Pier column and double-layer steel reinforcement framework thereof

Abstract

The utility model provides a pier column and a double-layer steel reinforcement framework thereof, the double-layer steel reinforcement framework comprises first main reinforcements and second main reinforcements which are arranged in the longitudinal direction of the pier column, the first main reinforcements and the second main reinforcements are arranged in the circumferential direction of the constructed pier column, the second main reinforcements are located on the inner sides of the first main reinforcements to serve as inner-layer main reinforcements, and the first main reinforcements serve as outer-layer main reinforcements; the first main reinforcement is connected with a first spiral stirrup which extends in the length direction of the first main reinforcement and is spirally wound on the periphery of the first main reinforcement, and the second main reinforcement is connected with a second spiral stirrup which extends in the length direction of the second main reinforcement and is spirally wound on the periphery of the second main reinforcement. By arranging the inner and outer layers of main reinforcements and arranging the spiral stirrup structures extending in the longitudinal direction of the main reinforcements corresponding to the two layers of main reinforcements, the bending strength and the shearing strength can be effectively improved, particularly, in the hollow pier column, stress is mainly concentrated on the inner and outer side surfaces of the pier column, so that the stress of the pier column can be balanced, deformation caused by unilateral stress is reduced, and the service life of the pier column is prolonged. Therefore, the overall stability is enhanced.

Description

Technical Field

[0001] This application relates to the field of pier technology, and in particular to a pier and its double-layer steel reinforcement cage. Background Technology

[0002] Piers play a crucial role in building and bridge engineering, their main function being to support and transfer loads. Depending on specific engineering requirements and design conditions, piers can take different forms, including solid and hollow types.

[0003] Currently, the internal reinforcement of the pier columns includes main bars and stirrups. The stirrups are usually single-piece separate stirrups, which are tied with the main bars to form the steel reinforcement skeleton of the pier column. The traditional single-piece separate stirrups provide weak confinement to the concrete in the core area of ​​the pier column, and the overall integrity of the steel reinforcement skeleton is poor. In addition, when processing single-piece separate stirrups, the steel bars must first be cut into the appropriate length, then bent into single-piece separate stirrups, and finally tied with the longitudinal bars to form the steel reinforcement skeleton. The construction process is complicated, with a large amount of work involved in cutting, bending, and tying the steel bars. The tied ends also require additional hooks and laps, which increases the cost of steel. Utility Model Content

[0004] The purpose of this application is to provide a variable cross-section frame column and its steel reinforcement cage, which significantly improves the structural strength and integrity of the steel reinforcement cage of the variable cross-section frame column by using spiral stirrups, is easy to construct, and greatly improves the load-bearing capacity and seismic performance of the variable cross-section frame column.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] As a first aspect, this application relates to a double-layer steel reinforcement cage for a pier column, which includes a first main bar and a second main bar arranged longitudinally along the pier column. Both the first main bar and the second main bar are arranged circumferentially along the pier column being constructed. The second main bar is located inside the first main bar as an inner layer main bar, and the first main bar is an outer layer main bar. The first main bar is connected to a first spiral stirrup extending along its length and spirally wrapped around the outer circumference of the first main bar. The second main bar is connected to a second spiral stirrup extending along its length and spirally wrapped around the outer circumference of the second main bar.

[0007] Further details: Both the first and second spiral stirrups are made by winding a single steel bar.

[0008] Further configuration: Both the first spiral stirrup and the second spiral stirrup include multiple steel bars, and the ends of the multiple steel bars are connected to form a single steel bar and are wound around the outer periphery of the main bar to form a spiral structure.

[0009] Further configuration: the first spiral stirrup and the second spiral stirrup rotate in opposite directions.

[0010] Further configuration: The pitch range of both the first and second spiral stirrups is between 40mm and 80mm.

[0011] Further configuration: Both ends of the first spiral stirrup and the second spiral stirrup are provided with straight sections. The straight section of the first spiral stirrup is perpendicularly connected to the first main bar it is connected to, and the straight section of the second spiral stirrup is perpendicularly connected to the second main bar it is connected to.

