Interpolation conversion type rigid anti-corrosion column base structure for aluminum alloy

Abstract

Provided is an interpolation conversion type rigid anti-corrosion column base structure for aluminum alloy. The lower end of the aluminum alloy column is inserted into the outer cylinder, and after the upper end of the outer cylinder is fixedly connected with the aluminum alloy column in a positioned manner, the lower end part of the aluminum alloy column is suspended in the outer cylinder. A connection protective layer is wrapped at the positioned connection part between the outer cylinder and the aluminum alloy column. A positioning anti-corrosion layer for isolating the aluminum alloy column and the outer cylinder is poured between the inserted part of the aluminum alloy column and the outer cylinder and at the lower end of the aluminum alloy column. The steel bar mesh connected to the outer cylinder and the aluminum alloy column is distributed on the outer periphery of the outer cylinder, and a plurality of anchoring studs located within the steel bar mesh are evenly distributed on the outer wall of the outer cylinder. The steel bar mesh is connected to the upper end of the column base reinforcement bar, and the lower end of the column base reinforcement bar is cast integrally with the foundation. The present invention solves the anti-corrosion problem that the aluminum alloy column is prone to electrochemical corrosion in the alkaline environment of the foundation, has a clear force transmission route, and has strong ability to prevent electrochemical corrosion in the alkaline environment, enabling the aluminum alloy column to meet the anti-corrosion requirements while satisfying the force transmission function.

Description

Technical Field

[0001] The present invention belongs to the technical field of steel structure anti-corrosion, and particularly relates to an inserted conversion type aluminum alloy rigid anti-corrosion column base structure. Background Art

[0002] Aluminum alloy materials have many good material properties such as good moldability, low carbon environmental protection, and strong durability. This material has both strength performance to meet the structural requirements, and strong corrosion resistance and extremely high recycling performance, and has good application prospects in the fields of municipal engineering, architecture, etc. However, its poor alkali corrosion resistance limits the application of aluminum alloy materials in building structures. In addition, the design of aluminum alloy structural column bases lacks relatively complete national, industrial and local technical standards, and there is no design experience for reference.

[0003] The column base system is a force transmission device connecting the upper structure and the foundation. The column base of the aluminum alloy frame column must adopt the form of an externally wrapped rigid column base according to the design requirements, and must meet the requirements of compression resistance, tensile resistance, shear resistance, and anti-overturning; the concrete material used for the externally wrapped column base is usually alkaline, and aluminum alloy materials are prone to electrochemical corrosion in an alkaline environment. Therefore, the design requirements of the column base stipulate that the outer skin of the aluminum alloy column cannot be in direct contact with the alkaline concrete. That is, while the aluminum alloy column base meets the force transmission function, it should also meet the anti-corrosion requirements of the aluminum alloy column base. Meeting the structural force transmission and component anti-corrosion is the technical difficulty in the design of this type of column base. Therefore, in order to solve the above problems, it is necessary to propose improvements. Summary of the Invention

[0004] The technical problem solved by the present invention is to provide an inserted conversion type aluminum alloy rigid anti-corrosion column base structure. Through an outer cylinder that isolates and is fixedly connected to the aluminum alloy column, the connection between the aluminum alloy column and the base forms an inserted conversion type structure, solving the anti-corrosion problem of electrochemical corrosion that is prone to occur in the aluminum alloy column in the basic alkaline environment. The force transmission route is clear, and the ability to prevent electrochemical corrosion in the alkaline environment is strong. While the aluminum alloy column meets the force transmission function, it also meets the anti-corrosion requirements of the aluminum alloy column, filling the blank in the anti-corrosion design of the column base of the aluminum alloy frame structure. The structure is simple, the overall strength is good, and it has good promotion value.

[0005] Technical solution adopted by the present invention: An interpolation conversion type rigid anti-corrosion aluminum alloy column base structure, including an aluminum alloy column and an outer cylinder fixedly connected to the foundation at the lower end. The lower end of the aluminum alloy column is inserted into the outer cylinder, and after the upper end of the outer cylinder is positioned and fixedly connected to the aluminum alloy column, the lower end of the aluminum alloy column is suspended in the outer cylinder. A connection protection layer is wrapped around the position where the outer cylinder is positioned and fixedly connected to the aluminum alloy column. A positioning anti-corrosion layer for isolating the aluminum alloy column and the outer cylinder is poured between the inserted parts of the aluminum alloy column and the outer cylinder and at the lower end of the aluminum alloy column. A steel bar mesh connected to the outer cylinder and the aluminum alloy column is distributed on the outer periphery of the outer cylinder, and a plurality of anchoring studs evenly distributed on the outer wall of the outer cylinder are located inside the steel bar mesh. The steel bar mesh is connected to the upper end of the column base reinforcement bars, and the lower end of the column base reinforcement bars is cast integrally with the foundation.

