Anti-seismic cage formwork reinforced concrete column structure

Abstract

The utility model relates to the technical field of building construction, in particular to an anti-seismic cage formwork reinforced concrete column structure, which comprises a cylindrical three-dimensional reinforcement cage, and is characterized in that the cylindrical three-dimensional reinforcement cage is formed by welding a plurality of layers of spiral stirrups and longitudinal main reinforcements, and an annular interface sleeve piece is arranged in the middle of a cylindrical three-dimensional reinforcement cage body; the bottom of the cylindrical three-dimensional reinforcement cage extends to form anchoring structures distributed in a radial mode, longitudinal connecting steel bars are arranged on the top of the cylindrical three-dimensional reinforcement cage, the reinforcement cage is integrally welded to enhance the rigidity, the rubber sealing ring in the middle absorbs earthquake energy, and the inclined anchor bars at the bottom prevent a column body from being disengaged. The modular design realizes quick assembly through bolt connection, and the construction is simplified by standardized connection steel bars at the top. The epoxy resin anticorrosive coating and the sealing interface ensure durability, and are especially suitable for severe environments. The multi-path force transmission design and the flexible connection mode provide safety redundancy, and the structural stability and adaptability are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to an earthquake-resistant cage-type reinforced concrete column structure. Background Technology

[0002] In the field of building structural engineering, reinforced concrete columns, as primary load-bearing components, directly affect the safety, durability, and construction efficiency of buildings. However, traditional reinforced concrete column structures have revealed numerous technical problems that urgently need to be addressed in practical applications. Specifically, regarding seismic performance, the poor overall integrity of the reinforcing cage formed using ordinary binding methods makes it prone to issues such as stirrup loosening and concrete cover spalling during earthquakes, ultimately leading to brittle failure of the column. In terms of construction efficiency, a large amount of on-site rebar binding and welding work is required, especially in high-rise buildings, where segmented connection of the column is difficult, easily causing misalignment and strength loss at the connection points. Regarding anchorage reliability, traditional column bottom anchor bars often use straight bars or simple hooks, which are easily pulled out under seismic loads, potentially leading to continuous collapse of the entire structure. Furthermore, in terms of durability, problems such as rebar corrosion and water seepage at connection points significantly accelerate the aging process of the structure, thus affecting its long-term seismic performance and service life. These problems severely restrict the application of reinforced concrete columns in important building structures.

[0003] Chinese patent discloses a precast reinforced concrete column cage formwork that does not require dismantling (publication number: CN217501040 U), which includes a mold shell, a reinforcing cage, and a sliding sleeve. The mold shell is a precast concrete casting component. The inner wall of the mold shell has slots. The outer side of the reinforcing cage is provided with stirrup ends. The sliding sleeve includes a sleeve shell with a sleeve hole inside. Rollers are provided on the outer side of the sleeve shell, and adjusting screws are inserted into the inner wall of the sleeve hole. However, this type of reinforced concrete column structure has core defects such as poor seismic performance, low construction efficiency, unreliable anchoring, and insufficient durability, which seriously affect the safety and service life of buildings. Therefore, a seismic-resistant cage formwork reinforced concrete column structure is needed. Utility Model Content

[0004] The purpose of this utility model is to address the core defects of existing reinforced concrete column structures, such as poor seismic performance, low construction efficiency, unreliable anchoring, and insufficient durability, which seriously affect the safety and service life of buildings. Therefore, this utility model proposes a seismic-resistant cage-type reinforced concrete column structure.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A seismic-resistant cage-type reinforced concrete column structure, comprising a cylindrical three-dimensional steel cage, characterized in that: the cylindrical three-dimensional steel cage is constructed by welding multiple layers of spiral stirrups and longitudinal main reinforcement bars; a ring-shaped interface sleeve is provided in the middle of the cylindrical three-dimensional steel cage column; a radially distributed anchoring structure extends from the bottom of the cylindrical three-dimensional steel cage; and longitudinal connecting reinforcement bars are provided at the top of the cylindrical three-dimensional steel cage, with the length of the longitudinal connecting reinforcement bars being ≥300mm. It features strong integrity: the welded steel cage is more stable and has better seismic performance than traditional tied structures; modular construction: the ring-shaped interface sleeve in the middle allows the column to be prefabricated in sections and quickly assembled on-site, improving construction efficiency; reliable anchoring: the radial anchor bars at the bottom effectively disperse stress, preventing the column bottom from detaching or cracking during earthquakes; convenient connection: long connecting reinforcement bars are reserved at the top, facilitating reliable connection with beams, slabs, and other structures, reducing construction errors.

