Composite concrete-filled steel tube combination column and mounting method thereof

Abstract

The invention relates to the technical field of pier buildings, in particular to a composite concrete filled steel tube combination column and a mounting method thereof. Comprising a plurality of steel pipes sequentially arranged in the axial direction, and the cross section areas of the steel pipes are the same. An internal connection mechanism is arranged at the internal connection position between every two adjacent steel pipes, and an external connection mechanism is arranged at the external connection position between every two adjacent steel pipes. Built-in profile steel penetrates through the interiors of the steel pipes, and the interiors of the steel pipes are filled with concrete. The anti-bending bearing capacity and the anti-seismic property of the joint are improved, the engineering construction progress is accelerated, and the time efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge pier construction, and in particular to a composite steel tube concrete combined column and an installation method thereof. Background Art

[0002] As the primary means for modern railway systems to traverse complex terrain, bridges face significant challenges in harsh geological and climatic environments. To ensure the viability of high-speed railway bridges in environments characterized by frequent freeze-thaw cycles, strong earthquakes, and high corrosion, three performance requirements are placed on railway pier components: higher load-bearing capacity to withstand the loads of large-span, heavy-duty equipment; stronger seismic resistance to withstand potential shallow, intense earthquakes; and a safer service life to delay steel corrosion and ensure structural safety and stability.

[0003] Steel tube concrete composite structures have the advantages of high bearing capacity and good ductility, and are one of the structural forms used in bridges. However, the application of ordinary steel tube concrete composite structures in harsh geological and climatic environments has the following problems: (1) low-temperature welding is prone to brittle fracture; (2) the temperature and air pressure in high-altitude areas are low, which leads to insufficient toughness of welding materials and unstable welding pool quality, thereby affecting the performance of welds and increasing the risk of brittle fracture; (3) factors such as large temperature differences between day and night, strong ultraviolet rays, and dew and frost accelerate the aging and shedding of the steel protective layer, resulting in relatively serious corrosion of steel. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned defects in the prior art and propose a composite steel tube concrete composite column and an installation method.

[0005] In order to achieve the above-mentioned object, the present application proposes a composite steel tube concrete composite column, which comprises a plurality of steel tubes arranged in sequence along the axial direction, and each steel tube has the same cross-sectional area;

[0006] An internal connection mechanism is provided at the internal connection between two adjacent steel pipes, and an external connection mechanism is provided at the external connection between two adjacent steel pipes;

[0007] An internal steel section penetrates the interior of each steel pipe, and the interior of the steel pipe is filled with concrete.

[0008] In the present invention, the internally implanted connection mechanism includes two internal positioning plates, which are respectively located inside two adjacent steel pipes and are fixedly connected by a number of implanted bars.

[0009] The external connection mechanism includes a plurality of axial connection plates arranged along the axial direction, and the axial connection plates are fixedly connected by an annular connection plate;

[0010] The inner surface of the external connection mechanism is in close contact with the outer surface of the steel pipe.

[0011] The external connection mechanism includes a plurality of external connection blocks, and the external connection blocks include an axial connection plate and an annular connection plate;

[0012] The adjacent two axial connection plates of the adjacent two external connection blocks are fixedly connected by bolts. During the process of tightening the bolts, the external connection mechanism is fastened to the connection between the outsides of the two adjacent steel pipes.

[0013] Internal positioning blocks are fixed on the inner walls of the steel pipes;

[0014] The internally implanted connection mechanism is located between the internal positioning blocks in two adjacent steel pipes. The two positioning plates of the internally implanted connection mechanism are in contact with the internal positioning blocks in the two adjacent steel pipes respectively. The internally implanted connection mechanism is positioned between the internal positioning blocks in the two adjacent steel pipes.

[0015] The size of the positioning plate of the internally implanted connection mechanism is larger than the size of the inner hole surrounded by the internal positioning blocks.

[0016] External positioning blocks are fixed on the outer walls of the steel pipes;

[0017] The external connection mechanism is located between the outer positioning blocks of two adjacent steel pipes, and both ends of the external connection mechanism are in contact with the outer positioning blocks of the two adjacent steel pipes respectively. The external connection mechanism is positioned between the outer positioning blocks of the two adjacent steel pipes.

[0018] The present application also discloses a method for installing the composite steel tube concrete composite column, comprising the following steps:

[0019] A. Insert the bottom end of the internal connection mechanism into a steel pipe and insert the internal steel into the internal connection mechanism;

[0020] B. Put another steel pipe on the upper end of the internal connection mechanism from top to bottom, and put the steel pipe on the outer side of the ring of the internal connection mechanism;

[0021] C. An external connection mechanism is installed at the connection between the outsides of two adjacent steel pipes, and the external connection mechanism is fastened to the outer surface of the steel pipe;

[0022] D. Pour concrete into the steel pipe.

