A pressurized formed precast concrete filled steel tube column

Abstract

The utility model relates to prefabricated steel pipe concrete column technical field especially relates to a kind of pressurized forming prefabricated steel pipe concrete column.Its technical scheme includes: at least two steel pipe concrete columns, both ends of the steel pipe concrete column are fixedly installed with flange plate, the bottom end of the steel pipe concrete column is equipped with exhaust hole, the top end of the steel pipe concrete column is equipped with slurry inlet hole, the slurry inlet hole is equipped with the plug assembly for preventing concrete from flowing out of slurry inlet hole, and post-poured mortar is poured between the two adjacent steel pipe concrete columns.The utility model is equipped with exhaust hole in the bottom end of steel pipe concrete column, and the top end of steel pipe concrete column is equipped with slurry inlet hole, and post-poured mortar is poured between the two adjacent steel pipes by grouting device through slurry inlet hole, the cavity formed between the two concrete end faces can be filled, and the problem of discontinuous concrete in steel pipe can be effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of precast steel tube concrete column technology, and in particular to a pressure-formed precast steel tube concrete column. Background Technology

[0002] Pressure molding, as an innovative and effective method to improve concrete performance, offers a new approach to solving the problem of concrete compaction within steel tubes. On one hand, applying pressure to freshly mixed concrete can expel excess water, reduce porosity, and improve microstructure, thereby increasing concrete strength. On the other hand, the pressure process induces initial circumferential strain in the steel tube, ensuring a tight bond between the concrete and the tube even after shrinkage, allowing for better stress cooperation between them. Pressure molding can be used to produce high-performance precast concrete-steel tube components.

[0003] In steel-concrete composite columns manufactured using a pressure molding process, the precast concrete end face inside the steel tube is lower than the end of the steel tube. When two precast components are vertically connected, a cavity is formed between the two concrete end faces, resulting in discontinuity in the internal concrete. This poses a challenge to the vertical connection of such precast steel-concrete composite columns. Therefore, it is necessary to design an effective vertical joint structure and construction method to solve the vertical connection problem of pressure-molded precast steel-concrete composite columns. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a pressure-formed precast steel tube concrete column.

[0005] The technical solution of this utility model: This application proposes a pressure-formed precast steel-concrete composite column, including at least two steel-concrete composite columns. Both ends of the steel-concrete composite columns are fixedly installed with flanges. The bottom end of the steel-concrete composite column is provided with an exhaust hole, and the top end of the steel-concrete composite column is provided with a grout inlet hole. A plug assembly is provided on the grout inlet hole to prevent concrete from flowing out through the grout inlet hole. Post-cast mortar is poured between two adjacent steel-concrete composite columns.

[0006] Optionally, the steel-concrete composite column includes a steel pipe, and concrete is poured into the steel pipe.

[0007] Optionally, pistons are movably installed at both ends of the steel pipe, and a sealing element is provided between the piston and the inner wall of the steel pipe.

[0008] Optionally, the two steel-concrete composite columns are fixedly connected by bolted connectors, which are mounted on flanges.

[0009] Optionally, the plug assembly includes a connector fixedly installed on the grout inlet hole, a plurality of sealing plates rotatably installed on the connector, a limiting plate fixedly installed inside the connector, a limiting protrusion provided at the end of the connector away from the steel pipe, and the sealing plate abutting against the limiting protrusion.

[0010] Optionally, a grouting device is connected to the grout inlet hole, and the grouting device injects post-cast mortar into the space between two adjacent steel pipes through the grout inlet hole.

[0011] Optionally, an exhaust pipe is fixedly installed on the exhaust port, with the exhaust pipe opening facing upwards and higher than the adjacent concrete.

[0012] Optionally, the strength of the post-pouring mortar is higher than that of the concrete.

[0013] In summary, this application includes at least one of the following beneficial technical effects:

[0014] This invention provides an air vent at the bottom of a steel-concrete composite column and a grout inlet at the top. By using a grouting device to inject post-cast mortar into the space between two adjacent steel pipes through the grout inlet, the cavity formed between the two concrete end faces can be filled, effectively solving the problem of discontinuous concrete inside the steel pipe. Attached Figure Description

[0015] Figure 1 Provide a structural schematic diagram of a precast steel-concrete composite column;

[0016] Figure 2 This is a schematic diagram of the internal structure of the steel pipe;

[0017] Figure 3 This is a schematic diagram of the structure connecting two steel pipes;

[0018] Figure 4 This is a schematic diagram of the structure during grouting of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of this utility model after grouting is completed;

[0020] Figure 6 Provide a structural schematic diagram of the flange;

[0021] Figure 7 This is a schematic diagram of the structure of the plug assembly of this utility model. Figure 1 ;

[0022] Figure 8 This is a schematic diagram of the structure of the plug assembly of this utility model. Figure 2 .

