Fiber-reinforced steel pipe concrete column structure and construction method thereof

Abstract

The application relates to the technical field of civil engineering, in particular to a fiber-reinforced steel pipe concrete column structure and a construction method thereof, which comprises a steel pipe, a plurality of net cage assemblies are arranged in the steel pipe, and a stone is arranged in each net cage assembly; gaps are respectively left between the steel pipe and the net cage assemblies and between the net cage assemblies and the stones, and concrete is poured in the gaps; the net cage assembly comprises a fiber net, a plurality of connecting parts are arranged on the outer wall of the fiber net, the connecting parts are detachably connected with limiting plates, and the limiting plates are fixedly connected with the inner wall of the steel pipe; a limiting part is arranged at the bottom of the fiber net and detachably connected with the bottom of the stone; the inner diameter of the fiber net is larger than the outer diameter of the stone, and the inner diameter of the fiber net is larger than the outer diameter of the stone. The application can reuse the waste stone through secondary processing, reduces the manufacturing cost and avoids resource waste, and can effectively improve the impermeability, anti-crushing and impact resistance of the concrete through the net cage assembly, and enhance the toughness and wear resistance of the concrete.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of civil engineering, in particular to a fiber-reinforced steel pipe concrete column structure and a construction method thereof. BACKGROUND

[0002] The compressive strength of concrete is high, but the bending resistance is weak, while the bending resistance of steel, especially shaped steel, is strong, and it has good elastic-plasticity, but it is easy to lose stability and lose axial compressive capacity when under pressure. Steel pipe concrete can combine the advantages of both in structure, so that the compressive strength of concrete can be significantly improved. At the same time, the presence of concrete improves the stiffness of the steel pipe, and both work together to greatly improve the carrying capacity. Steel pipe concrete, as a new type of composite structure, is mainly used for axial compression and small eccentric compression components, and is widely used in frame structures (such as factory buildings and high-rise buildings). The rapid development of steel pipe concrete structure is due to its good stress performance and construction performance.

[0003] Steel pipe concrete composite column is a common component form in steel concrete composite structure. It is widely used in the field of building structure and bridge field due to its good compression performance and deformation performance. The axial compression strength of steel pipe concrete composite column is mainly provided by the confined concrete and the external steel pipe. For ordinary steel pipe concrete composite column, the compressive capacity and carrying capacity provided by the concrete are usually insufficient to meet the needs of high-strength structures, affecting the performance of the structure.

[0004] In addition, in many areas of China, especially in southeast coastal areas such as Fujian, granite reserves are abundant, and the stone processing industry is developed. There are many standard stones generated by the replacement of existing stone structures. The waste stone materials from the demolished stone structures can be fully utilized in steel pipe concrete composite column structures, which not only solves the problem of insufficient axial compression strength and carrying capacity, but also greatly reduces the amount of concrete used in new structures, reduces costs, and reduces environmental pollution. It is a technology that meets the needs of social green and sustainable development.

[0005] Therefore, there is an urgent need for a fiber-reinforced steel pipe concrete column structure and a construction method thereof, which can effectively utilize waste stone materials, reduce the amount of concrete, and reduce environmental pollution. SUMMARY

[0006] The purpose of the present application is to provide a fiber-reinforced steel pipe concrete column structure and a construction method thereof to solve the problems existing in the prior art.

[0007] In order to achieve the above object, the present application provides the following scheme: a fiber-reinforced steel pipe concrete column structure, comprising a steel pipe, a plurality of cage assemblies are arranged in the steel pipe, and each cage assembly is arranged with a stone material; gaps are respectively left between the steel pipe and the cage assemblies and between the cage assemblies and the stone materials, and concrete is poured in the gaps;

[0008] The cage assembly comprises a fiber mesh, a plurality of connecting parts are arranged on the outer wall of the fiber mesh, the connecting parts are detachably connected with limiting plates, and the limiting plates are fixedly connected with the inner wall of the steel pipe; a limiting part is arranged at the bottom of the fiber mesh, and the limiting part is detachably connected with the bottom of the stone material;

[0009] The inner diameter of the steel pipe is greater than the outer diameter of the fiber mesh, and the inner diameter of the fiber mesh is greater than the outer diameter of the stone material.

[0010] Preferably, the plurality of connecting parts are equidistantly arranged on the outer wall of the fiber mesh.

[0011] Preferably, the connecting part comprises a sliding bar, both ends of the sliding bar are fixedly connected with connecting rods, and one end of the connecting rod away from the sliding bar is fixedly connected with the outer wall of the fiber mesh.