[0023] During installation, the internal connection mechanism is positioned between the internal positioning blocks of two adjacent steel pipes;

[0024] During installation, the external connection mechanism is positioned between the external positioning blocks of two adjacent steel pipes.

[0025] The beneficial effects of the present invention are:

[0026] (1) The steel pipe in the present invention is made of stainless steel pipe, which has good corrosion resistance and can better adapt to the environmental characteristics of frequent freeze-thaw cycles and high corrosion under harsh geological and climatic conditions;

[0027] (2) Through the internal connection mechanism, the concrete column connection between the two adjacent steel pipes is realized internally, thereby enhancing the strength of the connection between the two adjacent steel pipes from the inside of the steel pipe;

[0028] (4) The external connection mechanism is wrapped around the connection between the first steel pipe and the second steel pipe, connecting the two adjacent steel pipes together from the outside to improve the bending bearing capacity and seismic performance of the connection;

[0029] (5) The connection between two adjacent steel pipes is achieved through the internal connection mechanism and the external connection mechanism, without the need for welding process, thus avoiding the quality defects caused by welding;

[0030] (6) In this application, positioning blocks are used to achieve positioning of the internal connection mechanism and the external connection mechanism, thereby accelerating the construction progress and improving time efficiency;

[0031] (7) High-strength steel sections are built into the steel tube concrete column, and the cross-sectional structure of the steel sections enhances the restraint effect on the concrete, thereby improving the bearing capacity and seismic performance of the composite column. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of the overall structure of the composite column in Example 1;

[0033] Figure 2 This is a schematic diagram of the structural decomposition of the composite column in Example 2;

[0034] Figure 3 It is a structural decomposition diagram of the external connection mechanism;

[0035] Figure 4 It is an overall schematic diagram of the implant connection mechanism;

[0036] Figure 5 It is a structural diagram of built-in steel;

[0037] Figures 6(a)-6(f) is a schematic diagram of the decomposition of the installation steps of Example 1;

[0038] Figure 7 is a schematic diagram of the overall structure of the combined column in Example 2;

[0039] Figure 8 It is a schematic diagram of the explosion structure of the composite column in Example 2.

[0040] Among them: 1. Concrete; 2. First steel pipe; 3. External connection mechanism; 4. Second steel pipe; 5. Internal steel section; 6. Internal connection mechanism; 7. First external positioning block; 8. First internal positioning block; 9. Second external positioning block; 10. Second internal positioning block; 11. Axial connecting plate; 12. Circumferential connecting plate; 13. First internal positioning plate; 14. Embedded steel bars; 15. Second internal positioning plate; 16. Fixing bolts; 17. T-shaped steel. DETAILED DESCRIPTION

[0041] The present invention will be further described below with reference to the accompanying drawings.

[0042] Example 1

[0043] like Figure 1 and Figure 2 As shown, the composite steel tube concrete composite column described in the present invention includes several steel tubes arranged in sequence along the axial direction, each having the same cross-sectional area. An internal connection mechanism 6 is provided at the connection between the interiors of two adjacent steel tubes, which connects the two adjacent steel tubes internally via the internal connection mechanism. An external connection mechanism 3 is provided at the connection between the exteriors of the two adjacent steel tubes, which connects the two adjacent steel tubes externally via the external connection mechanism.

[0044] Internal steel sections 5 are inserted through the interiors of several steel tubes, passing through internal connecting mechanisms 6. Concrete 5 is also filled inside the steel tubes. The concrete 5 and the internal steel sections 5 interact effectively: the concrete prevents the internal steel sections 5 from bending; the internal steel sections 5 also strengthen the concrete's restraint, improving the composite column's bearing capacity and seismic performance.

[0045] In this embodiment, the two adjacent steel tubes are a first steel tube 2 and a second steel tube 4. An internal connection mechanism 6 is provided at the internal connection of the first steel tube 2 and the second steel tube 4, and an external connection mechanism 3 is provided at the external connection of the first steel tube 2 and the second steel tube 4. An internal steel section 5 is provided extending through the interior of the first steel tube 2 and the second steel tube 4. In this embodiment, the first steel tube 2 and the second steel tube 4 are square tubes.

