Outer wall panel and steel structure column coating structure and construction method

Abstract

The invention relates to the technical field of building construction, in particular to an external wall panel and steel structure column coating structure and a construction method.The external wall panel and steel structure column coating structure comprises an external wall panel, a steel structure column and connecting layers, the four coating faces of the steel structure column are elastically connected with the external wall panel through PU foaming agent connecting layers, and the surface of the steel structure column is covered with a mortar base. The anti-crack layer adopts a composite design of a plurality of layers of horizontally extending glass fiber gridding cloth and inclined fiber belts, is overlapped at the internal corner in a staggered manner, and is used for dispersing stress and absorbing multi-directional shear deformation; silicone sealant and gypsum mortar double waterproof layers are arranged at the two ends of the connecting layer to block a water seepage path. A self-repairing layer is additionally arranged at the internal corner, repairing capsules containing bi-component epoxy resin are evenly dispersed in the self-repairing layer, and a repairing agent can be released under extrusion of external force to automatically fill cracks. In addition, the galvanized steel wire mesh is matched with the waterproof layer and the fireproof layer to form a rigid supporting and protecting system. According to the structure, through multiple anti-cracking barriers, elastic connection and a self-repairing mechanism, the anti-cracking performance, the waterproof sealing performance and the durability of the connecting position are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and specifically to a cladding structure and construction method for an exterior wall panel and a steel structure column. Background Art

[0002] With the continuous improvement of living standards, people's demand for residential and office buildings is increasing day by day. At present, most buildings adopt reinforced concrete structures, but the construction process of such traditional structures is cumbersome and consumes a large amount of human and material resources. At the same time, when demolishing a building with a reinforced concrete structure, destructive operations must be carried out, resulting in the building materials removed being unable to be recycled, thus causing a great waste of resources.

[0003] In view of these problems, the overall prefabricated steel structure wall has emerged, which can realize the rapid and efficient construction of the building body. In the prefabricated residential system, it is first necessary to complete the installation of the main structure framework, and then the columns are clad on the side at the connection to form a column cladding node.

[0004] After retrieval, the invention with the publication number CN205153315U proposes an overall prefabricated steel structure wall and its column cladding node, which simplifies the construction process and is convenient for installation, but it is easy to crack at the connection between the wall panel and the column. Summary of the Invention

[0005] In order to solve the problem that the connection between the existing overall prefabricated steel structure wall and its column cladding node is easy to crack, the present invention proposes a cladding structure and construction method for an exterior wall panel and a steel structure column to solve the above problems.

[0006] A cladding structure and construction method for an exterior wall panel and a steel structure column, including an exterior wall panel and a steel structure column, characterized in that: the steel structure column includes a first cladding surface, a second cladding surface, a third cladding surface, and a fourth cladding surface, and further includes a connection layer. The second cladding surface and the fourth cladding surface are connected to the exterior wall panel through the connection layer, and a mortar base is covered on the surfaces of the steel structure column and the exterior wall panel.

[0007] Furthermore, the cement mortar base provides a flat base surface and enhances the adhesion of the subsequent functional layer.

[0008] Furthermore, anti-cracking layers are provided on the surfaces of the first cladding surface and the third cladding surface, and the anti-cracking layers include multiple layers of fiberglass mesh cloth.

[0009] Furthermore, the fiberglass mesh cloth is woven from glass fibers and has high tensile strength and low elongation. When laid horizontally and extended, its grid structure can evenly disperse the tensile stress at the connection between the wall surface and the column body, avoiding cracking caused by stress concentration.

[0010] Furthermore, the fiberglass mesh extends along the surfaces of the outer wall panels on both sides in the horizontal direction. Multiple layers of fiberglass mesh are overlapped with staggering at the internal corners formed at the joints between the outer wall panels and the steel structure columns. At the internal corners, multiple layers of mesh are overlapped with staggering by 50 - 100 mm to form a stepped pattern, enhancing the crack resistance of the weak areas.

