Concrete filled steel tubular column reinforcing device

Abstract

The invention relates to the technical field of steel pipe concrete column reinforcement, and particularly discloses a steel pipe concrete column reinforcement device which comprises a reinforcement cage, a plurality of positioning lantern rings, a plurality of outer steel pipes and limiting pieces. The reinforcement cage is coaxially sleeved outside the original concrete filled steel tubular column; the plurality of positioning lantern rings comprise inner ring plates and outer ring plates which are coaxially and fixedly connected and are arranged on the original concrete filled steel tubular column at intervals along the length direction; the multiple outer steel pipes are coaxially arranged outside the reinforcement cage in a sleeving mode, and each outer steel pipe is connected between every two adjacent outer ring plates; the limiting pieces are detachably connected to the positioning lantern rings and used for keeping a stable distance between the reinforcement cage and the inner ring plate and a stable distance between the reinforcement cage and the outer ring plate. And concrete is poured between the original steel pipe concrete column and the outer steel pipe. Through cooperation of the positioning lantern rings and the limiting pieces, positioning of the reinforcement cage and the outer steel pipe is achieved, a large amount of welding operation is avoided by means of clamping connection, and the construction efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of steel-concrete composite column reinforcement technology, and in particular to a steel-concrete composite column reinforcement device. Background Technology

[0002] Concrete-tube steel columns are widely used in civil engineering due to their superior strength, good ductility, and excellent fatigue and impact resistance, covering large-span structures, high-rise buildings, underground structures, subway stations, and single-story factories. However, with the acceleration of urbanization and the aging of existing buildings, many in-service concrete-tube steel columns are experiencing structural performance degradation. This degradation can be caused by factors such as chemical corrosion, physical damage, fire, earthquakes, and failure to meet design or construction specifications, potentially leading to insufficient load-bearing capacity and compromising the safety of the concrete-tube steel column structure, necessitating reinforcement and renovation.

[0003] Currently, a common reinforcement method involves installing a reinforcement device on the outside of the original steel-concrete composite column. This device typically consists of an outer steel pipe and an internal reinforcement structure. Concrete is poured into the outer steel pipe, forming a unified structure with the original steel-concrete composite column to share the load. The internal reinforcement structure includes several longitudinally arranged reinforcing bars and rings for fixing the bars. The reinforcing bars are welded to the rings via multiple sets of connecting plates to improve the column's overall integrity and load-bearing capacity.

[0004] However, the existing technology still has some drawbacks. On the one hand, in this scheme, the reinforcing bars are fixed to the annular rings by welding several connecting plates. Due to the large number of reinforcing bars and the multiple sets of connecting plates and annular rings along the length of the reinforcing bars, the workload of limiting the reinforcing bars is large, increasing the complexity and cost of construction. On the other hand, the outer steel pipe is formed by welding two arc-shaped plates together without a limiting structure, making it difficult to ensure that the outer steel pipe is coaxial with the original steel-concrete composite column, thus reducing the quality of reinforcement and potentially affecting the overall performance and load-bearing capacity of the structure. Summary of the Invention

[0005] In order to improve the problems of complex steel bar connection and insufficient positioning accuracy of external steel pipe in the prior art, this application provides a steel pipe concrete column reinforcement device.

[0006] The steel-concrete composite column reinforcement device provided in this application adopts the following technical solution: A steel-concrete composite column reinforcement device, comprising: The reinforcing cage is coaxially fitted outside the original steel-concrete composite column; Multiple positioning collars are spaced apart along the length of the original steel-concrete composite column; each positioning collar includes an inner ring plate and an outer ring plate that are coaxially fixed together, the inner ring plate being coaxially sleeved on the original steel-concrete composite column, and the outer ring plate being located outside the reinforcing cage. Multiple outer steel pipes are coaxially sleeved around the reinforcing cage; each outer steel pipe is connected between two adjacent outer ring plates; The limiting component is detachably connected to the positioning collar to maintain a stable distance between the reinforcing cage and the inner ring plate, and between the reinforcing cage and the outer ring plate. Concrete was poured between the original steel-concrete composite column and the outer steel pipe.

[0007] Furthermore, a plurality of radially arranged connecting plates are fixedly connected between the inner ring plate and the outer ring plate.

[0008] Furthermore, the limiting member includes at least two limiting parts and a connecting part fixed between two adjacent limiting parts; one side of the limiting part is provided with a limiting protrusion that abuts against the outer side of the inner ring plate, and the other side of the limiting part is provided with a limiting groove that is adapted to the vertical reinforcing bars of the reinforcing cage.

[0009] Furthermore, the limiting protrusion and the limiting groove are positioned correspondingly, and both are located on the same radial line of the positioning collar.

