Round tube steel column structure

Abstract

The utility model relates to the technical field of steel structures, in particular to a circular tube steel column structure which comprises an upper circular tube steel column and a lower circular tube steel column which are vertically and coaxially arranged, the opposite end faces of the upper circular tube steel column and the lower circular tube steel column are arranged at intervals, and restraining assemblies are installed on the peripheries of the adjacent ends of the upper circular tube steel column and the lower circular tube steel column. The upper end of the restraining assembly is fixedly connected to the outer side wall of the lower end of the upper circular pipe steel column in a sleeving mode, a double-end locking part is arranged in the restraining assembly, and an anti-dislocation reinforcing layer used for reinforcing the double-end locking part is arranged in the inner space of the restraining assembly. Through the design of the restraining assembly, the double-end locking piece and the anti-dislocation reinforcing layer, high-strength connection between the upper circular pipe steel column and the lower circular pipe steel column is achieved, the pulling resistance and shearing resistance of the connecting part are greatly improved, and the overall stability and reliability of the steel structure are effectively enhanced.

Description

Technical Field

[0001] This utility model relates to the field of steel structure technology, and in particular to a circular tube steel column structure. Background Technology

[0002] Circular tube steel columns are mainly composed of pre-cast circular tubes, bases, and column caps. They are hollow steel columns with a circular cross-section. Circular tube cross-sections have a low wind resistance coefficient, which is a significant advantage when applied to structures exposed to fluids (such as wind and water flow). They can reduce the impact of wind loads or water flow impacts on the structure. In steel structure installation, multiple columns are often spliced ​​together.

[0003] A search revealed a steel structure column splicing node and splicing method disclosed in patent document CN202211301903.4, which includes main components such as upper steel column, node connector, middle steel column, first diaphragm, sleeve, cantilever beam segment, lower steel column, and second diaphragm.

[0004] It can be seen that the above structure discloses a splicing structure of circular steel columns, but it has the following problems in use:

[0005] First: When the upper steel column and the lower steel column are connected, they are connected by a sleeve and the end is blocked by the first partition and the second partition. However, this tube-shaft connection method has high requirements for the depth of the steel column. The shaft end connection part in the above structure has problems such as poor connection effect and low load-bearing strength.

[0006] Second: There is no direct connection between the upper steel column and the lower steel column. They are connected by sleeves as intermediate connectors. Both ends need to be positioned as references when connecting, and it is difficult to ensure the coaxiality of the connection during construction.

[0007] Therefore, it is necessary to design a stable, modular circular tube steel column structure in steel structure construction and installation. Utility Model Content

[0008] To solve one of the aforementioned technical problems, the present invention provides the following technical solution: a circular tube steel column structure comprising two vertically and coaxially arranged upper and lower circular tube steel columns, with their opposite end faces spaced apart. A constraint assembly is installed around the adjacent ends of the upper and lower circular tube steel columns. The upper end of the constraint assembly is sleeved and fixed to the lower outer wall of the upper circular tube steel column, and the lower end of the constraint assembly is sleeved and fixed to the upper outer wall of the lower circular tube steel column. A double-headed locking member is provided inside the constraint assembly, with its upper and lower ends extending into the upper and lower circular tube steel columns, respectively. An anti-displacement reinforcement layer is provided within the internal space of the constraint assembly to reinforce the double-headed locking member.

[0009] Based on any of the above technical solutions, a further optimization is made as follows: a first welding ring is fixedly connected to the lower part of the cavity of the upper circular steel column, the outer wall of the first welding ring is integrally fixedly connected to the inner wall of the cavity of the upper circular steel column, and an upper through hole is provided at the center of the first welding ring for the upper end of the double-headed locking member to pass through.

[0010] Based on any of the above technical solutions, a further optimization is made as follows: a second welding ring is fixedly connected to the upper part of the cavity of the lower circular steel column, the outer wall of the second welding ring is integrally fixedly connected to the inner wall of the cavity of the lower circular steel column, and a lower through hole is provided at the center of the second welding ring for the lower end of the double-headed locking member to pass through.