[0011] Furthermore, a fiber tape is provided between adjacent fiberglass meshes. The fiber tape is laid diagonally at an angle of 45° - 60°. Utilizing its high toughness to absorb shear forces in different directions, when the wall panel undergoes temperature deformation or structural settlement, it absorbs shear forces to prevent cracks from expanding along a single direction and enhances the crack resistance of the structure.

[0012] Furthermore, the mesh distributes stress, and the fiber tape absorbs deformation stresses in different directions through its inclined direction, further reducing the probability of crack generation.

[0013] Furthermore, the fiberglass is resistant to alkali corrosion and is suitable for a cement - based environment; the fiber tape is mostly made of polypropylene or polyester fiber, with high tensile strength and aging resistance.

[0014] Furthermore, both ends of the connection layer are covered with a sealing layer. The sealing layer includes a silicone sealant layer and a gypsum mortar layer. The silicone sealant layer has high elasticity and hydrophobicity, filling micro - gaps and forming a continuous waterproof film; the gypsum mortar serves as a rigid protective layer, covering the sealant to prevent ultraviolet aging and enhance durability.

[0015] The silicone sealant layer is located between the connection layer and the gypsum mortar layer. By filling silicone sealant and gypsum mortar, a double - layer waterproof measure is formed to prevent moisture from penetrating into the joint and enhance the overall waterproof performance.

[0016] Furthermore, the connection layer uses a PU foaming agent to fill the gap between the steel structure column and the outer wall panel to connect the steel structure column and the outer wall panel. The PU foaming agent fills the gap. After the PU foaming agent foams, it forms a closed - cell structure with a low elastic modulus, which can be compressed and deformed to absorb the displacement caused by the thermal expansion and contraction of the structure, avoiding stress cracking caused by rigid connection.

[0017] Furthermore, a self - repair layer is provided at the joint between the outer wall panel and the steel structure column. The self - repair layer completely wraps the internal corner, and repair capsules are evenly dispersed inside the self - repair layer.

[0018] Furthermore, the repair capsule includes an outer layer, an intermediate layer, and a repair layer. The outer layer is made of polyurethane or polyurea polymer material, with a thickness of 10 - 50 μm, protecting the internal repair agent from the construction environment.

[0019] Furthermore, the intermediate layer is a brittle resin layer with a thickness of 5 - 10 μm. When it is extruded by external force, it brittlely breaks, triggering the release of the repair agent to repair cracks.

[0020] Furthermore, the repair layer is a two-component epoxy resin formed by combining an epoxy prepolymer and an amine curing agent. The repair layer accounts for 60% - 80% of the mass of the repair capsule. After the epoxy prepolymer and the amine curing agent come into contact, they crosslink and cure, filling the cracks and restoring the structural integrity.

[0021] Furthermore, when the crack extends to the position of the capsule, the capsule ruptures and releases the repair agent, and the epoxy resin cures in the crack, achieving "self-repair".

[0022] Furthermore, the outer layer of the repair capsule is a polymer material protective layer. After the intermediate brittle resin layer is compressed and ruptured, it releases the two-component epoxy resin and infiltrates into the cracks, quickly curing to repair the cracks and prevent the cracks from further expanding.

[0023] Furthermore, a galvanized steel wire mesh is installed between the crack-resistant layer and the steel structure column. The mesh size is 10 - 20 mm. The galvanized layer prevents rust, and its tensile strength enhances the integrity of the covering surface and prevents the mortar layer from peeling off.

[0024] Furthermore, the galvanized steel wire mesh completely covers the first covering surface and the third covering surface, and partially covers the second covering surface and the fourth covering surface. The fiberglass mesh cloth cooperates with the galvanized steel wire mesh to form a "flexible + rigid" double crack-resistant system between the steel structure column and the exterior wall panel. The fiberglass mesh cloth provides flexible tensile strength, and the steel wire mesh enhances the rigid support, jointly inhibiting the crack expansion and reducing the probability of crack occurrence.

