Concrete frame assembled light steel composite truss supporting steel mesh mortar-pearlite-polyphenyl composite enclosure wall and method

Abstract

The application discloses a concrete frame assembled light steel combined truss supporting steel mesh frame mortar-pearlite-polyphenyl composite enclosure wall and a method, and relates to the technical field of assembled concrete building structure engineering. The wall comprises a steel mesh mortar-pearlite surface layer, a load-bearing steel mesh frame, a light steel combined truss, a self-tapping screw block connecting joint and an assembled concrete column. The load-bearing steel mesh frame is horizontally provided with outer steel mesh welded at the outer end points of the horizontal web wires and the inclined web wires, and penetrates the pearlite layer and the polyphenyl layer to be welded with the inner steel mesh, and is anchored in the inner concrete mortar layer. The light steel combined truss is a truss composed of the steel mesh mortar layer, a broken bridge self-tapping screw web member and a light steel frame chord member. The self-tapping screw block connecting structure of the concrete column composite wall section is a structure in which the connecting steel plate welded on the hoop reinforcement of the concrete column is connected to the force transmission steel plate welded on the steel mesh of the inner concrete mortar layer of the wall section through self-tapping screws. The application has good seismic resistance, fire resistance, heat insulation, waterproofness and weather resistance.

Description

Technical Field

[0001] This invention belongs to the field of prefabricated concrete building structure engineering technology, and more specifically, it relates to a prefabricated light steel composite truss supporting a steel wire mesh mortar-perlite-polystyrene composite enclosure wall and its construction method. Background Technology

[0002] Developing ultra-low energy consumption green prefabricated buildings is an important way to promote the industrialization of construction and housing. Multi-story and high-rise prefabricated concrete frame structures are widely used in residential and public buildings, but the innovative development of matching prefabricated insulation and energy-saving components lags behind. Problems such as low thermal performance and low integration of the building envelope in ultra-low energy consumption buildings still exist. Existing technical bottlenecks include: 1. The lightweight infill wall panels in traditional prefabricated concrete structures are relatively heavy, have relatively poor insulation, and are prone to cracking due to incoordination between the frame and the lightweight infill wall panels. 2. Traditional external wall insulation structures are prone to detachment under wind loads and long-term loads, and have poor weather resistance. In recent years, safety accidents caused by large-scale detachment of external wall insulation layers have occurred frequently, easily resulting in injuries to pedestrians or damage to property. 3. Deformation of ultra-thick insulation layers under long-term loads is difficult to control. Furthermore, some regions in China have strictly limited the application height of thin-plastered external wall insulation systems and require that ceramic facing bricks be prohibited in the finishing layer of thin-plastered external wall insulation systems to avoid the risk of detachment. 4. Traditional external insulation walls have poor fire resistance, and most external insulation structures lack a fireproof layer. 5. Traditional connection technologies cannot solve the connection between the steel wire mesh frame, inner and outer leaf mortar layer, perlite-polystyrene insulation composite wall section, and the concrete frame. Traditional grouting sleeve connection technology cannot connect the fine and dense steel mesh in the thin concrete slab to the concrete frame beams and columns, while embedded part-bolt connection technology can cause cold bridges, reducing the insulation performance of the composite wall. 6. Traditional external insulation board joints and openings are difficult to treat, and water leakage at the joints is a serious problem, easily causing the insulation structure to loosen and detach. Therefore, developing a multifunctional integrated prefabricated concrete frame exterior wall system, and further developing composite exterior walls that integrate decoration, fireproofing, waterproofing, heat insulation, and weather resistance, is a major requirement for the development of prefabricated green buildings. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes a prefabricated lightweight steel composite truss supporting a steel wire mesh mortar-perlite-polystyrene composite enclosure wall, suitable for the exterior walls of ultra-low energy consumption buildings with window openings in concrete frame structures. Specifically, the prefabricated insulation wall section combined with the prefabricated concrete columns uses a lightweight steel frame with a steel wire mesh mortar surface layer, perlite, and polystyrene insulation exterior wall panel. The infill wall section between the prefabricated concrete columns uses a steel wire mesh inner and outer leaf mortar surface layer sandwiched with perlite-polystyrene insulation composite wall section. The steel wire mesh mortar surface layer-perlite is thin, lightweight, and has good fire resistance and thermal insulation performance. The truss, composed of a steel wire mesh mortar layer, thermally broken self-tapping screw web members, and a frame lightweight steel chord, can support the weight of the mortar, fireproofing, and insulation layers of the shear wall, effectively limiting the downward shear deformation of the mortar layer under long-term loads. The steel wire mesh frame with inner and outer mortar layers and perlite-polystyrene insulation composite infill wall section, which is semi-embedded in the concrete frame, is lightweight and can work and deform together with the concrete frame structure.

[0004] The adopted technical solution is: a prefabricated light steel composite truss concrete frame supporting a steel wire mesh frame mortar-perlite-polystyrene composite enclosure wall, including:

[0005] Precast concrete column: A precast concrete column made by pouring concrete into a concrete column reinforcement cage, which is connected to a precast concrete beam through a concrete post-pouring strip at the beam-column joint.

[0006] Precast concrete beams: precast concrete beams made by pouring concrete into a concrete beam reinforcement cage, which are connected to the precast concrete floor slab through post-cast concrete strips.

