Square steel tube concrete composite column with internal filling stone and construction method

Abstract

This invention provides a square steel tube concrete composite column with internal filling stone and a construction method thereof, including a square steel tube, a concrete layer, and a column core assembly; the column core assembly is coaxially arranged inside the square steel tube, and the concrete layer fills the empty space inside the square steel tube; the column core assembly includes angle steel, stone columns, gusset plates, and limiting components, and also includes a positioning mechanism for positioning the array positions of the four angle steels to ensure the integrity and position of the column core. This composite column can significantly improve axial compressive bearing capacity and integrity, and has advantages such as high compressive strength and low cost. Moreover, the construction method is based on the architectural characteristics of Fujian Province, using locally sourced materials, making full use of the waste stone from demolished stone structures in the steel tube concrete composite column structure. This not only solves the problem of insufficient axial compressive strength and bearing capacity, but also greatly reduces the amount of concrete used in new structures, reducing costs and environmental pollution. It is a technology that meets the needs of green and sustainable development.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, and more specifically, to a square steel tube concrete composite column with internal filling stone and a construction method thereof. Background Technology

[0002] Currently, steel-concrete composite columns are a common type of component in steel-concrete composite structures. They are widely used in building structures and bridges due to their excellent compressive and deformation properties. The axial compressive strength of steel-concrete composite columns is mainly provided by the confined concrete and the external steel tube. For ordinary steel-concrete composite columns, the compressive strength and bearing capacity provided by the concrete are usually insufficient to support the requirements of high-strength structures, affecting the overall building structure.

[0003] Furthermore, many regions in my country, especially the southeastern coastal areas such as Fujian, have abundant granite reserves and a well-developed stone processing industry. This results in a large quantity of standard-sized stone blocks generated from the renovation and replacement of existing stone structures. Utilizing the waste stone from demolished stone structures in steel-concrete composite column structures can not only solve the problems of insufficient axial compressive strength and load-bearing capacity, but also significantly reduce the amount of concrete used in new structures, lowering costs and reducing environmental pollution. This technology aligns with the needs of green and sustainable social development. Summary of the Invention

[0004] This invention provides a square steel tube concrete composite column with internal filling stone and a construction method thereof, aiming to improve the shortcomings of the prior art. Based on the architectural characteristics of Fujian region, it uses locally sourced materials and solves the problems of insufficient strength and bearing capacity, and high cost of steel tube concrete composite columns in the background art.

[0005] To address the aforementioned technical problems, this invention provides a square steel tube concrete composite column with internal filling stone, comprising a square steel tube, a concrete layer, and a column core assembly. The column core assembly is coaxially arranged inside the square steel tube, and the concrete layer fills the empty space inside the square steel tube. The column core assembly includes four angle steels, four stone columns, four sets of connecting plates, and at least two sets of limiting components. The four angle steels are arranged in an equilateral rectangular array, with one end of the right-angled groove of each angle steel facing inward. The four sets of connecting plates are respectively connected between the outer ends of adjacent angle steels. The four stone columns are respectively arranged at the inner ends of the four angle steels. The side end faces of the angle steels are flush with the side faces of the stone columns. The limiting components have a grid-like structure and are arranged between the four stone columns, abutting against the two inner sides of each stone column. A positioning mechanism is also included, located below the column core assembly, for positioning the array position of the four angle steels.

[0006] As a further optimization, the positioning mechanism includes a base, on which four sliding rods are evenly spaced around the circumference of the base. A positioning seat is slidably mounted on each sliding rod, and a positioning part is provided on each positioning seat. The inner end of the positioning part is adapted to fit against the outer end of the angle steel. A telescopic rod is connected between adjacent positioning seats.

[0007] As a further optimization, the positioning seat is provided with fastening bolts.

[0008] As a further optimization, the stone pillars are made from waste stone materials from demolished stone structure buildings.

[0009] As a further optimization, the angle steel is an equilateral angle steel.

[0010] As a further optimization, the angle steel and the stone column are bonded together using a dry-hanging stone adhesive.

[0011] As a further optimization, the stone pillar is a granite pillar with a compressive strength range of 105-110MPa and a tensile strength range of 6-10MPa, and has flush upper and lower surfaces.

[0012] As a further optimization, the limiting component is welded from four steel bars of equal length, and the limiting component is adapted to be placed inside the square steel tube.

[0013] As a further optimization, the diameter of the reinforcing bar in the limiting component is 6-8mm.

