Installation and construction method for square steel stand column ring beam of autoclaved aerated concrete external wall panel

Abstract

The invention discloses an autoclaved aerated concrete external wall panel square steel stand column ring beam installation construction method, and relates to the technical field of building construction. The method comprises the following steps of S1, construction preparation, S2, surveying and setting out, S3, base layer leveling, S4, rear embedded plate installation, S5, square steel installation and welding, S6, anticorrosive coating brushing, S7, batten wall installation and fixing, S8, batten wall pointing and repairing, S9, net hanging and S10, inspection and acceptance. At present, only square steel stand columns need to be installed indoors, the working environment is greatly improved, and potential safety hazards are eliminated. Meanwhile, original concrete pouring is optimized into square steel installation, on-site wet operation is reduced, environment protection is facilitated, construction disturbance to residents is reduced, and improvement of construction safety and minimization of influence on the construction environment are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and specifically to a construction method for installing square steel columns and ring beams of autoclaved aerated concrete exterior wall panels. Background Technique

[0002] With the development of construction technology and the country's emphasis on energy conservation and environmental protection, prefabricated buildings have received strong support from the government;

[0003] The existing tower structure is a concrete-filled steel tube column - steel beam - reinforced concrete core tube structure, with a floor height of 4.2 - 5.3 meters. The exterior wall is made of autoclaved aerated concrete panels and requires the setting of concrete construction columns. There is no traditional external scaffold protection around the outer frame of the tower. If traditional wooden formwork is used for assembly and reinforcement of the exterior wall construction columns, it will be difficult to construct, and there are also significant safety hazards for operators working at heights outdoors. Therefore, the present invention proposes a construction method for installing square steel columns and ring beams of autoclaved aerated concrete exterior wall panels, aiming to optimize the traditional formwork-supported pouring of construction columns and ring beams into the installation of square steel columns and square steel ring beams, solving the problem of difficult construction of exterior wall construction columns and ring beams. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a construction method for installing square steel columns and ring beams of autoclaved aerated concrete exterior wall panels, solving the problems in the background technique that if traditional wooden formwork is used for assembly and reinforcement of the existing exterior wall construction columns, it will be difficult to construct, and there are also significant safety hazards for operators working at heights outdoors.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A construction method for installing square steel columns and ring beams of autoclaved aerated concrete exterior wall panels, the steps are as follows:

[0006] S1. Construction preparation: Clean the joint parts of the infill wall and the structural wall, column, and slab surface, and clean up the floating ash, sand, soil, and crispy substances. Any mortar and concrete blocks protruding from the ground must be removed and swept clean;

[0007] S2. Measuring and setting out: Before wall construction, the surveyor should set out the wall edge line, control line, door and window opening position line, and column edge line according to the architectural drawing;

[0008] S3. Base leveling: Before installing the post-embedded plate, it is necessary to chisel or repair and level the base surface to ensure that the base is on the same horizontal plane;

[0009] S4. Installation of Post-embedded Plates: After snapping the elevation horizontal line, determine the elevation of the square steel, and fix the post-embedded plates to the concrete structure. High-strength building anchor bolts (RM16) are used for the embedded parts. Mark the positions of the post-embedded parts on the structure with ink lines, with the vertical deviation less than 5 mm. Before installing the post-embedded plates, first position and drill holes according to the measurement results, and drill holes according to the length of the anchor bolts, the thickness of the embedded plates, and the exposed dimensions.

[0010] S5. Installation and Welding of Square Steel: The top and bottom of the square steel columns are respectively fixed to the bottom of the upper layer board and the surface of this layer board through post-embedded plates with expansion bolts. The square steel ring beams are connected to the square steel columns by welding. According to the measured dimensions of the square steel columns and square steel ring beams, use a cutting machine to cut the square steel raw materials into corresponding lengths. First, fix the square steel columns on the surface of the post-embedded plates, correct the verticality after positioning, then weld and fix them. Then, use a small hand chain hoist to assist in hoisting and installation, and connect the square steel ring beams and the columns by welding.

[0011] S6. Coating the Anti-corrosion Layer: After cleaning the welding slag at the welding parts of the square steel ring beams and columns, then coat the anti-corrosion layer and do anti-corrosion treatment. Epoxy zinc-rich primer is used, and the film thickness is not less than 80 μm. Before applying the topcoat, epoxy mica iron intermediate paint must be applied on the primer, and the film thickness is not less than 140 μm.

