A construction method and reinforcement structure for double-layer AAC exterior wall panels and window opening nodes of frame buildings

Abstract

The present invention provides a method for constructing a window opening node for a double-layer AAC exterior wall panel in a frame building, comprising the following steps: pre-embedded components during structural construction, preparation for the AAC exterior wall panel window opening node, welding and installing window opening keels, installing L-shaped brackets, hook bolts, and angle steel, installing the AAC exterior wall panel, and filling the AAC exterior wall panel window opening node keels with insulation material. Also disclosed is a window opening node structure for a double-layer AAC exterior wall panel in a frame building, comprising full-height vertical keels on both sides, upper and lower horizontal keels, tie-type vertical keels, supporting vertical keels, the AAC exterior wall panel at the window opening, a structural steel beam, and a pre-embedded floor decking plate. The top and bottom ends of the full-height vertical keels are welded to the structural steel beam and pre-embedded floor decking plate, respectively. The upper and lower horizontal keels are fixedly connected to the upper and lower portions of the full-height vertical keels on both sides, and are fixedly connected to the structural steel beam and floor decking plate via tie-type vertical keels and supporting vertical keels. The present invention solves the problem of creating extra-wide window openings in double-layer AAC exterior wall panels.

Description

Technical Field

[0001] The present invention relates to the technical field of building curtain walls, and in particular to a construction method for a frame building AAC exterior wall panel window opening node and a reinforcement structure thereof. Background Art

[0002] AAC / ALC stands for Autoclaved Lightweight Concrete (AAC / ALC). It's primarily made from silica sand, cement, lime, and aluminum paste or powder. AAC / ALC autoclaved aerated concrete products are constructed from porous concrete panels (reinforced with treated steel bars) that are reinforced with anti-corrosion-treated double-layer steel mesh and cured with high-pressure steam. They can be used for both wall and roof panels, and are a new building material with superior performance. This product has received environmental management system certification.

[0003] AAC wall panels offer outstanding energy conservation and environmental benefits, making them a lightweight, environmentally friendly wall material with superior performance. Currently, AAC wall panels are used in building construction for exterior, interior, floor, and roof cladding. In this project, the exterior wall panels were designed and installed in accordance with Atlas 13J104, "Autoclaved Aerated Concrete Block and Panel Construction," Atlas 19CJ85-1, "Autoclaved Aerated Concrete Panel Maintenance System for Prefabricated Buildings," Atlas 03SG715-1, "Autoclaved Lightweight Aerated Concrete Panel (NAAC / ALC) Construction Details," and DB11 / T 2003-2022, "Technical Specification for the Application of Autoclaved Aerated Concrete Wall Panel Systems." However, following these atlases resulted in the design dimensions of the window openings in the framed, double-layer AAC exterior wall panels being significantly smaller than the project's intended window opening dimensions. Summary of the Invention

[0004] To overcome the problems encountered in actual projects, the present invention provides a method for constructing window opening nodes on AAC exterior wall panels of high-rise buildings and a reinforcement structure thereof. This method can solve the problem of providing oversized windows on double-layer AAC exterior wall panels with a frame structure.

[0005] A method for constructing a double-layer AAC exterior wall panel window opening node of a frame building comprises the following steps:

[0006] Step 1: Pre-embedded parts for structural construction: According to the AAC wall panel detailed drawing, determine the position of the full-height vertical keel at the exterior window opening, and pre-embed the full-height vertical keel embedded plate in the floor decking. Determine the position of the supporting vertical keel, and pre-embed the supporting vertical keel embedded plate in the floor decking.

[0007] Step 2: Preparation for the construction of AAC exterior wall panel window opening nodes: Check the layout and the position, elevation and quantity of the full-height vertical keel embedded plates and the supporting vertical keel embedded plates;

[0008] Step 3. Window opening keel welding: According to the AAC exterior wall panel detailed drawing, full-height vertical keels are set on both sides of the window opening. The lower end of the full-height vertical keel is welded and fixed to the full-height vertical keel embedded plate in the floor decking, and the upper end of the full-height vertical keel is welded and fixed to the structural steel beam. Upper and lower horizontal keels are set above and below the window opening. The ends of the upper horizontal keel are welded and fixed to the upper parts of the full-height vertical keels on both sides, and the ends of the lower horizontal keel are welded and fixed to the lower parts of the full-height vertical keels on both sides;

[0009] Step 4. Fix the window opening keels: Arrange multiple tie vertical keels between the structural steel beam and the horizontal keel with a spacing of less than or equal to 1200mm. The upper ends of the tie vertical keels are welded to the structural steel beam, and the lower ends of the tie vertical keels are welded to the horizontal keel. Arrange multiple supporting vertical keels between the floor deck and the lower horizontal keel with a spacing of less than or equal to 1750mm. The upper ends of the supporting vertical keels are welded to the lower horizontal keel, and the lower ends of the supporting keels are welded to the embedded plates of the supporting vertical keels in the floor deck; weld the lower ends of the full-height vertical keels to the embedded plates of the full-height vertical keels in the floor deck;

[0010] Step 5, L-shaped bracket, hook bolt and angle steel fixation: L-shaped bracket is set in the middle position of each AAC exterior wall panel, and the L-shaped bracket is fixed to the upper horizontal keel at intervals of the width of the AAC exterior wall panel. The L-shaped bracket includes an outer leaf L-shaped bracket and an inner leaf L-shaped bracket. The outer leaf L-shaped bracket and the inner leaf L-shaped bracket are respectively welded and fixed to both sides of the upper horizontal keel. According to the AAC exterior wall panel deepening layout drawing, the angle steel is fixed to the upper horizontal keel at intervals of the AAC exterior wall panel width. The hook head of the hook head bolt is hooked on the angle steel and fixed to the angle steel by welding. The angle steel includes an outer leaf angle steel and an inner leaf angle steel. The outer leaf angle steel and the inner leaf angle steel are respectively fixed to the upper horizontal keel according to the position of the hook head bolt. The hook head bolt includes an outer leaf hook head bolt and an inner leaf hook head bolt. The hook head of the outer leaf hook head bolt is welded and fixed to the outer leaf angle steel, and the hook head of the inner leaf hook head bolt is welded and fixed to the inner leaf angle steel.