[0011] Based on any of the above technical solutions, a further optimization is made as follows: the constraint assembly includes two symmetrically arranged semi-circular tubular constraint clamps, with connecting plates respectively provided on both sides of each constraint clamp. The opposing connecting plates on the two constraint clamps are mutually abutted and fixedly positioned by locking bolts at their upper and lower ends. The two constraint clamps cooperate to fit and hold the corresponding joints of the upper and lower circular tubular steel columns. An upper stop semi-circular disc and a lower stop semi-circular disc are fixedly arranged at intervals from top to bottom in the middle of each constraint clamp. The tops of the two upper stop semi-circular discs abut against the bottom of the upper circular tubular steel column, and the bottoms of the two lower stop semi-circular discs abut against the top of the lower circular tubular steel column.

[0012] Based on any of the above technical solutions, a further optimization is made as follows: a central space for filling the anti-dislocation reinforcement layer is formed between the two upper stop semi-circular discs and the two lower stop semi-circular discs, and a casting through hole connecting the interior and exterior of the central space is provided on the central sidewall of the constraint clamp directly opposite each central space.

[0013] Based on any of the above technical solutions, a further optimization is made: the anti-dislocation reinforcement layer is formed by the complete cooling and solidification of the high-temperature molten metal poured into the interior of the central space.

[0014] Based on any of the above technical solutions, a further optimization is made: the two casting through holes are used to pour high-temperature molten metal into the central space.

[0015] Based on any of the above technical solutions, a further optimization is made as follows: the double-ended locking component includes a vertically arranged double-ended stud, the upper and lower ends of the double-ended stud movably passing through the central space and extending to the upper part of the first welding ring and the lower part of the second welding ring, respectively. A first constraint nut is fixedly welded to the top of the first welding ring above the upper through hole. The first constraint nut is used to engage with the upper external thread section of the double-ended stud. A second constraint nut is fixedly welded to the bottom of the second welding ring below the lower through hole. The second constraint nut is used to engage with the lower external thread section of the double-ended stud.

[0016] Based on any of the above technical solutions, a further optimization is made as follows: an annular space is provided between the central rings of the two upper stop semicircular discs and the central rings of the two lower stop semicircular discs and the outer wall of the double-ended stud; an upper space is formed between the first welding ring and the two upper stop semicircular discs; a lower space is formed between the second welding ring and the two lower stop semicircular discs; and an anti-dislocation reinforcement layer is filled in the annular space, the upper space, and the lower space.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model achieves a high-strength connection between the upper and lower circular steel columns through the design of constraint components, double-headed locking parts, and anti-dislocation reinforcement layers, which greatly improves the pull-out and shear resistance of the connection parts and effectively enhances the overall stability and reliability of the steel structure.

[0019] 2. This utility model adopts a split-type constraint clamp combined with bolt locking structure, which facilitates quick on-site installation and assembly. At the same time, the clamping force can be adjusted to adapt to round steel columns of different sizes, which significantly improves construction efficiency and installation flexibility.

[0020] 3. This utility model utilizes high-temperature molten metal to fill and form an anti-dislocation reinforcement layer. After curing, it is tightly bonded to each component, which not only eliminates connection gaps and avoids stress concentration, but also has the characteristics of high strength, good durability and no shrinkage, thereby reducing maintenance costs and extending the service life of steel structures. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn to scale.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 This is a schematic diagram of the internal sectional structure of the present invention.

[0024] Figure 3 This is a schematic diagram of the internal cross-sectional structure of this utility model.

[0025] Figure 4 for Figure 3 A partially enlarged structural diagram.

[0026] Figure 5 for Figure 4 A partial structural diagram.

[0027] Figure 6 This is a schematic diagram showing a partial internal structure of the present invention.

[0028] Figure 7 This is a top view of the structure of this utility model.

