Novel cavity prefabricated concrete filled steel tubular column and manufacturing method thereof

By forming a cavity in the steel pipe concrete column and using high-pressure grouting filling, the problem of concrete not dense in traditional construction is solved, and efficient and low-cost construction quality assurance is achieved, cavity and hole defects are avoided, and the compactness and temperature difference resistance of the structure are enhanced.

CN120486659APending Publication Date: 2025-08-15MCC5 GROUP SHANGHAI CORPORATION LIMITED
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Patent Information

Application Number
CN202510752764.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-06
Publication Date
2025-08-15

AI Technical Summary

Technical Problem

During the construction process of traditional steel pipe concrete columns, there are problems with the internal concrete pouring, local cavity and node position concrete pouring quality problems, making it difficult to ensure the construction quality.

Method used

A new type of prefabricated steel pipe concrete column is used to form a through cavity by pouring concrete into the steel pipe and centrifugal rotation about the axial direction. A high-pressure grouting machine is used to inject micro-expanded grouting material or cement slurry into filling the cavity and node space to ensure compactness.

Benefits of technology

The construction quality is guaranteed, and the poor quality defects such as cavity and holes are avoided. The production speed is fast and the cost is low. The concrete and steel pipe wall are closely fitted to resist the influence of temperature difference.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a novel cavity prefabricated concrete-filled steel tube column which comprises a steel tube and a concrete layer, the concrete layer is located in the steel tube, a through cavity is formed in the middle of the concrete layer, the head and the tail of the cavity prefabricated concrete-filled steel tube column are welded to beam-column joints above and below, and after concrete is poured into the steel tube, the cavity prefabricated concrete-filled steel tube column is formed. And in the centrifugal rotation process of the steel pipe, the internal concrete naturally forms a through cavity in the axial direction in the center position of the concrete, the defect that the construction quality of a traditional steel pipe concrete column cannot be guaranteed can be effectively overcome, and the construction method is safe, reliable and easy and convenient to operate.
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Description

Technical Field

[0001] The present invention relates to the technical field of steel-concrete structure construction, and more particularly to a novel prefabricated hollow steel tube concrete column and a manufacturing method thereof. Background Art

[0002] When pouring concrete inside traditional steel tube (round steel tube and square steel tube) concrete columns, the commonly used construction techniques include pumping jacking pouring, high-position drop pouring and conduit construction pouring. These three construction techniques will cause the concrete inside the steel tube to be poured loosely, with local cavities and other quality problems. At the same time, the concrete pouring quality at the connection node between the steel tube column and the steel beam also faces the above problems. Summary of the Invention

[0003] In response to the problems existing in the prior art, the purpose of the present invention is to provide a new type of hollow prefabricated steel tube concrete column and its manufacturing method, which can effectively eliminate the disadvantages of the above-mentioned traditional steel tube concrete column that cannot guarantee the construction quality. The construction method is safe, reliable and easy to operate.

[0004] The present invention adopts the following technical solutions:

[0005] A new type of cavity prefabricated steel tube concrete column includes a steel tube and a concrete layer. The concrete layer is located inside the steel tube. A through cavity is provided in the middle of the concrete layer. The head and tail of the cavity prefabricated steel tube concrete column are welded to the beam-column nodes above and below.

[0006] Furthermore, when the hollow prefabricated steel tube concrete column is welded to the upper and lower beam-column joints, the cavity of the concrete layer remains hollow.

[0007] Furthermore, the steel pipe is cylindrical or square, and the maximum cross-sectional dimension of the steel pipe is not greater than 800 mm.

[0008] The present invention discloses a novel method for manufacturing a prefabricated hollow steel tube concrete column, which comprises the following steps: after concrete is poured into the interior of the steel tube, the steel tube is centrifugally rotated around the axial direction. During the centrifugal rotation of the steel tube, the internal concrete naturally forms an axially penetrating cavity at the center of the concrete.

[0009] Furthermore, after the prefabricated hollow steel tube concrete column is welded and installed with the beam-column joint, grouting material or cement slurry is injected through the bottom hole to fill it.

[0010] Furthermore, high-strength grouting material or cement slurry with micro-expansion effect is injected through the bottom hole by a high-pressure grouting machine.

[0011] Furthermore, the grouting material or cement slurry flows upward step by step through the cavity of the steel pipe column and fills the cavity and the hollow space area inside the beam-column joint.

[0012] Furthermore, after all the internal cavities of the steel pipe columns and the internal spaces of the beam-column joint areas within the entire height range of the upper and lower buildings are filled, the bottom grouting holes are welded and sealed to complete the construction.

[0013] Beneficial effects

[0014] The present invention adopts factory centrifugal prefabrication and production. Its production process and equipment are basically consistent with the existing prefabricated pipe pile (PHC) production, with fast production speed, guaranteed quality and lower cost.