[0011] Step 6: Fill the window opening keels with insulation material: The full-height vertical keels, upper horizontal keel, lower horizontal keel, multiple tie-type vertical keels, and multiple supporting vertical keels on both sides are hollow galvanized square steel. Fill the hollow interiors of the full-height vertical keels, upper horizontal keel, lower horizontal keel, multiple tie-type vertical keels, and multiple supporting vertical keels with insulation material;

[0012] Step 7, AAC exterior wall panel installation: AAC exterior wall panels are installed in sequence from both sides of the window opening to the middle of the window opening. AAC exterior wall panels include outer leaf panels, sandwich composite rock wool and inner leaf panels. Install the outer leaf panels first. The outer leaf panel support is lifted on the outer leaf L-shaped bracket, and the outer leaf panel is tied to the upper horizontal keel through the outer leaf hook bolts and the outer leaf angle steel. Multiple outer leaf panels are placed on the outer leaf L-shaped brackets at different positions from both sides of the window opening to the middle of the window opening, and fixed on the outer leaf angle steels at different positions. Composite rock wool is fixed to the inner panel of the outer leaf panel through anchor nails. Finally, install the inner leaf panel. The inner leaf panel is lifted on the inner leaf L-shaped bracket, and the inner leaf panel is tied to the upper horizontal keel through the inner leaf hook bolts and the inner leaf angle steel. Multiple outer leaf panels are placed on the inner leaf L-shaped brackets at different positions from both sides of the window opening to the middle of the window opening, and fixed on the outer leaf angle steels at different positions.

[0013] Furthermore, in step 1, the embedded plates of the full-height vertical keels and the embedded plates of the supporting vertical keels are galvanized steel plates.

[0014] Furthermore, in step 2, the control lines and window opening position lines of the AAC exterior wall panels are measured and laid out according to the structural control axis.

[0015] Furthermore, in steps 3 and 4, all welding fixation is performed by carbon dioxide shielded welding fixation.

[0016] Furthermore, in step 6, a through hole is opened in the AAC outer wall panel according to the position of the hook bolt, a groove is opened on the outer side of the AAC outer wall, and a metal washer and nut are used to fix the outer side of the hook bolt.

[0017] Furthermore, in step 7, two 6mm circular holes are opened on the full-height vertical keels, the upper horizontal keel, the lower horizontal keel, the multiple tie vertical keels and the multiple supporting vertical keels on both sides with a spacing of less than or equal to 1.2 meters, and the hollow interiors of the full-height vertical keels, the upper horizontal keel, the lower horizontal keel, the multiple tie vertical keels and the multiple supporting vertical keels made of galvanized hollow square steel are filled with insulation material through the circular holes. The insulation material is B1 grade polyurethane foam.

[0018] The second technical solution provided by the present invention is:

[0019] A frame building AAC exterior wall panel window opening node reinforcement structure, including a window opening keel, a tie vertical keel, a supporting vertical keel, an AAC exterior wall panel on the window opening, a structural steel beam and a floor decking embedded plate, the floor decking embedded plate includes a vertical keel embedded plate and a supporting vertical keel embedded plate, the window opening keel includes two sides of full-height vertical keels, an upper horizontal keel and a lower horizontal keel, the top of the full-height vertical keel is fixedly connected to the structural steel beam, the bottom of the full-height vertical keel is fixedly connected to the vertical keel embedded plate, the two ends of the upper horizontal keel are welded to the two sides of the full-height vertical keel, the two ends of the lower horizontal keel are welded to the two sides of the full-height vertical keel, and a plurality of the supporting vertical keels are connected at a spacing of less than or equal to 1200mm. Arranged between the structural steel beam and the horizontal keel, the top of the supporting vertical keel is fixedly connected to the lower horizontal keel, and the lower end of the supporting vertical keel is fixedly connected to the supporting vertical keel embedded plate. Multiple tie vertical keels are arranged between the floor decking and the lower horizontal keel with a spacing of less than or equal to 1750mm. The lower end of the tie vertical keel is fixedly connected to the upper horizontal keel, and the upper end of the tie vertical keel is fixedly connected to the structural steel beam. The AAC exterior wall panel is fixedly connected to the upper horizontal keel through a hook bolt, and the top of the AAC exterior wall panel is fixedly connected to the structural steel beam through a U-shaped clip. The full-height vertical keels, upper horizontal keel, lower horizontal keel, multiple tie vertical keels and multiple supporting vertical keels on both sides are hollow galvanized square steels, and the hollow galvanized square steels are filled with insulation material.