[0046] Internal positioning blocks are provided on the inner walls of the first steel tube 2 and the second steel tube 4, respectively. These blocks position the internal connection mechanism at the internal connection of the first steel tube 2 and the second steel tube 4. In this embodiment, a plurality of first internal positioning blocks 8 are provided on the inner wall of the first steel tube 2, and a plurality of second internal positioning blocks 10 are provided on the inner wall of the second steel tube 4. The internal connection mechanism 6 is located between the first and second internal positioning blocks 8, 10. The first internal positioning blocks 8 block the top surface of the internal connection mechanism, while the second internal positioning blocks 10 block the bottom surface of the internal connection mechanism, thereby confining the internal connection mechanism 6 between the first and second internal positioning blocks 8, 10.

[0047] like Figure 4 As shown, the internal implant connection mechanism includes a first internal positioning plate 13 and a second internal positioning plate 15. The first internal positioning plate 13 and the second internal positioning plate 15 are fixedly connected by several embedded steel bars 14. The two ends of the embedded steel bars 14 are respectively fixedly connected to the first internal positioning plate 13 and the second internal positioning plate 15 by fixing bolts 16.

[0048] The first inner positioning plate 13 is located below the first inner positioning block 8, and the size of the first inner positioning plate 13 is larger than the inner hole diameter surrounded by the first inner positioning block 8. The second inner positioning plate 15 is located above the second inner positioning block 10, and the size of the second inner positioning plate 15 is larger than the inner hole diameter surrounded by the second inner positioning block 10.

[0049] External positioning blocks are provided on the outer walls of the first steel tube 2 and the second steel tube 4, respectively. These blocks position the external connection mechanism at the external connection point of the first and second steel tubes 2 and 4. In this embodiment, several first external positioning blocks 7 are provided on the outer wall of the first steel tube 2, and several second external positioning blocks 9 are provided on the outer wall of the second steel tube 4. The external connection mechanism 4 is positioned between the first and second external positioning blocks 7, 9. The first external positioning blocks 7 block the top surface of the external connection mechanism, while the second external positioning blocks 9 block the bottom surface of the external connection mechanism, thereby confining the external connection mechanism 4 between the first and second external positioning blocks 7, 9.

[0050] like Figure 3 As shown, the external connection mechanism includes several axial connecting plates 11 arranged along the axial direction of the steel pipe. Adjacent axial connecting plates 11 are fixedly connected by several annular connecting plates 12. The inner side surfaces of the axial connecting plates 11 and the inner side surfaces of the annular connecting plates 11 both conform to the outer surface of the steel pipe. The axial connecting plates 11 connect the exterior of the first steel pipe 2 and the second steel pipe 4. The annular connecting plates 11 surround the outer circumference of the first steel pipe 2 and the second steel pipe 4, improving the bending resistance of the connection between the two adjacent steel pipes.

[0051] In this application, to secure the external connection mechanism to the outside of the steel pipe, the external connection mechanism includes several external connection blocks. Each external connection block includes an axial connection plate 11 and an annular connection plate 12. The adjacent axial connection plates of two adjacent external connection blocks are fixedly connected by bolts. During the tightening of the bolts, the external connection mechanism is fixedly sleeved on the external connection between the first and second steel pipes.

[0052] The top surface of the external connection mechanism is located below the first external positioning block 7, and the bottom surface of the external connection mechanism is located above the second external positioning block 9. The size of the inner hole formed by the annular connection plate located at the top of the external connection mechanism is smaller than the outer diameter size enclosed by the first external positioning block 7, and the size of the inner hole formed by the annular connection plate located at the bottom of the external connection mechanism is smaller than the outer diameter size enclosed by the second external positioning block 9.

[0053] In the present application, the positioning of the internal connection mechanism is achieved through the internal positioning block, and the positioning of the external connection mechanism is achieved through the external positioning block, thereby improving the connection speed and connection accuracy between two adjacent steel pipes.

[0054] like Figure 5 As shown, the built-in steel section 5 includes a plurality of T-shaped steel sections 17. In this embodiment, the built-in steel section 5 is formed by four T-shaped steel sections 17 being welded and fixed.

[0055] like Figure 6(a) to Figure 6(f) As shown, the installation method of the composite steel tube concrete composite column described in this embodiment is as follows.

[0056] A. Installing the internal implant connection mechanism: The first internal positioning plate 13 and the second internal positioning plate 15 are fixedly connected by a plurality of implant bars 14 to form an internal implant connection mechanism, as shown in FIG. 6( a ).

[0057] B. Insert the embedded connection mechanism 6 into the second steel pipe 4, and the bottom surface of the second inner positioning plate 15 contacts the second inner positioning block 10 on the inner wall of the second steel pipe 4, thereby determining the position of the embedded connection mechanism 6 in the second steel pipe 4, as shown in Figure 6(b).