[0007] Prefabricated concrete column-light steel frame composite wall section: The light steel frame, formed by welding vertical and horizontal C-shaped steel bars, is cast into the precast concrete column. Horizontal countersunk self-tapping screws and combined countersunk self-tapping screws pass sequentially through the steel wire mesh mortar surface layer composed of the outer leaf mortar layer and the outer leaf steel wire mesh, perlite board, polystyrene insulation board, and the inner steel wire mesh mortar surface layer composed of the inner leaf connecting mortar layer and the inner leaf steel wire mesh, self-tapping to connect the light steel frame and extending into the precast concrete column for anchoring. The inner leaf steel wire mesh is welded to the light steel frame via U-shaped steel wire. The horizontal web wires, diagonal web wires, and outer leaf steel wire mesh of the steel wire mesh frame are welded together, passing sequentially through the perlite board and polystyrene insulation board, and welded to the inner leaf steel mesh and anchored in the inner leaf concrete mortar layer. The prefabricated concrete column-light steel frame composite wall section is connected to the precast concrete column via column self-tapping screw block connection nodes.

[0008] Composite infill wall segment: The horizontal and diagonal webs of the steel wire mesh frame are welded to the outer leaf of the infill wall steel wire mesh and pass through the outer leaf of the infill wall mortar, the perlite board of the infill wall, and the polystyrene insulation board of the infill wall in sequence. They are then welded to the inner leaf of the infill wall steel mesh and anchored to the inner leaf of the infill wall concrete mortar. The steel wire mesh frame connects the various structural layers to form the composite infill wall segment. The composite infill wall segment is connected to adjacent wall segments through the self-tapping screw block connection nodes between the infill wall and the concrete column wall segment, and to the precast concrete beam through the self-tapping screw block connection nodes between the infill wall and the beam.

[0009] The outer steel wire mesh of the prefabricated concrete column light steel frame composite wall section and the composite infill wall section, as well as the outer steel wire mesh of the infill wall, are connected by a strip after the outer steel wire mesh cement mortar layer is applied.

[0010] Preferably, the precast concrete column is a prefabricated concrete column component manufactured in a factory, with a square or rectangular cross-section and a cross-sectional width greater than or equal to 400mm. The internal concrete column reinforcement cage consists of longitudinal reinforcing bars and stirrups. The longitudinal reinforcing bars are steel bars with a diameter greater than or equal to 20mm, and the column cross-section reinforcement ratio is greater than or equal to 0.25%. The column stirrups are steel bars with a diameter of 10mm and a spacing of 200mm. The stirrups are reinforced at the post-cast concrete strip at the beam-column joint and in the upper 500mm range, with a stirrup spacing of 100mm. The lower end joint of the precast concrete column is at the floor level, and the upper end joint is at the lower surface level of the beam.

[0011] The precast concrete beam is an assembled monolithic precast composite beam component, which is internally equipped with a concrete beam reinforcement cage. The concrete beam reinforcement cage consists of longitudinal steel bars with a diameter of 16mm and stirrups with a diameter of 10mm and a spacing of 200mm. The longitudinal steel bars extend into the concrete post-cast strip of the beam-column joint and are anchored by anchor plates. The stirrups at the beam ends are densified, and the stirrup spacing in the densified area is 100mm. The width of the precast concrete beam is 0.7 times the width of the precast concrete column in the same direction. When the precast concrete beam is manufactured in the factory, only the lower part of the concrete is poured, and the upper part is reserved for the thickness of the floor slab without pouring concrete. The longitudinal reinforcement and stirrups of the beam are exposed, serving as the post-cast strip of the beam-slab concrete during construction.

[0012] The precast concrete floor slab is an assembled floor slab component connected to a precast concrete beam. Its steel mesh extends out of the slab end and passes through the exposed longitudinal bars and some stirrups on the upper part of the precast concrete beam, and is anchored in the post-cast concrete strip of the beam and slab.

[0013] Preferably, the vertical and horizontal C-shaped steel sections of the light steel frame are welded together from C-shaped steel sections with a vertical and horizontal spacing of no more than 800mm. The light steel frame is connected to the inner leaf wire mesh by spot welding with 2mm diameter U-shaped steel wires at a 10mm clear distance, with the horizontal and vertical spot welding spacing not exceeding 200mm. The keel C-shaped steel section is 70mm high, 50mm wide, and at least 2mm thick. The light steel frame flange is 140mm wide and 60mm high. The groove forms a protruding steel section with a clear spacing of 140mm, a height of 60mm, and a width of 60mm. The C-shaped steel of the light steel frame is anchored into the precast concrete column from a position 10mm away from the outermost distributed steel bars between the stirrups and longitudinal reinforcing bars of the precast column. The 10mm full-height section of the light steel frame with the protruding steel section is embedded 10mm into the column concrete, and the protruding steel section is anchored in the column concrete for 60mm. To facilitate the connection of self-tapping screws to the web of the light steel frame keel, a circular hole smaller than the diameter of the self-tapping screw is opened on the web of the light steel frame to allow the self-tapping screw to pass through.

[0014] Preferably, the inner leaf connecting mortar layer and the inner leaf wire mesh are mortar layers that bond the polystyrene insulation board dovetail groove to the precast concrete column. The net distance between the inner leaf wire mesh and the polystyrene insulation board with dovetail groove is 10mm. A 14mm thick mortar with a strength greater than or equal to C20 and a rough surface is used to smooth the gap between the inner leaf wire mesh and the dovetail groove of the polystyrene insulation board. The U-shaped steel wire is the connection structure between the inner leaf wire mesh and the light steel frame. Its bent flange is spot welded to the inner leaf wire mesh wire, and the web is welded to the light steel frame.