[0006] Among them, the positioning anti-corrosion layer includes a horizontal limiting plate, a vertical limiting plate and an anti-corrosion layer. A horizontal limiting plate is fixed on the inner wall of the lower end of the aluminum alloy column, and the vertical limiting plate fixed on the inner bottom surface of the lower end of the outer cylinder is located below and to the middle of the horizontal limiting plate. An anti-corrosion layer for isolating the inserted parts of the outer cylinder and the aluminum alloy column is filled between the horizontal limiting plate and the inner bottom surface of the lower end of the outer cylinder and between the inner wall of the outer cylinder and the outer wall of the aluminum alloy column.

[0007] Further, the anti-corrosion layer adopts a non-alkali grouting material, among which, the non-alkali grouting material is JGN building structure glue.

[0008] Further, a plurality of glue injection holes are made on the side wall of the outer cylinder, and the non-alkali grouting material is injected into the area between the outer cylinder and the aluminum alloy column through the glue injection holes.

[0009] Further, a reserved adjustment gap a for limiting is provided between the bottom surface of the horizontal limiting plate and the lower end of the aluminum alloy column, and the range of the adjustment gap a is 18mm ≤ a ≤ 25mm.

[0010] Further, the outer cylinder is an inverted T-shaped structure composed of a cylinder body and a bottom plate fixed to the lower end of the cylinder body. The bottom plate and the lower end of the steel bar mesh are both fixedly connected to the anchor bolts cast in the foundation.

[0011] Further, a plurality of angle steels are fixed on the outer wall of the upper end of the outer cylinder, and the angle aluminum located above the angle steel is fixed on the aluminum alloy column. An isolation layer for adjusting the internal stress of the contact surface between the angle steel and the angle aluminum is provided between the horizontal plates of the angle steel and the angle aluminum. After the angle steel, the angle aluminum and the isolation layer are fixedly connected into a whole through connecting bolts, the positioning and fixed connection between the outer cylinder and the aluminum alloy column is realized.

[0012] Further, the isolation layer adopts a flexible polytetrafluoroethylene isolation layer.

[0013] Further, the connecting protective layer includes a non-alkaline isolation layer, a polymer waterproof layer, and a C25 concrete protective layer. The non-alkaline isolation layer is adhesively wrapped around the outer periphery of the position where the outer cylinder is positioned and fixedly connected to the aluminum alloy column. After the three polymer waterproof layers and C25 are adhered to the non-alkaline isolation layer, they are wrapped by the C25 concrete protective layer to form a connecting protective layer.

[0014] Further, the non-alkaline isolation layer is an SBS coil.

[0015] Advantages of the present invention compared with the prior art:

[0016] 1. In this technical solution, through the outer cylinder that isolates and is positioned and fixedly connected to the aluminum alloy column, the connection between the aluminum alloy column and the base forms an inserted conversion structure, solving the anti-corrosion problem of electrochemical corrosion that is prone to occur in the aluminum alloy column in the basic alkaline environment and meeting the design requirements of the aluminum alloy rigidity.

[0017] 2. The force transmission route of this technical solution is clear. It adopts the method of inserting the aluminum alloy column into the stainless steel outer cylinder that is reliably connected to the foundation for conversion, so that the wall of the aluminum alloy column does not contact the alkaline concrete environment, optimizing the ability of the aluminum alloy column to prevent electrochemical corrosion in the alkaline environment. While the aluminum alloy column meets the force transmission function, it also meets the anti-corrosion requirements of the aluminum alloy column, filling the gap in the anti-corrosion design of the column foot of the aluminum alloy frame structure.