[0012] Further configuration: the straight section of the first spiral stirrup is greater than 1.5 times the outer circumference of the first main reinforcement to which it is connected, and the straight section of the second spiral stirrup is greater than 1.5 times the outer circumference of the second main reinforcement to which it is connected.

[0013] Further configuration: A transverse steel bar is provided between the first spiral stirrup and the second spiral stirrup to connect the two.

[0014] Further details: Both the first and second main reinforcing bars are made of precision-rolled threaded steel.

[0015] As a second aspect, this application also relates to a pier column comprising a double-layer steel reinforcement cage as described above.

[0016] Compared with existing technologies, the solution in this application has the following advantages:

[0017] 1. In the double-layer steel reinforcement cage of the pier column involved in this application, by setting two layers of main reinforcement, and providing spiral stirrups extending longitudinally along the main reinforcement, the bending strength and shear strength can be effectively improved. Especially in hollow pier columns, the stress is mainly concentrated on the inner and outer surfaces of the pier column, so as to balance the force on the pier column, reduce the deformation caused by unilateral force, and thus enhance its overall stability.

[0018] 2. The double-layer steel reinforcement cage of the pier column involved in this application uses spiral stirrups instead of traditional single-piece separate stirrups, which reduces the number of steel bar cut-offs and bends, improves the standardization of the double-layer steel reinforcement cage fabrication of the pier column, and also reduces the amount of stirrups used, thereby achieving the goal of reducing construction costs.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0021] Figure 1 This is a structural schematic diagram of one embodiment of the double-layer steel reinforcement cage for the pier column of this application;

[0022] Figure 2 This is a front view of one embodiment of the double-layer steel reinforcement cage of the pier column in this application.

[0023] In the diagram, 1 is the first main reinforcement bar; 2 is the second main reinforcement bar; 3 is the first spiral stirrup; 4 is the second spiral stirrup; 5 is the straight section; and 6 is the connecting reinforcement bar. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0025] It should be understood that the steps described in the method embodiments of this utility model may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this utility model is not limited in this respect.

[0026] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "connection" can refer to a direct connection or an indirect connection via intermediate components (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description.

[0027] It should be noted that the concepts of "first" and "second" mentioned in this utility model are only used to distinguish between devices, modules or units, and are not used to limit these devices, modules or units to necessarily be different devices, modules or units, nor are they used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0028] To address the issues of poor overall integrity and cumbersome processing associated with the current use of single-piece, separate stirrups in the steel reinforcement cage of pier columns, please consider... Figures 1 to 2 This application proposes a pier column and its double-layer steel reinforcement cage, which is embedded in the pier column to reinforce, support and improve the integrity of the pier column concrete.

[0029] The double-layer steel reinforcement cage of the pier column in this application (hereinafter referred to as "double-layer steel reinforcement cage") includes a first main reinforcement 1 and a second main reinforcement 2 arranged along the longitudinal direction of the pier column. The first main reinforcement 1 and the second main reinforcement 2 are both arranged along the circumference of the constructed pier column, so that the first main reinforcement 1 and the second main reinforcement 2 form an inner and outer two-layer main reinforcement structure. The second main reinforcement 2 is located inside the first main reinforcement 1 as the inner layer main reinforcement, and the first main reinforcement 1 is the outer layer main reinforcement. At the same time, the first main reinforcement 1 is connected to a first spiral stirrup 3 that extends along its length direction and is spirally wrapped around the outer circumference of the first main reinforcement 1, and the second main reinforcement 2 is connected to a second spiral stirrup 4 that extends along its length direction and is spirally wrapped around the outer circumference of the second main reinforcement 2.

[0030] The double-layer steel reinforcement cage used in this application effectively improves bending and shear strength, especially in hollow piers where stress is mainly concentrated on the inner and outer surfaces. This balances the load on the pier, reduces deformation caused by unilateral stress, and enhances overall stability. Furthermore, the use of spiral stirrups in the double-layer steel reinforcement cage effectively strengthens the structural integrity of the cage and reduces the number of stirrup cuts and bends, thus improving construction efficiency.