[0025] Furthermore, a waterproof layer is provided between the galvanized steel wire mesh and the crack-resistant layer. The waterproof layer uses a polymer cement-based coating, which contains acrylic emulsion and cement, and forms a continuous flexible film after curing, blocking the water vapor penetration path.

[0026] Furthermore, the waterproof layer completely wraps the first covering surface and extends 300 - 500 mm towards the second covering surface and the fourth covering surface. The waterproof layer extends to cover the covering surface to prevent water vapor erosion.

[0027] Furthermore, a fireproof layer is provided between the steel structure column and the galvanized steel wire mesh. The fireproof layer completely covers the first covering surface and the third covering surface, and wraps the four corners of the steel structure column.

[0028] Furthermore, a protective layer is provided between the galvanized steel wire mesh covering the third covering surface and the crack-resistant layer. The protective layer is a mortar leveling layer. The two ends of the protective layer are connected to the surface of the exterior wall panel. The mortar base provides a flat base surface and enhances the adhesion; the protective layer is a leveling layer, improving the surface durability.

[0029] Compared with the prior art, the present application has the following beneficial effects:

[0030] In the cladding structure of this application, multiple layers of fiberglass mesh are extended horizontally and lap with dislocation, combined with fiber bands arranged obliquely, which disperse the tensile stress and absorb multi-directional shear forces, effectively inhibiting the crack propagation caused by temperature deformation or structural settlement at the joints, significantly improving the crack resistance performance. At the same time, the gaps are filled with PU foaming agent to form an elastic connection layer, adapting to the thermal expansion and contraction deformation and reducing stress concentration; a double-sealing structure of silicone sealant and gypsum mortar is used to block the water penetration path and prevent cracking and corrosion problems caused by water seepage; finally, a self-repairing layer containing repair capsules is set at the internal corner. After the outer layer of the capsule is compressed and broken, the two-component epoxy resin is released, automatically filling and curing the cracks, achieving autonomous repair of the cracks, preventing the further expansion of micro-cracks, and extending the structural durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a schematic structural diagram of a cladding structure and construction method for an exterior wall panel and a steel structure column;

[0033] Figure 2 It is Figure 1 an enlarged view of part A in

[0034] Figure 3 It is Figure 1 an enlarged view of part B in

[0035] Wherein:

[0036] 1. Exterior wall panel;

[0037] 2. Steel structure column; 201. First cladding surface; 202. Second cladding surface; 203. Third cladding surface; 204. Fourth cladding surface;

[0038] 3. Mortar base;

[0039] 4. Fiberglass mesh;

[0040] 5. Galvanized steel wire mesh;

[0041] 6. Protective layer;

[0042] 7. Sealing layer;

[0043] 8. Connection layer;

[0044] 9. Fireproof layer;

[0045] 10. Self-repairing layer;

[0046] 11. Buffer layer;

[0047] 12. Waterproof layer. Detailed implementation manners

[0048] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0049] The application principle of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0050] Embodiment 1

[0051] As Figures 1-3 shown, an exterior wall panel and steel structure column cladding structure and construction method include an exterior wall panel 1 and a steel structure column 2, and are characterized in that: the steel structure column 2 includes a first cladding surface 201, a second cladding surface 202, a third cladding surface 203, a fourth cladding surface 204, and further includes a connection layer 8. The second cladding surface 202 and the fourth cladding surface 204 are connected to the exterior wall panel 1 through the connection layer 8, and a mortar base 3 is covered on the surfaces of the steel structure column 2 and the exterior wall panel 1.

[0052] An anti-cracking layer is provided on the surfaces of the first cladding surface 201 and the third cladding surface 203, and the anti-cracking layer includes multiple layers of fiberglass mesh cloth 4.