[0018] 3. This technical solution tightly nests the aluminum alloy column and the stainless steel outer cylinder together, uses the welded anchor studs on the stainless steel outer cylinder to be anchored into the concrete, and connects the stainless steel outer cylinder with the column foot reinforcement in the foundation to meet the requirements of the anchoring and connection of the stainless steel outer cylinder, making the outer cylinder, the aluminum alloy column, and the foundation connected into a reliable overall structure and improving the support reliability of the aluminum alloy column.

[0019] 4. This technical solution has a simple structure, novel design, good overall strength, and the outer cylinder effectively has good promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] The following will combine the Figure 1 in the embodiments of the present invention, and clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] It should be noted that in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0023] The interpolation conversion type rigid anti-corrosion aluminum alloy column base structure includes an aluminum alloy column 1 and an outer cylinder 2 fixedly connected to the foundation 3 at the lower end. The lower end of the aluminum alloy column 1 is inserted into the outer cylinder 2, and after the upper end of the outer cylinder 2 is positioned and fixedly connected to the aluminum alloy column 1, the lower end portion of the aluminum alloy column 1 is suspended in the outer cylinder 2. A connection protective layer 14 is wrapped at the positioning and fixed connection part between the outer cylinder 2 and the aluminum alloy column 1. A positioning anti-corrosion layer for isolating the aluminum alloy column 1 and the outer cylinder 2 is poured between the inserted part of the aluminum alloy column 1 and the outer cylinder 2 and at the lower end of the aluminum alloy column 1. The steel bar mesh 7 connected to the outer cylinder 2 and the aluminum alloy column 1 is distributed on the outer periphery of the outer cylinder 2, and several anchor bolts 6 located inside the steel bar mesh 7 are evenly distributed on the outer wall of the outer cylinder 2. Finally, the anchor bolts 6 are anchored into the concrete. The steel bar mesh 7 is connected to the upper end of the column base reinforcing bar 8, and the lower end of the column base reinforcing bar 8 is cast integrally with the foundation 3. In the above structure, through the outer cylinder 2 that is isolated and positioned and fixedly connected to the aluminum alloy column 1, the connection between the aluminum alloy column 1 and the base 3 forms an interpolation conversion type structure, solving the anti-corrosion problem of the aluminum alloy column 1 being prone to electrochemical corrosion in the alkaline environment of the foundation 3 and meeting the design requirements of aluminum alloy rigidity; the force transmission route is clear, and the conversion is carried out by inserting the aluminum alloy column 1 into the stainless steel outer cylinder 2 that is reliably connected to the foundation 3, so that the wall of the aluminum alloy column 1 does not contact the alkaline concrete environment, optimizing the ability of the aluminum alloy column 1 to prevent electrochemical corrosion in the alkaline environment, enabling the aluminum alloy column 1 to meet the anti-corrosion requirements while satisfying the force transmission function, filling the gap in the anti-corrosion design of the column base of the aluminum alloy frame structure.

[0024] The positioning anti-corrosion layer is as follows: The positioning anti-corrosion layer includes a horizontal limiting plate 4, a vertical limiting plate 5 and an anti-corrosion layer. A horizontal limiting plate 4 is fixed on the inner wall of the lower end of the aluminum alloy column 1, and the vertical limiting plate 5 fixed on the inner bottom surface of the lower end of the outer cylinder 2 is located below the horizontal limiting plate 4. An anti-corrosion layer 16 for isolating the inserted part of the outer cylinder 2 and the aluminum alloy column 1 is filled between the horizontal limiting plate 4 and the inner bottom surface of the lower end of the outer cylinder 2 and between the inner wall of the outer cylinder 2 and the outer wall of the aluminum alloy column 1. Specifically, the anti-corrosion layer 16 uses a non-alkaline grouting material. Among them, the non-alkaline grouting material is JGN building structure glue. Generally, JGN building structure glue is used for bonding and is not used for creating a non-alkaline environment. Through practice, the anti-corrosion effect is very ideal. Specifically, a plurality of glue injection holes 15 are formed on the side wall of the outer cylinder 2, and the non-alkaline grouting material is injected into the area between the outer cylinder 2 and the aluminum alloy column 1 through the glue injection holes 15, so as to isolate the aluminum alloy column 1 and the stainless outer cylinder 2 and prevent the aluminum alloy column 1 from undergoing electrochemical corrosion. Specifically, a reserved adjustment gap a for limiting is provided between the bottom surface of the horizontal limiting plate 4 and the lower end of the aluminum alloy column 1, and the range of the adjustment gap a is 18mm ≤ a ≤ 25mm. The specific adjustment gap a can be selected as 20mm.