[0020] Furthermore, it also includes angle steel and L-shaped brackets. The L-shaped bracket is arranged in the middle position of each AAC exterior wall panel. The L-shaped bracket is fixed to the upper horizontal keel at intervals of the width of the AAC exterior wall panel. The L-shaped bracket includes an outer leaf L-shaped bracket and an inner leaf L-shaped bracket. The outer leaf L-shaped bracket and the inner leaf L-shaped bracket are respectively welded and fixed to both sides of the upper horizontal keel. The angle steel is fixed to the upper horizontal keel at intervals of the width of the AAC exterior wall panel. The hook head of the hook head bolt is hooked on the angle steel, and the hook head of the hook head bolt is fixed to the angle steel by welding. The angle steel includes an outer leaf angle steel and an inner leaf angle steel. The outer leaf angle steel and the inner leaf angle steel are symmetrically fixed to the upper horizontal keel inside and outside. The hook head bolt includes an outer leaf hook head bolt and an inner leaf hook head bolt. The hook head of the outer leaf hook head bolt is welded and fixed to the outer leaf angle steel, and the hook head of the inner leaf hook head bolt is welded and fixed to the inner leaf angle steel.

[0021] Furthermore, the AAC exterior wall panels are arranged in sequence from both sides of the window opening to the middle of the window opening. The AAC exterior wall panels include outer leaf panels, interlayer composite rock wool and inner leaf panels. The composite rock wool is arranged between the outer leaf panels and the inner leaf panels, and the composite rock wool is fixed to the panel surface of the outer leaf panel close to the inner leaf panel by anchor nails. The outer leaf panels are lifted on the outer leaf L-shaped brackets, and the outer leaf panels are fixed to the outer leaf angle steels by outer leaf hook bolts. Multiple outer leaf panels are lifted on the outer leaf L-shaped brackets at different positions from both sides of the window opening to the middle of the window opening, and fixed to the outer leaf angle steels at different positions. The inner leaf panels are lifted on the inner leaf L-shaped brackets, and the inner leaf panels are fixed to the inner leaf angle steels by inner leaf hook bolts. Multiple outer leaf panels are lifted on the inner leaf L-shaped brackets at different positions from both sides of the window opening to the middle of the window opening, and fixed to the outer leaf angle steels at different positions.

[0022] Furthermore, the top of the full-height vertical keel is connected to the structural steel beam by carbon dioxide shielded welding, the bottom end of the full-height vertical keel is connected to the embedded plate of the floor decking by carbon dioxide shielded welding, the two ends of the upper horizontal keel are connected to the full-height vertical keels on both sides by carbon dioxide shielded welding, the two ends of the lower horizontal keel are connected to the full-height vertical keels on both sides by carbon dioxide shielded welding, the top of the supporting vertical keel is connected to the lower horizontal keel by carbon dioxide shielded welding, the lower end of the supporting vertical keel is connected to the embedded plate of the supporting vertical keel by carbon dioxide shielded welding, the lower end of the tie vertical keel is connected to the upper horizontal keel by carbon dioxide shielded welding, and the upper end of the tie vertical keel is connected to the structural steel beam by carbon dioxide shielded welding, and the thermal insulation material is B1 grade polyurethane foam.

[0023] Furthermore, the AAC exterior wall panels are arranged in sequence from both sides of the window opening to the middle of the window opening. The AAC exterior wall panels include outer leaf panels, interlayer composite rock wool and inner leaf panels. The composite rock wool is arranged between the outer leaf panels and the inner leaf panels. The composite rock wool is fixed to the board surface of the outer leaf panel close to the inner leaf panel by special composite rock wool anchors. The number of anchors for fixing is 6 / ㎡. The outer leaf panels are lifted on the outer leaf L-shaped brackets, and the outer leaf panels are fixed to the outer leaf angle steel by outer leaf hook bolts. Multiple outer leaf panels are placed on the outer leaf L-shaped brackets at different positions from both sides of the window opening to the middle of the window opening, and fixed on the outer leaf angle steels at different positions. The inner leaf panels are lifted on the inner leaf L-shaped brackets, and the inner leaf panels are fixed to the inner leaf angle steels at different positions by inner leaf hook bolts. Multiple inner leaf panels are lifted on the inner leaf L-shaped brackets at different positions from both sides of the window opening to the middle of the window opening, and fixed on the outer leaf angle steels at different positions.

[0024] The present invention has the following beneficial effects: Using galvanized hollow square steel as the joints between AAC exterior wall panels and window openings, and as the keel for the window openings, it creates a high-strength keel supporting the window openings of the AAC exterior wall panels and the joints between the AAC exterior wall panels and window openings. This solves the problem of creating extra-wide window openings in double-layer AAC exterior wall panels. Furthermore, the galvanized hollow square steel is filled with insulation material, preventing thermal bridges from occurring at the joints between the AAC exterior wall panels and window openings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a node elevation drawing of a double-layer AAC exterior wall panel window opening of a frame building of the present invention;

[0026] Figure 2 The present invention is a longitudinal cross-sectional view of a window hole node of a double-layer AAC exterior wall panel of a frame building.

[0027] Description of symbols in the accompanying drawings:

[0028] 1. Tie-type vertical purlins, 2. Supporting vertical purlins, 3. AAC exterior wall panels, 31. Outer leaf panels, 33. Inner leaf panels, 4. Structural steel beams, 5. Full-height vertical purlins, 6. Upper horizontal purlins, 7. Lower horizontal purlins, 8. Angle steel, 9. Outer leaf L-shaped brackets

[0029] 10. Inner leaf L-shaped bracket, 11. Outer leaf hook bolt, 12. Support vertical keel embedded plate, 13. Floor decking, 14. Inner leaf hook bolt, 15. Insulation material. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0031] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0032] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] In the description of this patent, unless otherwise expressly specified or limited, when the term "connection" or the like appears to indicate a connection relationship between components, the term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in this invention can be understood according to the specific circumstances.