[0029] In the diagram, 1. Upper circular steel column; 2. Lower circular steel column; 3. Anti-dislocation reinforcement layer; 4. First welding ring; 5. Second welding ring; 6. Constraint clamp; 7. Connecting plate; 8. Locking bolt; 9. Upper stop semi-circular disc; 10. Lower stop semi-circular disc; 11. Casting through hole; 12. Double-ended stud; 13. First constraint nut; 14. Second constraint nut; 15. Annular space; 16. Upper space; 17. Lower space. Detailed Implementation

[0030] The embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of the present utility model, and are therefore merely examples and should not be construed as limiting the scope of protection of the present utility model. The specific structure of the present utility model is as follows: Figures 1-7 As shown in the image.

[0031] Example 1: A circular tube steel column structure includes two vertically and coaxially arranged upper circular tube steel column 1 and lower circular tube steel column 2. The opposite end faces of the upper circular tube steel column 1 and the lower circular tube steel column 2 are spaced apart. A constraint component is installed on the periphery of the adjacent ends of the upper circular tube steel column 1 and the lower circular tube steel column 2. The upper end of the constraint component is sleeved and fixed to the lower outer wall of the upper circular tube steel column 1, and the lower end of the constraint component is sleeved and fixed to the upper outer wall of the lower circular tube steel column 2. A double-headed locking member is provided inside the constraint component. The upper and lower ends of the double-headed locking member extend into the upper circular tube steel column 1 and the lower circular tube steel column 2, respectively. An anti-displacement reinforcement layer 3 is provided in the internal space of the constraint component to reinforce the double-headed locking member.

[0032] This utility model's circular tube steel column structure, through the design of constraint components, double-headed locking parts, and anti-displacement reinforcement layer 3, enables a high-strength connection between the upper circular tube steel column 1 and the lower circular tube steel column 2. The overall structure not only improves the pull-out and shear resistance of the connection points but also significantly enhances the reliability and ease of construction through the constraint clamps 6 of the constraint components, the positioning of the first welding ring 4 and the second welding ring 5, and the anti-displacement reinforcement layer 3 formed by molten metal filling. It is suitable for steel structure engineering scenarios requiring high stability, such as building frames and bridge supports.

[0033] The constraint assembly forms an external constraint by fitting the adjacent ends of the upper and lower circular steel columns 1 and 2 together. A double-headed locking member penetrates the cavity of the upper and lower circular steel columns, providing axial connection force. An anti-displacement reinforcement layer 3 fills the internal space of the constraint assembly, fixing the double-headed locking member and enhancing the overall connection rigidity. Through external constraint, internal locking, and filling reinforcement, the overall connection reliability of the two circular steel columns is improved. The constraint assembly tightly grips the outer perimeter of the circular steel columns, limiting radial displacement and improving connection stability. The double-headed locking member extends deep into the circular steel columns, transmitting axial loads through mechanical locking to prevent the upper and lower columns from separating. The anti-displacement reinforcement layer 3 fills the gaps, preventing the double-headed locking member from shaking and enhancing vibration and impact resistance.

[0034] Based on any of the above technical solutions, a further optimization is made as follows: a first welding ring 4 is fixedly connected to the lower part of the cavity of the upper circular steel column 1, the outer wall of the first welding ring 4 is integrally fixedly connected to the inner wall of the cavity of the upper circular steel column 1, and an upper through hole is provided at the center of the first welding ring 4 for the upper end of the double-headed locking member to pass through.

[0035] The first welding ring 4 is fixed to the lower part of the cavity of the upper circular steel column 1 by welding, forming a rigid support surface; the upper through hole provides a passage for the upper end of the double-headed locking component, while restricting its radial displacement. This allows the welding ring to enhance the structural rigidity of the bottom of the upper circular steel column 1 and avoid local deformation; the upper through hole positions the upper end of the double-headed locking component, ensuring that its axis is coaxial with the circular steel column and uniformly transmitting the load; the welding fixing method ensures the reliability of the connection and avoids potential loosening problems associated with bolted connections.

[0036] The welded ring is integrally formed with the inner wall of the round steel column, forming a rigid anchor point. Compared with the traditional sleeve positioning method, it can withstand greater pull-out force and does not require additional assembly procedures, thus improving construction efficiency.