[0023] Reference numerals: 1. Steel pipe; 101. Flange; 102. Concrete; 2. Bolted connector; 3. Vent hole; 301. Grout inlet hole; 4. Connector; 401. Sealing plate; 402. Limiting plate; 403. Protrusion; 5. Grouting device; 6. Vent pipe; 7. Post-pouring mortar; 8. Piston. Detailed Implementation

[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] Examples, such as Figures 1 to 8 As shown, this application proposes a pressure-molded precast steel-concrete composite column, comprising at least two steel-concrete composite columns. Each steel-concrete composite column includes a steel pipe 1, into which concrete 102 is poured. Pistons 8 are movably installed at both ends of the steel pipe 1, and a sealing element is provided between the pistons 8 and the inner wall of the steel pipe 1. The steel-concrete composite column is manufactured using a pressure molding process, which refers to a method of improving the properties of freshly poured concrete 102 by applying mechanical pressure to the freshly poured concrete 102 through the pistons 8 (this is prior art and will not be elaborated here).

[0026] Furthermore, flanges 101 are fixedly installed at both ends of the steel-concrete composite columns, and the two steel-concrete composite columns are fixedly connected by bolted connectors 2, which are installed on the flanges 101. The end face of the pressurized concrete 102 inside the steel pipe 1 is lower than the end of the side wall of the steel pipe 1. After the side wall of the steel pipe 1 is connected by the flanges 101 and the bolted connectors 2, there is a cavity between the end faces of the precast concrete 102 inside the upper and lower steel pipes 1, which needs to be filled with post-cast mortar 7.

[0027] In this embodiment, the bottom end of the steel-concrete composite column is provided with an vent hole 3, and the top end of the steel-concrete composite column is provided with a grout inlet hole 301. The vent hole 3 and the grout inlet hole 301 are distributed on both sides of the steel pipe 1. This is because the concrete height is higher on the side where the grout inlet hole 301 is located, and the vent hole 301 is positioned opposite the vent hole 3 for better venting effect. After the precast pressurized concrete 102 inside the steel pipe 1 is fully formed, holes can be opened at corresponding positions on the wall of the steel pipe 1 to ensure that the vent hole 3 is close to the end face of the precast concrete 102 in the upper steel pipe 1, preventing the air in the upper part of the cavity filled by the post-poured mortar 7 from being sealed, thus improving the venting effect.

[0028] The grout inlet 301 is equipped with a plug assembly to prevent concrete from flowing out through it. Post-cast mortar 7 is poured between two adjacent steel pipe concrete columns. The plug assembly includes a connector 4 fixedly installed on the grout inlet 301. Multiple sealing plates 401 are rotatably installed on the connector 4. A limiting plate 402 is fixedly installed inside the connector 4. A limiting protrusion 403 is provided at the end of the connector 4 away from the steel pipe 1. The sealing plate 401 abuts against the limiting protrusion 403. When post-cast mortar 7 is injected into the cavity between two adjacent steel pipes 1 through the grout inlet 301, the post-cast mortar 7 can move towards the steel pipe 1, thereby creating gaps between the multiple sealing plates 401. This allows the post-cast mortar 7 to enter the cavity between the two adjacent steel pipes 1. After the pouring is completed, the post-cast mortar 7 inside the cavity between the two adjacent steel pipes 1 will flow outward. At this time, the outward flow of post-cast mortar 7 will drive the sealing plates 401 to rotate towards the limiting protrusion 403. When the multiple sealing plates 401 are closed, the sealing plates 401 will abut against the limiting protrusion 403, thereby preventing the sealing plates 401 from rotating and sealing the grout inlet 301.

[0029] Furthermore, by setting a limiting plate 402, the rotation angle of multiple sealing plates 401 is limited, so as to avoid the included angle between the sealing plate 401 and the horizontal axis being greater than 45°. This ensures that the sealing plate 401 can close under the impact of the post-poured mortar 7, and the sealing plate 401 can be reset without the need to set an elastic traction component.

[0030] It should be noted that a grouting device 5 is connected to the grout inlet 301, and the grouting device 5 injects the post-cast mortar 7 into the space between two adjacent steel pipes 1 through the grout inlet 301. It is worth noting that an vent pipe 6 is fixedly installed on the vent hole 3. The vent pipe 6 has its opening facing upwards and is higher than the adjacent concrete 102. The vent pipe 6 is used for venting and determining whether the post-cast mortar 7 has filled the cavity.

[0031] Among them, the strength of the post-poured mortar 7 is higher than that of the concrete 102, in order to achieve the design requirement of "strong nodes and weak components".