[0053] The fiberglass mesh cloth 4 extends along the horizontal direction on the surfaces of the two exterior wall panels 1 on both sides, and multiple layers of the fiberglass mesh cloth 4 are staggeredly lapped at the internal angle formed at the connection of the exterior wall panel 1 and the steel structure column 2.

[0054] A fiber tape is provided between adjacent fiberglass mesh cloth 4, and the fiber tape is inclined.

[0055] Multiple layers of fiberglass mesh cloth 4 extend along the horizontal direction and are staggeredly lapped at the internal angle, and in combination with the inclined fiber tape, a multiple anti-cracking barrier is formed.

[0056] The mesh cloth disperses stress, and the fiber tape absorbs deformation stress in different directions through the inclined direction, further reducing the probability of crack generation.

[0057] Sealing layers 7 are covered at both ends of the connection layer 8. The sealing layer 7 includes a silicone sealant layer and a gypsum mortar layer. The silicone sealant layer is located between the connection layer 8 and the gypsum mortar layer. By filling silicone sealant and gypsum mortar, a double waterproof measure is formed to prevent moisture from infiltrating into the connection, and the overall waterproof property is improved.

[0058] The connection layer 8 is filled with a PU foaming agent in the gap between the steel structure column 2 and the exterior wall panel 1 to connect the steel structure column 2 and the exterior wall panel 1. The PU foaming agent fills the gap, adapts to the thermal expansion and contraction deformation of the structure, reduces stress concentration, and avoids cracks at the connection caused by thermal expansion and contraction.

[0059] A self-repairing layer 10 is provided at the connection between the exterior wall panel 1 and the steel structure column 2. The self-repairing layer 10 completely wraps the internal corner, and repair capsules are evenly dispersed inside the self-repairing layer 10.

[0060] The repair capsule includes an outer layer, an intermediate layer and a repair layer. The outer layer is made of a polyurethane or polyurea polymer material, and the thickness of the outer layer is 10 - 50 μm; the intermediate layer is a brittle resin layer with a thickness of 5 - 10 μm, and the repair layer is a two-component epoxy resin formed by combining an epoxy prepolymer and an amine curing agent. The repair layer accounts for 60% - 80% of the mass of the repair capsule.

[0061] The outer layer of the repair capsule is a polymer material protection layer. After the intermediate brittle resin layer is compressed and broken, the two-component epoxy resin is released and infiltrates into the crack, quickly curing to repair the crack and preventing the crack from further expanding.

[0062] Embodiment 2

[0063] As Figures 1-3 shown, based on Claim 1, a galvanized steel wire mesh 5 is installed between the crack-resistant layer and the steel structure column 2. The galvanized steel wire mesh 5 completely covers the first covering surface 201 and the third covering surface 203, and the galvanized steel wire mesh 5 partially covers the second covering surface 202 and the fourth covering surface 204. The fiberglass mesh cloth 4 and the galvanized steel wire mesh 5 cooperate to form a "flexible + rigid" double crack-resistant system between the steel structure column 2 and the exterior wall panel 2. The fiberglass mesh cloth provides flexible tensile strength, and the steel wire mesh enhances rigid support, jointly suppressing the crack expansion and reducing the probability of crack appearance.

[0064] A waterproof layer 12 is provided between the galvanized steel wire mesh 5 and the crack-resistant layer. The waterproof layer 12 completely wraps the first covering surface 201 and extends 300 - 500 mm towards the second covering surface 202 and the fourth covering surface 204. The waterproof layer 12 extends to cover the covering surface to prevent water vapor erosion.

[0065] A fireproof layer is provided between the steel structure column 2 and the galvanized steel wire mesh 5. The fireproof layer completely covers the first covering surface 201 and the third covering surface 203, and wraps the four corners of the steel structure column 2.

[0066] A protective layer 6 is provided between the galvanized steel wire mesh 5 wrapping the third covering surface 203 and the crack-resistant layer. The protective layer 6 is a mortar leveling layer. Both ends of the protective layer 6 are connected to the surface of the exterior wall panel 1. The mortar base provides a flat base surface and enhances the adhesion. The protective layer is a leveling layer, which improves the surface durability.