[0025] The specific structure of the outer cylinder 2 is as follows: The outer cylinder 2 is an inverted T-shaped structure composed of a cylinder body 2-1 and a bottom plate 2-2 fixed to the lower end of the cylinder body 2-1. Both the bottom plate 2-2 and the lower end of the steel bar mesh 7 are fixedly connected to the anchor bolts 9 cast in the foundation 3.

[0026] The positioning and fixed connection structure between the outer cylinder 2 and the aluminum alloy column 1 is as follows: A plurality of angle steels 10 are fixed on the outer wall of the upper end of the outer cylinder 2, and an angle aluminum 11 located above the angle steels 10 is fixed on the aluminum alloy column 1. An isolation layer 12 for adjusting the internal stress of the contact surface connection between the angle steels 10 and the angle aluminum 11 is provided between the horizontal plates of the angle steels 10 and the angle aluminum 11. After the angle steels 10, the angle aluminum 11 and the isolation layer 12 are fixedly connected into one body by connecting bolts 13, the positioning and fixed connection between the outer cylinder 2 and the aluminum alloy column 1 is realized. Specifically, the isolation layer 12 uses a flexible polytetrafluoroethylene isolation layer. Among them, a 4mm-thick flexible polytetrafluoroethylene isolation layer is used to adjust the internal stress of the contact surface between the angle steel and the angle aluminum, and the angle steels 10 and the angle aluminum 11 ensure the reliable fixed connection between the outer cylinder 2 and the aluminum alloy column 1 and are also used for force transmission and shear resistance. The angle aluminum 11 is welded on the side of the aluminum alloy column 1, and the angle steel 10 is welded on the side of the stainless steel outer cylinder 2. The shear-resistant angle steel 10 and the shear-resistant angle aluminum 11 of the conversion device are bolted by stainless steel connecting bolts 13 to transmit the internal force at the column end and meet the formation of the force transmission system between the upper structure and the foundation.

[0027] The specific structure for connecting the protective layer 14 is as follows: The connecting protective layer 14 includes a non-alkaline isolation layer, a polymer waterproof layer, and a C25 concrete protective layer. The non-alkaline isolation layer is adhesively wrapped around the outer periphery of the positioning and fixed connection position between the outer cylinder 2 and the aluminum alloy column 1. After the three polymer waterproof layers and C25 are adhered to the non-alkaline isolation layer, they are wrapped by the C25 concrete protective layer to form the connecting protective layer 14. Specifically, the non-alkaline isolation layer is an SBS coil.

[0028] In the 3D model, it is assumed that the thickness of the bottom plate, the diameter of the uplift anchor bolts, and the size of the shear keys are checked according to the box-type outer-wrapped column base. After force calculation, the "inserted conversion type" anti-corrosion rigid column base of the aluminum alloy fully meets the actual use requirements.

[0029] This technical solution tightly nests the aluminum alloy column 1 and the stainless steel outer cylinder 2 together. The anchor studs 6 welded on the stainless steel outer cylinder 2 are anchored into the concrete, and the stainless steel outer cylinder 2 is connected to the column foot reinforcement 8 in the foundation 3, meeting the requirements for the anchoring and connection of the stainless steel outer cylinder 2, making the outer cylinder 2, the aluminum alloy column 1, and the foundation 3 connected into a reliable overall structure, improving the support reliability of the aluminum alloy column 1; with a simple structure, novel design, good overall strength, and the outer cylinder effectively has good popularization value.