[0012] Preferably, the length of the sliding bar is the same as that of the fiber mesh.

[0013] Preferably, a sliding groove is formed in the side of the limiting plate facing the fiber mesh, a limiting groove is formed in the side wall of the sliding groove, and a limiting strip is detachably connected in the sliding groove.

[0014] Preferably, the sliding groove and the sliding bar are one-to-one corresponding, a limiting block is fixedly connected on the sliding bar, and the limiting block is detachably connected with the limiting groove.

[0015] Preferably, a positioning strip is fixedly connected on the limiting strip, a positioning groove is slidingly connected with the positioning strip, and the positioning groove is formed in the side wall of the sliding groove.

[0016] Preferably, the limiting part comprises two reinforcing bars, both ends of the reinforcing bars are fixedly connected with the inner wall of the fiber mesh, and the two reinforcing bars are arranged in an up-and-down staggered and perpendicular manner.

[0017] Preferably, a cross groove is formed in the bottom of the stone material, and the two reinforcing bars are arranged in the cross groove.

[0018] A construction method of a fiber-reinforced steel pipe concrete column structure, comprising the following steps:

[0019] S1. Steel pipes are made according to the required length;

[0020] S2. Stone materials are made by using waste stone materials;

[0021] S3. Making the cage assembly according to the length of the stone;

[0022] S4. Welding the limiting plate in the steel pipe;

[0023] S5. Installing a cage assembly in the steel pipe first, and then placing the stone in the cage assembly;

[0024] S6. Repeating step S5, and placing all the cage assemblies and stones in the steel pipe according to requirements;

[0025] S7. Pouring concrete into the steel pipe.

[0026] The present application discloses the following technical effects:

[0027] 1. The present application can be used according to the building characteristics of Fujian region, and the abundant granite reserves and developed stone building market in Fujian region are the industrial guarantee of the present technology; there are a large number of demolished stone structure buildings in the south of Fujian, and a large amount of waste stone is produced during the demolition process, which can be reused without complex secondary processing, thereby reducing the production cost, avoiding resource waste, and being conducive to the sustainable development of society.

[0028] 2. The present application uses large block stone with regular shape to replace most of the concrete inside the steel pipe, and since the strength-to-mass ratio of stone is much higher than that of concrete and ordinary steel, the compressive strength of the column can be greatly improved without changing the size of the cross section; in addition, the brittle failure characteristics of stone can be improved by the restraining action of the steel pipe and the cage assembly, thereby effectively improving the carrying capacity of the stone.

[0029] 3. The present application can effectively utilize the waste stone in the demolished stone structure building in the steel pipe concrete composite column structure, which not only solves the problems of insufficient axial compressive strength and carrying capacity, but also greatly reduces the amount of concrete used in new structures; since stone is different from concrete, stone does not need to be fired, which not only effectively reduces the cost, but also effectively reduces the pollution to the environment.

[0030] 4. The present application can effectively improve the impermeability, anti-crushing and impact resistance of concrete through the cage assembly, thereby enhancing the toughness and wear resistance of concrete, greatly prolonging the service life of concrete, greatly reducing the engineering maintenance cost; and effectively improving the overall carrying capacity of the steel pipe concrete column, thereby effectively prolonging the overall service life of the steel pipe concrete column. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below only illustrate some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0032] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0033] Figure 2 It is a schematic diagram of the limiting plate structure of the present application.

[0034] Figure 3 It is a schematic diagram of the cross-sectional structure of the limiting plate of the present application.

[0035] Figure 4 It is a schematic diagram of the limiting strip structure of the present application.

[0036] Figure 5 It is a schematic diagram of the net cage assembly structure of the present application.

[0037] Figure 6 It is a schematic diagram of the fiber net bottom view structure of the present application.

[0038] Figure 7 It is a schematic diagram of the stone material bottom view structure of the present application.

[0039] Wherein, 1, steel pipe; 2, fiber net; 3, stone material; 11, sliding groove; 12, limiting groove; 13, limiting strip; 14, limiting plate; 15, positioning strip; 16, positioning groove; 21, connecting rod; 22, sliding strip; 23, reinforcing bar; 24, limiting block; 31, cross groove. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0041] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0042] Reference Figures 1-7 The present application provides a fiber-reinforced steel pipe concrete column structure, which comprises a steel pipe 1, a plurality of net cage assemblies arranged in the steel pipe 1, and a stone material 3 arranged in each net cage assembly. Gaps are respectively left between the steel pipe 1 and the net cage assemblies and between the net cage assemblies and the stone materials 3, and concrete is poured in the gaps.