[0010] Furthermore, the lower end face of the connecting part is provided with a snap-fit ​​groove that is adapted to be inserted into the connecting plate, and the extending direction of the snap-fit ​​groove is parallel to the axial direction of the positioning collar.

[0011] Furthermore, the connecting portion is arc-shaped, so that the plurality of limiting portions are distributed circumferentially along the inner ring plate.

[0012] Furthermore, each of the positioning collars is provided with a plurality of limiting members, which are evenly distributed along the circumference of the positioning collar.

[0013] Furthermore, a nut is fixed to the outer side of the inner ring plate, and a bolt is threaded onto the nut. The bolt passes radially through the inner ring plate, and the end of the bolt abuts against the original steel-concrete column.

[0014] Furthermore, both the upper and lower end faces of the outer ring plate are provided with insertion grooves for the end of the outer steel pipe to be inserted.

[0015] Furthermore, the outer steel pipe includes multiple interlocking arc-shaped plates with splicing seams between them, and the splicing seams of two adjacent outer steel pipes are staggered.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting positioning collars and limiting components, the spacing between the inner ring plate, the reinforcing cage, and the outer ring plate can be stabilized, thus ensuring that the reinforcing cage, the outer steel pipe, and the original steel pipe concrete column are coaxial. The use of vertical reinforcing bars and limiting grooves for interlocking, as well as connecting plates and interlocking grooves for insertion, avoids a large amount of on-site welding work and helps to improve construction efficiency. 2. The insertion slots on the upper and lower ends of the outer ring plate are inserted into the outer steel pipe to facilitate the fixing of the outer steel pipe; the outer steel pipe is spliced ​​from two opposing arc plates, and the splice seams of two adjacent outer steel pipes are staggered to improve the stability of the outer steel pipe. 3. The radial dimensions of the inner and outer ring plates in the positioning collar of this application can be adjusted according to the size of the component to be reinforced and the construction requirements. In addition, by adjusting the radial dimensions of the positioning collar in different sections, and correspondingly adjusting the size and shape of the outer steel pipe, the reinforcement of irregular structures can be achieved, further improving the applicability of this application. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a steel-concrete composite column reinforcement device according to an embodiment of this application; Figure 2 This is an exploded structural diagram of a steel-concrete composite column reinforcement device according to an embodiment of this application; Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle; Figure 4 This is a schematic diagram of the positioning collar and limiting member in the embodiments of this application; Figure 5 This is a structural schematic diagram of the positioning collar and limiting member from another angle in the embodiments of this application.

[0018] Attached reference numerals: 1. Original steel-concrete composite column; 2. Inner ring plate; 3. Outer ring plate; 4. Connecting plate; 5. Concrete; 6. Limiting block; 7. Limiting protrusion; 8. Limiting groove; 9. Snap-fit ​​groove; 10. Bolt; 11. Nut; 12. Insertion groove; 13. Curved plate; 14. Vertical reinforcement; 15. Circular stirrup. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0020] This application discloses a steel-concrete composite column reinforcement device. (Refer to...) Figure 1 and Figure 2 The steel-concrete composite column reinforcement device includes a steel cage coaxially sleeved outside the original steel-concrete composite column 1. Multiple positioning collars and multiple outer steel pipes are alternately distributed along the axial direction outside the original steel-concrete composite column 1. The multiple outer steel pipes are coaxially sleeved outside the steel cage. Concrete 5 is poured between the original steel-concrete composite column 1 and the outer steel pipes.

[0021] Reference Figure 2The reinforcing cage includes multiple vertical reinforcing bars 14 and multiple annular stirrups 15. The vertical reinforcing bars 14 are parallel to the axial direction of the reinforcing cage and are distributed at intervals along the circumference of the original steel-concrete composite column 1. The annular stirrups 15 are fixed to the multiple vertical reinforcing bars 14 and are distributed at intervals along the length of the original steel-concrete composite column 1. The vertical reinforcing bars 14 and the annular stirrups 15 are fixed together by binding wire.

[0022] Reference Figure 1 and Figure 2 Multiple positioning collars are spaced apart along the length of the original steel-concrete composite column 1. Each positioning collar includes an inner ring plate 2 and an outer ring plate 3 coaxially fixed together. The inner ring plate 2 is coaxially fitted onto the original steel-concrete composite column 1, and the outer ring plate 3 is located outside the reinforcing cage. Multiple radially arranged connecting plates 4 are fixed between the inner ring plate 2 and the outer ring plate 3. In this embodiment, six connecting plates 4 are provided. For ease of assembly, both the inner ring plate 2 and the outer ring plate 3 can be welded together from two semi-circular units. The inner ring plate 2, the outer ring plate 3, and the connecting plates 4 are all connected by welding.

