Reliable steel structure anti-corrosion and fireproof protection structure

Abstract

The utility model discloses a reliable anti-corrosion and fireproof protection structure for a steel structure, which belongs to the technical field of building structures, comprises the steel structure, and is characterized in that angle steel is mounted on the outer surface of the periphery of the steel structure and is fixed on the outer surface of the steel structure in a welding manner; angle steel is arranged on the outer wall of the steel structure, a steel plate pull net is installed on the angle steel in a welding mode, a formwork is arranged on the periphery of the outer wall of the steel plate pull net in a surrounding mode, and a filling layer used for corrosion prevention and fire prevention is poured between the formwork and the outer wall of the steel structure. Therefore, the overall stability of the filling layer is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of building structure construction, and more specifically relates to a reliable steel structure anti-corrosion and fire protection structure. Background Art

[0002] In traditional steel structure anti-corrosion and fire-proofing construction, anti-corrosion paint and fire-retardant paint are sprayed on the surface of steel components. However, they have poor durability and generally fall off in about 5-8 years, causing great safety hazards and affecting the appearance.

[0003] At present, the Chinese utility model patent with the announcement number CN217998926U discloses a protective structure for fire protection and corrosion prevention of steel structure columns in subway stations. The protective structure includes an outer formwork, connecting parts and a filling layer. The formwork parts are connected to form a tubular structure. The tubular structure surrounds the periphery of the steel structure column, and a filling layer is provided between the tubular structure and the steel structure column.

[0004] In the prior art, a protective structure similar to the above-mentioned one for fire protection and corrosion prevention of steel columns in subway stations directly casts a filling layer between the tubular structure and the steel column, which may lead to uneven strength distribution of the cast filling layer and affect the bearing capacity of the overall structure. During the casting process of the filling layer, cracks may be generated due to temperature changes, shrinkage or uneven settlement, affecting the durability and appearance of the structure. Although the outer layer formwork does not need to be dismantled to solve the aesthetic problem, it is not convenient for the later maintenance of the filling layer. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a reliable steel structure anti-corrosion and fire protection structure, which has the advantage of being able to control the width and number of cracks, thereby improving the overall stability of the filling layer.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A reliable steel structure anti-corrosion and fire protection structure includes a steel structure, angle steels are installed on the outer surface of the steel structure, the angle steels are fixed to the outer surface of the steel structure by welding, a steel plate mesh is installed on the angle steel by welding, a supporting formwork is provided around the outer wall of the steel plate mesh, and a filling layer for anti-corrosion and fire prevention is cast between the inner wall and the outer wall of the steel structure.

[0008] The advantages of this solution are at least that: through the arrangement of angle steel, steel plate mesh and filling layer, when the steel structure needs to be treated with corrosion and fire prevention, the angle steel is first fixed to the outer surface of the steel structure by welding, and then the steel plate mesh is welded on the angle steel, and the steel plate mesh is fixed around the outer surface of the steel structure. After completing the above actions, the supporting formwork is installed around the outer wall of the steel plate mesh, and then the corrosion and fire prevention filling layer is poured between the inner wall of the supporting formwork and the outer wall of the steel structure. Through the above technical solution, compared with the prior art of directly arranging the supporting formwork around the steel structure and pouring the corrosion and fire prevention filling layer, the crack resistance of the filling layer can be effectively enhanced and the durability and tensile strength of the filling layer can be improved, and the overall stability of the filling layer can also be improved.

[0009] The utility model is further configured as follows: the filling layer is an anti-corrosion and fireproof layer cast with C20 fine stone concrete, and the thickness of the filling layer is 10 cm.

[0010] The advantages of this solution are at least as follows: C20 fine aggregate concrete has high fire resistance and corrosion resistance, and C20 fine aggregate concrete has moderate strength and can provide good structural support, thereby ensuring the overall stability of the filling layer.

[0011] The utility model is further configured as follows: the thickness of the steel plate stretched net is 3 mm, meshes are provided on the steel plate stretched net, and the size of the meshes is 20x40 mm.

[0012] The advantages of this solution are at least that the meshed steel plate increases the contact area with the filling layer, thereby increasing the bonding force between the two, which can effectively disperse the stress applied to the filling layer, control the width and number of cracks, and thus improve the overall stability, durability and aesthetics of the filling layer.