[0043] The net cage assembly comprises a fiber net 2, a plurality of connecting parts are arranged on the outer wall of the fiber net 2, the connecting parts are detachably connected with a limiting plate 14, the limiting plate 14 is fixedly connected with the inner wall of the steel pipe 1; a limiting part is arranged at the bottom of the fiber net 2, and the limiting part is detachably connected with the bottom of the stone 3.

[0044] The inner diameter of the steel pipe 1 is greater than the outer diameter of the fiber net 2, and the inner diameter of the fiber net 2 is greater than the outer diameter of the stone 3. The fiber net 2 can be arranged between the steel pipe 1 and the stone 3, and the overall strength of the concrete can be effectively improved through the fiber net 2.

[0045] The diameter-thickness ratio d / t of the steel pipe 1 is in the range of 40-55, the diameter d is the outer diameter of the steel pipe 1, and the t is the wall thickness of the steel pipe 1.

[0046] The stone compressive strength of the stone 3 is in the range of 105-110 MPa, and the tensile strength is in the range of 6-10 MPa; preferably, the stone compressive strength is about 108 MPa, and the tensile strength is about 8 MPa.

[0047] The cross section of the steel pipe 1, the fiber net 2 and the stone 3 can be simply processed into a circular cross section or a rectangular cross section according to the shape of the waste stone.

[0048] When the stone 3 is simply processed into a rectangle or a square, the fiber net 2 corresponds to a rectangle or a square, the fiber net 2 is used in adaptation with the stone 3, and the steel pipe 1 can be circular, rectangular or square according to the actual use.

[0049] The present application can be used according to the building characteristics of Fujian region, and the abundant granite reserves and developed stone building market in Fujian region are the industrial guarantee of the present technology; there are a large number of demolished stone structure buildings in Minnan region, a large amount of waste stone is produced during the demolition process, which can be reused without complex secondary processing, which reduces the production cost and avoids resource waste, and is conducive to the sustainable development of the society.

[0050] The present application uses large block stone with regular shape to replace most of the concrete inside the steel pipe 1, and the strength-to-mass ratio of the stone is much higher than that of the concrete and ordinary steel, so that the compressive strength of the steel pipe concrete column can be greatly improved without changing the cross section size; in addition, the brittle failure characteristics of the stone can be improved by the constraint action of the steel pipe 1 and the net cage assembly, and the carrying capacity and service life of the stone are effectively improved.

[0051] The application can effectively utilize the waste stone materials in the demolished stone structure building in the steel pipe concrete composite column structure, can solve the problems of insufficient axial compression strength and bearing capacity, can greatly reduce the concrete consumption of the newly-built structure, and can effectively reduce the cost and pollution to the environment due to the difference between the stone materials and the concrete.

[0052] The net cage assembly can effectively improve the anti-permeability, anti-crushing and anti-impact performance of the concrete, enhance the toughness and wear resistance of the concrete, thereby greatly prolonging the service life of the concrete and greatly reducing the engineering maintenance cost, and effectively improve the overall bearing capacity of the steel pipe concrete column, thereby effectively prolonging the overall service life of the steel pipe concrete column.

[0053] In a further optimization scheme, a plurality of connecting portions are arranged at equal intervals on the outer wall of the fiber net 2. The fiber net 2 can be effectively expanded by the plurality of connecting portions, and the central axis of the fiber net 2 and the central axis of the steel pipe 1 are on the same central axis.

[0054] In a further optimization scheme, the connecting portion includes a sliding strip 22, both ends of the sliding strip 22 are fixedly connected with connecting rods 21, and one end of the connecting rod 21 away from the sliding strip 22 is fixedly connected with the outer wall of the fiber net 2. The connecting rod 21 arranged above and below can effectively support both ends of the fiber net 2, so that the fiber net 2 is stably expanded in the steel pipe 1.

[0055] In a further optimization scheme, the length of the sliding strip 22 is the same as that of the fiber net 2. The connecting rod 21 at both ends of the sliding strip 22 can effectively expand the end of the fiber net 2, so that the stone material 3 can be effectively installed in the fiber net 2.

[0056] In a further optimization scheme, the side of the limiting plate 14 facing the fiber net 2 is provided with a sliding groove 11, a limiting groove 12 is formed in the side wall of the sliding groove 11, and a limiting strip 13 is detachably connected in the sliding groove 11. The limiting strip 13 installed in the sliding groove 11 can limit the sliding strip 22, so that the sliding strip 22 can be stably in the sliding groove 11.