[0037] Based on any of the above technical solutions, a further optimization is made as follows: a second welding ring 5 is fixedly connected to the upper part of the cavity of the lower circular steel column 2, the outer wall of the second welding ring 5 is integrally fixedly connected to the inner wall of the cavity of the lower circular steel column 2, and a lower through hole is provided in the center of the second welding ring 5 for the lower end of the double-headed locking member to pass through.

[0038] By being symmetrically arranged with the first welding ring 4, it is welded and fixed to the upper part of the cavity of the lower round steel column 2. The lower through hole provides a passage for the lower end of the double-headed locking piece to pass through and be positioned.

[0039] This allows the first welding ring 4 and the second welding ring 5 to form a bidirectional positioning, ensuring that the double-headed locking component penetrates vertically and avoiding eccentric force; it also enhances the top rigidity of the lower round steel column 2, forming a support frame for the double-headed locking component together with the first welding ring 4; the design of the upper and lower through holes facilitates the installation of the double-headed locking component, while restricting its lateral movement and improving the connection accuracy.

[0040] This symmetrical welded ring structure creates upper and lower constraint planes, making the axial force transmission path of the double-headed locking component more direct and reducing stress concentration. Compared with a single-sided positioning structure, it can improve the fatigue resistance of the node.

[0041] Based on any of the above technical solutions, a further optimization is made as follows: the constraint assembly includes two symmetrically arranged semi-circular tubular constraint clamps 6, with connecting plates 7 respectively provided on both sides of each constraint clamp 6. The connecting plates 7 on the two constraint clamps 6 are mutually abutted and fixedly positioned by locking bolts 8 at their upper and lower ends. The two constraint clamps 6 cooperate to fit and hold the corresponding joints of the upper circular steel column 1 and the lower circular steel column 2. In the middle part of each constraint clamp 6, upper stop semi-circular discs 9 and lower stop semi-circular discs 10 are fixedly arranged from top to bottom. The tops of the two upper stop semi-circular discs 9 abut against the bottom of the upper circular steel column 1, and the bottoms of the two lower stop semi-circular discs 10 abut against the top of the lower circular steel column 2.

[0042] Two constraint clamps 6 are assembled into a ring through connecting plate 7 and locking bolt 8 to hold the joint of the round tube steel column; the upper stop semi-circular plate 9 and the lower stop semi-circular plate 10 respectively abut against the end face of the upper round tube steel column 1 and the lower round tube steel column 2 to form axial limit, and at the same time provide support boundary for the anti-dislocation reinforcement layer 3.

[0043] The split clamp design facilitates on-site installation and allows for rapid assembly, improving construction efficiency. The bolt locking structure provides adjustable clamping force to adapt to the connection requirements of round steel columns of different sizes. The upper stop semi-circular disc 9 and the lower stop semi-circular disc 10 restrict the axial displacement of the upper round steel column 1 and the lower round steel column 2, forming a rigid support surface in conjunction with the anti-dislocation reinforcement layer 3.

[0044] Based on any of the above technical solutions, a further optimization is made as follows: a central space for filling the anti-dislocation reinforcement layer 3 is formed between the two upper stop semi-circular disks 9 and the two lower stop semi-circular disks 10, and a casting through hole 11 connecting the inside and outside of the central space is provided on the central side wall of the constraint clamp 6 opposite to each central space.

[0045] The central space provides a container for the anti-dislocation reinforcement layer 3. The casting through-hole 11 serves as an injection channel for high-temperature molten metal. After the liquid metal fills the gaps and solidifies, it forms a reinforcement structure that is tightly integrated with the restraint components and double-headed locking parts. In addition, the design of the casting through-hole 11 facilitates construction operations and allows for increased filling density through pressure casting.

[0046] Based on any of the above technical solutions, a further optimization is made: the anti-dislocation reinforcement layer 3 is formed by the complete cooling and solidification of the high-temperature molten metal poured into the interior of the central space.

[0047] High-temperature molten metal is injected into the central space through the casting through-hole 11. The liquid metal fills all gaps and, after cooling, forms a firm bond with the constraint components, double-headed locking components, and the surface of the circular steel column, creating an integral reinforcement layer. Furthermore, the metal exhibits high strength and durability after solidification, allowing it to withstand alternating loads for extended periods. Its non-shrinkage characteristics ensure dense filling, avoiding the shrinkage cracking problems of traditional materials. Its homogeneous bonding with the metal components and consistent coefficient of thermal expansion reduce the impact of temperature stress.