[0023] In order to fix the positioning collar to the original steel-concrete column 1, refer to Figure 3 Nut 11 is welded and fixed to the outer side of the inner ring plate 2. Bolt 10 is threadedly connected to nut 11. Bolt 10 passes through the inner ring plate 2 radially, and the end of bolt 10 abuts against the original steel pipe concrete column 1.

[0024] When installing the positioning collar, first, the two semi-circular units forming the inner ring plate 2 are fitted over the original steel-concrete composite column 1, and the two semi-circular units are welded together to form the inner ring plate 2. Then, connecting plates 4 are welded onto the inner ring plate 2. Next, the two semi-circular units forming the outer ring plate 3 are welded together and fixed with multiple connecting plates 4, completing the assembly of the positioning collar. At this point, the lower end face of the connecting plate 4 abuts against the annular stirrup 15 of the reinforcing cage, thus initially positioning the positioning collar in the vertical direction. Then, the bolts 10 are tightened, so that the ends of the bolts 10 abut against the original steel-concrete composite column 1, thereby fixing the positioning collar to the original steel-concrete composite column 1. In this embodiment, refer to... Figure 4 and Figure 5 Two bolts 10 are arranged as a group, and three groups of bolts 10 are evenly arranged along the circumference of each inner ring plate 2 to increase the stability of the connection between the positioning collar and the original steel pipe concrete column 1.

[0025] Reference Figure 2 , Figure 4 and Figure 5 The outer ring plate 3 has insertion grooves 12 on both its upper and lower ends for inserting the ends of the outer steel pipes. The insertion grooves 12 are annular grooves. The outer steel pipe is made of two interlocking arc plates 13. There is a splicing seam between the two arc plates 13. The splicing seams of two adjacent outer steel pipes are staggered to improve the stability of the outer steel pipe.

[0026] Reference Figure 2 and Figure 3 Three limiting members are detachably connected to the positioning collar, and the three limiting members are evenly distributed along the circumference of the positioning collar; the limiting members are used to maintain a stable distance between the reinforcing cage and the inner ring plate 2, and between the reinforcing cage and the outer ring plate 3.

[0027] Reference Figure 3 , Figure 4 and Figure 5 Specifically, each limiting component includes three limiting parts, with a connecting part fixed between adjacent limiting parts. The connecting part is arc-shaped, causing the multiple limiting parts to be distributed circumferentially along the inner ring plate 2. One side of the limiting part is provided with a limiting protrusion 7 that abuts against the outer side of the inner ring plate 2, and the other side of the limiting part is provided with a limiting groove 8 that is adapted to engage with the vertical reinforcing bars 14 of the reinforcing cage. The limiting protrusion 7 and the limiting groove 8 are positioned correspondingly and are both located on the same radial line of the positioning collar. The lower end face of the connecting part is provided with a snap-fit ​​groove 9 that is adapted to engage with the connecting plate 4. The extending direction of the snap-fit ​​groove 9 is parallel to the axial direction of the positioning collar.

[0028] When installing the limiting component, the connecting plate 4 of the positioning collar is inserted into the snap-fit ​​groove 9 of the limiting component, and the vertical reinforcing bar 14 of the reinforcing cage is embedded into the limiting groove 8 of the limiting component. At this time, the limiting protrusion 7 of the limiting component abuts against the outer side of the inner ring plate 2. In this way, the reinforcing cage is accurately positioned and firmly fixed on the positioning collar, effectively limiting the displacement of the reinforcing cage. This ensures a stable distance between the inner ring plate 2 and the reinforcing cage, that is, a stable distance between the inner ring plate 2, the reinforcing cage, and the outer ring plate 3, thus ensuring coaxiality between the reinforcing cage, the outer steel pipe, and the original steel pipe concrete column 1. The snap-fit ​​engagement of the vertical reinforcing bar 14 with the limiting groove 8 and the insertion engagement of the connecting plate 4 with the snap-fit ​​groove 9 avoids a large amount of on-site welding work, which helps to improve construction efficiency.

[0029] The radial dimensions of the inner ring plate 2 and the outer ring plate 3 in the positioning collar of this application can be adjusted according to the size of the component to be reinforced and the construction requirements. In addition, by adjusting the radial dimensions of the positioning collar in different sections, and correspondingly adjusting the size and shape of the outer steel pipe, the reinforcement of irregular structures can be achieved, further improving the applicability of this application.

[0030] This application discloses a construction method for a steel-concrete composite column reinforcement device, which includes the following steps: Step 1, Install positioning collars: Determine the number of positioning collars based on the height of the original steel pipe concrete column 1 and the height of the outer steel pipe, and complete the assembly and welding of the positioning collars around the perimeter of the original steel pipe concrete column 1.