[0015] The inner leaf concrete mortar layer is the inner leaf of the wall that extends outward from the concrete column composite wall section and is perpendicular to the surface of the concrete column. The inner leaf concrete mortar layer is 50mm thick and is equipped with an inner leaf steel mesh with a diameter of 4mm and a spacing of 200mm. The inner leaf steel mesh is bent and extends into the inner leaf to connect the mortar layer and overlap the inner leaf steel mesh by 100mm. The inner leaf steel mesh is connected to the precast concrete column through column self-tapping screw block connection nodes.

[0016] The outer leaf mortar layer is a 25mm thick mortar layer with a strength greater than or equal to C20 on the outside of the wall panel. The outer leaf mortar layer has an inner outer leaf steel wire mesh with a diameter of 2mm and a spacing of 50mm. The net protective layer of the steel wire mesh in mortar is 10mm.

[0017] The polystyrene insulation board is a polystyrene insulation board with dovetail grooves at the connection with the inner leaf connecting mortar layer; the perlite board is a fireproof layer for the wall panel with a thickness of 25mm.

[0018] Preferably, the inner leaf of the infill wall concrete mortar is provided with a steel mesh of 4mm diameter and 200mm spacing. The inner leaf of the infill wall concrete mortar is connected to the left and right adjacent wall segments through the self-tapping screw block connection node between the infill wall and the concrete column wall segment, and is connected to the upper and lower precast concrete beams through the self-tapping screw block connection node between the infill wall and the beam.

[0019] The horizontal and oblique webs of the steel wire mesh frame are supporting reinforcing wires that connect the inner and outer leaf steel wire meshes of the concrete column composite wall section, and also support reinforcing wire frames that connect the outer leaf steel wire mesh of the infill wall section and the inner leaf steel wire mesh of the infill wall. The steel wire mesh frame is composed of horizontal webs with a diameter of 2mm and oblique webs at an upward angle of 45 degrees, which are spot-welded to the inner leaf steel wire mesh and the outer leaf steel wire mesh. The webs penetrate the perlite board and the polystyrene insulation board and extend into the concrete mortar surface layer.

[0020] The outer leaf of the infill wall mortar is a 25mm thick mortar layer with a strength of not less than C20 on the outside of the composite infill wall panel. The outer leaf of the infill wall mortar has a built-in steel wire mesh with a diameter of 2mm and a spacing of 50mm. The net protective layer of the steel wire mesh in the mortar is 10mm.

[0021] Preferably, the outer leaf steel wire mesh cement mortar layer post-plaster strip is a connection structure for the outer leaf mortar layer of adjacent concrete column composite wall sections and infill composite wall sections. A 75mm wide mortar post-plaster strip is reserved at the end of the outer leaf mortar layer of the concrete column composite wall section and the end of the outer leaf of the infill wall mortar layer of the infill composite wall section. A 150mm wide reinforcing steel wire mesh with a diameter of 2mm and a spacing of 50mm is tied in the 150mm mortar post-plaster strip at the joint of adjacent wall panels, and the strip is smoothed with mortar. At the joint position of the outer insulation layer of the wall panels, the perlite boards are butted together, and the tongue and groove of the polystyrene insulation boards are butted together after applying cement-based mortar.

[0022] Preferably, the column self-tapping screw block connection node is a connection structure between the inner leaf concrete mortar layer and the side of the precast concrete column. An L-shaped force-transmitting steel plate is welded to the stirrups of the concrete column reinforcement cage, which also serves as a connecting steel plate. The flange connection area of ​​the L-shaped force-transmitting steel plate has a hole smaller than the diameter of the self-tapping screw. A flat steel plate is welded to the inner leaf reinforcement mesh as a force-transmitting steel plate. The inner leaf concrete mortar layer has a groove reserved on the outside of the flat steel plate welded to the inner flat reinforcement mesh. When precasting components, the composite wall section is pushed in from the outside and welded to the concrete column reinforcement cage with a light steel frame. The L-shaped connecting steel plate on the concrete column reinforcement cage enters the groove. Self-tapping screws are used to pass through the self-tapping screw holes on the L-shaped steel plate to self-tap and connect the flat steel plate on the inner leaf reinforcement mesh. The groove is then smoothed with high-performance mortar.

[0023] The aforementioned horizontal countersunk self-tapping screw connectors and combined countersunk self-tapping screw connectors are web members of the light steel composite truss; the connectors are countersunk fiber composite connectors with a countersunk dimension of not less than 50mm, penetrating the perlite-polystyrene insulation layer, and self-tapping connected to the light steel frame; the countersunk fiber composite connectors consist of a 3mm x 60mm x 60mm outer square plate, a stepped 4mm x 46mm x 46mm square plate, a centrally located hollow round bar with an outer diameter of 14mm, an inner diameter of 10mm, and a length of 50mm, and a centrally located hollow round bar with an outer diameter of 14mm, an inner diameter of 6mm, and a length of 20mm. The formed connectors; the angle between the square plate and the hollow round rod of the countersunk fiber composite connector of the horizontal countersunk self-tapping screw connector is 90 degrees; the angle between the rectangular plate and the hollow round rod of the countersunk fiber composite connector of the combined countersunk self-tapping screw connector is divided into two types: 90 degrees through the horizontal long self-tapping screw and 45 degrees through the oblique upward long self-tapping screw; the steel self-tapping screw has a head diameter of 10mm, a shank diameter of 6mm, and is threaded throughout; horizontal countersunk self-tapping screw connectors are arranged at the top and bottom of the vertical C-shaped steel of the light steel frame, and combined countersunk self-tapping screw connectors are arranged in the middle;

[0024] The self-tapping screw block connection node between the infill wall and the concrete column wall section is a connection structure between the inner leaf of the infill wall concrete mortar and the composite wall section of the concrete column. The connecting steel plate with self-tapping screw holes is placed in the groove of the inner leaf concrete mortar layer. Self-tapping screws are passed through the self-tapping screw holes of the connecting steel plate to connect the force transmission steel plate welded to the inner leaf steel mesh of the infill wall and the force transmission steel plate welded to the inner leaf steel mesh of the composite wall section of the concrete column. The groove is then filled with high-performance mortar.