[0057] In a further optimization scheme, the sliding groove 11 and the sliding strip 22 are one-to-one corresponding, the sliding strip 22 is fixedly connected with a limiting block 24, and the limiting block 24 is detachably connected with the limiting groove 12. When the limiting block 24 is inserted into the limiting groove 12, the sliding strip 22 can be stably in the sliding groove 11.

[0058] Further optimization scheme, the limiting strip 13 is fixedly connected with a limiting strip 15, the limiting strip 15 is slidably connected with a limiting groove 16, and the limiting groove 16 is formed in the side wall of the sliding groove 11. The limiting groove 16 is formed in the side wall of the sliding groove 11 opposite to the limiting groove 12. The limiting strip 13 can stably move in the sliding groove 11, and the sliding strip 22 is limited, so that the limiting block 24 is prevented from being separated from the limiting groove 12, and the limiting block 24 can stably be in the limiting groove 12.

[0059] Further optimization scheme, the limiting part includes two reinforcing bars 23, the two ends of the reinforcing bars 23 are fixedly connected with the inner wall of the fiber net 2, and the two reinforcing bars 23 are arranged in an upper and lower staggered and perpendicular manner. The two reinforcing bars 23 can effectively support the bottom end of the fiber net 2.

[0060] Further optimization scheme, the bottom of the stone material 3 is provided with a cross groove 31, and the two reinforcing bars 23 are arranged in the cross groove 31. By pouring concrete, the reinforcing bars 23 can be integrally poured with the stone material 3, effectively improving the overall strength of the stone material 3.

[0061] The central axis of the cross groove 31 is on the same axis as the central axis of the stone material 3.

[0062] The cross groove 31 formed in the bottom of the stone material 3 can make the central axis of the stone material 3 and the central axis of the steel pipe 1 on the same central axis.

[0063] The two reinforcing bars 23 arranged in an upper and lower staggered and perpendicular manner not only can provide effective support for the fiber net 2, but also can stably be in the cross groove 31, and the reinforcing bars 23 and the stone material 3 can be effectively integrated by concrete.

[0064] In order to make the central axis of the stone material 3 and the central axis of the steel pipe 1 on the same central axis, when the stone material 3 is in the fiber net 2, the two reinforcing bars 23 are in the cross groove 31 by rotating the stone material 3, at this time, the central axis of the stone material 3 and the central axis of the steel pipe 1 are on the same central axis.

[0065] A construction method of a fiber-reinforced steel pipe concrete column structure, comprising the following steps:

[0066] S1. Steel pipe 1 is made according to the required length; the steel pipe 1 is made according to the diameter-thickness ratio d / t of 40-55.

[0067] S2. The waste stone material is used to make the stone material 3; the stone material 3 is made by simply processing the waste stone material in the demolished stone structure building. According to the cross-sectional shape of the waste stone material, the existing shape of the waste stone material can be simply processed into a circular cross-section or a rectangular cross-section, which reduces the production cost and avoids pollution and waste.

[0068] S3. According to the length of the stone 3, the net cage assembly is made; each net cage assembly can place a stone 3.

[0069] S4. The limiting plate 14 is welded in the steel pipe 1; first, the sliding groove 11 is opened on the limiting plate 14, the width of the sliding groove 11 is the sum of the width of the sliding bar 22 and the limiting block 24, and the width of the limiting block 24 is equal to the width of the limiting strip 13; the limiting strip 13 can be made of waste stone; then the steel pipe 1 is fixed on the construction foundation.

[0070] S5. First, install a net cage assembly in the steel pipe 1, first install the sliding bar 22 and the limiting block 24 in the sliding groove 11, align the limiting block 24 with the limiting groove 12, then push the limiting block 24 into the limiting groove 12, then insert the positioning strip 15 into the positioning groove 16, push down the limiting strip 13, make the limiting strip 13 in the sliding groove 11, limit the sliding bar 22, avoid the limiting block 24 from the limiting groove 12, make the limiting block 24 stably in the limiting groove 12, make a fiber net 2 stably in the steel pipe 1, facilitate the installation and positioning of the stone 3;

[0071] Then place the stone 3 in the net cage assembly; place the stone 3 in the fiber net 2, rotate the stone 3 to make the two reinforcing bars 23 in the cross groove 31 at the bottom of the stone 3.