[0015] The internal cavity and the space at the beam-column joint position of the present invention are all constructed by high-pressure grouting, which can effectively ensure the internal density and fullness, and avoid the occurrence of poor quality defects such as cavities, holes, and honeycombs;

[0016] The micro-expansion grouting material or cement slurry injected under high pressure will expand slightly during the hardening process, which can make the internal concrete and the steel pipe wall fit more closely, avoiding the thermal expansion and contraction of the steel pipe wall and the voiding of concrete caused by the temperature difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a new type of hollow prefabricated steel tube concrete column according to an embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional view of a novel hollow prefabricated steel tube concrete column according to an embodiment of the present invention;

[0019] Figure 3 This is a construction diagram of an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the centrifugal production of a novel hollow prefabricated steel tube concrete column according to one embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] As shown in the figure, the present invention discloses a novel prefabricated hollow steel tube concrete-filled column, comprising a steel tube 1 and a concrete layer 2. The concrete layer 2 is located within the steel tube 1, and a hollow cavity 3 is defined in the middle of the concrete layer 2. The head and tail of the hollow steel tube concrete-filled column are welded to the upper and lower beam-column nodes 4. The locations of the head and tail of the novel hollow steel tube concrete-filled column do not include the locations of the beam-column nodes 4; the specific locations should be determined in conjunction with the drawings.

[0023] In one embodiment of the present invention, when the prefabricated hollow steel tube concrete column is welded to the upper and lower beam-column nodes, concrete is temporarily not poured inside the cavity 3, and the cavity 3 of the concrete layer 2 remains hollow.

[0024] In one embodiment of the present invention, the steel pipe 1 is cylindrical or square, the maximum cross-sectional dimension of the steel pipe is not greater than 800 mm, and there is no restriction on the strength of the internal concrete.

[0025] The present invention also discloses a novel method for manufacturing a prefabricated hollow steel tube concrete column, which comprises the following steps: according to the drawings and in combination with the factory equipment conditions, cutting a steel tube 1 of appropriate size according to the drawings and welding it to form the steel tube 1; after concrete is poured into the steel tube 1, centrifugal rotation is performed around the axial direction; during the centrifugal rotation of the steel tube, a cavity 3 running through the axial direction is naturally formed at the center of the concrete.

[0026] A certain amount of concrete is poured into the steel pipe 1 and the ports on both sides are blocked to prevent the internal concrete from flowing out.

[0027] During centrifugal rotation, the centrifugal production is stopped after the cavity 3 is formed inside, and the product is transferred to a high-pressure and high-temperature steam curing furnace for curing.

[0028] In one embodiment of the present invention, after the prefabricated hollow steel tube concrete column is welded and installed with the beam-column joint, grouting material or cement slurry is injected through the bottom hole 5 to fill it.

[0029] In one embodiment of the present invention, a high-strength grouting material or cement slurry with a micro-expansion effect is injected through the bottom hole 5 by a high-pressure grouting machine 6 for filling.

[0030] In one embodiment of the present invention, the grouting material or cement slurry flows upward step by step through the cavity of the steel pipe column and fills the cavity and the hollow space area inside the beam-column joint.

[0031] In one embodiment of the present invention, after the internal cavities of the steel pipe columns and the internal spaces of the beam-column joint areas within the entire building height range are completely filled, the bottom grouting holes are welded and sealed to complete the construction.

[0032] Specifically, the cured new type of hollow prefabricated steel tube concrete column is transported to the site and welded on site with the upper and lower beam-column node steel components. A high-pressure grouting machine is used to inject grouting material or cement slurry with a micro-expansion effect from the bottom hole of the hollow prefabricated steel tube concrete column until the grouting material or cement slurry completely fills the internal cavity of the steel tube column and the internal space of the beam-column node. Finally, the bottom hole of the hollow prefabricated steel tube concrete column grouting is sealed by steel plate welding to complete the construction.

[0033] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A new type of prefabricated hollow steel tube concrete column, characterized by: It includes steel pipes and concrete layers. The concrete layer is located inside the steel pipe. A through cavity is provided in the middle of the concrete layer. The head and tail of the cavity prefabricated steel pipe concrete column are welded to the beam-column nodes above and below.

2. The novel prefabricated hollow steel tube concrete column according to claim 1 is characterized in that: When the cavity prefabricated steel tube concrete column is welded to the beam-column joints above and below, the three cavities in the concrete layer remain hollow.

3. The novel prefabricated hollow steel tube concrete column according to claim 1 is characterized in that: The steel pipe is cylindrical or square, and the maximum cross-sectional dimension of the steel pipe is not greater than 800mm.

4. A novel method for manufacturing a prefabricated hollow steel tube concrete column, characterized by: After concrete is poured into the steel pipe, it is centrifugally rotated around the axial direction. During the centrifugal rotation of the steel pipe, an axially penetrating cavity is naturally formed at the center of the concrete.

5. The method for manufacturing a novel prefabricated hollow steel tube concrete column according to claim 4, characterized in that: After the prefabricated hollow steel tube concrete column is welded and installed at the beam-column joint, grouting material or cement slurry is injected through the bottom hole to fill it.

6. The novel prefabricated hollow steel tube concrete column according to claim 5, characterized in that: High-strength grouting material or cement slurry with micro-expansion effect is injected through the bottom hole by a high-pressure grouting machine.

7. The novel prefabricated hollow steel tube concrete column according to claim 5, characterized in that: The grouting material or cement slurry flows upward step by step through the cavity of the steel pipe column and fills the cavity and the hollow space area inside the beam-column joint.

8. The novel prefabricated hollow steel tube concrete column according to claim 5, characterized in that: After the internal cavities of the steel pipe columns and the internal spaces of the beam-column joint areas within the entire height range of the upper and lower buildings are completely filled, the bottom grouting holes are welded and sealed to complete the construction.