[0014] This invention also provides a construction method for the above-mentioned square steel tube concrete composite column with internal filling stone, comprising the following steps:

[0015] Step S1: After fixing the positioning mechanism in place, adjust the position of the positioning seat and secure it with fastening bolts;

[0016] Step S2: Fix the four angle steels to the four positioning seats respectively, and then bond the stone columns whose side dimensions match the inner dimensions of the angle steels to the inner sides of the angle steels respectively using stone dry-hanging adhesive;

[0017] Step S3: Fix a set of limiting components in the middle of the four stone pillars at positions near the top and bottom of the angle steel;

[0018] Step S4: Use four sets of gusset plates to connect and fix adjacent angle steels to form a column core assembly;

[0019] Step S5: Hang the square steel pipe on the outside of the column core assembly. After fixing it, pour concrete into the square steel pipe. At the same time, use an immersion vibrator to penetrate into the square steel pipe to vibrate it, so as to ensure the compactness of the concrete in the empty space inside the stone column and the empty space between the stone column and the square steel pipe. Stop pouring when the concrete overflows the upper end of the square steel pipe. After smoothing, a complete square steel pipe concrete composite column is formed.

[0020] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0021] 1. This application provides a method for constructing a square steel tube concrete composite column with internal filling stone. Based on the architectural characteristics of Fujian province, it utilizes locally sourced materials. Fujian's abundant granite reserves and developed stone building market provide industrial support for this technology. Stone has advantages such as high compressive strength, low cost, and easy sourcing. Fujian province and other regions possess high-quality granite resources, and stone structures are the main structural type in southern Fujian. Many stone structures in southern Fujian have been demolished, generating a large amount of old stone as construction waste. The large amount of waste stone generated during demolition can be reused without complex secondary processing. Furthermore, the internal filling stone in the square steel tube concrete reduces the amount of concrete and cement used, thus reducing carbon dioxide emissions. This lowers production costs, avoids pollution and waste, and is conducive to sustainable socio-economic development.

[0022] 2. Replacing most of the concrete inside the steel pipe with large, regularly shaped stones significantly increases the column's compressive strength without altering the cross-sectional size, as the strength-to-mass ratio of stone is much higher than that of concrete and ordinary steel. Furthermore, the brittle fracture characteristic of stone can be mitigated by the restraint provided by angle steel and external square steel pipes. This composite column can significantly improve its axial compressive bearing capacity and overall integrity.

[0023] 3. This composite column has a high material utilization rate, is easy to source, and has a simple process, making it easy to manufacture. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a square steel tube concrete composite column with internal filling stone as described in this invention, before concrete is poured.

[0026] Figure 2 This is a three-dimensional structural diagram of the core assembly of the present invention;

[0027] Figure 3 This is a schematic cross-sectional view of a square steel tube concrete composite column with internal filling stone according to the present invention.

[0028] Figure 4 This is a top view of the positioning mechanism of the present invention.

[0029] Figure 5 This is a schematic diagram of the structure of the positioning mechanism of the present invention when it is adapted to the angle steel.

[0030] The markings in the diagram are: 1. Square steel pipe; 2. Concrete layer; 3. Column core assembly; 4. Angle steel; 5. Stone column; 6. Bracket assembly; 7. Limiting component; 8. Positioning mechanism; 9. Base; 10. Slide rod; 11. Positioning seat; 12. Positioning part; 13. Telescopic rod; 14. Fastening bolt. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] Depend on Figures 1 to 5 As shown, this embodiment of the invention provides a square steel tube concrete composite column with internal filling stone, including a square steel tube 1, a concrete layer 2 and a column core assembly 3; the column core assembly 3 is coaxially arranged inside the square steel tube 1, and the concrete layer 2 fills the empty space inside the square steel tube 1, finally forming a complete square steel tube 1 concrete composite column.