[0034] A method for constructing a window opening node of a double-layer AAC exterior wall panel of a frame building comprises the following steps:

[0035] Step 1: Pre-embedded parts for structural construction: According to the AAC wall panel detailed drawing, determine the position of the full-height vertical keel at the exterior window opening, and pre-embed the full-height vertical keel embedded plate in the floor decking. Determine the position of the supporting vertical keel, and pre-embed the supporting vertical keel embedded plate in the floor decking.

[0036] Furthermore, the embedded plates for the full-height vertical keels and the embedded plates for the supporting vertical keels are galvanized steel plates. In order to prevent corrosion of the embedded plates, galvanized steel plates are used as the embedded plates for the full-height vertical keels and the embedded plates for the supporting vertical keels.

[0037] Step 2: Preparation for the construction of AAC exterior wall panel window opening nodes: Detection and layout, and check the position, elevation, and quantity of the full-height vertical keel embedded plates and the supporting vertical keel embedded plates;

[0038] Furthermore, the control lines and window opening position lines of the AAC exterior wall panels are checked and measured, and the control lines of the AAC exterior wall panels are measured and set according to the structural control axis.

[0039] Step 3. Window opening keel welding: According to the AAC exterior wall panel detailed drawing, full-height vertical keels are set on both sides of the window opening. The lower end of the full-height vertical keel is welded and fixed to the full-height vertical keel embedded plate in the floor decking, and the upper end of the full-height vertical keel is welded and fixed to the structural steel beam. Upper and lower horizontal keels are set above and below the window opening. The ends of the upper horizontal keel are welded and fixed to the upper parts of the full-height vertical keels on both sides, and the ends of the lower horizontal keel are welded and fixed to the lower parts of the full-height vertical keels on both sides;

[0040] Step 4: Fix the window opening keels: Arrange multiple tie vertical keels between the structural steel beam and the horizontal keel with a spacing of less than or equal to 1200mm. The upper ends of the tie vertical keels are welded to the structural steel beam, and the lower ends of the tie vertical keels are welded to the horizontal keel. Arrange multiple support vertical keels between the floor deck and the lower horizontal keel with a spacing of less than or equal to 1750mm. The upper ends of the support vertical keels are welded to the lower horizontal keel, and the lower ends of the support keels are welded to the embedded plate of the support vertical keel in the floor deck.

[0041] Furthermore, in steps 3 and 4, on each floor of the building, full-height vertical purlins are installed from the structural steel beam to the floor deck. After the lower end of the full-height vertical purlin is welded and fixed to the full-height vertical purlin embedded plate in the floor deck, the position is checked according to the indoor wall panel control line to ensure the room span size and room squareness. At the same time, a straight line is drawn from the first floor to the top floor outside this layer of structure to ensure that the full-height vertical purlin deviation of the upper and lower floors of the same facade is within the specification range. All welding and fixing between the lower end of the full-height vertical purlin and the full-height vertical purlin embedded plate in the floor deck, the upper end of the full-height vertical purlin and the structural steel beam, the ends of the horizontal purlin and the full-height vertical purlins on both sides, the ends of the lower horizontal purlin and the full-height vertical purlins on both sides, the upper end of the tie vertical purlin and the structural steel beam, the lower end of the tie vertical purlin and the horizontal purlin, the upper end of the supporting vertical purlin and the lower horizontal purlin, and the lower end of the supporting vertical purlin and the embedded plate in the floor deck are all fixed by carbon dioxide shielded welding. The weld form and weld leg height meet the requirements of in-depth design.

[0042] Step 5, L-shaped bracket, hook bolt and angle steel fixation: L-shaped bracket is set in the middle position of each AAC exterior wall panel, and the L-shaped bracket is fixed to the upper horizontal keel at intervals of the width of the AAC exterior wall panel. The L-shaped bracket includes an outer leaf L-shaped bracket and an inner leaf L-shaped bracket. The outer leaf L-shaped bracket and the inner leaf L-shaped bracket are respectively welded and fixed to both sides of the upper horizontal keel. According to the AAC exterior wall panel deepening layout drawing, the angle steel is fixed to the upper horizontal keel at intervals of the AAC exterior wall panel width. The hook head of the hook head bolt is hooked on the angle steel and fixed to the angle steel by welding. The angle steel includes an outer leaf angle steel and an inner leaf angle steel. The outer leaf angle steel and the inner leaf angle steel are respectively fixed to the upper horizontal keel according to the position of the hook head bolt. The hook head bolt includes an outer leaf hook head bolt and an inner leaf hook head bolt. The hook head of the outer leaf hook head bolt is welded and fixed to the outer leaf angle steel, and the hook head of the inner leaf hook head bolt is welded and fixed to the inner leaf angle steel.

[0043] Furthermore, in step 5, the position of the L-shaped bracket is determined based on the AAC exterior wall panel detailed layout drawing. Specifically, it is placed in the middle of the window opening, outside the AAC exterior wall panel. After the L-shaped bracket is welded to the horizontal keel, the L-shaped bracket position and elevation are verified to ensure consistency among L-shaped brackets at the same height, and the horizontality of each L-shaped bracket is also consistent. After confirmation, the L-shaped bracket is welded around three sides using CO2 shielded welding. The outer leaf L-shaped bracket is 40×100×8mm, and the inner leaf L-shaped bracket is 40×70×5mm. The angle steel is L63×6, and the fixed angle steel position is determined based on the detailed layout drawing.