[0025] The self-tapping screw block connection node between the infill wall and the beam is an L-shaped force-transfer steel plate with bolt holes welded to the stirrups of the concrete beam's reinforcing cage, which also serves as a connecting steel plate. It is attached to the flat steel pipe welded to the inner leaf of the infill wall's concrete mortar through the groove, and the force-transfer flat steel plate welded to the inner leaf of the infill wall's reinforcing mesh is connected by self-tapping screws. The L-shaped force-transfer steel plate connected to the upper end of the infill wall is welded to the lower side of the stirrups and pre-embedded in the beam. The L-shaped force-transfer steel plate connected to the lower end of the infill wall is welded to the upper side of the beam's stirrups. After the beam and slab concrete is poured, the strip is cast and the L-shaped force-transfer steel plate is anchored in the beam.

[0026] The construction method for a prefabricated light steel composite truss-supported steel wire mesh mortar-perlite-polystyrene composite enclosure wall includes the following steps:

[0027] I. Fabrication process of prefabricated concrete column composite wall segments, precast beams and floor slabs

[0028] Step 1: The factory processes light steel frames, ties concrete column reinforcement cages, concrete beam reinforcement cages, and floor slab reinforcement mesh, purchases polystyrene insulation boards and perlite boards, and cuts and assembles them to the required size; prepares outer leaf steel wire mesh, inner leaf steel wire mesh, and inner leaf reinforcement mesh; prepares wire mesh frame web wires and window frame mortar strip reinforcement mesh with welded force-transmitting steel plates; and prefabricates horizontal countersunk thermal break long self-tapping screw connectors and combined countersunk thermal break long self-tapping screw connectors.

[0029] Step 2: Install and position the light steel frame on the prefabricated concrete column reinforcement cage, and connect the inner leaf steel wire mesh to the light steel frame using U-shaped steel wires; weld horizontal force transmission steel plates to the inner reinforcement mesh, and weld L-shaped force transmission steel plates with self-tapping screw holes to the stirrups of the concrete column reinforcement cage; use self-tapping screws to connect the force transmission steel plates on the inner steel wire mesh by passing them through the self-tapping screw holes of the L-connecting plates; use engineering plastic spacers to space the thickness of the inner mortar layer between the light steel frame and the dovetail groove of the polystyrene insulation board, and position the polystyrene insulation board, perlite board, and outer leaf steel wire mesh.

[0030] Step 3: Pass the horizontal and diagonal web wires of the wire mesh frame through the perlite board and polystyrene insulation board in sequence. Spot weld the two ends of the web wires of the wire mesh frame to the outer leaf wire mesh and the inner leaf reinforcing mesh to form a wire mesh frame. Pass the horizontal thermal break self-tapping screw connector and the long self-tapping screw connector of the combined thermal break self-tapping screw in sequence through the perlite board and polystyrene insulation board, connect the self-tapping screw to the light steel frame, and extend into the concrete column for a certain anchorage distance.

[0031] Step 4: Pour the inner and outer mortar surface layers, leave mortar strips on the top, bottom, left and right sections of the wall, and cure them;

[0032] Step 5: Using the steel wire mesh mortar-perlite-polystyrene insulation structure as the bottom formwork, pour the precast column concrete, and at the same time pour the precast beam and floor slab concrete, and then cure it.

[0033] II. Preparation process of steel wire mesh supporting mortar-perlite-polystyrene thermal insulation composite infill wall

[0034] Step 6: Process the outer leaf steel wire mesh of the infill wall, the perlite board of the infill wall, the polystyrene insulation board of the infill wall, and the inner leaf steel mesh of the concrete mortar; weld one end of the horizontal and diagonal web wires of the steel wire mesh frame to the outer leaf steel wire mesh of the infill wall, and then pass it through the perlite board, polystyrene insulation board and weld it to the inner leaf steel mesh in sequence; weld the force transmission steel plate on the inner leaf steel mesh of the concrete mortar.

[0035] Step 7: The outer leaf of the composite wall mortar and the inner leaf of the composite wall concrete mortar are poured in the factory. The outer leaf of the infill wall mortar is reserved for later application of mortar strips. The inner leaf of the infill wall concrete mortar has a groove reserved on the outside of the force transmission steel plate welded to the steel mesh.

[0036] Step 8: Curing the mortar-perlite-polystyrene insulation composite infill wall supporting the wire mesh frame and transporting it to the construction site;

[0037] III. Assembly and Construction Process

[0038] Step 9: Hoist and position the precast concrete columns and composite wall sections, and lap and tie the longitudinal reinforcing bars in the post-cast areas of the upper and lower concrete columns; hoist and position the precast concrete beams and concrete floor slabs, extend the longitudinal reinforcing bars with anchor plates at the ends of the precast concrete beams into the post-cast strip of the beam-column joint area, and insert the reinforcing bars of the precast concrete slabs into the reinforcing cage formed by the exposed stirrups and longitudinal bars at the top of the precast beams.