[0006] Preferably, the annular interface sleeve is made of gray cast iron, with its inner diameter matching the distribution circle of the longitudinal main ribs. The annular interface sleeve includes an upper connecting pipe and a lower connecting pipe, and the outer wall of the lower connecting pipe is provided with bolt holes for modular connection. The gray cast iron sleeve has high rigidity, ensuring precise alignment of the upper and lower columns and avoiding eccentric stress; the bolt hole design allows adjacent columns to be quickly locked, reducing on-site welding and improving construction speed; the split design allows for a certain degree of deformation, avoiding brittle failure caused by rigid connection.

[0007] Preferably, the anchoring structure includes 6 to 8 anchor bars radially distributed at 45°, with a length ≥500mm, and the anchor bars have through holes on their surfaces. The obliquely radial anchor bars can effectively resist the upward pull-out force during earthquakes and prevent the column from detaching; the through holes on the surface of the anchor bars create a "locking" effect after the concrete is poured in, improving the reliability of the anchoring; the even distribution of multiple anchor bars avoids local stress concentration that could lead to concrete cracking.

[0008] Preferably, the mating surfaces of the upper and lower connecting pipes are provided with rubber sealing rings, the rubber sealing rings having a Shore hardness of 60-70. The rubber sealing rings can absorb minor displacements during earthquakes, reducing damage caused by rigid impacts; the sealing design prevents the infiltration of moisture and corrosive media, extending the lifespan of the casing; the elasticity of rubber allows for a certain degree of installation deviation, reducing construction difficulty.

[0009] Preferably, the longitudinal connecting steel bars are 10 to 12 in number and arranged in a circular array, and each longitudinal connecting steel bar is equipped with a binding ring wire. The evenly distributed circumferential connecting steel bars make the load distribution more balanced and avoid excessive stress on one side; the binding wire design makes on-site connection more flexible, reduces reliance on welding, and improves construction efficiency; multiple connecting steel bars form multiple force transmission paths, so even if individual steel bars fail, the structure can still maintain stability.

[0010] Preferably, the outer surface of the cylindrical three-dimensional steel cage is coated with an epoxy resin anti-corrosion layer with a thickness of ≥0.2mm. The epoxy resin layer can resist harsh environments such as humidity and salt spray, extending the structural life; the anti-corrosion layer reduces the risk of steel corrosion and reduces later repair costs; it is especially suitable for corrosive environments such as coastal areas and chemical industrial zones, ensuring long-term seismic performance.

[0011] The advantages of this utility model are:

[0012] This application and device achieve superior overall performance through multiple design features. Regarding seismic performance, the integrally welded steel cage exhibits higher rigidity compared to traditional tied structures, effectively restraining the concrete and preventing fragmentation and collapse during earthquakes. The rubber sealing ring interface in the middle absorbs seismic energy by allowing minor displacement, avoiding brittle failure caused by stress concentration. The radially arranged diagonal anchor bars at the bottom mechanically interlock with the concrete, effectively resisting seismic pull-out forces and preventing column detachment. In terms of construction efficiency, the design concept of segmented prefabrication and rapid assembly, along with the bolted connection of the ring-shaped interface sleeve fittings, achieves precise column alignment, significantly reducing on-site welding work and shortening the construction period. The evenly distributed longitudinal connecting steel bars at the top circumference, combined with the binding wire design, make the upper structure overlap more convenient, effectively reducing construction errors. Regarding durability, the epoxy resin anti-corrosion layer reliably isolates moisture and corrosive media, significantly extending the service life of the steel cage, making it particularly suitable for harsh environments such as coastal areas and chemical plants. The rubber sealing ring at the interface acts as a sealant, preventing moisture intrusion into the connection nodes and avoiding rust and freeze-thaw damage. In addition, the structure has a complete safety redundancy design: multiple connecting steel bars at the top and radial anchor bars at the bottom form a multi-path force transmission mechanism to ensure that the overall stability can be maintained even if there is a local failure; the gray cast iron sleeve fittings have both rigidity and toughness, which can ensure the centering accuracy and allow a certain amount of deformation to adapt to the foundation settlement, making the entire structural system more environmentally adaptable. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This utility model Figure 1 Enlarged view of I in the middle.