[0072] S6. Repeat step S5, according to the requirements, place all the remaining net cage assemblies and stones 3 into the steel pipe 1;

[0073] S7. Pour concrete into the steel pipe 1; stop pouring concrete when the top surface of the concrete is flush with the top surface of the steel pipe 1, at this time, the poured concrete can flow into the cross groove 31, and through the concrete, the steel pipe 1, the fiber net 2, the stone 3, the limiting strip 13, the connecting rod 21, the sliding bar 22 and the reinforcing bar 23 become a whole.

[0074] Working process: first, according to the required length of the steel pipe 1, the diameter thickness ratio d / t of the steel pipe 1 is 40~55, the steel pipe 1 is made; then the waste stone 3 is made of waste stone, the existing shape of the waste stone can be simply processed into a circular cross section or a rectangular cross section, which effectively reduces the production cost and avoids resource waste, the length installation requirement of the stone 3 is determined, since the stone 3 is made of waste stone in the demolished stone structure building and is simply processed, not only the production cost is effectively reduced, but also the building waste pollution and waste are avoided, the invention can be used according to the building characteristics of Fujian area, the rich granite reserves in Fujian area and the developed stone building market are the industrial guarantee of the technology; there are a large number of demolished stone structure buildings in Minnan area, a large amount of waste stone is produced in the demolition process, which can be reused without complex secondary processing, which not only reduces the production cost but also avoids resource waste, which is conducive to the sustainable development of social economy.

[0075] Then the net cage assembly is made according to the length of the stone 3; each net cage assembly can place a stone 3, and the length of a plurality of stones 3 connected in sequence is matched with the total length of the steel pipe 1; then the limiting plate 14 is grooved; first, the sliding groove 11 is opened, the width of the sliding groove 11 is the sum of the width of the sliding strip 22 and the limiting block 24, and the width of the limiting block 24 is equal to the width of the limiting strip 13; the limiting strip 13 can be made of waste stone; then a plurality of limiting plates 14 are welded on the inner wall of the steel pipe 1 at equal intervals, and the steel pipe 1 is fixed on the construction foundation; when the steel pipe 1 can be stably placed on the foundation, first, a net cage assembly is installed in the steel pipe 1, and the sliding strip 22 and the limiting block 24 are installed in the sliding groove 11, so that the limiting block 24 is aligned with the limiting groove 12, then the limiting block 24 is pushed into the limiting groove 12, then the positioning strip 15 is inserted into the positioning groove 16, the limiting strip 13 is pushed down, so that the limiting strip 13 is in the sliding groove 11, the sliding strip 22 is limited, the limiting block 24 is prevented from separating from the limiting groove 12, the limiting block 24 can be stably placed in the limiting groove 12, the fiber net 2 can be stably placed in the steel pipe 1, and the connecting rod 21 can effectively support the two ends of the fiber net 2, so that the fiber net 2 is stably expanded in the steel pipe 1, and the center axis of the fiber net 2 and the center axis of the steel pipe 1 are on the same center axis.

[0076] Then place the stone 3 into the fiber mesh 2, and by rotating the stone 3, the two reinforcement bars 23 can be placed in the cross groove 31 at the bottom of the stone 3, and the cross groove 31 opened at the bottom of the stone 3 can make the central axis of the stone 3 and the central axis of the steel pipe 1 on the same central axis; the present invention uses the connecting rods 21 arranged up and down to enable the connecting rods 21 to effectively support the two ends of the fiber mesh 2, so that the fiber mesh 2 is stably stretched in the steel pipe 1, and at the same time, it can also make the central axis of the fiber mesh 2 and the central axis of the steel pipe 1 on the same central axis, and through the cross groove 31 opened at the bottom of the stone 3, the central axis of the stone 3 and the central axis of the steel pipe 1 on the same central axis, so that the central axes of the steel pipe 1, fiber mesh 2, and stone 3 are all on the same central axis, so that the force can be evenly distributed, and the steel pipe 1, fiber mesh 2, and stone 3 can bear the load together, effectively improving the overall bearing capacity, and making the force evenly distributed; continue to install all the remaining cage components and stones 3 into the steel pipe 1.