[0039] Step 10: Push the composite infill wall from the side between the adjacent precast concrete column composite wall sections. Connect the force-transfer steel plate welded to the inner leaf reinforcement mesh of the concrete column composite wall section with the force-transfer flat steel plate on the inner leaf reinforcement mesh of the composite infill wall. Place the connecting steel plate with self-tapping screw holes in the mortar layer groove. Use self-tapping screws to pass through the self-tapping screw holes of the connecting steel plate to connect the force-transfer steel plate. Attach the L-shaped force-transfer steel plate on the precast beam tightly to the force-transfer flat steel plate on the inner leaf reinforcement mesh of the composite infill wall. Use self-tapping screws to pass through the self-tapping screw holes of the L-shaped connecting plate to connect the force-transfer steel plate. Use high-performance mortar to smooth the groove on the inner concrete mortar surface.

[0040] Step 11: Tie additional steel reinforcement strips in the mortar strip between the precast concrete column composite wall section and the composite infill wall section, and then smooth the mortar strip with high-performance thermal insulation mortar; pour the post-cast concrete strips of the beam-column joint and the beam-slab concrete strips, and cure them.

[0041] Step 12: Apply exterior wall paint to the exterior surface of the wall and apply interior decorative finish to the interior surface.

[0042] The beneficial effects of adopting the above technical solution are as follows:

[0043] 1. The wire mesh mortar-perlite surface layer solves the problem of poor fire resistance of traditional external insulation walls. Perlite boards have the advantages of good fire resistance and heat insulation, and the high-performance mortar layer has good structure, waterproof and weather resistance.

[0044] 2. The light steel composite truss, load-bearing steel wire mesh frame structure and self-tapping screw connection structure of composite wall and column can effectively resist the downward shear deformation of mortar layer under long-term load, and can control this shear deformation in each floor and not transmit it downward, thus solving the technical bottleneck problem of difficult deformation control of ultra-thick insulation layer under long-term load.

[0045] 3. The steel wire mesh frame with inner and outer leaf mortar surface layer sandwiched perlite-polystyrene thermal insulation composite filling wall section overcomes the technical difficulties of relatively large weight of lightweight wall panel filling between columns, relatively poor thermal insulation, and easy cracking due to uncoordinated deformation between the frame and the filling lightweight wall panel.

[0046] 4. The self-tapping screw block connection node of the composite infill wall solves the connection problem between the fine and dense steel mesh in the inner mortar layer of the composite infill wall and the composite wall section of the concrete beam and concrete column, and has good stress performance; at the same time, it can effectively resist the shear deformation of the mortar layer under long-term load, and control the gravity load of the external insulation structure of the infill wall to be controlled in this layer and not transmitted downward.

[0047] The steel wire mesh mortar strip in the 5-combination connection structure enhances the integrity of the wall panel mortar surface layer, solves the problem of splicing joints in traditional insulation boards, improves the waterproof performance of the wall panel, and gives the wall panel insulation structure good weather resistance; the insulation board can be used as a template for the post-pouring strip, which facilitates assembly and construction. Attached Figure Description

[0048] Figure 1 This is a structural schematic diagram of a prefabricated concrete frame, light steel frame, wire mesh, mortar surface layer, perlite, and polystyrene insulation composite exterior wall.

[0049] Figure 2 yes Figure 1 Schematic diagrams of cross-sectional structures 1-1, 2-2, and 3-3 in the diagram;

[0050] Figure 3 yes Figure 1 Schematic diagrams of cross-sectional structures 4-4, 5-5, and 6-6 in the diagram;

[0051] Figure 4 This is a structural schematic diagram of a concrete lightweight steel frame steel wire mesh mortar surface layer-perlite-polystyrene insulation composite wall section;

[0052] Figure 5 This is another structural schematic view of a concrete lightweight steel frame steel wire mesh mortar surface layer-perlite-polystyrene insulation composite wall section;

[0053] Figure 6 This is a structural schematic diagram of a composite infill wall segment;

[0054] Figure 7 This is another structural schematic view of the composite infill wall section;

[0055] Figure 8 This is a schematic diagram of the self-tapping screw block connection structure between the composite infill wall and the precast reinforced concrete composite beam;

[0056] Figure 9 This is a schematic diagram of the assembly and connection structure between precast concrete column composite wall segments and composite infill walls;

[0057] Figure 10 This is a schematic diagram of the joint connection structure of a prefabricated concrete frame;

[0058] Figure 11 This is a schematic diagram of the assembly and connection structure of precast concrete columns and composite wall panels;

[0059] Figure 12 This is a schematic diagram of the assembly and connection structure of composite walls, precast concrete beams, and precast floor slabs;

[0060] In the diagram: 1. Precast concrete column; 2. Concrete column reinforcement cage; 3. Vertical C-shaped steel of light steel frame; 4. Horizontal C-shaped steel of light steel frame; 5. Inner leaf connecting mortar layer; 6. Inner leaf wire mesh; 7. Inner leaf concrete mortar layer; 8. Inner leaf reinforcement mesh; 9. U-shaped steel wire; 10. Polystyrene insulation board; 11. Perlite board; 12. Outer leaf mortar layer; 13. Outer leaf wire mesh; 14. Column self-tapping screw block connection node; 15. Horizontal countersunk thermal break self-tapping screw connector; 16. Combined countersunk thermal break self-tapping screw connector; 17. Horizontal web wire of wire mesh frame; 18. Diagonal web wire of wire mesh frame. 19. Outer leaf of infill wall mortar layer; 20. Outer leaf of infill wall steel wire mesh; 21. Perlite board of infill wall; 22. Polystyrene insulation board of infill wall; 23. Inner leaf of infill wall concrete mortar; 24. Inner leaf of infill wall steel mesh; 25. Self-tapping screw block connection node between infill wall and concrete column wall section; 26. Precast concrete beam; 27. Reinforcing cage of concrete beam; 28. Precast concrete floor slab; 29. ​​Self-tapping screw block connection node between infill wall and beam; 30. Outer leaf steel wire mesh cement mortar layer post-applied strip; 31. Concrete post-pouring strip of beam-column joint; 32. Concrete post-pouring strip of beam-slab. Detailed Implementation