[0033] Preferably, the column core assembly 3 includes four angle steels 4, four granite columns 5, four sets of connecting plate assemblies 6, and at least two sets of limiting components 7. The four angle steels 4 are arranged in an equilateral rectangular array, with one end of the right-angled slot of the angle steel 4 facing inward. In this embodiment, the angle steel 4 is an equilateral angle steel with two equal sides. The four sets of connecting plate assemblies 6 are respectively connected and arranged between the outer ends of adjacent angle steels 4 by welding, so that the four angle steels 4 become a whole and can share the force. The connecting plates of the four sets of connecting plate assemblies 6 are arranged one-to-one to ensure that there are four connecting plates on the same level. The four granite columns 5 are respectively arranged on the inner ends of the four angle steels 4. The granite columns 5 are made of granite. The column has a compressive strength ranging from 105-110 MPa and a tensile strength ranging from 6-10 MPa, and has flush upper and lower surfaces. The side end face of the angle steel 4 is flush with the side face of the stone column 5, thus forming a combination of the stone column 5 with a small square cross-section and the angle steel 4 to form a larger square cross-section, which provides good lateral support between the two. The limiting component 7 has a grid-like structure and is set between the four stone columns 5, abutting against the two inner sides of the stone columns 5 respectively. Thus, the limiting component 7 can provide inner support for the combination of stone columns 5 and angle steel 4, and play a certain positioning and stabilizing role. In this embodiment, the stone column 5 is made by simply processing waste stone from demolished stone structure buildings, which can effectively reduce costs and avoid waste. Furthermore, as one implementation method, the stone column 5 can be formed by combining segmented stones of the same cross-sectional size. When processing the segmented stones, it is necessary to ensure that the upper and lower end faces are flush so that they can overlap in the vertical direction. In addition, for segmented stones whose upper and lower surfaces are not flush, a thin layer of concrete can be used to flatten and fix them together.

[0034] Preferably, it also includes a positioning mechanism 8, which is located below the core assembly 3. The positioning mechanism 8 is used to position the array of the four angle steels 4, thereby ensuring that the core assembly 3 after assembly can become a structure with a square cross-section.

[0035] The positioning mechanism 8 includes a base 9, which is cubic in shape at the bottom and has a cylindrical protrusion at the upper axis. Four equally spaced sliding rods 10 are evenly spaced around the upper circumference of the base 9. Each sliding rod 10 has a slidably mounted positioning seat 11. Each positioning seat 11 has a positioning part 12, the inner end of which is adapted to fit against the outer end of the angle steel 4. Telescopic rods 13 connect adjacent positioning seats 11. During positioning, adjusting the position of one positioning seat 11, through the limiting connection of the telescopic rods 13, ensures that all four positioning seats 11 maintain the same distance from the axis, thereby stably adjusting the size and position of the rectangular array of angle steel 4, ensuring equal spacing and flush outer edges. After confirming the position of the positioning seat 11, it can be fixed using the fastening bolts 14 on the positioning seat 11, keeping the position of the positioning seat 11 relative to the base 9 fixed. Depending on the specifications, the positioning seat 11 can serve as the bottom support for the angle steel 4 and the stone column 5, or after the angle steel 4 is positioned, concrete can be used to level the base 9 to support the larger stone column 5.

[0036] Preferably, as one implementation method, the angle steel 4 and the stone column 5 are bonded together using a dry-hanging stone adhesive.

[0037] Preferably, the limiting component 7 is welded from four steel bars of equal length. The diameter of the steel bars is 6-8mm and the length is similar to the inner diameter of the square steel tube 1. Thus, the limiting component 7 is suitable for being placed inside the square steel tube 1. A gap is left between the ends of the steel bars and the inner wall of the square steel tube 1 during installation. The connection can be made by welding. This ensures that both can be installed and that the square steel tube 1 and the internal column core group 3 can be coaxially set to a great extent.

[0038] This invention also provides a construction method for a square steel tube concrete composite column with internal filling stone, comprising the following steps:

[0039] Step S1: After fixing the base 9 of the positioning mechanism 8 in the designed position, adjust the position of the positioning seat 11 and fix it with the fastening bolt 14; during fixing, it is necessary to ensure that the base 9 of the positioning mechanism 8 is horizontal.

[0040] Step S2: Fix the four angle steels 4 onto the four positioning seats respectively, and bond the stone columns 5, whose side dimensions match the inner dimensions of the angle steels 4, to the inner sides of the angle steels 4 respectively using stone dry-hanging adhesive; wherein, as one embodiment, the stone columns 5 can be formed by assembling segmented stone, and concrete can be poured in advance at the bottom position for preliminary fixation.

[0041] Step S3: Fix a set of limiting components 7 at the top and bottom of the angle steel 4 in the middle of the four stone pillars 5; the steel bars of the limiting components 7 can be welded to the side end of the angle steel 4. The limiting components 7 at the bottom can be used for initial fixation and support, and can also ensure that the overall component is in the middle position relative to the square steel tube 1.

[0042] Step S4: Use four sets of gusset plates 6 to connect and fix adjacent angle steels 4 to form column core group 3; in this way, the angle steel 4 and the stone column 5 form a whole and jointly bear the load. The stone column 5 can increase the compressive strength, and the angle steel 4 can prevent the stone column 5 from brittle failure too quickly, so as to improve the compressive bearing capacity of the combined column and improve the ductility of the component.