[0048] Based on any of the above technical solutions, a further optimization is made: the two casting through holes 11 are used to pour high-temperature molten metal into the central space.

[0049] As the inlet for molten metal, the pouring speed and pressure are controlled to ensure complete filling of the central space. Convection filling can be achieved through dual-hole pouring, preventing air bubble retention and improving the quality of the reinforcement layer.

[0050] Based on any of the above technical solutions, a further optimization is made as follows: the double-ended locking component includes a vertically arranged double-ended stud 12, the upper and lower ends of the double-ended stud 12 movably passing through the central space and extending to the upper part of the first welding ring 4 and the lower part of the second welding ring 5, respectively. A first constraint nut 13 is fixedly welded to the top of the first welding ring 4 above the upper through hole. The first constraint nut 13 is used to engage with the upper external thread section of the double-ended stud 12. A second constraint nut 14 is fixedly welded to the bottom of the second welding ring 5 below the lower through hole. The second constraint nut 14 is used to engage with the lower external thread section of the double-ended stud 12.

[0051] The double-ended stud 12 is fixed to the first welding ring 4 and the second welding ring 5 by the first constraint nut 13 and the second constraint nut 14, forming a bolt and nut mechanical connection. The axial load is transmitted through the thread to the corresponding first welding ring 4, second welding ring 5 and upper round steel column 1 and lower round steel column 2.

[0052] Example 2: Compared with Example 1, this example also includes the following technical features:

[0053] Based on any of the above technical solutions, a further optimization is made as follows: an annular space 15 is provided between the central rings of the two upper stop semicircular discs 9 and the central rings of the two lower stop semicircular discs 10 and the outer wall of the double-headed stud 12; an upper space 16 is formed between the first welding ring 4 and the two upper stop semicircular discs 9; a lower space 17 is formed between the second welding ring 5 and the two lower stop semicircular discs 10; and an anti-dislocation reinforcement layer 3 is filled in the annular space 15, the upper space 16, and the lower space 17.

[0054] The filling range of the anti-dislocation reinforcement layer 3 is expanded to cover the internal annular space 15, upper space 16, and lower space 17, so that the entire section of the double-ended stud 12 is wrapped with the metal reinforcement layer. The full space filling eliminates all gaps and avoids stress concentration points; the anti-dislocation reinforcement layer 3 wraps the entire section of the double-ended stud 12, enhances shear resistance, and prevents the double-ended stud 12 from shearing off at the first welded ring 4 and the second welded ring 5; the load-bearing area is expanded, so that the load is evenly transferred to the entire cross section of the upper circular steel column 1 and the lower circular steel column 2 through the anti-dislocation reinforcement layer 3.

[0055] Assembly process:

[0056] I. Modular pre-assembly of welding ring and constraint nut:

[0057] 1. Upper circular steel column module: First welding ring 4 + First constraint nut 13

[0058] Operating steps:

[0059] In a workshop environment, the first welding ring 4 and the first constraint nut 13 are pre-assembled into an integral module:

[0060] Place the first constraint nut 13 on top of the first welding ring 4 (directly above the upper through hole), ensuring that the center of the nut is coaxial with the upper through hole, and use a full penetration welding process to firmly weld the bottom surface of the nut to the top surface of the welding ring (the weld height is not less than 80% of the nut thickness).

[0061] Check module coaxiality: Use a gauge to measure the deviation between the axis of the internal thread of the nut and the axis of the through hole on the welding ring. It must be ≤0.2mm.

[0062] The pre-assembled modules are welded as a whole to the lower part of the cavity of the upper circular steel column 1:

[0063] The positioning module ensures that the outer wall of the welding ring fits against the inner wall of the circular steel column. A symmetrical segmented welding method (such as welding segments at 90° intervals) is used to reduce welding deformation and ensure that the plane of the welding ring is perpendicular to the axis of the circular steel column.