[0012] S7. Installation and Fixing of the Strip Wall: The installation and fixing of the strip wall include applying slurry with special ALC mortar and installing the boards to ensure that the joints are full and installing them in sequence; and through cutting and patching the boards, fixing with pipe clamps and using ALC mortar for bonding to ensure that the wallboards are vertical and the flatness is controlled within ±4 mm. After installation, use special tools to correct the wallboards to ensure that their flatness and verticality meet the standards.

[0013] S8. Pointing and Repairing of the Strip Wall: After installing the wallboard of one side of the wall, comprehensively check the flatness and verticality of the wall; and repair the damaged parts of the board surface and edges with repair powder, and its color and texture should be consistent with the board products, and the performance should be matched.

[0014] S9. Hanging the Mesh: After the water and electricity grooving is completed, then take out the top and bottom wooden wedges, fill and level the V-shaped joints of the wallboards, and then carry out the mesh hanging treatment. Alkali-resistant fiberglass mesh cloth with a width of not less than 100 mm between the boards and not less than 200 mm wide at the junction of the board and the main body is pressed into the crack-resistant mortar to prevent cracking at the joints. The alkali-resistant fiberglass mesh cloth is 100 g - 120 g / ㎡

[0015] S10. Inspection and Acceptance: The surface of the strip wall is smooth, with consistent color, clean, the joints are uniform and straight; the positions of the holes, grooves, and boxes on the strip wall are correct, the cutting is square, the edges are neat, the strip wall joint treatment is in place, the installation is vertical and flat and meets the requirements, the position is correct, and there are no cracked or damaged boards.

[0016] Preferably, for the strip wall to be installed later in S2, the same position line should be returned to the bottom of the structural beam and slab. If two lines can be placed, both the upper and lower lines must be placed. For the installation layout of the strip wallboard, the squareness of the room bay should be considered. When it is parallel to the unplastered walls, beams, and column edges, the thickness of the plaster layer should be noted.

[0017] Preferably, the construction steps of the anchor bolts in S4 are as follows:

[0018] a. Drilling: Drill holes according to the requirements of the hole diameter and depth. The drilling tool is an electric drill or a water drill. During drilling, it is necessary to ensure that the drill and the drill bit are perpendicular to the surface of the base material; ensure that the hole diameter and depth dimensions are accurate, and the deviation of the vertical hole or horizontal hole should be less than 2°. b. Hole cleaning: First, clean the hole with a brush, and then use an air pump to blow out the dust in the hole, at least three times repeatedly, until no dust escapes. When the hole wall is wet, the curing time needs to be doubled to ensure that there is no obvious water in the hole. c. Placing the glass tube: Place the glass tube into the hole, with the part with more voids in the glass tube facing outwards, ensuring that it has reached the bottom of the hole. d. Installing the screw: After the glass tube is placed, connect the screw to the drill through the bit. Place the drill in the rotation + hammering gear at 750 revolutions per minute, and screw the screw into the hole until the marking ring, while visually observing a small amount of glue overflowing.

[0019] Preferably, during the connection in S5, angle steel can be used in combination with welding to temporarily fix the square steel ring beam; after installing the square steel columns and the square steel ring beam, use a level to adjust the levelness and perpendicularity of the steel frame to ensure that the strip wall will not tilt or distort after installation.

[0020] Preferably, the specific construction method for the installation and fixation of the strip wall in S7 is as follows:

[0021] a. Sizing and Board Installation: Apply ALC special mortar with a thickness of 8 - 10 mm inside the convex grooves of the wall panels to be installed, structural columns, and floor baselines; move the wall panels to the positions where the mortar has been applied. b. Cutting and Patch Board: When the width of the wall panel is less than the width of a whole board, a patch board should be used, and the width of the patch board should not be less than 200 mm; if there are door and window openings on the partition wall, start from the openings and move towards both sides; align the bottom end of the board with the ink line, use a crowbar at the bottom to pry, fix the upper end of the board tightly, knead and squeeze the edges of the board tightly, and scrape the extruded mortar flat to make the board in a vertical state, and wedge the bottom of the board with wooden wedges; when the height exceeds the standard size of the wall panel, stagger the installation. c. Pipe Clip Fixing and ALC Special Mortar: After installing and aligning the wall panels, temporarily fix the wall panels with wooden wedges. Use ALC special mortar to bond the wall panels to the top or bottom of the floor slab and the upper and lower connections of the wall panels. For parts with waterproof requirements, a concrete guide wall with a height of 200 mm needs to be made. d. Correction of Flatness: After the wall panels are initially installed, use a special crowbar to correct them; use a 2 m straightedge and an infrared ray to measure the flatness and verticality of the wall surface. The deviation of the verticality and flatness of the wall panels should be controlled within ±4 mm; check whether the strip board is aligned with the positioning lines pre-drawn on the top surface and the ground surface. After verification, wedge or use stone slices to tightly squeeze and top from the bottom end, not too tightly, and then remove the crowbar.

[0022] Preferably, when installing the wall panels, use a crowbar to pry the wall panels from the bottom, force the panels to approach each other, so that the excess mortar is extruded from the joints, and then scrape off the mortar protruding from the wall panel surface to ensure that the mortar at the joints between the panels is full; at the top and both sides of the partition wall panel, cover with ALC special mortar; install in sequence from one end of the main wall and column to the other end according to the board arrangement plan, and install from the floor of the floor slab to the top of the floor slab or the bottom of the beam.

[0023] Preferably, the wall panels adopt the pipe clip method, with one pipe clip at the top and one at the bottom, and each is 80 mm away from the end of the board; when the pipe clip is connected to the floor slab, use a nail gun for connection, and when connected to the square steel ring beam, use a nail gun for connection or spot weld the pipe clip to the steel beam; add U-shaped steel clips at the intersection of the side of the strip board wall and the square steel column or shear wall, with a spacing ≤1000, and use ALC special mortar for caulking.

[0024] Preferably, in S8, a V-shaped joint is used at the joint of the boards to avoid secondary cutting and patching due to the cracking of the board joint mortar in the later stage. Do not remove the wooden wedges on the top and bottom surfaces during jointing; repair the damaged parts of the board surface and corners with anti-cracking mortar, and finally require the board surface to be flat.

[0025] Preferably, in S8, for boards with particularly severe corner chipping, cut them first and then use them in non-whole board areas. When using boards with partial corner chipping as whole boards, they need to be repaired after the board installation. The repair material is a special adhesive for repair. For positions with larger corner chipping, layer-by-layer repair is required to ensure that the board surface is flat after repair. During the repair process, loose materials at the corner chipping positions need to be removed to ensure that the repair material can be tightly combined with the board after repair.

[0026] The present invention provides a construction method for installing square steel columns and ring beams of autoclaved aerated concrete exterior wall panels. It has the following beneficial effects:

[0027] (1) In this construction method for installing square steel columns and ring beams of autoclaved aerated concrete exterior wall panels, by adopting a new installation process for square steel columns and ring beams, the original method of using outdoor hanging baskets to work at heights to reinforce the formwork of exterior wall construction columns is now optimized to only install square steel columns indoors. The working environment has been greatly improved, and potential safety hazards have been eliminated. At the same time, the original concrete pouring is now optimized to the installation of square steel, reducing on-site wet operations, which is beneficial to environmental protection and reducing construction nuisance, achieving an improvement in construction safety and minimizing the impact on the construction environment.

[0028] (2) This construction method for installing square steel columns and ring beams of autoclaved aerated concrete exterior wall panels adopts the construction process of square steel columns and ring beams, abandoning the traditional formwork support and pouring processes, and instead using prefabricated square steel profiles. It achieves one-time forming through direct welding. This process simplifies the construction process and effectively avoids common quality problems in traditional construction, such as honeycombing defects, rough surfaces (pitted surfaces), and insufficient pouring at the top of construction columns. Due to the standardization of the construction process and the prefabrication of materials, the consistency and reliability of material and installation quality are ensured, thus significantly improving the overall construction quality of the project.