[0061] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0062] The prefabricated reinforced concrete column, light steel frame, wire mesh mortar surface layer, perlite, and polystyrene insulation composite exterior wall mainly consists of a wire mesh mortar-perlite surface layer, a load-bearing wire mesh frame, a light steel composite truss, self-tapping screw block connection nodes, and prefabricated concrete columns. The wire mesh mortar-perlite surface layer comprises 25mm thick layers of wire mesh mortar and a perlite fireproof layer, providing excellent earthquake resistance, fire resistance, heat insulation, waterproofing, and weather resistance. The light steel composite truss is composed of a wire mesh mortar layer, thermally broken self-tapping screw web members, and light steel frame chord members. The light steel composite truss consists of a 25mm thick wire mesh mortar layer strip outer chord, a vertical C-shaped steel inner chord of the light steel frame, horizontal web members with countersunk thermally broken long self-tapping screws (diameter not less than 5mm), and web members angled upwards at 45 degrees. The light steel composite truss effectively controls the self-weight of the mortar surface layer of the exterior wall section connected to the concrete columns, preventing it from being transferred downwards. The load-bearing steel wire mesh frame consists of horizontal web wires with a diameter of 2mm and web wires angled upwards at 45 degrees, with the outer ends welded to the outer wire mesh. This outer wire mesh penetrates the perlite layer and polystyrene layer before being spot-welded to the inner reinforcing mesh, and is then anchored within the inner concrete mortar layer. The prefabricated concrete column composite wall segment's self-tapping screw block connection structure comprises an L-shaped connecting steel plate with self-tapping screw holes welded to the concrete column stirrups, which also serves as a force-transmitting steel plate. This connection is achieved by self-tapping screws connecting the force-transmitting steel plate welded to the reinforcing mesh within the concrete mortar layer of the wall segment.

[0063] The prefabricated concrete columns are sandwiched between steel wire mesh mortar layers and perlite-polystyrene insulation composite wall sections. From the exterior to the interior, the structure consists of an outer layer of steel wire mesh mortar, a perlite board, a polystyrene insulation layer, and an inner layer of reinforced concrete mortar. This is a semi-embedded polystyrene sandwich composite wall panel. The outer layer of the steel wire mesh mortar is flush with the outer layer of the concrete column wall section. The inner part of the composite infill wall section, including the polystyrene board and the reinforced concrete mortar layer, is embedded within the frame. The inner layer of the reinforced concrete mortar layer is connected to the upper and lower concrete beams and the left and right wall sections via self-tapping screws. The inner layer of the reinforced concrete mortar in the composite infill wall is connected to the upper and lower connecting beams and the left and right composite shear walls via self-tapping screws. The outer layer of the reinforced concrete mortar is connected to the adjacent upper and lower wall panels and the left and right concrete column composite wall sections using additional steel wire mesh and then plastered with mortar strips. The steel wire mesh overlaps in the plastered mortar strip area.

[0064] The prefabricated composite connection structure includes the assembly structure of the post-cast strip at the joint of the upper and lower concrete columns and beam ends, and the connection structure of the post-cast mortar strip of the upper and lower concrete column composite wall section in this area. The insulation board of the concrete column composite wall section can be used as the template for the post-cast strip of the upper and lower columns and the joint area at both ends; the post-cast strip of the outer steel wire mesh mortar surface layer of the upper and lower composite insulation wall sections and the connection structure of the post-cast strip of the prefabricated beam and floor slab in this area. The insulation board of the composite insulation wall section can be used as the outer template for the post-cast strip of the precast beam and floor slab assembly; the connection structure of the composite insulation wall section with the outer steel wire mesh mortar surface layer of the composite wall section of the left and right adjacent concrete column composite wall sections; the connection structure of the composite insulation wall section with the inner steel wire mesh concrete mortar surface layer of the composite wall section of the left and right adjacent concrete column composite wall sections; and the connection structure of the inner steel wire mesh concrete mortar surface layer of the concrete column composite wall section with the self-tapping screw block of the upper and lower concrete beams.

[0065] like Figure 1-12 The specific structure and connection relationships of the above parts are as follows:

[0066] Precast concrete column: A precast concrete column 1 is made by pouring concrete into a concrete column reinforcement cage 2, and is connected to a precast concrete beam 26 through a post-cast concrete strip 31 at the beam-column joint. The precast concrete column 1 is a precast concrete column component manufactured in a factory. Its cross-sectional shape can be square or rectangular, with a cross-sectional width of not less than 400mm. It contains a concrete column reinforcement cage 2, which consists of longitudinal reinforcing bars and stirrups. The longitudinal reinforcing bars use Φ20 or larger diameter steel bars, and the column cross-section reinforcement ratio is not less than 0.25%. The column stirrups are 10mm in diameter and spaced 200mm apart. Stirrups are reinforced at the post-cast concrete strip 31 at the beam-column joint and within the upper 500mm range, with a stirrup spacing of 100mm. The lower joint of the precast concrete column 1 is at the floor level, and the upper joint is at the lower surface level of the beam.