[0044] Step 6: Fill the AAC exterior wall panel window opening node keels with insulation material: The full-height vertical keels, upper horizontal keels, lower horizontal keels, multiple tie-type vertical keels, and multiple supporting vertical keels on both sides are hollow galvanized square steel. Fill the hollow interiors of the full-height vertical keels, upper horizontal keels, lower horizontal keels, multiple tie-type vertical keels, and multiple supporting vertical keels on both sides of the hollow galvanized square steel with insulation material;

[0045] Furthermore, in step 6, two 6mm circular holes are opened on the full-height vertical keels, the upper horizontal keel, the lower horizontal keel, the multiple tie vertical keels and the multiple supporting vertical keels on both sides with a spacing of less than or equal to 1.2 meters, and the hollow interiors of the full-height vertical keels, the upper horizontal keel, the lower horizontal keel, the multiple tie vertical keels and the multiple supporting vertical keels made of galvanized hollow square steel are filled with insulation material through the circular holes. The insulation material is B1 grade polyurethane foam.

[0046] Step 7, AAC exterior wall panel installation: AAC exterior wall panels are installed in sequence from both sides of the window opening to the middle of the window opening. AAC exterior wall panels include outer leaf panels, sandwich composite rock wool and inner leaf panels. The outer leaf panels are installed first. The outer leaf panels are lifted on the outer leaf L-shaped brackets and fixed to the outer leaf angle steels through outer leaf hook bolts. Multiple outer leaf panels are lifted on outer leaf L-shaped brackets at different positions from both sides of the window opening to the middle of the window opening and fixed to outer leaf angle steels at different positions. Composite rock wool is fixed to the surface of the outer leaf panels close to the outer leaf panels close to the inner leaf panels through anchor nails. Finally, the inner leaf panels are installed. The inner leaf panels are lifted on the inner leaf L-shaped brackets and fixed to the inner leaf angle steels through inner leaf hook bolts. Multiple outer leaf panels are lifted on inner leaf L-shaped brackets at different positions from both sides of the window opening to the middle of the window opening and fixed to outer leaf angle steels at different positions.

[0047] Furthermore, in step 7, holes are drilled in the AAC exterior wall panels according to the positions of the hook bolts, grooves are cut on the outside of the AAC exterior wall, and metal washers and nuts are used to secure the outside of the hook bolts, with the distance between the hook bolts and the panel end being ≥100 mm.

[0048] During the construction of this embodiment, the maximum width of the window openings in the double-layer AAC exterior wall panels designed and installed according to the atlas was 2.4 meters. However, in this project, the AAC exterior wall panels required extra-large windows with a width of 5-6 meters. To address the problems encountered in actual projects, the technical solution of the present invention is proposed. The present invention uses galvanized hollow square steel as the joints between the AAC exterior wall panels and the window openings, and as the keel for the window openings. This creates a high-strength keel frame that supports the window openings of the AAC exterior wall panels, as well as a keel frame for the joints between the AAC exterior wall panels and the window openings. This solves the problem of extra-wide window openings in double-layer AAC exterior wall panels of frame buildings. Furthermore, the galvanized hollow square steel is filled with insulation material to prevent the occurrence of thermal bridges at the joints between the AAC exterior wall panels and the window openings. This reduces wet work at the construction site, improves construction efficiency, and saves project costs.

[0049] The present invention also discloses a double-layer AAC exterior wall panel window opening node structure for a frame building, such as Figures 1 to 2 As shown, it includes window opening keels, tie vertical keels 1, supporting vertical keels 2, AAC exterior wall panels 3 on the window openings, structural steel beams 4, floor decking slabs 13 and floor decking embedded plates. The floor decking embedded plates are embedded in the floor decking slabs 13 during structural construction. The floor decking embedded plates include vertical keel embedded plates and supporting vertical keel embedded plates 12. The window opening keels include full-height vertical keels 5 on both sides, upper horizontal keels 6 and lower horizontal keels 7. The top ends of the full-height vertical keels 5 are fixedly connected to the structural steel beams 4, and the bottom ends of the full-height vertical keels 5 are fixedly connected to the vertical keel embedded plates. The two ends of the upper horizontal keel 6 are welded to the full-height vertical keels 5 on both sides, and the two ends of the lower horizontal keel 7 are welded to the full-height vertical keels 5 on both sides. A plurality of tie vertical keels 1 are arranged on the structural steel beams with a spacing of less than or equal to 1200 mm. Between the beam 4 and the upper horizontal keel 6, the top of the tie vertical keel 1 is fixedly connected to the structural steel beam 4, and the lower end of the tie vertical keel 1 is fixedly connected to the upper horizontal keel 6. Multiple supporting vertical keels 2 are arranged between the floor decking and the lower horizontal keel 7 with a spacing of less than or equal to 1750 mm. The upper end of the supporting vertical keel 2 is fixedly connected to the lower horizontal keel 7, and the lower end of the supporting vertical keel 2 is fixedly connected to the supporting vertical keel embedded plate 12. The bottom end of the AAC exterior wall panel 3 is fixedly connected to the upper horizontal keel 6 by a hook bolt 11, and the top of the AAC exterior wall panel 3 is fixedly connected to the structural steel beam 4 by a hook bolt 11. The full-height vertical keels 5, the upper horizontal keel 6, the lower horizontal keel 7, the multiple tie vertical keels 1 and the multiple supporting vertical keels 2 on both sides are hollow galvanized square steels, and the hollow galvanized square steels are filled with insulation material 15.