[0013] The present invention is further configured as follows: the angle steel is provided with multiple layers on the outer wall of the steel structure, and at least four are provided on each layer. The angle steel is preferably an angle steel with a side length of 25 mm, a thickness of 3 mm, and a vertical length of 40 mm.

[0014] The advantages of this solution are at least that: multiple layers of angle steels are set on the outer wall of the steel structure, which can provide more connection points between the steel plate mesh and the steel structure, facilitating the connection between the steel plate mesh and the steel structure. There are at least four angle steels on each layer. The setting of four angle steels can effectively disperse and bear the load, enhance the stability of the overall structure, and reduce the deformation and tilting of the steel plate mesh.

[0015] The utility model is further configured as follows: the distance between the inner side wall of the supporting formwork and the outer surface of the steel structure is 100 mm, and the steel plate mesh is located in the middle position between the inner side wall of the supporting formwork and the outer surface of the steel structure.

[0016] The advantages of this solution are at least that the steel plate mesh is located between the inner wall of the support formwork and the outer surface of the steel structure, which can effectively prevent the support formwork from tilting or shifting due to uneven force during the pouring process of the filling layer.

[0017] The utility model is further configured as follows: the distance between the top surface and the bottom surface of the two adjacent layers of angle steel is 600 mm.

[0018] The advantage of this solution is at least that the spacing can reduce the number of angle steels while ensuring the stability of the steel plate mesh, thereby saving installation time.

[0019] In summary, the present invention has at least the following advantages:

[0020] 1. By setting up angle steel, steel plate mesh and filling layer, when the steel structure needs to be treated with anti-corrosion and fire prevention, the angle steel is first fixed to the outer surface of the steel structure by welding, and then the steel plate mesh is welded on the angle steel. The steel plate mesh is fixed around the outer surface of the steel structure. After completing the above actions, a support formwork is installed around the outer wall of the steel plate mesh, and then the anti-corrosion and fireproof filling layer is poured between the inner wall of the support formwork and the outer wall of the steel structure. Through the above technical solution, compared with the prior art of directly setting up a support formwork around the steel structure and pouring the anti-corrosion and fireproof filling layer, the crack resistance of the filling layer can be effectively enhanced and the durability and tensile strength of the filling layer can be improved. At the same time, the overall stability of the filling layer can also be improved.

[0021] 2. By setting up a mesh, the steel plate with mesh increases the contact area with the filling layer, thereby increasing the bonding force between the two, which can effectively disperse the stress applied to the filling layer, control the width and number of cracks, and thus improve the overall stability, durability and aesthetics of the filling layer;

[0022] 3. Setting multiple layers of angle steel on the outer wall of the steel structure can provide more connection points between the steel plate mesh and the steel structure, facilitating the connection between the steel plate mesh and the steel structure. There are at least four angle steels on each layer. The setting of four angle steels can effectively disperse and bear the load, enhance the stability of the overall structure, and reduce the deformation and tilt of the steel plate mesh. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the overall embodiment;

[0024] Figure 2 It is a top view of this embodiment;

[0025] Figure 3 for Figure 2 Schematic diagram of the partial cross-section of the AA surface.

[0026] Figure numerals: 1. Steel structure; 2. Angle steel; 3. Steel plate mesh; 4. Support formwork; 5. Filling layer. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below with reference to the accompanying drawings.

[0028] A reliable steel structure anti-corrosion and fire protection structure, such as Figure 1 、 Figure 2 As shown, it includes a steel structure 1, wherein the steel structure 1 can be a steel pipe column, a steel column, an I-shaped steel column, etc. Figure 1 What is shown is a steel pipe column. Angle steel 2 is installed on the outer surface of the steel structure 1. The angle steel 2 is fixed to the outer surface of the steel structure 1 by welding. A steel plate mesh 3 is installed on the angle steel 2 by welding. A supporting formwork 4 is provided around the outer wall of the steel plate mesh 3. A filling layer 5 for corrosion prevention and fire prevention is poured between the inner wall of the supporting formwork 4 and the outer wall of the steel structure 1.