[0031] In this application, both the first spiral stirrup 3 and the second spiral stirrup 4 are made of single steel bars, which effectively improves the structural integrity of the spiral stirrups and enhances the structural integrity of the double-layer steel reinforcement cage of the pier column. This improves the hoop effect of the stirrups on the core concrete of the pier column, and the spiral rib design effectively increases the bond strength between the steel bars and the concrete, enabling the frame column structure to maintain stability under dynamic loads such as earthquakes, and effectively preventing the propagation of concrete cracks. Therefore, in this application, the first spiral stirrup 3 and the second spiral stirrup 4 respectively form a hoop effect on the first main reinforcement 1 and the second main reinforcement 2 in the double-layer steel reinforcement cage, constituting a ring tension, which greatly increases the allowable bending moment and lateral torsional bearing capacity of the pier column, thereby improving the overall bearing capacity and overall stability of the pier column using the double-layer steel reinforcement cage of this application.

[0032] In other embodiments, for ease of transportation, the first spiral stirrup 3 and the second spiral stirrup 4 each include multiple steel bars. After the ends of the multiple steel bars are connected to form a single steel bar, they are respectively wound around the outer periphery of the first main bar 1 and the second main bar 2 to form a spiral structure.

[0033] This application reduces the number of cuts and bends in the stirrups when using single steel bars to form spiral stirrups, thus reducing the amount of stirrups used. Furthermore, when tying with the main reinforcement, the spiral stirrups automatically support the framework, facilitating the positioning and tying of the main reinforcement. The spiral stirrups are wound using a spiral stirrup machine or a spiral reinforcement forming machine. The use of single steel bars reduces the need for hooks and overlaps, thereby accelerating the tying speed between the main reinforcement and the spiral stirrups, improving tying efficiency, and shortening construction time. Additionally, this embodiment uses a wrapping or looping method to tightly bind the main reinforcement and the spiral stirrups together. During tying, it is essential to ensure that all intersections between the spiral stirrups and the main reinforcement are securely tied to prevent loosening or detachment.

[0034] In addition, in this embodiment, the first spiral stirrup 3 and the second spiral stirrup 4 have opposite directions of rotation. Through the synergistic effect of the two layers of spiral stirrups with opposite directions of rotation, the lateral deformation of the core concrete can be more effectively restricted. This helps to give full play to the compressive strength of the concrete and thus improve the load-bearing capacity of the component.

[0035] In this embodiment, the pitch range of the first spiral stirrup 3 and the second spiral stirrup 4 is both between 40mm and 80mm. Spiral stirrups within this pitch range provide good confinement to the concrete, improving the structure's load-bearing capacity and seismic performance. Furthermore, in this embodiment, the spiral stirrups preferably use steel bars with a diameter greater than 12mm to ensure the structural strength of the spiral stirrups.

[0036] Furthermore, both ends of the first spiral stirrup 3 and the second spiral stirrup 4 of this application are provided with straight sections 5. The straight section 5 of the first spiral stirrup 3 is perpendicularly connected to the first main reinforcement 1 it is connected to, and the straight section 5 of the second spiral stirrup 4 is perpendicularly connected to the second main reinforcement 2 it is connected to. The straight section 5 of the first spiral stirrup 3 is greater than 1.5 times the outer circumference of the first main reinforcement 1 it is connected to, and the straight section 5 of the second spiral stirrup 4 is greater than 1.5 times the outer circumference of the second main reinforcement 2 it is connected to. This application improves the stability of the binding between the spiral stirrups and the main reinforcement by setting the straight sections 5, thereby improving the structural stability of the double-layer steel reinforcement cage of this application.

[0037] Furthermore, in this embodiment, a transverse steel bar is provided between the first spiral stirrup 3 and the second spiral stirrup 4 to connect them. This transverse steel bar ensures the relative distance between the first spiral stirrup 3 and the second spiral stirrup 4, thereby improving the structural stability of the double-layer steel reinforcement cage. Simultaneously, the transverse steel bar acts as a bridge connecting the first spiral stirrup 3 and the second spiral stirrup 4, effectively and tightly connecting them to form a more complete and stable structural system. This helps improve the load-bearing capacity of the entire double-layer steel reinforcement cage and the piers using this double-layer steel reinforcement cage, enabling them to better resist external loads.