[0043] Step S5: Hoist the square steel pipe 1 to the outside of the column core assembly 3. After fixing it, pour concrete into the square steel pipe 1. At the same time, use an immersion vibrator to penetrate into the square steel pipe 1 to vibrate it, so as to ensure the compactness of the concrete in the empty space inside the stone column 5 and the empty space between the stone column 5 and the square steel pipe 1. Stop pouring when the concrete overflows the upper end surface of the square steel pipe 1. After smoothing, it is cured to form a complete square steel pipe 1 concrete composite column.

[0044] This implementation method has advantages such as high compressive strength, low cost, and convenient material sourcing. Furthermore, Fujian Province and other regions possess high-quality granite resources, and stone structures are a major structural type in southern Fujian. With the acceleration of rural urbanization, a large number of stone-structured houses in southern Fujian have been demolished and renovated, generating a large amount of old stone as construction waste. Resource reuse of this waste stone can achieve economic benefits. By filling the square steel pipe 1 with stone columns 5, the amount of concrete and cement used can be reduced, thus reducing carbon dioxide emissions and making it more environmentally friendly. Moreover, the strength-to-density ratio of stone is higher than that of concrete, and the square steel pipe 1 provides restraint for the filling stone, improving the overall brittle fracture resistance of the stone. This combined column can significantly improve axial compressive bearing capacity and overall integrity.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A square steel tube concrete composite column with internal filling stone, characterized in that, It includes a square steel tube, a concrete layer, and a column core assembly; the column core assembly is coaxially arranged inside the square steel tube, and the concrete layer fills the empty space inside the square steel tube; The column core assembly includes four angle steels, four stone pillars, four sets of connecting plates, and at least two sets of limiting components. The four angle steels are arranged in an equilateral rectangular array, with one end of the right-angled groove of each angle steel facing inward. The four sets of connecting plates are respectively connected between the outer ends of adjacent angle steels. The four stone pillars are respectively located at the inner ends of the four angle steels. The side end faces of the angle steels are flush with the side faces of the stone pillars. The limiting components have a grid-like structure and are located between the four stone pillars, abutting against the two inner sides of each stone pillar. It also includes a positioning mechanism, which is located below the column core assembly and is used to position the array of four angle steels. The positioning mechanism includes a base, on which four sliding rods are evenly spaced around the perimeter. A positioning seat is slidably mounted on each sliding rod, and a positioning part is mounted on each positioning seat. The inner end of the positioning part is adapted to fit against the outer end of the angle steel. A telescopic rod is connected between adjacent positioning seats. The positioning seat is equipped with fastening bolts; The stone pillars are made from waste stone materials from demolished stone structures.

2. A square steel tube concrete composite column with internal filling stone according to claim 1, characterized in that... The angle steel is an equilateral angle steel.

3. A square steel tube concrete composite column with internal filling stone according to claim 1, characterized in that... The angle steel and the stone column are bonded together using a dry-hanging adhesive.

4. A square steel tube concrete composite column with internal filling stone according to claim 1, characterized in that... The stone pillar is a granite column with a compressive strength range of 105-110MPa and a tensile strength range of 6-10MPa, and has flush upper and lower surfaces.

5. A square steel tube concrete composite column with internal filling stone according to claim 1, characterized in that... The limiting component is welded from four steel bars of equal length, and the limiting component is adapted to be placed inside the square steel tube.

6. A square steel tube concrete composite column with internal filling stone according to claim 5, characterized in that... The diameter of the reinforcing bar in the limiting component is 6-8mm.

7. A construction method for a square steel tube concrete composite column with internal filling stone according to any one of claims 1-6, characterized in that... This includes the following steps: Step S1: After fixing the positioning mechanism in place, adjust the position of the positioning seat and secure it with fastening bolts; Step S2: Fix the four angle steels to the four positioning seats respectively, and then bond the stone columns whose side dimensions match the inner dimensions of the angle steels to the inner sides of the angle steels respectively using stone dry-hanging adhesive; Step S3: Fix a set of limiting components in the middle of the four stone pillars at positions near the top and bottom of the angle steel; Step S4: Use four sets of gusset plates to connect and fix adjacent angle steels to form a column core assembly; Step S5: Hang the square steel pipe on the outside of the column core assembly. After fixing it, pour concrete into the square steel pipe. At the same time, use an immersion vibrator to penetrate into the square steel pipe to vibrate it, so as to ensure the compactness of the concrete in the empty space inside the stone column and the empty space between the stone column and the square steel pipe. Stop pouring when the concrete overflows the upper end of the square steel pipe. After smoothing, a complete square steel pipe concrete composite column is formed.

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