[0031] Step 2, Arrange the reinforcing cage: Vertical reinforcing bars 14 are laid around the perimeter of the original steel-concrete composite column 1, between the inner ring plate 2 and the outer ring plate 3; then, annular stirrups 15 are wrapped around the vertical reinforcing bars 14 and fixed with binding wire. The annular stirrups 15 provide preliminary positioning of the height of the positioning rings. The spacing and diameter of the annular stirrups 15 need to be determined according to the design requirements to ensure the overall rigidity and strength of the reinforcing cage, while also meeting the construction requirements during concrete pouring; the spacing of the positioning rings is set according to the height of the outer steel pipe.

[0032] Step 3, Reinforcing cage positioning: Fix the positioning collar to the original steel pipe concrete column 1 with bolts 10; then place the positioning piece between the inner ring plate 2 and the reinforcing cage, with the positioning protrusion 7 of the positioning piece abutting against the outside of the inner ring plate 2, and insert the vertical reinforcing bars 14 of the reinforcing cage into the positioning groove 8 of the positioning piece; then slide the positioning piece downwards so that the connecting plate 4 of the positioning collar is inserted into the snap-fit ​​groove 9 of the positioning piece, completing the installation of the positioning piece.

[0033] Step 4, Install the outer steel pipe: Insert the arc-shaped plates 13 into the insertion slots 12 of the outer ring plate 3 in sequence to form the outer steel pipe, and then weld the splice seams between the arc-shaped plates 13.

[0034] The annular stirrups 15 of the reinforcing cage are installed one by one from bottom to top. Correspondingly, the positioning collar, limiting piece and outer steel pipe are also installed layer by layer from bottom to top until the limiting of the entire reinforcing cage and the installation of the outer steel pipe are completed.

[0035] Step 5, pouring concrete: After the steel cage, positioning ring and outer steel pipe are installed, start pouring concrete 5 from the bottom, using layered pouring, and use a vibrator to ensure that the concrete 5 fully fills the space between the outer steel pipe and the original steel pipe concrete column 1; during the pouring process, avoid collision or displacement of the steel cage and positioning ring.

[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A steel-concrete composite column reinforcement device, characterized in that: include: The reinforcing cage is coaxially fitted outside the original steel-concrete composite column; Multiple positioning collars are spaced apart along the length of the original steel-concrete composite column; each positioning collar includes an inner ring plate and an outer ring plate that are coaxially fixed together, the inner ring plate being coaxially sleeved on the original steel-concrete composite column, and the outer ring plate being located outside the reinforcing cage. Multiple outer steel pipes are coaxially sleeved around the reinforcing cage; each outer steel pipe is connected between two adjacent outer ring plates; The limiting component is detachably connected to the positioning collar to maintain a stable distance between the reinforcing cage and the inner ring plate, and between the reinforcing cage and the outer ring plate. Concrete was poured between the original steel-concrete composite column and the outer steel pipe.

2. The steel-concrete composite column reinforcement device according to claim 1, characterized in that: A plurality of radially arranged connecting plates are fixedly connected between the inner ring plate and the outer ring plate.

3. The steel-concrete composite column reinforcement device according to claim 2, characterized in that: The limiting member includes at least two limiting parts and a connecting part fixed between two adjacent limiting parts; one side of the limiting part is provided with a limiting protrusion that abuts against the outer side of the inner ring plate, and the other side of the limiting part is provided with a limiting groove that is adapted to the vertical reinforcing bars of the reinforcing cage.

4. The steel-concrete composite column reinforcement device according to claim 3, characterized in that: The limiting protrusion and the limiting groove are positioned correspondingly, and both are located on the same radial line of the positioning collar.

5. The steel-concrete composite column reinforcement device according to claim 4, characterized in that: The lower end face of the connecting part is provided with a snap-fit ​​groove that is adapted to be inserted into the connecting plate, and the extension direction of the snap-fit ​​groove is parallel to the axial direction of the positioning collar.

6. The steel-concrete composite column reinforcement device according to claim 5, characterized in that: The connecting part is arc-shaped, so that the multiple limiting parts are distributed along the circumference of the inner ring plate.

7. The steel-concrete composite column reinforcement device according to claim 6, characterized in that: Each of the positioning collars is provided with a plurality of limiting members, which are evenly distributed along the circumference of the positioning collar.

8. The steel-concrete composite column reinforcement device according to claim 1, characterized in that: A nut is fixed to the outer side of the inner ring plate, and a bolt is threaded onto the nut. The bolt passes through the inner ring plate radially, and the end of the bolt abuts against the original steel-concrete column.

9. The steel-concrete composite column reinforcement device according to claim 1, characterized in that: Both the upper and lower ends of the outer ring plate are provided with insertion grooves for the ends of the outer steel pipe to be inserted.

10. A steel-concrete composite column reinforcement device according to claim 9, characterized in that: The outer steel pipe includes multiple interlocking arc-shaped plates with splicing seams between them, and the splicing seams of two adjacent outer steel pipes are staggered.

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