[0067] Embodiment 3

[0068] As Figures 1-3 As shown, an exterior wall panel and steel structure column covering structure and construction method include an exterior wall panel 1 and a steel structure column 2. It is characterized in that: the steel structure column 2 includes a first covering surface 201, a second covering surface 202, a third covering surface 203, and a fourth covering surface 204. It also includes a connecting layer 8. The second covering surface 202 and the fourth covering surface 204 are connected to the exterior wall panel 1 through the connecting layer 8. The surface of the steel structure column 2 and the exterior wall panel 1 is covered with a mortar base 3.

[0069] A crack-resistant layer is provided on the surfaces of the first covering surface 201 and the third covering surface 203. The crack-resistant layer includes multiple layers of fiberglass mesh cloth 4.

[0070] The fiberglass mesh cloth 4 extends along the surfaces of the exterior wall panel 1 on both sides in the horizontal direction. Multiple layers of the fiberglass mesh cloth 4 are staggeredly lapped at the inside corner formed at the connection between the exterior wall panel 1 and the steel structure column 2.

[0071] A fiber band is provided between adjacent fiberglass mesh cloth 4. The fiber band is inclined.

[0072] Multiple layers of fiberglass mesh cloth 4 extend in the horizontal direction and are staggeredly lapped at the inside corner. Combined with the inclined fiber band, a multiple crack-resistant barrier is formed.

[0073] The mesh cloth disperses stress, and the fiber band absorbs deformation stress in different directions through the inclined direction, further reducing the probability of crack generation.

[0074] Both ends of the connecting layer 8 are covered with a sealing layer 7. The sealing layer 7 includes a silicone sealant layer and a gypsum mortar layer. The silicone sealant layer is located between the connecting layer 8 and the gypsum mortar layer. By filling silicone sealant and gypsum mortar, a double waterproof measure is formed to prevent water from seeping into the connection, and the overall waterproof property is improved.

[0075] The connecting layer 8 uses a PU foaming agent to fill the gap between the steel structure column 2 and the exterior wall panel 1 to connect the steel structure column 2 and the exterior wall panel 1. The PU foaming agent fills the gap, adapts to the thermal expansion and contraction deformation of the structure, reduces stress concentration, and avoids cracks at the connection caused by thermal expansion and contraction.

[0076] A self - repair layer 10 is provided at the connection between the exterior wall panel 1 and the steel structure column 2. The self - repair layer 10 completely wraps the internal corner, and repair capsules are evenly dispersed inside the self - repair layer 10.

[0077] The repair capsules include an outer layer, an intermediate layer and a repair layer. The outer layer is made of polyurethane or polyurea polymer material, and the thickness of the outer layer is 10 - 50 μm; the intermediate layer is a brittle resin layer with a thickness of 5 - 10 μm, and the repair layer is a two - component epoxy resin formed by a combination of epoxy prepolymer and amine curing agent. The repair layer accounts for 60% - 80% of the mass of the repair capsule.

[0078] The outer layer of the repair capsule is a polymer material protective layer. After the intermediate brittle resin layer is compressed and broken, the two - component epoxy resin is released and infiltrates into the crack, quickly curing to repair the crack and preventing the crack from further expanding.

[0079] A galvanized steel wire mesh 5 is installed between the crack - resistant layer and the steel structure column 2. The galvanized steel wire mesh 5 completely covers the first covering surface 201 and the third covering surface 203, and the galvanized steel wire mesh 5 partially covers the second covering surface 202 and the fourth covering surface 204. The fiberglass mesh cloth 4 cooperates with the galvanized steel wire mesh 5 to form a "flexible + rigid" double crack - resistant system between the steel structure column 2 and the exterior wall panel 2. The fiberglass mesh cloth provides flexible tensile strength, and the steel wire mesh enhances rigid support, jointly suppressing crack expansion and reducing the probability of crack occurrence.