[0058] C. Insert the built-in steel 5 into the embedded connection mechanism 6, as shown in Figure 6(c).

[0059] D. As shown in FIG6(d), the first steel pipe 2 is installed from top to bottom, and the first steel pipe 2 is sleeved on the outside of the internal connection mechanism 6. At this time, the first inner positioning block 8 contacts the first inner positioning plate 13 of the internal connection mechanism 6, thereby determining the position of the first steel pipe 2.

[0060] E. Sleeve the external connection mechanism 3 onto the outside of the first steel pipe 2 and the second steel pipe 4, and limit the external connection mechanism 3 between the first external positioning block 7 and the second external positioning block 9, then tighten the bolts to fasten the external connection mechanism 3 at the external connection of the first steel pipe 2 and the second steel pipe 4.

[0061] F. Concrete 1 is poured into the interior of the steel tube to finally form a steel tube concrete composite column, as shown in Figure 6(f).

[0062] Example 2

[0063] like Figure 7 and Figure 8 As shown, the steel pipe in this embodiment is cylindrical. In this case, the corresponding first inner positioning plate 13 and second inner positioning plate 15 of the internal connection mechanism 6 are both circular in cross-section. The inner hole of the external connection mechanism formed by connecting the axial connection plate 11 and the annular connection plate 12 is cylindrical, and the inner surface of the external connection mechanism conforms to the cylindrical outer surface of the steel pipe.

[0064] Other details are the same as in Example 1.

[0065] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A composite steel tube concrete composite column, characterized in that: It includes several steel pipes arranged in sequence along the axial direction, and each steel pipe has the same cross-sectional area; An internal connection mechanism is provided at the internal connection between two adjacent steel pipes, and an external connection mechanism is provided at the external connection between two adjacent steel pipes; An internal steel section penetrates the interior of each steel pipe, and the interior of the steel pipe is filled with concrete.

2. The composite steel tube concrete composite column according to claim 1, characterized in that: The internal implant connection mechanism includes two internal positioning plates, which are respectively located inside two adjacent steel pipes and are fixedly connected by a number of implant bars.

3. The composite steel tube concrete composite column according to claim 1, characterized in that: The external connection mechanism includes a plurality of axial connection plates arranged along the axial direction, and the axial connection plates are fixedly connected by an annular connection plate; The inner surface of the external connection mechanism is in close contact with the outer surface of the steel pipe.

4. The composite steel tube concrete composite column according to claim 3, characterized in that: The external connection mechanism includes a plurality of external connection blocks, and the external connection blocks include an axial connection plate and an annular connection plate; The adjacent two axial connection plates of the adjacent two external connection blocks are fixedly connected by bolts. During the process of tightening the bolts, the external connection mechanism is fastened to the connection between the outsides of the two adjacent steel pipes.

5. The composite steel tube concrete composite column according to claim 2, characterized in that: Internal positioning blocks are fixed on the inner walls of the steel pipes; The internally implanted connection mechanism is located between the internal positioning blocks in two adjacent steel pipes. The two positioning plates of the internally implanted connection mechanism are in contact with the internal positioning blocks in the two adjacent steel pipes respectively. The internally implanted connection mechanism is positioned between the internal positioning blocks in the two adjacent steel pipes.

6. The composite steel tube concrete composite column according to claim 5, characterized in that: The size of the positioning plate of the internally implanted connection mechanism is larger than the size of the inner hole surrounded by the internal positioning blocks.

7. The composite steel tube concrete composite column according to claim 3, characterized in that: External positioning blocks are fixed on the outer walls of the steel pipes; The external connection mechanism is located between the outer positioning blocks of two adjacent steel pipes, and both ends of the external connection mechanism are in contact with the outer positioning blocks of the two adjacent steel pipes respectively. The external connection mechanism is positioned between the outer positioning blocks of the two adjacent steel pipes.

8. A method for installing a composite steel tube concrete composite column according to any one of claims 1 to 7, characterized in that: The following steps are involved: A. Insert the bottom end of the internal connection mechanism into a steel pipe and insert the internal steel into the internal connection mechanism; B. Put another steel pipe on the upper end of the internal connection mechanism from top to bottom, and put the steel pipe on the outer side of the ring of the internal connection mechanism; C. An external connection mechanism is installed at the connection between the two adjacent steel pipes, and the external connection mechanism is fastened to the outer surface of the steel pipe; D. Pour concrete into the steel pipe.

9. The installation method according to claim 8, characterized in that: During the installation process of the internal connection mechanism, it is positioned between the internal positioning blocks of two adjacent steel pipes; During the installation process of the external connection mechanism, it is positioned between the external positioning blocks of two adjacent steel pipes.

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