[0029] (3) This construction method for installing square steel columns and ring beams of autoclaved aerated concrete exterior wall panels benefits from the easy availability and convenience of square steel materials in the market. The construction process follows a simple and efficient process flow: First, according to precise dimensional measurements, the square steel materials are cut to fit the design specifications. Subsequently, through the coordinated operation of chain hoists and manual labor, the rapid lifting and positioning of the square steel are achieved, and then precise welding is carried out. In addition, chemical anchor bolts and finished steel plates are used for the installation of post-embedded plates, and rapid fixation is achieved with the help of power tools, significantly improving construction efficiency. Compared with traditional construction methods, this construction method avoids cumbersome processes such as formwork support, reinforcement, pouring, form removal, and curing, achieving a significant improvement in construction speed and a substantial saving in construction period, demonstrating the construction characteristics of high efficiency and high benefits.

[0030] It solves the problem that it is difficult to construct if traditional wooden formwork is assembled and reinforced for existing exterior wall construction columns, and there are also significant safety hazards for operators working at heights outdoors. Brief Description of the Drawings

[0031] Figure 1 It is a schematic structural diagram of the present invention;

[0032] Figure 2 It is a detailed drawing of the post-embedded plate of the present invention;

[0033] Figure 3This is the welding drawing of the square steel column and the post-embedded plate of the present invention;

[0034] Figure 4 This is the welding drawing of the square steel column and the ring beam of the present invention;

[0035] Figure 5 This is the sectional view of the installation method of the pipe clamp for the strip wall of the present invention;

[0036] Figure 6 This is the detailed installation drawing of the L-shaped pipe clamp of the present invention;

[0037] Figure 7 This is the connection drawing of the square steel column and the corner of the strip wall of the present invention;

[0038] Figure 8 This is the connection drawing of the square steel column and the strip wall of the present invention;

[0039] Figure 9 This is the elevation view of the connection between the square steel column and the U-shaped steel clamp of the strip wall of the present invention. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] Please refer to Figure 1 , the embodiments of the present invention provide a technical solution: the installation construction method of the square steel column ring beam for the autoclaved aerated concrete exterior wall panel, and the steps are as follows:

[0042] S1. Construction preparation: Clean the joint parts of the infilled wall and the structural wall, column, and slab surface, and clean up the floating ash, sand, soil, and flaky substances. All mortar and concrete blocks protruding from the ground must be removed and swept clean;

[0043] S2. Measuring and setting out: Before the wall construction, the surveyor should set out the wall edge line, control line, door and window opening position line, and column edge line according to the architectural drawing;

[0044] S3. Base leveling: Before the installation of the post-embedded plate, it is necessary to chisel or repair and level the base surface to ensure that the base surface is on the same horizontal plane;

[0045] S4. Installation of post-embedded plates: After the horizontal reference line is snapped, determine the elevation of the square steel, and fix the post-embedded plates to the concrete structure. High-strength building anchor bolts (RM16) are used for the embedded parts. Mark the positions of the post-embedded parts on the structure with ink lines, with the vertical deviation less than 5 mm. Before installing the post-embedded plates, first position and drill holes according to the measurement results, and drill holes according to the length of the anchor bolts, the thickness of the embedded plates, and the exposed dimensions, as Figure 2 shown;

[0046] S5. Installation and welding of square steel: The top and bottom of the square steel columns are respectively fixed to the bottom of the upper layer plate and the surface of this layer by expansion bolts through the post-embedded plates. The square steel ring beams are connected to the square steel columns by welding. According to the measured dimensions of the square steel columns and square steel ring beams, use a cutting machine to cut the square steel raw materials into corresponding lengths. First, fix the square steel columns on the surface of the post-embedded plates, correct the verticality after positioning, and then weld and fix them. Then, use a small chain block to cooperate with the hoisting for installation, and connect the square steel ring beams and the columns by welding, as Figures 3-4 shown;

[0047] S6. Painting the anti-corrosion layer: After cleaning the welding slag at the welded parts of the square steel ring beams and columns, then paint the anti-corrosion layer for anti-corrosion treatment. Epoxy zinc-rich primer is used, and the film thickness is not less than 80 um. Before applying the topcoat, an epoxy mica iron intermediate coat must be applied on the primer, and the film thickness is not less than 140 um;