[0050] Further, if Figures 1 to 2As shown, it also includes angle steel 8 and L-shaped brackets. The L-shaped brackets are set in the middle of each AAC exterior wall panel 3. The L-shaped brackets are fixed to the upper horizontal keel 6 at intervals of the width of the AAC exterior wall panel 3. The L-shaped brackets include outer leaf L-shaped brackets 9 and inner leaf L-shaped brackets 10. The outer leaf L-shaped brackets 9 and the inner leaf L-shaped brackets 10 are respectively welded and fixed to both sides of the upper horizontal keel 6. The angle steels 8 are fixed to the upper horizontal keel at intervals of the width of the AAC exterior wall panel. The hook head of the hook head bolt is hooked on the angle steel, and the hook head of the hook head bolt 11 is fixed to the angle steel by welding. The angle steel 8 includes an outer leaf angle steel and an inner leaf angle steel. The outer leaf angle steel and the inner leaf angle steel are respectively fixed to the upper horizontal keel 6 according to the position of the hook head bolt. The hook head bolt includes an outer leaf hook head bolt 11 and an inner leaf hook head bolt 14. The hook head of the outer leaf hook head bolt 11 is welded and fixed to the outer leaf angle steel, and the hook head of the inner leaf hook head bolt 14 is welded and fixed to the inner leaf angle steel.

[0051] Further, if Figures 1 to 2 As shown, the AAC exterior wall panels 3 are arranged in sequence from both sides of the window opening to the middle of the window opening. The AAC exterior wall panels 3 include an outer leaf panel 31, a sandwich composite rock wool and an inner leaf panel 33. The composite rock wool is arranged between the outer leaf panel 31 and the inner leaf panel 33. The composite rock wool is fixed to the plate surface of the outer leaf panel 31 near the inner leaf panel 33 by anchor nails. The outer leaf panel 31 is lifted on the outer leaf L-shaped bracket 9 and fixed to the outer leaf angle steel by the outer leaf hook bolt 11. Multiple outer leaf panels are fixed to the outer leaf angle steel by anchor nails. The blades 31 are lifted on the outer leaf L-shaped brackets 9 at different positions from both sides of the window opening to the middle position of the window opening, and fixed on the outer leaf angle steels at different positions. The inner blades 33 are lifted on the inner leaf L-shaped brackets 10, and fixed on the inner leaf angle steels by the inner leaf hook bolts 14. Multiple inner blades 33 are lifted on the inner leaf L-shaped brackets 10 at different positions from both sides of the window opening to the middle position of the window opening, and fixed on the outer leaf angle steels at different positions.

[0052] Further, if Figures 1 to 2 As shown, the top of the full-height vertical keel 5 is connected to the structural steel beam 4 by carbon dioxide shielded welding, the bottom end of the full-height vertical keel 5 is connected to the vertical keel embedded plate by carbon dioxide shielded welding, the two ends of the upper horizontal keel 6 are connected to the full-height vertical keels 5 on both sides by carbon dioxide shielded welding, the two ends of the lower horizontal keel 7 are connected to the lower part of the full-height vertical keels 5 on both sides by carbon dioxide shielded welding, the top of the supporting vertical keel 2 is connected to the lower horizontal keel 7 by carbon dioxide shielded welding, the lower end of the supporting vertical keel 2 is connected to the supporting vertical keel embedded plate 12 by carbon dioxide shielded welding, the lower end of the tie vertical keel 1 is connected to the upper horizontal keel 6 by carbon dioxide shielded welding, and the upper end of the tie vertical keel 1 is connected to the structural steel beam 4 by carbon dioxide shielded welding, and the thermal insulation material 15 is B1 grade polyurethane foam.

[0053] It should be noted that the above-described specific embodiments are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that various modifications, equivalent substitutions, and variations may be made to the present invention. However, as long as these modifications do not depart from the spirit of the present invention, they are intended to be within the scope of protection of the present invention. Furthermore, certain terms used in the specification and claims of this application are not intended to be limiting and are provided solely for ease of description.

