertical load transfer process, and ensuring the safety and reliability of the structure in long-term service.

[0022] Preferably, the arch support column is connected to the arch ring through the embedded steel plate.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] 1. This utility model provides a connection structure for the arch ring and the arch column to be fixed together. By setting a pre-embedded steel plate, shear key, and anchoring steel bars, the top steel bar of the arch ring and the inner formwork steel plate can be connected as a whole. This eliminates the need for a pad beam to connect the arch column and the arch ring. Specifically, the top steel bar of the arch ring passes through a shear key under the pre-embedded steel plate, and the shear key connects the top steel bar of the arch ring to the pre-embedded steel bar. The anchoring steel bars set under the pre-embedded steel plate further improve the stability of this connection structure. Compared with the method of setting a pad beam in the prior art, this utility model uses a shear key to connect the top steel bar of the arch ring and improves stability with anchoring steel bars. This eliminates the need for a pad beam to connect the arch column and the arch ring when the inclination of the arch ring axis is large, reducing the self-weight of the bridge, reducing the bending moment and axial force at the arch foot, and improving the seismic performance of the bridge.

[0025] 2. This utility model provides an arch-supported column. By setting the inner mold steel plate inside the concrete section, it not only facilitates the forming and positioning of the column during construction and avoids the problem of mold displacement during the casting process, but also improves the forming quality and overall stability of the concrete section, enhances the integration level and durability of the structure, and because the bottom of the inner mold steel plate is provided with a pre-embedded steel plate connected to the reinforcing steel of the top plate of the arch ring, the entire arch-supported column can be reliably anchored to the arch ring, further enhancing the connection stiffness between the column and the arch ring, effectively resisting the risk of slippage or cracking during the vertical load transfer process, and ensuring the safety and reliability of the structure in long-term service. Attached Figure Description

[0026] Figure 1 This is a schematic diagram showing the connection between the reinforcing bars of the top plate of the arch ring and the inner formwork steel plate in this utility model;

[0027] Figure 2 In this utility model Figure 1 Enlarged view of point A;

[0028] Figure 3 This is a schematic diagram showing the connection between the reinforcing bars and shear keys in the top slab of the arch ring of this utility model;

[0029] Figure 4 This is a schematic diagram of the shear key structure in this utility model;

[0030] Figure 5 This is a schematic diagram showing the connection between the shear key and the embedded steel plate in this utility model.

[0031] Markings in the diagram: 1-Embedded steel plate; 2-Arch top plate reinforcement; 3-Shear key; 31-Steel plate; 32-Through hole; 4-Anchor reinforcement; 41-First anchor bar; 42-Second anchor bar; 5-Reinforcing bar; 6-Inner formwork steel plate. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0033] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0034] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0035] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0036] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0037] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0038] Example 1

[0039] like Figure 1 , Figure 2 , Figure 3 and Figure 4 The diagram illustrates a connection structure for the arch ring and the arch-supported column, comprising an inner mold steel plate 631 for forming the arch-supported column and arch ring top plate reinforcing bars 2 for forming the arch ring. An embedded steel plate 1 is provided below the inner mold steel plate 631. A shear key 3 is provided on the side of the embedded steel plate 1 away from the inner mold steel plate 631. The shear key 3 is arranged along the outer contour of the bottom of the embedded steel plate 1, and the steel plate 31 is perpendicular to the embedded steel plate 1. Several through holes 32 are provided on the steel plate 31, allowing the arch ring top plate reinforcing bars 2 to pass through the shear key 3. The shear key 3 is set as a steel plate 31 perpendicular to the embedded steel plate 1, and the through holes 32 on the steel plate 31 allow the arch ring top plate reinforcing bars to pass through the shear key 3, effectively achieving interpenetration and anchorage between the reinforcing bars and the shear key 3. This structure enhances the bond between shear key 3 and concrete, improving the shear resistance of the connection interface. On the other hand, the insertion of reinforcing bars improves the overall load-bearing coordination between the reinforcing bars and the embedded steel plate 1 system, which is conducive to the effective transfer of loads and improves the overall load-bearing capacity and durability of the arch structure.

[0040] The embedded steel plate 1 is also provided with an anchoring steel bar 4 on the side away from the inner mold steel plate 631, and the anchoring steel bar 4 is fixedly connected to the shear key 3.

[0041] In one or more embodiments, the anchoring reinforcement 4 includes a vertically arranged first anchoring reinforcement 41, one end of which is connected to the embedded steel plate 1. The anchoring reinforcement 4 also includes a horizontally arranged second anchoring reinforcement 42, which is connected to the end of the first anchoring reinforcement 41 away from the embedded steel plate 1. The horizontal arrangement of the second anchoring reinforcement 42 enhances the pull-out resistance of the anchoring member in the horizontal direction, preventing the first anchoring reinforcement 41 from slipping or being pulled out under load, thereby improving the overall connection strength and shear and pull-out resistance between the embedded steel plate 1 and the concrete structure, and enhancing the overall stability and safety of the structure.