[0030] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0031] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. The interpolation conversion type aluminum alloy rigid anti-corrosion column base structure is characterized in that: It includes an aluminum alloy column (1) and an outer cylinder (2) whose lower end is fixedly connected to the foundation (3). The lower end of the aluminum alloy column (1) is inserted into the outer cylinder (2), and after the upper end of the outer cylinder (2) is positioned and fixedly connected to the aluminum alloy column (1), the lower end part of the aluminum alloy column (1) is suspended in the outer cylinder (2). A connection protection layer (14) is wrapped at the position where the outer cylinder (2) is positioned and fixedly connected to the aluminum alloy column (1). A positioning anti-corrosion layer for isolating the aluminum alloy column (1) and the outer cylinder (2) is poured between the inserted part of the aluminum alloy column (1) and the outer cylinder (2) and at the lower end of the aluminum alloy column (1). The steel mesh (7) connected to the outer cylinder (2) and the aluminum alloy column (1) is distributed on the outer periphery of the outer cylinder (2), and a number of anchor studs (6) evenly distributed on the outer wall of the outer cylinder (2) and located within the steel mesh (7). The upper end of the steel mesh (7) is connected to the column foot reinforcement (8), and the lower end of the column foot reinforcement (8) is cast integrally with the foundation (3); The positioning anti-corrosion layer includes a horizontal limiting plate (4), a vertical limiting plate (5) and an anti-corrosion layer. A horizontal limiting plate (4) is fixed on the inner wall of the lower end of the aluminum alloy column (1), and the vertical limiting plate (5) fixed on the inner bottom surface of the lower end of the outer cylinder (2) is located below and to the middle of the horizontal limiting plate (4). An anti-corrosion layer (16) for isolating the inserted part of the outer cylinder (2) and the aluminum alloy column (1) is filled between the horizontal limiting plate (4) and the inner bottom surface of the lower end of the outer cylinder (2) and between the inner wall of the outer cylinder (2) and the outer wall of the aluminum alloy column (1).

2. The interpolation conversion type aluminum alloy rigid anti-corrosion column base structure according to claim 1 is characterized in that: The anti-corrosion layer (16) uses non-alkali grouting material. Among them, the non-alkali grouting material is JGN building structure glue.

3. The interpolation conversion type aluminum alloy rigid anti-corrosion column base structure according to claim 2 is characterized in that: A plurality of glue injection holes (15) are made on the side wall of the outer cylinder (2), and the non-alkali grouting material is injected into the area between the outer cylinder (2) and the aluminum alloy column (1) through the glue injection holes (15).

4. The interpolation conversion type aluminum alloy rigid anti-corrosion column base structure according to claim 3 is characterized in that: A reserved adjustment gap a for limiting is provided between the bottom surface of the horizontal limiting plate (4) and the lower end part of the aluminum alloy column (1), and the range of the adjustment gap a is 18mm ≤ a ≤ 25mm.

5. The interpolation conversion type aluminum alloy rigid anti-corrosion column base structure according to claim 1 is characterized in that: The outer cylinder (2) is an inverted T-shaped structure composed of a cylinder body (2-1) and a bottom plate (2-2) fixed to the lower end of the cylinder body (2-1). The bottom plate (2-2) and the lower end of the steel mesh (7) are both fixedly connected to the anchor bolts (9) cast in the foundation (3).

6. The interpolation conversion type aluminum alloy rigid anti-corrosion column base structure according to any one of claims 1-5 is characterized in that: A plurality of angle steels (10) are fixed on the outer wall of the upper end of the outer cylinder (2), and an angle aluminum (11) located above the angle steels (10) is fixed on the aluminum alloy column (1). An isolation layer (12) for adjusting the internal stress of the contact surface connection between the angle steels (10) and the angle aluminum (11) is provided between the horizontal plates of the angle steels (10) and the angle aluminum (11). After the angle steels (10), the angle aluminum (11) and the isolation layer (12) are fixedly connected into one body through connection bolts (13), the positioning and fixed connection between the outer cylinder (2) and the aluminum alloy column (1) is realized.

7. The interpolation conversion type aluminum alloy rigid anti-corrosion column base structure according to claim 6 is characterized in that: The isolation layer (12) uses a flexible polytetrafluoroethylene isolation layer.

8. The interpolation conversion type aluminum alloy rigid anti-corrosion column base structure according to claim 1 is characterized in that: The said connection protective layer (14) includes a non-alkaline isolation layer, a polymer waterproof layer, and a C25 concrete protective layer. The non-alkaline isolation layer is adhesively wrapped around the outer periphery of the positioning and fixed connection position of the outer cylinder (2) and the aluminum alloy column (1). After the three polymer waterproof layers and C25 are adhered to the non-alkaline isolation layer, a connection protective layer (14) is formed by wrapping with the C25 concrete protective layer.

9. The interpolation conversion type aluminum alloy rigid anti-corrosion column base structure according to claim 8 is characterized in that: The non-alkaline isolation layer is an SBS coil.

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