[0077] Then pour concrete and vibrate continuously until the concrete is about to overflow the upper surface of the stone 3, and stop pouring the concrete. At this time, the poured concrete flows into the cross groove 31, and the steel pipe 1, fiber mesh 2, stone 3, limit strip 13, connecting rod 21, slide bar 22, and reinforcement 23 can be integrated into a whole through the concrete. The present invention uses large blocks of stone with regular shapes to replace most of the concrete inside the steel pipe 1. Since the ratio of stone strength to mass is much higher than that of concrete and ordinary steel, the compressive strength of the steel tube concrete column can be greatly improved without changing the cross-sectional size. ; In addition, the brittle failure property of stone can be improved by the restraining effect of the steel pipe 1 and the mesh cage assembly, which effectively improves the bearing capacity and service life of the stone; the present invention can effectively make full use of the discarded stones in the demolished stone structure buildings in the steel tube concrete composite column structure, which can not only solve the problems of insufficient axial compression strength and bearing capacity, but also greatly reduce the amount of concrete used in the new structure. Since stone is different from concrete, stone does not require a firing process, which can not only effectively reduce costs and avoid waste of resources, but also effectively reduce the pollution of construction waste to the environment.

[0078] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0079] The above described embodiments are only to illustrate the preferred modes of the present application, and are not intended to limit the scope of the present application. Any modification and improvement made by those skilled in the art to the technical solutions of the present application without departing from the design spirit of the present application shall fall within the protection scope of the present application as defined by the claims.

Claims

1. A fiber-reinforced concrete-filled steel tube column structure, characterized in that: The invention comprises a steel pipe (1), wherein a plurality of mesh cage assemblies are arranged in the steel pipe (1), and a stone (3) is arranged in each mesh cage assembly; a gap is respectively left between the steel pipe (1) and the mesh cage assembly, and between the mesh cage assembly and the stone (3), and concrete is poured in the gap; The mesh cage assembly comprises a fiber mesh (2), wherein a plurality of connecting portions are provided on the outer wall of the fiber mesh (2), wherein the connecting portions are detachably connected to a limiting plate (14), and the limiting plate (14) is fixedly connected to the inner wall of the steel pipe (1); a limiting portion is provided at the bottom of the fiber mesh (2), and the limiting portion is detachably connected to the bottom of the stone (3); The inner diameter of the steel pipe (1) is larger than the outer diameter of the fiber mesh (2), and the inner diameter of the fiber mesh (2) is larger than the outer diameter of the stone (3); The connecting portion comprises a slide bar (22), both ends of the slide bar (22) are fixedly connected to connecting rods (21), and one end of the connecting rod (21) away from the slide bar (22) is fixedly connected to the outer wall of the fiber mesh (2); The limiting portion comprises two reinforcement bars (23), both ends of the reinforcement bars (23) are fixedly connected to the inner wall of the fiber mesh (2), and the two reinforcement bars (23) are staggered up and down and arranged perpendicular to each other; A cross groove (31) is provided at the bottom of the stone (3), and the two reinforcement bars (23) are arranged in the cross groove (31).

2. The fiber-reinforced concrete-filled steel tube column structure according to claim 1, characterized in that: A plurality of the connecting portions are arranged at equal intervals on the outer wall of the fiber mesh (2).

3. The fiber-reinforced concrete-filled steel tube column structure according to claim 1, characterized in that: The sliding strip (22) has the same length as the fiber web (2).

4. The fiber-reinforced concrete-filled steel tube column structure according to claim 1, characterized in that: A sliding groove (11) is provided on a side of the limiting plate (14) facing the fiber mesh (2), a limiting groove (12) is provided on a side wall of the sliding groove (11), and a limiting strip (13) is detachably connected to the sliding groove (11).

5. The fiber-reinforced concrete-filled steel tube column structure according to claim 4, characterized in that: The slide groove (11) and the slide bar (22) are arranged in a one-to-one correspondence, a limiting block (24) is fixedly connected to the slide bar (22), and the limiting block (24) is detachably connected to the limiting groove (12).

6. The fiber-reinforced concrete-filled steel tube column structure according to claim 4, characterized in that: The limiting strip (13) is fixedly connected to a positioning strip (15), and the positioning strip (15) is slidably connected to a positioning groove (16), and the positioning groove (16) is provided on the side wall of the sliding groove (11).

7. A construction method for a fiber-reinforced concrete-filled steel tube column structure, based on the fiber-reinforced concrete-filled steel tube column structure according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Make a steel pipe (1) according to the required length; S2. Making stone from discarded stone (3); S3. Make a mesh cage assembly according to the length of the stone (3); S4. Weld the limit plate (14) into the steel pipe (1); S5. First, install a mesh cage assembly into the steel pipe (1), and then place the stone (3) into the mesh cage assembly; S6. Repeat step S5 and place all mesh cage components and stones (3) into the steel pipe (1) as required; S7. Pour concrete into the steel pipe (1).

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