[0048] S7. Installation and fixing of the strip wall: The installation and fixing of the strip wall include applying mortar with special ALC mortar, installing the boards, ensuring that the joints are full and installing them in sequence; and through cutting and patching the boards, fixing with pipe clamps and bonding with ALC mortar, ensuring that the wallboards are vertical and the flatness is controlled within ±4 mm; after installation, use special tools to correct the wallboards to ensure that their flatness and verticality meet the standards;

[0049] S8. Pointing and repairing of the strip wall: After the boards of one side of the wall are installed, comprehensively check the flatness and verticality of the wall; and repair the damaged parts of the board surface and edges with repair powder, and its color and texture should be consistent with the board products, and the performance should match;

[0050] S9. Hanging the mesh: After the water and electricity grooving is completed, then take out the top and bottom wooden wedges, fill and level the V-shaped joints of the wallboards, and then carry out the mesh hanging treatment. The alkali-resistant fiberglass mesh cloth with a width of not less than 100 mm between the boards and not less than 200 mm wide at the junction of the board and the main body is pressed into the crack-resistant mortar to prevent cracking at the joints. The alkali-resistant fiberglass mesh cloth is 120 g / ㎡

[0051] S10. Inspection and acceptance: The surface of the strip wall is smooth, with consistent color, clean, the joints are uniform and straight; the positions of the holes, grooves, and boxes on the strip wall are correct, the cutting is square, the edges are neat, the joint treatment of the strip wall is in place, the installation is vertical and flat and meets the requirements, the position is correct, and there are no cracked or damaged boards.

[0052] For the partition wall panels that need to be installed later in S2, the same position line should be returned to the bottom of the structural beam and slab. If two lines can be placed, both the upper and lower lines must be placed. For the layout of partition wall panel installation, the squareness of the room bay should be considered. When it is parallel to the unplastered walls, beams, and column edges, the thickness of the plaster layer should be noted.

[0053] The construction steps of the anchor bolts in S4 are as follows:

[0054] a. Drilling: Drill holes according to the requirements of hole diameter and depth. The drilling tools are electric drills or water drills. During drilling, it is necessary to ensure that the drill and the drill bit are perpendicular to the surface of the base material; ensure that the hole diameter and depth dimensions are accurate, and the deviation of vertical holes or horizontal holes should be less than 2°; b. Hole cleaning: First, clean the hole with a brush, and then blow out the dust in the hole with an air pump, repeating at least three times until no dust escapes. When the hole wall is wet, the curing time needs to be doubled to ensure that there is no obvious water in the hole; c. Placing the glass tube: Place the glass tube into the hole, with the part with more voids in the glass tube facing outwards, ensuring that it has reached the bottom of the hole; d. Installing the screw: After the glass tube is placed, connect the screw to the drill through the chuck. Set the drill gear to the rotation + hammering gear at 750 revolutions per minute, and screw the screw into the hole until the marking ring, while visually observing a small amount of adhesive overflowing.

[0055] In S5, angle steel can be used in combination with welding to temporarily fix the square steel ring beam during connection; after installing the square steel columns and square steel ring beams, use a level to adjust the levelness and perpendicularity of the steel frame to ensure that the partition wall panel will not tilt or distort after installation.

[0056] The specific construction method for the installation and fixation of the partition wall panel in S7 is as follows:

[0057] a. Grouting and installing the board: Apply 10-mm-thick special mortar for ALC on the convex groove of the wall panel to be installed, the structural column, and the floor baseline; move the wall panel to the position where the mortar has been applied; b. Cutting and patching the board: When the width of the wall panel is less than the full width of one board, a patch board should be used, and the width of the patch board should not be less than 200 mm; if there are door and window openings on the partition wall, start from the openings to both sides; align the lower end of the board with the ink line, use a crowbar at the bottom to pry, fix the upper end of the board tightly, knead and squeeze the board edges tightly, and scrape off the extruded mortar to make the board in a vertical state. Wedge the bottom of the board firmly; when the height exceeds the standard size of the wall panel, it should be installed with staggered joints; c. Fixing with pipe clamps and special mortar for ALC: After the wall panel is installed and corrected, temporarily fix the wall panel with wooden wedges. The wall panel is bonded with special mortar for ALC at the top or bottom of the floor slab and at the upper and lower connections of the wall panel. The wall panel uses the pipe clamp method, with one pipe clamp at the top and one at the bottom, and each is 80 mm away from the end of the board; when the pipe clamp is connected to the floor slab, it is connected by a nail gun, and when it is connected to the square steel ring beam, it is connected by a nail gun or the pipe clamp is spot-welded to the steel beam; Add U-shaped steel clamps at the intersection of the side of the partition wall panel and the square steel column or shear wall, with a spacing ≤ 1000, and use special mortar for ALC to caulk the joints, as Figures 5-9As shown in the figure; for parts with waterproof requirements, a concrete guide wall with a height of 200 mm shall be made. d. Calibrate the flatness: After the wall panels are initially installed, use a special iron crowbar to calibrate; use a 2m straightedge and infrared ray to measure the flatness and verticality of the wall surface. The deviation of the verticality and flatness of the wall panels shall be controlled within ±4 mm; check whether the slats are aligned with the positioning lines pre-drawn on the top and bottom surfaces. After confirmation, use wooden wedges or stone slices to tightly wedge and fix from the bottom end, not too tightly, and then remove the crowbar.

[0058] When installing the wall panels, use an iron crowbar to pry the wall panels from the bottom, force the panels to get closer to each other, so that the excess mortar is squeezed out from the joints, and then scrape off the mortar protruding from the wall panel surface to ensure that the joints between the panels are filled with mortar; at the top and both sides of the partition wall panel, use special ALC mortar to cover; install in sequence from one end of the main wall and column to the other end according to the layout drawing, and install from the floor surface to the floor top or the bottom of the beam.

[0059] In S8, V-shaped caulking is adopted at the joints of the plates to avoid secondary cutting and repair of the cracking of the plate mortar in the later stage. Do not remove the wooden wedges on the top and bottom surfaces during caulking; repair the damaged parts of the plate surface and corner edges with anti-cracking mortar, and finally require the plate surface to be flat.

[0060] In S8, for severely chipped corners, they are preferably cut first and then used in the non-full-board area. When using the plates with partially chipped corners as full boards, they need to be repaired after the plates are installed. The repair material is a special adhesive for repair. For larger chipped corners, layered repair is required to ensure that the plate surface is flat after repair. During the repair process, the loose materials at the chipped corner positions need to be removed to ensure that the repair material can be tightly combined with the plate after repair.

[0061] In summary, in the present invention, the square steel columns and square steel ring beams are both made of galvanized square steel with a cross-sectional size of 200*200*8 mm. A square steel column is set at each position where the wall length ≤ 6 meters, at the corner, and at the wall intersection; a ring beam is set when the wall height ≥ 4 meters. The top and bottom of the square steel column are respectively fixed to the bottom of the upper structural beam slab and the structural surface of this layer by post-embedded plates (with a length, width, and thickness of 200*400*10 mm) using φ14 mm expansion bolts. The square steel ring beam is connected to the square steel columns or concrete wall columns on both sides by welding or post-embedded plates.

[0062] When subjected to external forces, the square steel columns bear the lateral loads such as shear resistance and earthquake resistance, and together with the square steel ring beam, form a space frame that can resist bending and shear to enhance the seismic performance of the masonry structure; in addition, it can also enhance the strength of the masonry and play a constraining role on the masonry, enabling it to have a higher deformation capacity. Setting square steel columns and ring beams at appropriate positions in the masonry of the house and connecting them to the structure can jointly strengthen the stability and integrity of the building.

[0063] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For a person skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be construed as limiting the claims concerned.