[0080] A waterproof layer 12 is provided between the galvanized steel wire mesh 5 and the crack - resistant layer. The waterproof layer 12 completely wraps the first covering surface 201 and extends 300 - 500 mm towards the second covering surface 202 and the fourth covering surface 204. The waterproof layer 12 extends to cover the covering surface to prevent water vapor erosion.

[0081] A fire - proof layer is provided between the steel structure column 2 and the galvanized steel wire mesh 5. The fire - proof layer completely covers the first covering surface 201 and the third covering surface 203, and wraps the four corners of the steel structure column 2.

[0082] A protective layer 6 is provided between the galvanized steel wire mesh 5 wrapping the third covering surface 203 and the crack - resistant layer. The protective layer 6 is a mortar leveling layer. The two ends of the protective layer 6 are connected to the surface of the exterior wall panel 1. The mortar base provides a flat base surface and enhances adhesion; the protective layer is a leveling layer, improving surface durability.

[0083] Example 4

[0084] A construction method for the cladding structure of an exterior wall panel 1 and a steel structure column 2 includes the following steps:

[0085] Construction preparation: Conduct on-site acceptance of materials to ensure they meet the specifications, performance, and national standards required by the design. Clean the floating dust, oil stains, and loose materials on the surfaces of steel structure columns 2 and exterior wall panels 1 to ensure the base layer is flat, dry, and free of cracks. According to the construction drawings, mark the laying ranges of the covering surfaces 201, 202, 203, 204 and the positions of the internal corners at the joints between the steel structure columns and the exterior wall panels.

[0086] 2. Installation of steel structure column 2 and exterior wall panel 1: Fix the steel structure column 2 vertically to the main frame according to the design requirements, ensuring that its axial deviation ≤ 3 mm and its perpendicularity deviation ≤ 2 mm / m. Connect the precast exterior wall panel 1 to the steel structure column 2 through embedded parts or bolts, adjust the width of the panel joint to 5 - 10 mm, and check that the horizontal and vertical deviations ≤ 2 mm.

[0087] 3. Construction of the connection layer: Use a special injection gun to inject PU foaming agent into the gap between the steel structure column 2 and the exterior wall panel 1, filling it densely without voids, and the foaming volume expansion rate ≥ 80%.

[0088] Construction of the sealing layer: Silicone sealant layer: Uniformly apply silicone sealant along the surface of the filled gap, with a thickness ≥ 3 mm, to form a continuous elastic sealing band.

[0089] Gypsum mortar layer: Apply gypsum mortar on the surface of the sealant, with a thickness of 5 - 8 mm, a covering width ≥ 50 mm, and cure for 24 hours until it hardens.

[0090] 4. Construction of the fireproof layer: Spray intumescent fireproof coating 9, with a dry film thickness ≥ 2 mm, completely covering the four corners of the steel structure column and the covering surfaces;

[0091] 5. Installation of galvanized steel wire mesh 5: Lay the galvanized steel wire mesh 5 with a mesh size of 10 mm × 10 mm, covering the first covering surface 201 and the third covering surface 203, and extending ≥ 200 mm to the second covering surface 202 and the fourth covering surface 204. Fix it with nails or U-shaped clips, with a spacing ≤ 400 mm, ensuring that the mesh surface is flat without warping.

[0092] 6. Construction of the waterproof layer: Brush polymer cement-based waterproof coating, with a thickness ≥ 1.5 mm, covering the first covering surface 201 and extending 300 - 500 mm to the second and fourth covering surfaces to form a continuous waterproof membrane.

[0093] 7. Construction of the self-repairing layer: Uniformly spread repair capsules at the internal corner parts at the joints between the exterior wall panel 1 and the steel structure column 2, with a density of 30 - 50 capsules / ㎡, ensuring that the capsules are completely embedded in the self-repairing layer. Or use a spraying process to cover the internal corners with self-repairing material containing repair capsules, with a thickness ≥ 5 mm, and cure for 48 hours until it is completely cured.