[0038] In this embodiment, both the first main reinforcement 1 and the second main reinforcement 2 are made of precision rolled threaded steel. Precision rolled threaded steel can improve the load-bearing capacity and seismic resistance of the double-layer steel reinforcement cage. At the same time, precision rolled threaded steel can facilitate the splicing between main reinforcement bars, thereby facilitating the construction of piers of different sizes and making the operation convenient.

[0039] In summary, the double-layer steel reinforcement cage of the pier column in this application adopts two layers of main reinforcement, inner and outer, and uses a winding machine to wind single steel bars to form a two-layer spiral stirrup structure corresponding to the inner and outer main reinforcement. The spiral stirrups are then tied to their corresponding main reinforcements to form a steel reinforcement cage. At the same time, a connecting steel bar 6 is set between the first spiral stirrup 3 and the second spiral stirrup 4, so that the steel reinforcement cage formed by the second main reinforcement 2 and the second spiral reinforcement can be stably placed in the steel reinforcement cage formed by the first main reinforcement 1 and the first spiral reinforcement. This double-layer steel reinforcement cage has good structural integrity. The use of spiral stirrups can play a hoop effect on the concrete of the pier column using this double-layer steel reinforcement cage, effectively improving the bearing capacity and seismic performance of the pier column.

[0040] Furthermore, this application uses spiral stirrups instead of traditional single-piece separated stirrups, which reduces the number of times the steel bars are cut and bent, improves the standardization of the steel reinforcement cage fabrication of variable cross-section frame columns, and also reduces the amount of stirrups used, thereby reducing construction costs.

[0041] The above description is only a partial embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A double-layer steel reinforcement cage for a pier column, characterized in that, It includes a first main reinforcement and a second main reinforcement arranged along the longitudinal direction of the pier column. Both the first main reinforcement and the second main reinforcement are arranged around the circumference of the pier column being constructed. The second main reinforcement is located inside the first main reinforcement as an inner layer main reinforcement, and the first main reinforcement is an outer layer main reinforcement. The first main reinforcement is connected to a first spiral stirrup that extends along its length and is spirally wound around the outer circumference of the first main reinforcement. The second main reinforcement is connected to a second spiral stirrup that extends along its length and is spirally wound around the outer circumference of the second main reinforcement.

2. The double-layer steel reinforcement cage for the pier column according to claim 1, characterized in that, Both the first and second spiral stirrups are made by winding a single steel bar.

3. The double-layer steel reinforcement cage for the pier column according to claim 1, characterized in that, Both the first and second spiral stirrups include multiple steel bars, and the ends of the multiple steel bars are connected to form a single steel bar and are wound around the outer periphery of the main steel bar to form a spiral structure.

4. The double-layer steel reinforcement cage for the pier column according to claim 1, characterized in that, The first spiral stirrup and the second spiral stirrup have opposite directions of rotation.

5. The double-layer steel reinforcement cage for the pier column according to claim 1, characterized in that, The pitch range of both the first and second spiral stirrups is between 40mm and 80mm.

6. The double-layer steel reinforcement cage for the pier column according to claim 1, characterized in that, Both ends of the first spiral stirrup and the second spiral stirrup are provided with straight sections. The straight section of the first spiral stirrup is perpendicularly connected to the first main bar it is connected to, and the straight section of the second spiral stirrup is perpendicularly connected to the second main bar it is connected to.

7. The double-layer steel reinforcement cage for the pier column according to claim 6, characterized in that, The straight section of the first spiral stirrup is greater than 1.5 times the outer circumference of the first main reinforcement to which it is connected, and the straight section of the second spiral stirrup is greater than 1.5 times the outer circumference of the second main reinforcement to which it is connected.

8. The double-layer steel reinforcement cage for the pier column according to claim 1, characterized in that, A transverse steel bar is provided between the first spiral stirrup and the second spiral stirrup to connect the two.

9. The double-layer steel reinforcement cage for the pier column according to claim 1, characterized in that, Both the first and second main reinforcing bars are made of precision-rolled threaded steel.

10. A pier, characterized in that, Includes the double-layer steel reinforcement cage of the pier as described in any one of claims 1-9.

Images