[0064] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. The installation construction method of square steel column ring beam of autoclaved aerated concrete exterior wall panel is characterized by: The steps are as follows: S1. Construction preparation: clean the joints between the filling wall and the structural wall, column, and slab surface, and remove the floating dust, sand, soil, and crispy objects. All mortar and concrete blocks protruding from the ground must be removed and swept away; S2. Measurement and layout: Before wall construction, the layout personnel should lay out the wall edge line, control line, door and window opening position line and column edge line according to the architectural drawing; S3. Leveling the base: Before installing the rear embedded plate, the base surface needs to be chiseled or repaired to ensure that the base is on the same horizontal plane; S4. Installation of rear embedded plate: After marking the elevation horizontal line, determine the elevation of the square steel, fix the rear embedded plate to the concrete structure, use high-strength building anchor bolts (RM16) as embedded parts, mark the position of the rear embedded parts on the structure with ink lines, and the upper and lower deviations are less than 5mm. Before installing the rear embedded plate, locate and drill holes according to the measurement results, and drill holes according to the length of the anchor bolts, the thickness of the embedded plate, and the exposed size; S5. Square steel installation and welding: The top and bottom of the square steel column are fixed to the bottom of the upper plate and the current plate surface respectively through the rear embedded plate with expansion bolts. The square steel ring beam is connected to the square steel column by welding. According to the measured dimensions of the square steel column and square steel ring beam, the square steel raw material is cut into corresponding lengths using a cutting machine. The square steel column is first fixed on the rear embedded plate surface, and then corrected to be vertical after positioning, and then welded and fixed. Then, a small hand chain hoist is used to cooperate with the lifting installation, and the square steel ring beam is welded to the column; S6. Apply anti-corrosion layer: clean the welding slag of the square steel ring beam and the column, and then apply the anti-corrosion layer for anti-corrosion treatment. Use epoxy zinc-rich primer with a film thickness of not less than 80um. Before applying the topcoat, apply epoxy micaceous iron intermediate paint on the primer with a film thickness of not less than 140um. S7. Installation and fixing of strip wall: Installation and fixing of strip wall includes using ALC special mortar for sizing and installing boards, ensuring that the joints are full and installed in order; and ensuring that the verticality and flatness of the wall panels are controlled within ±4mm by cutting and patching boards, fixing with pipe clamps and bonding with ALC mortar; after installation, use special tools to calibrate the wall panels to ensure that their flatness and verticality meet the standards; S8. Jointing and repairing of strip wall: After installing the wall panels, check the flatness and verticality of the wall. Repair the damaged board surface and edges with repair powder. The color and texture should be consistent with the board product, and the performance should match. S9. Hanging mesh: After the water and electricity slots are completed, take out the wooden wedges, fill and level the V-shaped seams of the wall panels, and then hang the mesh. Use alkali-resistant glass fiber mesh cloth with a width of not less than 100mm between the boards and not less than 200mm at the junction of the board and the main body to press into the anti-cracking mortar to prevent cracking at the joints. The alkali-resistant glass fiber mesh cloth is 100g~120g / ㎡ S10. Inspection and acceptance: The surface of the strip wall is flat and smooth, the color is uniform and clean, and the joints are even and straight; the holes, grooves, and boxes on the strip wall are correctly positioned, the cuts are square, the edges are neat, the strip wall joints are properly processed, the installation is vertical and flat and meets the requirements, the position is correct, and there are no cracks or missing boards.

2. The method for installing square steel columns and ring beams of autoclaved aerated concrete exterior wall panels according to claim 1 is characterized in that: In S2, for the strip wall that needs to be installed later, the same position line should be returned to the bottom of the structural beam. If double lines can be placed, double lines should be placed both above and below. For the installation of the strip wall panels, the squareness of the room should be considered. When connecting parallel to the unplastered walls, beams, and columns, attention should be paid to the thickness of the plaster layer.

3. The method for installing square steel columns and ring beams of autoclaved aerated concrete exterior wall panels according to claim 1 is characterized in that: The anchor bolt construction steps in S4 are as follows: a. Drilling: Drill holes according to the hole diameter and hole depth requirements. The drilling tool is an electric drill or a water drill. When drilling, the drill rig and the drill bit must be perpendicular to the surface of the substrate; the hole diameter and hole depth must be accurate, and the deviation of the vertical hole or horizontal hole should be less than 2°; b. Hole cleaning: First clean the hole with a brush, then use an air pump to blow out the dust in the hole, repeat at least three times until no dust escapes. If the hole wall is wet, the curing time needs to be doubled to ensure that there is no visible water in the hole; c. Place the glass tube: Place the glass tube into the hole, with the part with more space in the glass tube facing outwards, making sure it reaches the bottom of the hole; d. Install the screw: After the glass tube is placed, connect the screw to the drill through the bit, set the drill to the rotation + hammer gear at 750 rpm, screw the screw into the hole to the marking ring, and visually observe a small amount of glue overflowing.