[0094] 8. Construction of crack-resistant layer: On the surfaces of the first cladding surface 201 and the third cladding surface 203 of the steel structure column, lay multiple layers of fiberglass mesh cloth 4 in layers. Each layer extends horizontally to the surface of the exterior wall panel 1, and the adjacent layers are stagger-lapped by ≥100 mm.

[0095] At the inside corner, the "stepped lapping method" is adopted, and each layer of mesh cloth is staggered by 50 - 100 mm to ensure no continuous joints.

[0096] Embed polyester fiber belts obliquely at 45° - 60° between adjacent fiberglass mesh cloth layers, with a fixed spacing of ≤300 mm, and bond them firmly with epoxy resin glue.

[0097] 9. Construction of the protective layer 6: Apply a mortar leveling layer on the surface of the galvanized steel wire mesh 5 with a thickness of 5 - 8 mm, and smoothly transition to the surface of the exterior wall panel 1, with the surface flatness deviation of ≤3 mm / 2 m. [[ID=ID=10]]

[0098] 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 can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. 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.

[0099] 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. An exterior wall panel and steel structure column cladding structure and construction method, comprising an exterior wall panel (1) and a steel structure column (2), characterized in that: The steel structure column (2) comprises a first covering surface (201), a second covering surface (202), a third covering surface (203), and a fourth covering surface (204), and also comprises a connecting layer (8), wherein the second covering surface (202) and the fourth covering surface (204) are connected to the exterior wall panel (1) via the connecting layer (8), the surface of the steel structure column (2) and the exterior wall panel (1) are covered with a mortar base (3), the surface of the first covering surface (201) and the surface of the third covering surface (203) are provided with an anti-cracking layer, and the anti-cracking layer comprises multiple layers of glass fiber mesh cloth (4), wherein the glass fiber mesh cloth (4) extends along the surface of the exterior wall panel (1) on both sides in the horizontal direction, and the multiple layers of the glass fiber mesh cloth (4) are staggered and overlapped at the inner corner formed at the connection between the exterior wall panel (1) and the steel structure column (2), and a fiber belt is provided between adjacent glass fiber mesh cloths (4), and the fiber belt is arranged obliquely.

2. The exterior wall panel and steel column cladding structure and construction method according to claim 1, characterized in that: Both ends of the connecting layer (8) are covered with a sealing layer (7), the sealing layer (7) comprising a silicone sealant layer and a gypsum mortar layer, the silicone sealant layer being located between the connecting layer (8) and the gypsum mortar layer.

3. The exterior wall panel and steel column cladding structure and construction method according to claim 2, characterized in that: The connection layer (8) uses a PU foaming agent to fill the gap between the steel structure column (2) and the exterior wall panel (1) to connect the steel structure column (2) and the exterior wall panel (1).

4. The exterior wall panel and steel column cladding structure and construction method according to claim 1, characterized in that: A self-repairing layer (10) is provided at the connection between the exterior wall panel (1) and the steel structure column (2), the self-repairing layer (10) completely wraps the inner corner, and repair capsules are evenly dispersed inside the self-repairing layer (10).

5. The exterior wall panel and steel column cladding structure and construction method according to claim 4, characterized in that: The repair capsule includes an outer layer, an intermediate layer and a repair layer. The outer layer is made of polyurethane or polyurea polymer material, and the thickness of the outer layer is 10 to 50 μm; the intermediate layer is a brittle resin layer, and the thickness is 5 to 10 μm. The repair layer is made of a two-component epoxy resin formed by combining an epoxy prepolymer and an amine curing agent, and the repair layer accounts for 60% to 80% of the mass of the repair capsule.