[0064] 2. Lower circular steel column module: 5 second welding rings + 14 second constraint nuts

[0065] Operating steps:

[0066] Similarly, the second welding ring 5 and the second constraint nut 14 are pre-assembled into an integral module, and the welding process is the same as that of the upper module to ensure that the lower through hole and the internal thread of the nut are coaxial.

[0067] The module is welded as a whole to the upper part of the cavity of the lower circular steel column 2. During welding, the heat input is controlled to avoid deformation of the lower end face of the circular steel column.

[0068] Key points:

[0069] Pre-assembled modules need to undergo mechanical testing (such as pull-out tests) to verify the connection strength between the welded ring and the constraint nut.

[0070] After the modules are welded, the end face of the round steel column needs to be machined to ensure that the flatness error of the mating surface is ≤0.1mm.

[0071] II. Installation and pre-fixation of double-headed locking components:

[0072] 3. Double-ended stud 12-piece fitting:

[0073] Insert the double-ended stud 12 upwards from below the second constraint nut 14 of the lower round steel column 2 module:

[0074] The lower end of the stud passes through the lower through hole of the second welding ring 5 until the upper end of the stud extends out from the upper through hole of the first welding ring 4.

[0075] Check the fit between the stud and the upper and lower modules: the stud should be able to pass freely through the through hole without obstruction, and engage smoothly with the internal thread of the nut.

[0076] 4. Pre-fixing and coaxiality adjustment:

[0077] Manually tighten the first constraint nut 13 and the second constraint nut 14 to initially fix the stud. At this time, the preload only needs to reach 10%-20% of the design value for temporary positioning.

[0078] Use a laser alignment instrument to check the coaxiality between the stud axis and the cylindrical steel column axis. The deviation must be ≤1mm. If it exceeds the tolerance, it needs to be corrected by fine-tuning the position of the welding ring or grinding the edge of the through hole.

[0079] III. Constraint Component Installation:

[0080] 5. Positioning of the constraint clamp 6:

[0081] The two semi-circular tubular constraint clamps 6 are respectively fitted onto the lower end of the upper circular steel column 1 and the upper end of the lower circular steel column 2. The key points of the operation are as follows:

[0082] The top of the upper stop semicircular disc 9 of the clamp must be tightly fitted to the bottom end face of the upper round steel column 1, and the bottom of the lower stop semicircular disc 10 must be fitted to the top end face of the lower round steel column 2 to form axial positioning.

[0083] Avoid double-ended studs 12: When inserting the clamp, ensure that the central ring of the upper and lower stop semicircular discs 9 and 10 has a reserved annular space 15 between it and the outer wall of the stud.

[0084] 6. Fasten the constraint components:

[0085] Align the connecting plates 7 of the two clamps, insert the locking bolts 8, and tighten them in stages:

[0086] Pre-tightening stage: Tighten all bolts to 30% of the design torque to allow the clamps to initially grip the round steel column. At the same time, adjust the circumferential position of the clamps to ensure that the pouring through hole 11 is aligned with the central space.

[0087] Final tightening stage: Tighten the bolts in diagonal order to the designed torque (if using a torque wrench, the error is ±5%), so that the clamp fits tightly against the outer wall of the round steel column (gap ≤0.2mm).

[0088] IV. Pouring of Anti-Dislocation Reinforcement Layer 3:

[0089] High-temperature molten metal injection:

[0090] Molten metal (such as low-shrinkage steel containing trace elements) is injected into the casting through hole 11 of the constraint clamp 6 using pressure casting method. The middle space is poured first, and then overflows to the upper and lower spaces.

[0091] For the annular space 15, auxiliary pouring is required from the gap of the center ring of the stop semi-circular disc to ensure that the entire stud is covered by molten metal.

[0092] Quality control:

[0093] During the pouring process, the temperature of the molten metal is continuously monitored to ensure that it is not lower than 50°C below the liquidus temperature, thus preventing premature solidification.

[0094] Use the tapping method to check the filling density: After pouring, tap the clamp lightly. If a crisp sound is produced, it indicates that the filling is dense. If a dull sound is produced, it indicates that additional filling is needed.