[0042] Furthermore, the anchoring steel bar 4 is welded to the pre-embedded steel plate 1, as follows: Figure 1 , Figure 2 and Figure 3 As shown.

[0043] In one or more embodiments, the embedded steel plate 1 is provided with vertical reinforcing ribs 5 on the side facing the shear key 3. The reinforcing ribs 5 are staggered with the anchoring steel bars 4. By providing vertical reinforcing ribs 5 on the side of the embedded steel plate 1 facing the shear key 3 and staggering them with the anchoring steel bars 4, the rigidity and stability of the embedded steel plate 1 in the vertical direction can be effectively enhanced, preventing warping or local deformation during casting or under stress. On the other hand, the staggered arrangement between the reinforcing ribs 5 and the anchoring steel bars 4 can form multi-directional constraint and interlocking effect in the concrete, significantly improving the overall synergistic stress performance between the steel bars, steel plate 31 and concrete, which helps to enhance the shear resistance of the joint area and the durability and reliability of the overall structure.

[0044] Furthermore, the reinforcing rib 5 is welded to the embedded steel plate 1, and the reinforcing rib 5 is a U-shaped rib, such as... Figure 1 and Figure 3 As shown.

[0045] In one or more embodiments, the reinforcing ribs 5 are located on both sides of the embedded steel plate 1 (arranged along the extension direction of the arch), and the reinforcing ribs 5 on each side are equally spaced, with at least 15 ribs provided.

[0046] In one or more embodiments, the shear key 3 is arranged along the contour of the bottom surface of the embedded steel plate 1, such as... Figure 5 As shown.

[0047] Example 2

[0048] An arch-supported column includes a connection structure for the arch ring and the arch-supported column as described in Embodiment 1, and also includes a concrete section. The inner mold steel plate 6 is located inside the concrete section. By setting the inner mold steel plate 6 inside the concrete section, it is not only convenient for the forming and positioning of the column during construction and avoids the problem of mold displacement during the casting process, but also improves the forming quality and overall stability of the concrete section, enhances the integration level and durability of the structure, and because the bottom of the inner mold steel plate 6 is provided with a pre-embedded steel plate 1 connected to the reinforcing steel bar 2 of the top plate of the arch ring, the entire arch-supported column can be reliably anchored to the arch ring, further enhancing the connection stiffness between the column and the arch ring, effectively resisting the risk of slippage or cracking during the vertical load transfer process, and ensuring the safety and reliability of the structure in long-term service.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A connection structure for fixing an arch ring to an arch column, characterized in that, Includes a pre-embedded steel plate (1) and an arch top plate reinforcement (2). The pre-embedded steel plate (1) is located above the arch top plate reinforcement (2), and the side of the pre-embedded steel plate (1) facing the arch top plate reinforcement (2) is provided with a shear key (3). The arch top plate reinforcement (2) passes through the shear key (3). The embedded steel plate (1) is provided with vertical anchoring steel bars (4) on the side facing the shear key (3), and the anchoring steel bars (4) are fixedly connected to the shear key (3); The embedded steel plate (1) has an inner mold steel plate (6) on the side away from the shear key (3).

2. The construction of the connection of the arch ring and the upstand column according to claim 1, characterized in that, The shear key (3) is set along the bottom contour of the embedded steel plate (1).

3. The construction of the connection of the arch ring and the upstand according to claim 2, characterized in that, The shear key (3) includes a steel plate (31), which is perpendicular to the embedded steel plate (1). The steel plate (31) has several through holes (32) which can be used for the arch top plate reinforcement (2) to pass through the shear key (3).

4. The construction of the connection of the arch ring and the upstand column according to claim 3, characterized in that, The anchoring reinforcement (4) includes a first anchor bar (41) arranged vertically, one end of which is connected to the pre-embedded steel plate (1). The anchoring reinforcement (4) also includes a second anchor bar (42) arranged horizontally, which is connected to the end of the first anchor bar (41) away from the pre-embedded steel plate (1).

5. The connection structure for the arch ring and the column on the arch as described in claim 4, characterized in that, The embedded steel plate (1) has vertical reinforcing bars (5) on the side facing the shear key (3), and the reinforcing bars (5) are arranged alternately with the anchoring bars (4).

6. The construction of the connection of the arch ring and the upstand column according to claim 5, characterized in that, The reinforcing rib (5) is welded to the embedded steel plate (1).

7. The construction of the connection of the arch ring and the upstand column according to claim 6, characterized in that, The reinforcing rib (5) is a U-shaped rib.

8. A construction for the connection of a vaulting ring to a standing column of a vault according to any one of claims 1 to 7, characterized in that The anchoring steel bar (4) is welded to the embedded steel plate (1).

9. An archway column, characterized by, The connection structure for the arch ring and the arch column as described in any one of claims 1-8 further includes a concrete section, wherein the inner formwork steel plate (6) is located within the concrete section.

10. An archway stand as claimed in claim 9, wherein, The arch support column is connected to the arch ring through the pre-embedded steel plate (1).

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