[0067] Precast concrete beam: A precast concrete beam 26 is made by pouring concrete into a concrete beam reinforcement cage 27, and is connected to a precast concrete floor slab 28 via a post-cast concrete strip 32. The precast concrete beam 26 is an assembled monolithic precast composite beam component, internally equipped with a concrete beam reinforcement cage 27. The concrete beam reinforcement cage 27 consists of longitudinal steel bars with a diameter of 16mm and stirrups with a diameter of 10mm and a spacing of 200mm. The longitudinal steel bars extend into the post-cast concrete strip 31 at the beam-column joint and are anchored using anchor plates. The stirrups at the beam ends are denser, with a stirrup spacing of 100mm in the denser area. The width of the precast concrete beam 26 is 0.7 times the width of the precast concrete column 1 in the same direction. During factory fabrication, only the lower part of the precast concrete beam 26 is poured; the upper part, reserved for the floor slab thickness, is not poured. The longitudinal reinforcement and stirrups are exposed, serving as the post-cast concrete strip 32 during construction.

[0068] The precast concrete floor slab 28 is an assembled floor slab component connected to the precast concrete beam 26. Its steel mesh extends out of the slab end and passes through the exposed longitudinal bars and some stirrups on the upper part of the precast concrete beam 26, and is anchored in the post-cast concrete strip 32 of the beam and slab.

[0069] Prefabricated concrete column-light steel frame composite wall section: The light steel frame, formed by welding vertical C-shaped steel 3 and horizontal C-shaped steel 4, is cast into the precast concrete column 1. Horizontal countersunk self-tapping screw connectors 15 and 16 pass sequentially through the steel wire mesh mortar surface layer composed of outer leaf mortar layer 12 and outer leaf steel wire mesh 13, perlite board 11, polystyrene insulation board 10, and the inner steel wire mesh mortar surface layer composed of inner leaf connecting mortar layer 5 and inner leaf steel wire mesh 6, self-tappingly connecting the light steel frame and extending into the precast concrete column 1 for anchoring. The inner leaf steel wire mesh 6 is welded to the light steel frame via U-shaped steel wire 9. Horizontal web wires 17 and diagonal web wires 18 of the steel wire mesh frame are welded to the outer leaf steel wire mesh 13, sequentially passing through perlite board 11, polystyrene insulation board 10, and welded to the inner leaf steel mesh 8, and anchored in the inner leaf concrete mortar layer 7. The prefabricated concrete column light steel frame composite wall segment is connected to the precast concrete column 1 through column self-tapping screw block connection node 14.

[0070] The vertical C-shaped steel 3 and horizontal C-shaped steel 4 of the light steel frame are welded together from C-shaped steel with a vertical and horizontal spacing of no more than 800 mm. The light steel frame is connected to the inner leaf wire mesh 6 by spot welding with 2 mm diameter U-shaped steel wires 9 at a distance of 10 mm from the wire mesh, with the horizontal and vertical spot welding spacing not exceeding 200 mm. The keel C-shaped steel has a cross-section of 70 mm high, 50 mm wide, and a plate thickness of not less than 2 mm. The light steel frame has a 140 mm wide and 60 mm high flange groove, forming a protruding steel section with a clear spacing of 140 mm, a height of 60 mm, and a width of 60 mm. The C-shaped steel of the light steel frame is anchored into the precast concrete column 1 from a distance of 10 mm from the outermost distributed reinforcement between the stirrups and longitudinal reinforcing bars of the precast column. The 10 mm full-height section of the light steel frame with the protruding steel section is embedded 10 mm into the column concrete, and the protruding steel section is anchored 60 mm into the column concrete. To facilitate the connection of self-tapping screws to the web of the light steel frame keel, a round hole smaller than the diameter of the self-tapping screw is made in the web of the light steel frame keel so that the self-tapping screw can pass through.

[0071] The horizontal web wires 17 and the diagonal web wires 18 of the wire mesh frame serve as supporting reinforcing wires connecting the inner leaf steel mesh 8 and the outer leaf steel mesh 13 of the concrete column composite wall section. They also serve as supporting reinforcing wire frames connecting the outer leaf steel mesh 20 and the inner leaf steel mesh 24 of the composite infill wall section. The wire mesh frame consists of the inner leaf steel mesh, the outer leaf steel mesh, spot-welded horizontal web wires 17 with a diameter of 2mm, and the diagonal web wires 18 inclined upwards at 45 degrees. The web wires penetrate the perlite board and the polystyrene insulation board before extending into the concrete mortar surface layer.

[0072] Composite infill wall segment: The horizontal web wires 17 and diagonal web wires 18 of the wire mesh frame are welded to the outer leaf wire mesh 20 of the infill wall, passing sequentially through the outer leaf of the infill wall mortar 19, the perlite board 21, and the polystyrene insulation board 22. They are then welded to the inner leaf steel mesh 24 and anchored to the inner leaf of the infill wall concrete mortar 23. The wire mesh frame connects the various structural layers to form the composite infill wall segment. The composite infill wall segment is connected to adjacent wall segments via self-tapping screw block connection nodes 25 between the infill wall and concrete column wall segments, and to precast concrete beams 26 via self-tapping screw block connection nodes 29 between the infill wall and beams.

[0073] The outer leaf steel wire mesh 13 of the prefabricated concrete column light steel frame composite wall section and the composite infill wall section, as well as the outer leaf steel wire mesh 20 of the infill wall, are connected by a strip 30 after the outer leaf steel wire mesh cement mortar layer.

[0074] The inner leaf connecting mortar layer 5 and the inner leaf wire mesh 6 are mortar layers that bond the dovetail groove of the polystyrene insulation board to the precast concrete column 1. The net distance between the inner leaf wire mesh 6 and the polystyrene insulation board 10 with dovetail groove is 10mm. The gap between the inner leaf wire mesh 6 and the dovetail groove of the polystyrene insulation board is smoothed by using 14mm thick mortar with a strength of not less than C20 and a rough surface. The U-shaped steel wire 9 is the connection structure between the inner leaf wire mesh 6 and the light steel frame. Its bent flange is spot welded to the steel wire of the inner leaf wire mesh 6, and the web is welded to the light steel frame.