[0029] The supporting formwork 4 can be a plate made of metal such as steel, wood board or other materials. The supporting formwork 4 is connected together by bolts, clamps or plug-in. The filling layer 5 is an anti-corrosion and fire-proof layer cast with C20 fine stone concrete. The thickness of the filling layer 5 is 10 cm.

[0030] like Figure 2 As shown in FIG. 3 , in a preferred embodiment, the spacing between the inner sidewall of the formwork 4 and the outer surface of the steel structure 1 is 100 mm, and the steel mesh 3 is positioned intermediate the inner sidewall of the formwork 4 and the outer surface of the steel structure 1. It is worth noting that the steel mesh 3 is 3 mm thick and has a mesh size of 20 x 40 mm.

[0031] In order to improve the stability of the connection between the steel structure 1 and the steel plate mesh 3, in a preferred embodiment, multiple layers of angle steel 2 are provided on the outer wall of the steel structure 1, and at least four are provided on each layer. The angle steel 2 is preferably an angle steel 2 with a side length of 25 mm, a thickness of 3 mm, and a vertical length of 40 mm. The distance between the top and bottom surfaces of the upper and lower adjacent layers of angle steel is 600 mm.

[0032] The working process and beneficial effects of the utility model are as follows:

[0033] When the steel structure 1 needs to be treated with anti-corrosion and fireproofing, the angle steel 2 is first fixed to the outer surface of the steel structure 1 by welding, and then the steel plate mesh 3 is welded to the angle steel 2. The steel plate mesh 3 is fixed around the outer surface of the steel structure 1. After completing the above actions, the support formwork 4 is installed around the outer wall of the steel plate mesh 3. The distance between the inner wall of the support formwork 4 and the outer surface of the steel structure 1 is 100mm. Then, an anti-corrosion and fireproof filling layer 5 is poured between the inner wall of the support formwork 4 and the outer wall of the steel structure 1. Through the above technical solution, compared with the prior art of directly setting the support formwork 4 around the steel structure 1 and pouring the anti-corrosion and fireproof filling layer 5, the crack resistance of the filling layer 5 can be effectively enhanced and the durability and tensile strength of the filling layer 5 can be improved, while the overall stability of the filling layer 5 can also be improved.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present invention should be included in the scope of protection of the present invention.

Claims

1. A reliable steel structure anti-corrosion and fire protection structure, comprising a steel structure (1), characterized in that: Angle steels (2) are installed on the outer surfaces of the four sides of the steel structure (1), and the angle steels (2) are fixed to the outer surface of the steel structure (1) by welding. A steel plate mesh (3) is installed on the angle steels (2) by welding. A support formwork (4) is provided around the outer wall of the steel plate mesh (3), and a filling layer (5) for corrosion prevention and fire prevention is poured between the inner wall of the support formwork (4) and the outer wall of the steel structure (1).

2. A reliable steel structure anti-corrosion and fire protection structure according to claim 1, characterized in that: The filling layer (5) is an anti-corrosion and fireproof layer cast with C20 fine stone concrete, and the thickness of the filling layer (5) is 10 cm.

3. A reliable steel structure anti-corrosion and fire protection structure according to claim 1, characterized in that: The thickness of the steel plate stretched net (3) is 3 mm, and meshes are provided on the steel plate stretched net (3), and the size of the meshes is 20x40 mm.

4. A reliable steel structure anti-corrosion and fire protection structure according to claim 3, characterized in that: The angle steel (2) is provided in multiple layers on the outer wall of the steel structure (1), and at least four angle steels are provided in each layer. The angle steel (2) has a side length of 25 mm, a thickness of 3 mm, and a vertical length of 40 mm.

5. A reliable steel structure anti-corrosion and fire protection structure according to claim 1, characterized in that: The distance between the inner side wall of the supporting formwork (4) and the outer surface of the steel structure (1) is 100 mm, and the steel plate mesh (3) is located between the inner side wall of the supporting formwork (4) and the outer surface of the steel structure (1) after being welded with the angle steel (2).

6. A reliable steel structure anti-corrosion and fire protection structure according to claim 4, characterized in that: The distance between the top surface and the bottom surface of the angle steel of the upper and lower adjacent layers is 600mm.

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