Claims

1. A construction method for a double-layer AAC exterior wall panel window opening node of a frame building, characterized in that: The following steps are involved: Step 1: Pre-embedded parts for structural construction: According to the AAC wall panel detailed drawing, determine the position of the full-height vertical keel at the exterior window opening, and pre-embed the full-height vertical keel embedded plate in the floor decking. Determine the position of the supporting vertical keel, and pre-embed the supporting vertical keel embedded plate in the floor decking. Step 2: Preparation for the construction of AAC exterior wall panel window opening nodes: Measure and lay out, and check the position, elevation, and quantity of the full-height vertical keel embedded plates and the supporting vertical keel embedded plates; Step 3. Window opening keel welding: According to the AAC exterior wall panel detailed drawing, full-height vertical keels are set on both sides of the window opening. The lower end of the full-height vertical keel is welded and fixed to the full-height vertical keel embedded plate in the floor decking, and the upper end of the full-height vertical keel is welded and fixed to the structural steel beam. Upper and lower horizontal keels are set above and below the window opening. The ends of the upper horizontal keel are welded and fixed to the full-height vertical keels on both sides. The bottom elevation of the upper horizontal keel is the same as the top elevation of the window opening. The ends of the lower horizontal keel are welded and fixed to the lower part of the full-height vertical keels on both sides. The top elevation of the lower horizontal keel is the same as the bottom elevation of the window opening. Step 4: Install window opening keels: Arrange multiple tie keels between the structural steel beam and the horizontal keel with a spacing of less than or equal to 1200mm. Weld the upper ends of the tie keels to the structural steel beam, and weld the lower ends of the tie keels to the horizontal keel. Arrange multiple support keels between the floor deck and the lower horizontal keel with a spacing of less than or equal to 1750mm. Weld the upper ends of the support keels to the lower horizontal keel, and weld the lower ends of the support keels to the embedded plates of the support keels in the floor deck. Step 5. Install the L-shaped bracket, hook bolt and angle steel: The L-shaped bracket is set in the middle of each AAC exterior wall panel. The L-shaped bracket is fixed to the upper horizontal keel at intervals of the width of the AAC exterior wall panel. The L-shaped bracket includes an outer leaf L-shaped bracket and an inner leaf L-shaped bracket. The outer leaf L-shaped bracket and the inner leaf L-shaped bracket are welded and fixed to both sides of the upper horizontal keel respectively. According to the AAC exterior wall panel deepening layout drawing, the angle steel is fixed to the upper horizontal keel at intervals of the AAC exterior wall panel width. The hook head of the hook bolt is hooked on the angle steel and fixed to the angle steel by welding. The angle steel includes an outer leaf angle steel and an inner leaf angle steel. The outer leaf angle steel and the inner leaf angle steel are fixed to the upper horizontal keel respectively according to the position of the hook bolt. The hook bolt includes an outer leaf hook bolt and an inner leaf hook bolt. The hook head of the outer leaf hook bolt is welded and fixed to the outer leaf angle steel, and the hook head of the inner leaf hook bolt is welded and fixed to the inner leaf angle steel. Step 6: Fill the AAC exterior wall panel window opening node keels with insulation material: The full-height vertical keels, upper horizontal keels, lower horizontal keels, multiple tie vertical keels, and multiple supporting vertical keels on both sides are hollow galvanized square steel. Fill the hollow interiors of the hollow galvanized square steel full-height vertical keels, upper horizontal keels, lower horizontal keels, multiple tie vertical keels, and multiple supporting vertical keels with insulation material; Step 7, AAC exterior wall panel installation: AAC exterior wall panels are installed in sequence from both sides of the window opening to the middle of the window opening. AAC exterior wall panels include outer leaf panels, sandwich composite rock wool and inner leaf panels. The outer leaf panels are installed first. The outer leaf panels are lifted on the outer leaf L-shaped brackets and tied to the upper horizontal keel through the outer leaf hook bolts and the outer leaf angle steel. Multiple outer leaf panels are placed on the outer leaf L-shaped brackets at different positions from both sides of the window opening to the middle of the window opening and fixed on the outer leaf angle steels at different positions. The composite rock wool is fixed to the outer leaf panels near the inner side of the outer leaf panels through anchor nails. Finally, the inner leaf panels are installed. The inner leaf panels are lifted on the inner leaf L-shaped brackets and tied to the upper horizontal keel through the inner leaf hook bolts and the inner leaf angle steel. Multiple outer leaf panels are lifted on the inner leaf L-shaped brackets at different positions from both sides of the window opening to the middle of the window opening and fixed on the outer leaf angle steels at different positions.

2. The method for constructing a double-layer AAC exterior wall panel window opening node of a frame building according to claim 1 is characterized in that: In step 1, the embedded plates of the full-height vertical purlins and the embedded plates of the supporting vertical purlins are galvanized steel plates.

3. The method for constructing a double-layer AAC exterior wall panel window opening node of a frame building according to claim 1 is characterized in that: In step 2, the control lines and window opening position lines of the AAC exterior wall panels are measured and laid out based on the structural control axis.

4. The method for constructing a double-layer AAC exterior wall panel window opening node of a frame building according to claim 1 is characterized in that: In steps 3 and 4, all welding fixation is carbon dioxide shielded welding fixation.

5. The method for constructing a double-layer AAC exterior wall panel window opening node of a frame building according to claim 1 is characterized in that: In step 6, a through hole is opened in the AAC exterior wall panel according to the position of the hook bolt, a groove is opened on the outside of the AAC exterior wall panel, and a metal washer and nut are used to fix the outside of the hook bolt.

6. The method for constructing a double-layer AAC exterior wall panel window opening node of a frame building according to claim 1 is characterized in that: In step 7, two 6mm circular holes are opened on the full-height vertical keels, the upper horizontal keel, the lower horizontal keel, the multiple tie vertical keels and the multiple supporting vertical keels on both sides with a spacing of less than or equal to 1.2 meters. The hollow interiors of the full-height vertical keels, the upper horizontal keel, the lower horizontal keel, the multiple tie vertical keels and the multiple supporting vertical keels made of galvanized hollow square steel are filled with insulation material through the circular holes. The insulation material is B1 grade polyurethane foam.