6. The exterior wall panel and steel column cladding structure and construction method according to claim 1, characterized in that: A galvanized steel wire mesh (5) is installed between the anti-cracking layer and the steel structure column (1), the galvanized steel wire mesh (5) covers the surface of the first covering surface (201) and the third covering surface (203), and the galvanized steel wire mesh (5) partially covers the second covering surface (202) and the fourth covering surface (204).

7. The exterior wall panel and steel column cladding structure and construction method according to claim 6, characterized in that: A waterproof layer (12) is provided between the galvanized steel wire mesh (5) and the anti-cracking layer, and the coverage area of the waterproof layer (12) is the same as the coverage area of the galvanized steel wire mesh (5).

8. The exterior wall panel and steel column cladding structure and construction method according to claim 7, characterized in that: A fireproof layer is provided between the steel structure column (1) and the galvanized steel wire mesh (5), and the fireproof layer completely covers the first covering surface (201) and the third covering surface (203), and covers the four corners of the steel structure column (1).

9. The exterior wall panel and steel column cladding structure and construction method according to claim 1, characterized in that: A protective layer (6) is provided between the galvanized steel wire mesh (5) wrapping the third covering surface (203) and the anti-cracking layer. The protective layer (6) is a mortar leveling layer. Both ends of the protective layer (6) are connected to the surface of the exterior wall panel (1).

10. A construction method of an exterior wall panel and steel column cladding structure and construction method, comprising an exterior wall panel and steel column cladding structure and construction method according to any one of claims 1 to 9, characterized in that: The following steps are involved: 1) Construction preparation: Based on the construction drawings, mark the cladding surface laying range and the inner corner position at the connection between the steel structure column (2) and the exterior wall panel (1); 2) Installation of steel structure columns (2) and exterior wall panels (1): Fix the steel structure columns (2) vertically to the main frame according to the design requirements, and check the horizontality and verticality deviation; 3) Construction of the connection layer (8): Use a special glue gun to inject PU foaming agent into the gap between the steel structure column (2) and the exterior wall panel (1), filling it tightly without any gaps; Construction of the sealing layer (7): Silicone sealant layer: Apply silicone sealant evenly along the surface of the filled gap; Gypsum mortar layer: Apply gypsum mortar on the surface of the sealant; 4) Construction of fireproof layer (9): spraying intumescent fireproof coating (9) with dry film thickness ≥ 2mm, completely covering the four corners and cladding surface of the steel structure column (2); 5) Installation of galvanized steel wire mesh (5): Lay galvanized steel wire mesh (5) with a mesh size of 10 mm × 10 mm, covering the first covering surface (201) and the third covering surface (203), and extending ≥ 200 mm toward the second covering surface (202) and the fourth covering surface (204); 6) Construction of waterproof layer (12): Apply polymer cement-based waterproof coating with a thickness of ≥1.5mm, covering the first covering surface (201) and extending 300-500mm to the second and fourth covering surfaces to form a continuous waterproof membrane. 7) Construction of self-repairing layer (10): Evenly spread the repair capsules at the inner corner of the connection between the exterior wall panel (1) and the steel structure column (2), ensuring that the capsules are completely embedded in the self-repairing layer (10), or use the spraying process to cover the inner corner with the self-repairing material containing the repair capsules, with a thickness of ≥5mm, and maintain for 48 hours until it is completely solidified; 8) Construction of the anti-cracking layer: Multiple layers of glass fiber mesh cloth (4) are laid on the first covering surface (201) and the third covering surface (203) of the steel structure column, with each layer extending horizontally to the surface of the exterior wall panel (1). The adjacent layers are overlapped at the inner corners using a "step-type overlap method" to ensure that there are no continuous seams; adjacent layers of glass fiber mesh cloth are embedded with polyester fiber tape at an angle of 45° to 60°, with a fixed spacing of ≤300mm, and are firmly bonded using epoxy resin glue; 9) Construction of protective layer (6): Apply mortar leveling layer on the surface of galvanized steel wire mesh (5).

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