[0032] This application proposes a longitudinal connection method for pressure-formed precast steel-concrete composite columns, applicable to the above-mentioned precast steel-concrete composite columns. The method includes the following steps:

[0033] Step 1: Connect the two steel pipe concrete columns together by connecting the two steel pipes 1 through flange 101 and bolt connector 2;

[0034] Step 2: Insert an L-shaped exhaust pipe 6 into the exhaust port 3, with the opening of the exhaust pipe 6 facing upwards;

[0035] Step 3: Using the grouting device 5, inject post-cast mortar 7 into the cavity between the concrete 102 ends of the upper and lower steel pipes 1 through the grout inlet 301.

[0036] Step 4: After observing that the post-pouring mortar 7 overflows from the vent pipe 6, stop grouting and seal the grout inlet hole 301 with the plug assembly; Step 5: After the post-pouring mortar 7 has finally set, knock off the vent pipe 6 and the post-pouring mortar 7 filling the vent pipe 6.

[0037] Step 6: Allow to stand for curing until the post-poured mortar reaches the specified strength.

[0038] In this embodiment, the end face of the pressurized concrete 102 inside the steel pipe 1 is lower than the end face of the side wall of the steel pipe 1. After the side wall of the steel pipe 1 is connected by the flange 101 and the bolt connector 2, there is a cavity between the end faces of the precast concrete 102 inside the upper and lower steel pipes 1, which needs to be filled with post-cast mortar 7. The grouting device 5 injects the post-cast mortar 7 into the space between two adjacent steel pipes 1 through the grout inlet hole 301. An exhaust pipe 6 is fixedly installed on the exhaust hole 3. The exhaust pipe 6 opens upward and is higher than the adjacent concrete 102. The exhaust pipe 6 is used to exhaust air and determine whether the post-cast mortar 7 has filled the cavity.

[0039] When post-cast mortar 7 is injected into the cavity between two adjacent steel pipes 1 through the grout inlet 301, the post-cast mortar 7 can move towards the steel pipe 1, thereby creating gaps between the multiple sealing plates 401. This allows the post-cast mortar 7 to enter the cavity between the two adjacent steel pipes 1. After the pouring is completed, the post-cast mortar 7 inside the cavity between the two adjacent steel pipes 1 will flow outward. At this time, the outward flow of post-cast mortar 7 will drive the sealing plates 401 to rotate towards the limiting protrusion 403. When the multiple sealing plates 401 are closed, the sealing plates 401 will abut against the limiting protrusion 403, thereby preventing the sealing plates 401 from rotating and sealing the grout inlet 301.

[0040] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A pressure-formed precast steel-concrete composite column, comprising at least two steel-concrete composite columns, characterized in that, Both ends of the steel-concrete composite column are fixedly installed with flanges (101). The bottom end of the steel-concrete composite column is provided with an exhaust hole (3). The top end of the steel-concrete composite column is provided with a grout inlet hole (301). The grout inlet hole (301) is provided with a plug assembly to prevent concrete from flowing out through the grout inlet hole (301). Post-cast mortar (7) is poured between two adjacent steel-concrete composite columns.

2. The pressure-formed precast steel-concrete composite column according to claim 1, characterized in that, The steel-concrete composite column includes a steel pipe (1) and concrete (102) is poured into the steel pipe (1).

3. A pressure-formed precast steel-concrete composite column according to claim 2, characterized in that, Pistons (8) are movably installed at both ends of the steel pipe (1), and a sealing element is provided between the piston (8) and the inner wall of the steel pipe (1).

4. A pressure-formed precast steel-concrete composite column according to claim 3, characterized in that, The two steel-concrete composite columns are fixedly connected by bolted connectors (2), which are mounted on flanges (101).

5. A pressure-formed precast steel-concrete composite column according to claim 4, characterized in that, The plug assembly includes a connector (4) fixedly installed on the grout inlet (301), a plurality of sealing plates (401) are rotatably installed on the connector (4), a limiting plate (402) is fixedly installed inside the connector (4), and a limiting protrusion (403) is provided at the end of the connector (4) away from the steel pipe (1), and the sealing plate (401) abuts against the limiting protrusion (403).

6. A pressure-formed precast steel-concrete composite column according to claim 5, characterized in that, A grouting device (5) is connected to the grout inlet (301), and the grouting device (5) injects the post-cast mortar (7) into the space between two adjacent steel pipes (1) through the grout inlet (301).

7. A pressure-formed precast steel-concrete composite column according to claim 6, characterized in that, An exhaust pipe (6) is fixedly installed on the exhaust hole (3). The exhaust pipe (6) has an upward opening and is higher than the adjacent concrete (102).

8. A pressure-formed precast steel-concrete composite column according to claim 7, characterized in that, The strength of the post-cast mortar (7) is higher than that of the concrete (102).

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