4. The method for installing square steel columns and ring beams of autoclaved aerated concrete exterior wall panels according to claim 1 is characterized in that: When connecting in S5, angle steel can be used in combination with welding to temporarily fix the square steel ring beam; after installing the square steel columns and square steel ring beam, use a level to adjust the horizontality and verticality of the steel frame to ensure that the strip wall will not be tilted or distorted after installation.

5. The method for installing square steel columns and ring beams of autoclaved aerated concrete exterior wall panels according to claim 1 is characterized in that: The specific construction method for installing and fixing the S7 middle strip wall is: a. Sizing and panel installation: Apply 8-10mm thick ALC special mortar to the convex grooves of the wall panels to be installed, the structural columns and the floor baseline; move the wall panels to the position where the mortar has been applied; b. Cutting and patching: When the width of the wallboard is less than that of a whole board, a patching board should be used, and the width of the patching board should not be less than 200mm; if there are door and window openings on the partition wall, start from the opening to both sides; align the lower end of the board with the ink line, use a crowbar at the bottom, pry, tighten the upper end of the board, squeeze the edge of the board tightly, and scrape the extruded mortar flat, so that the board is in a vertical state, and use wooden wedges to fill the bottom of the board; if the height exceeds the standard size of the wallboard, it should be installed with staggered seams; c. Fixing with pipe clamps and ALC special mortar: After the wall panels are installed and corrected, use wooden wedges to temporarily fix the wall panels. Use ALC special mortar to bond the wall panels to the top or bottom of the floor slabs and the upper and lower connections of the wall panels. For areas with waterproofing requirements, concrete guide walls with a height of 200mm are required. d. Correct the flatness: After the wall panels are initially installed, they should be corrected with a special crowbar; use a 2m ruler and infrared to measure the flatness and verticality of the wall, and control the verticality and flatness deviation of the wall panels within ±4mm; check whether the strips are aligned with the positioning lines pre-marked on the top and the ground. After confirming that they are correct, use wooden wedges or stone pieces to squeeze them tightly from the bottom, not too tight, and then withdraw the crowbar.

6. The method for installing square steel columns and ring beams of autoclaved aerated concrete exterior wall panels according to claim 5 is characterized in that: When installing the wall panels, use a crowbar to pry them up from the bottom, force the panels together, squeeze out excess mortar from the joints, and then scrape off the mortar protruding from the wall panel surface to ensure that the joints between the panels are filled with mortar; the top and the tongue and groove on both sides of the partition board are covered with ALC special mortar; install them in sequence from one end of the main wall and column to the other end according to the panel arrangement diagram, and install them from the floor to the top of the floor or the bottom of the beam.

7. The method for installing square steel columns and ring beams of autoclaved aerated concrete exterior wall panels according to claim 5 is characterized in that: The wall panels are connected by the pipe clamp method, with one pipe clamp at the top and one at the bottom, and each piece is 80mm away from the end of the panel; when the pipe clamp is connected to the floor slab, it is connected by nails, and when connected to the square steel ring beam, it is connected by nails or spot welding of the pipe clamp and the steel beam; U-shaped steel clamps are added at the intersection of the side of the strip wall and the square steel column or shear wall, with a spacing of ≤1000, and ALC special mortar is used for caulking.

8. The method for installing square steel columns and ring beams of autoclaved aerated concrete exterior wall panels according to claim 1 is characterized in that: In the S8, V-shaped grouting is used at the joints of the boards to avoid secondary cutting and repairing due to cracking of the board mortar in the later stage. The wooden wedges on the top and the ground must not be removed during grouting; the damaged parts of the board surface and corners are repaired with anti-cracking mortar, and finally the board surface is required to be flat.

9. The method for installing square steel columns and ring beams of autoclaved aerated concrete exterior wall panels according to claim 1, characterized in that: In the S8, the boards with particularly serious corner chipping are preferentially cut and used in non-whole-board areas. When the boards with partially chipped corners are used as whole boards, they need to be repaired after installation. The repair materials are repaired with special adhesives. The positions with larger corner chipping need to be repaired in layers to ensure that the board surface is flat after repair. During the repair process, the loose materials at the corner chipping positions need to be removed to ensure that the repair materials can be tightly combined with the board after repair.

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