[0016] Figure 3This utility model Figure 1 Enlarged view of section II.

[0017] Figure 4 This utility model Figure 1 Enlarged view of section III.

[0018] In the diagram: 1. Longitudinal connecting steel bars; 2. Cylindrical three-dimensional steel cage; 3. Longitudinal main bars; 4. Multi-layer spiral stirrups; 5. Upper connecting pipe; 6. Lower connecting pipe; 7. Binding ring wire; 8. Rubber sealing ring; 9. Bolt holes; 10. Anchor bars; 11. Through holes. 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] Example

[0021] Please see Figure 1-4 As shown, a seismic-resistant cage-type reinforced concrete column structure includes a cylindrical three-dimensional steel cage 2. The cylindrical three-dimensional steel cage 2 is characterized by being constructed by welding multiple layers of spiral stirrups 4 and longitudinal main reinforcement 3. A ring-shaped interface sleeve is provided in the middle of the cylindrical three-dimensional steel cage 2. Radially distributed anchoring structures extend from the bottom of the cylindrical three-dimensional steel cage 2. Longitudinal connecting reinforcement 1 with a length ≥300mm is provided at the top of the cylindrical three-dimensional steel cage 2. The structure offers several advantages: strong integrity (the welded steel cage is more stable and has better seismic performance than traditional tied structures); modular construction (the ring-shaped interface sleeve in the middle allows for segmented prefabrication of the column, enabling rapid on-site assembly and improving construction efficiency); reliable anchoring (the radial anchor bars 10 at the bottom effectively disperse stress, preventing column bottom detachment or cracking during earthquakes); and convenient connection (long connecting reinforcement bars are reserved at the top for reliable connection with beams, slabs, and other structures, reducing construction errors).

[0022] In this embodiment, the annular interface sleeve is made of gray cast iron, and its inner diameter matches the distribution circle of the longitudinal main ribs 3. The annular interface sleeve includes an upper connecting pipe 5 and a lower connecting pipe 6. The outer wall of the lower connecting pipe 6 is provided with bolt holes 9 for modular connection. The gray cast iron sleeve has high rigidity, which can ensure precise alignment of the upper and lower columns and avoid eccentric force. The bolt hole 9 design allows adjacent columns to be quickly locked, reducing on-site welding and improving construction speed. The split design allows for a certain degree of deformation, avoiding brittle failure caused by rigid connection.

[0023] In this embodiment, the anchoring structure includes 6 to 8 anchor bars 10 radially distributed at 45°, with a length ≥500mm. The surface of each anchor bar 10 has through holes 11. The obliquely radial anchor bars 10 effectively resist upward pull-out forces during earthquakes, preventing the column from detaching. The through holes 11 on the surface of the anchor bars 10 create a "locking" effect after concrete is poured in, improving anchoring reliability. The even distribution of multiple anchor bars 10 avoids localized stress concentration that could lead to concrete cracking.

[0024] In this embodiment, a rubber sealing ring 8 is provided at the mating surface of the upper connecting pipe 5 and the lower connecting pipe 6. The rubber sealing ring 8 has a Shore hardness of 60-70. The rubber sealing ring 8 can absorb minor displacements during earthquakes and reduce damage caused by rigid impacts; the sealing design can prevent the infiltration of moisture and corrosive media, extending the service life of the sleeve fittings; the elasticity of rubber allows for a certain degree of installation deviation, reducing construction difficulty.

[0025] In this embodiment, the longitudinal connecting steel bars 1 are 10 to 12 in number and arranged in a circular array. Each longitudinal connecting steel bar 1 is equipped with a binding ring wire 7. The evenly distributed circumferential connecting steel bars make the load distribution more balanced and avoid excessive stress on one side; the binding wire design makes on-site connection more flexible, reduces reliance on welding, and improves construction efficiency; multiple connecting steel bars form multiple force transmission paths, so even if individual steel bars fail, the structure can still maintain stability.