7. The frame building double-layer AAC exterior wall panel window opening node reinforcement structure designed according to the frame building double-layer AAC exterior wall panel window opening node construction method of claim 1 is characterized in that: The invention comprises a window opening keel, a tie-type vertical keel (1), a supporting vertical keel (2), an AAC exterior wall panel (3) on the window opening, a structural steel beam (4), a floor decking plate (13) and a floor decking plate embedded plate, wherein the floor decking plate embedded plate is embedded in the floor decking plate (13) during structural construction, and the floor decking plate embedded plate comprises a vertical keel embedded plate and a supporting vertical keel embedded plate (12), and the window opening keel comprises vertical keels (5) on both sides, an upper horizontal keel (6) and a lower horizontal keel. The top of the through-height vertical keel (5) is fixedly connected to the structural steel beam (4), the bottom of the through-height vertical keel (5) is fixedly connected to the vertical keel embedded plate, the two ends of the upper horizontal keel (6) are welded and fixedly connected to the through-height vertical keels (5) on both sides, the two ends of the lower horizontal keel (7) are welded and fixedly connected to the through-height vertical keels (5) on both sides, and the multiple tie-type vertical keels (1) are arranged at a spacing of less than or equal to 1200 mm between the structural steel beam (4) and the vertical keel (5). Between the upper horizontal keels (6), the top end of the tie-type vertical keel (1) is fixedly connected to the structural steel beam (4), the lower end of the tie-type vertical keel (1) is fixedly connected to the upper horizontal keel (6), and a plurality of the supporting vertical keels (2) are arranged between the floor deck and the lower horizontal keel (7) with a spacing of less than or equal to 1750mm, the upper end of the supporting vertical keel (2) is fixedly connected to the lower horizontal keel (7), and the lower end of the supporting vertical keel (2) is fixedly connected to the supporting vertical keel embedded plate (12). The bottom end of the AAC exterior wall panel (3) is fixedly connected to the upper horizontal keel (6) through a hook head bolt (11), and the top end of the AAC exterior wall panel (3) is fixedly connected to the structural steel beam (4) through a hook head bolt (11). The vertical keels (5), the upper horizontal keel (6), the lower horizontal keel (7), the plurality of tie vertical keels (1) and the plurality of supporting vertical keels (2) on both sides are hollow galvanized square steels, and the hollow galvanized square steels are filled with thermal insulation material (15).

8. The double-layer AAC exterior wall panel window opening node reinforcement structure of a frame building according to claim 7 is characterized in that: The invention also includes an angle steel (8) and an L-shaped bracket. The L-shaped bracket is arranged in the middle of each AAC outer wall panel (3). The L-shaped bracket is fixed on the upper horizontal keel (6) at intervals of the width of the AAC outer wall panel (3). The L-shaped bracket includes an outer leaf L-shaped bracket (9) and an inner leaf L-shaped bracket (10). The outer leaf L-shaped bracket (9) and the inner leaf L-shaped bracket (10) are respectively welded and fixed on both sides of the upper horizontal keel (6). The angle steel (8) is fixed on the upper horizontal keel (6) at intervals of the width of the AAC outer wall panel. On the horizontal keel, the hook head of the hook head bolt is hooked on the angle steel, and the hook head of the hook head bolt (11) is fixed to the angle steel by welding. The angle steel (8) includes an outer leaf angle steel and an inner leaf angle steel. The outer leaf angle steel and the inner leaf angle steel are respectively fixed to the upper horizontal keel (6). The hook head bolt includes an outer leaf hook head bolt (11) and an inner leaf hook head bolt (14). The hook head of the outer leaf hook head bolt (11) is welded and fixed to the outer leaf angle steel, and the hook head of the inner leaf hook head bolt (14) is welded and fixed to the inner leaf angle steel.

9. The double-layer AAC exterior wall panel window opening node reinforcement structure of a frame building according to claim 7 is characterized in that: The top of the full-height vertical keel (5) is connected to the structural steel beam (4) by carbon dioxide shielded welding, the bottom of the full-height vertical keel (5) is connected to the vertical keel embedded plate by carbon dioxide shielded welding, the two ends of the upper horizontal keel (6) are connected to the full-height vertical keels (5) on both sides by carbon dioxide shielded welding, the two ends of the lower horizontal keel (7) are connected to the full-height vertical keels (5) on both sides by carbon dioxide shielded welding, the top of the supporting vertical keel (2) is connected to the lower horizontal keel (7) by carbon dioxide shielded welding, the lower end of the supporting vertical keel (2) is connected to the supporting vertical keel embedded plate (12) by carbon dioxide shielded welding, the lower end of the tie vertical keel (1) is connected to the upper horizontal keel (6) by carbon dioxide shielded welding, and the upper end of the tie vertical keel (1) is connected to the structural steel beam (4) by carbon dioxide shielded welding, and the thermal insulation material (15) is B1 grade polyurethane foam.

10. The double-layer AAC exterior wall panel window opening node reinforcement structure of a frame building according to claim 8 is characterized in that: The AAC exterior wall panels (3) are arranged in sequence from both sides of the window opening to the middle of the window opening. The AAC exterior wall panels (3) include an outer leaf panel (31), a sandwich composite rock wool, and an inner leaf panel (33). The composite rock wool is arranged between the outer leaf panel (31) and the inner leaf panel (33). The composite rock wool is fixed to the surface of the outer leaf panel (31) near the inner leaf panel (33) by special composite rock wool anchors. The number of anchors for fixing is 6 per square meter. The outer leaf panel (31) is lifted on the outer leaf L-shaped bracket (9) and is fixed to the outer leaf by the outer leaf hook bolt (11). The blades are fixed on the outer blade angle steel, and multiple outer blades (31) are sequentially placed on the outer blade L-shaped brackets (9) at different positions from both sides of the window opening to the middle position of the window opening, and are fixed on the outer blade angle steel at different positions. The inner blade (33) is lifted on the inner blade L-shaped bracket (10), and the inner blade (33) is fixed to the inner blade angle steel by the inner blade hook bolt (14). Multiple inner blades (33) are sequentially lifted on the inner blade L-shaped brackets (10) at different positions from both sides of the window opening to the middle position of the window opening, and are fixed on the outer blade angle steel at different positions.

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