[0095] 7. Curing and Surface Treatment

[0096] After natural cooling for 48 hours, remove excess metal from the pouring holes and sandblast the surface of the reinforcement layer to ensure that the roughness meets the requirements for the construction of the anti-corrosion coating.

[0097] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. For those skilled in the art, any alternative improvements or transformations made to the implementation of this utility model fall within the protection scope of this utility model.

[0098] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A circular tube steel column structure, characterized in that: The device includes two vertically aligned and coaxially arranged upper and lower circular steel columns, with their opposite end faces spaced apart. A constraint assembly is installed around the adjacent ends of the upper and lower circular steel columns. The upper end of the constraint assembly is sleeved and fixed to the lower outer wall of the upper circular steel column, and the lower end of the constraint assembly is sleeved and fixed to the upper outer wall of the lower circular steel column. A double-headed locking member is provided inside the constraint assembly, with its upper and lower ends extending into the upper and lower circular steel columns, respectively. An anti-displacement reinforcement layer is provided within the internal space of the constraint assembly to reinforce the double-headed locking member.

2. The circular tube steel column structure according to claim 1, characterized in that: A first welding ring is fixedly connected to the lower part of the cavity of the upper circular steel column. The outer wall of the first welding ring is integrally fixed to the inner wall of the cavity of the upper circular steel column. An upper through hole is provided at the center of the first welding ring for the upper end of the double-headed locking member to pass through.

3. The circular tube steel column structure according to claim 2, characterized in that: A second welding ring is fixedly connected to the upper part of the cavity of the lower circular steel column. The outer wall of the second welding ring is integrally fixed to the inner wall of the cavity of the lower circular steel column. A lower through hole is provided in the center of the second welding ring for the lower end of the double-headed locking member to pass through.

4. A circular tube steel column structure according to claim 3, characterized in that: The constraint assembly includes two symmetrically arranged semi-circular tubular constraint clamps. Connecting plates are provided on both sides of each constraint clamp. The opposing connecting plates on the two constraint clamps are pressed against each other and locked in place by locking bolts at their upper and lower ends. The two constraint clamps cooperate to fit and hold the corresponding joints of the upper and lower circular steel columns. Upper stop semi-circular discs and lower stop semi-circular discs are fixedly arranged at intervals from top to bottom in the middle of each constraint clamp. The tops of the two upper stop semi-circular discs abut against the bottom of the upper circular steel column, and the bottoms of the two lower stop semi-circular discs abut against the top of the lower circular steel column.

5. A circular tube steel column structure according to claim 4, characterized in that: A central space for filling the anti-dislocation reinforcement layer is formed between the two upper stop semi-circular discs and the two lower stop semi-circular discs. A casting through hole connecting the inside and outside of the central space is provided on the central sidewall of the constraint clamp directly opposite each central space.

6. A circular tube steel column structure according to claim 5, characterized in that: The anti-dislocation reinforcement layer is formed by the complete cooling and solidification of the high-temperature molten metal poured into the central space.

7. A circular tube steel column structure according to claim 6, characterized in that: The two casting through holes are used to pour high-temperature molten metal into the central space.

8. A circular tube steel column structure according to claim 7, characterized in that: The double-ended locking component includes a vertically arranged double-ended stud. The upper and lower ends of the double-ended stud movably pass through the central space and extend to the upper part of the first welding ring and the lower part of the second welding ring, respectively. A first constraint nut is fixedly welded to the top of the first welding ring above the upper through hole. The first constraint nut is used to engage with the upper external thread section of the double-ended stud. A second constraint nut is fixedly welded to the bottom of the second welding ring below the lower through hole. The second constraint nut is used to engage with the lower external thread section of the double-ended stud.

9. A circular tube steel column structure according to claim 8, characterized in that: An annular space is provided between the central rings of the two upper stop semicircular discs and the central rings of the two lower stop semicircular discs and the outer wall of the double-ended stud. An upper space is formed between the first welding ring and the two upper stop semicircular discs, and a lower space is formed between the second welding ring and the two lower stop semicircular discs. An anti-displacement reinforcement layer is filled in the annular space, the upper space, and the lower space.

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