[0026] In this embodiment, the outer surface of the cylindrical three-dimensional steel cage 2 is coated with an epoxy resin anti-corrosion layer with a thickness of ≥0.2mm. The epoxy resin layer can resist harsh environments such as humidity and salt spray, extending the structural life; the anti-corrosion layer reduces the risk of steel corrosion and reduces later repair costs; it is especially suitable for corrosive environments such as coastal areas and chemical industrial zones, ensuring long-term seismic performance.

[0027] The implementation principle of this embodiment is as follows:

[0028] The longitudinal main reinforcement 3 is evenly distributed along the column axis and bears the vertical load of the structure; the multi-layer spiral stirrups 4 tightly surround the main reinforcement in a continuous spiral form, effectively restraining the core concrete under seismic action and preventing it from brittle failure; the epoxy resin anti-corrosion layer coated on the surface of the steel cage forms a continuous protective film, which significantly improves the durability of the structure in corrosive environments.

[0029] Modular connection is achieved by using split-type ring-shaped interface sleeve fittings. The upper and lower connecting pipes 6 are precisely aligned and fixed in the preset hole positions by matching high-strength bolts. The rubber sealing ring 8 set at the interface has a specific hardness index, which can not only ensure the connection rigidity, but also absorb energy through elastic deformation during earthquakes, avoiding brittle failure of the joint.

[0030] The bottom is equipped with 6-8 anchor bars 10 arranged radially at 45°, and the through holes 11 on their surface form a mechanical interlock with the poured concrete. This structure converts the upward pull-out force into the compressive state of the concrete through oblique force conversion, which significantly improves the anchorage reliability and effectively resists the pull-out force under earthquake action.

[0031] Ten to twelve evenly distributed longitudinal connecting steel bars are installed at the top, with an extension length of ≥300mm. They are reliably connected to the upper structural steel bars by binding wire. This multi-connection system forms a spatial force network, ensuring the integrity of the structure under seismic action and avoiding connection failure.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A seismic cage form reinforced concrete column structure comprising a cylindrical three-dimensional steel reinforcement cage (2), characterized in that: The cylindrical three-dimensional reinforcement cage (2) is composed of multiple layers of spiral stirrups (4) and longitudinal main reinforcement (3) welded together, the cylindrical three-dimensional reinforcement cage (2) is provided with an annular interface sleeve in the middle of the cylinder, the cylindrical three-dimensional reinforcement cage (2) is provided with a radial distribution of anchoring structure at the bottom, the cylindrical three-dimensional reinforcement cage (2) is provided with a longitudinal connecting steel bar (1) at the top, the length of the longitudinal connecting steel bar (1) is greater than or equal to 300mm.

2. The anti-seismic cage form reinforced concrete column structure according to claim 1, characterized in that: The annular interface sleeve is made of gray cast iron, the inner diameter matches the distribution circle of the longitudinal main reinforcement (3), the annular interface sleeve includes an upper connecting pipe (5) and a lower connecting pipe (6), the outer wall of the lower connecting pipe (6) is provided with bolt holes (9) for modular connection.

3. The anti-seismic cage form reinforced concrete column structure according to claim 1, characterized in that: The anchoring structure includes 6-8 anchor bars (10) distributed at 45°, the length of the anchor bar (10) is greater than or equal to 500mm, and the surface of the anchor bar (10) is provided with a through hole (11).

4. The anti-seismic cage form reinforced concrete column structure according to claim 2, characterized in that: The butt joint surface of the upper connecting pipe (5) and the lower connecting pipe (6) is provided with a rubber sealing ring (8), the rubber sealing ring (8) has a Shore hardness of 60-70.

5. The anti-seismic cage form reinforced concrete column structure according to claim 1, characterized in that: The number of longitudinal connecting steel bars (1) is 10-12 and is arranged in a circumferential array, the longitudinal connecting steel bar (1) is provided with a binding annular iron wire (7).

6. The anti-seismic cage form reinforced concrete column structure according to claim 1, characterized in that: The outer surface of the cylindrical three-dimensional reinforcement cage (2) is coated with an epoxy resin anticorrosive layer with a thickness of greater than or equal to 0.2mm.

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