[0075] The inner leaf concrete mortar layer 7 is the inner leaf of the wall, perpendicular to the surface of the concrete column, extending outward from the concrete column composite wall segment. The inner leaf concrete mortar layer 7 is 50mm thick and contains inner leaf steel mesh 8 with a diameter of 4mm and a spacing of 200mm. The inner leaf steel mesh 8 is bent and extends into the inner leaf connecting mortar layer 5, overlapping the inner leaf steel mesh 6 by 100mm. The inner leaf steel mesh 8 is connected to the precast concrete column 1 via column self-tapping screw block connection nodes 14.

[0076] The outer leaf mortar layer 12 is a 25mm thick mortar layer on the outside of the wall panel with a strength of not less than C20. The outer leaf mortar layer 12 has an inner outer leaf steel wire mesh 13 with a diameter of 2mm and a spacing of 50mm. The mortar protective layer of the steel wire mesh is 10mm thick.

[0077] Polystyrene insulation board 10 is a polystyrene insulation board with dovetail grooves at the connection point with the inner leaf connecting mortar layer 5. Perlite board 11 is a fireproof layer for the wall panel, with a thickness of 25mm.

[0078] The column self-tapping screw assembly connection node 14 is a connection structure between the inner leaf concrete mortar layer 7 and the side of the precast concrete column 1. An L-shaped force-transmitting steel plate, which also serves as a connecting steel plate, is welded to the stirrups of the concrete column reinforcement cage 2. Holes smaller than the diameter of the self-tapping screws are opened in the flange connection area of ​​the L-shaped force-transmitting steel plate. A flat steel plate is welded to the inner leaf reinforcement mesh 8 as a force-transmitting steel plate. A groove is pre-reserved on the outside of the flat steel plate welded to the inner flat reinforcement mesh of the inner leaf concrete mortar layer 7. During precasting, the composite wall segment is pushed in from the outside and welded to the concrete column reinforcement cage with a light steel frame. The L-shaped connecting steel plate on the concrete column reinforcement cage enters the groove. Self-tapping screws are used to pass through the self-tapping screw holes on the L-shaped steel plate, connecting the flat steel plate on the inner leaf reinforcement mesh 8. The groove is then smoothed with high-performance mortar.

[0079] The horizontal countersunk self-tapping screw connector 15 and the combined countersunk self-tapping screw connector 16 are the web members of the light steel composite truss. The connectors are countersunk fiber composite connectors with a recess dimension of not less than 50mm, penetrating the perlite-polystyrene insulation layer, and self-tapping connected to the light steel frame. The countersunk fiber composite connector is a one-piece formed connector consisting of a 3*60*60mm thick outer square plate, a 4*46*46mm stepped square plate, a centrally located hollow round rod with an outer diameter of 14mm, an inner diameter of 10mm, and a length of 50mm, and a centrally located hollow round rod with an outer diameter of 14mm, an inner diameter of 6mm, and a length of 20mm. The angle between the square plate and the hollow round rod of the countersunk fiber composite connector 15 of the horizontal countersunk self-tapping screw connector 15 is 90 degrees. The angle between the rectangular plate and the hollow round rod of the countersunk fiber composite connector 16 of the combined countersunk self-tapping screw connector 16 is either 90 degrees for passing through the horizontal long self-tapping screw or 45 degrees for passing through the obliquely upward long self-tapping screw. The steel self-tapping screw has a 10mm diameter head, a 6mm shank, and is threaded throughout. The horizontal countersunk self-tapping screw connector 15 is arranged at the top and bottom of the vertical C-shaped steel 3 of the light steel frame, and the combined countersunk self-tapping screw connector 16 is arranged in the middle.

[0080] The outer leaf 19 of the infill wall mortar is a 25mm thick mortar layer on the outside of the composite infill wall panel with a strength of not less than C20. The outer leaf 19 of the infill wall mortar has a built-in steel wire mesh 20 with a diameter of 2mm and a spacing of 50mm. The net protective layer of the steel wire mesh in mortar is 10mm.

[0081] The perlite board 21 and the polystyrene insulation board 22 of the infill wall are the fireproof layer and the insulation layer of the composite infill wall, respectively.

[0082] The inner leaf 23 of the infill wall concrete mortar is equipped with a steel mesh 24 with a diameter of 4mm and a spacing of 200mm. The inner leaf 23 of the infill wall concrete mortar is connected to the left and right adjacent wall segments through the self-tapping screw block connection node 25 between the infill wall and the concrete column wall segment, and is connected to the upper and lower precast concrete beams 26 through the self-tapping screw block connection node 29 between the infill wall and the beam.

[0083] The self-tapping screw block connection node 25 between the infill wall and the concrete column wall section is a connection structure between the inner leaf of the infill wall concrete mortar and the composite wall section of the concrete column. A connecting steel plate with self-tapping screw holes is placed into the groove of the inner leaf concrete mortar layer. Self-tapping screws are passed through the self-tapping screw holes of the connecting steel plate, connecting the force-transfer steel plate welded to the inner leaf reinforcing mesh 24 of the infill wall and the force-transfer steel plate welded to the inner leaf reinforcing mesh 8 of the concrete column composite wall section. The groove is then filled with high-performance mortar.

[0084] The self-tapping screw assembly connection node 29 between the infill wall and the beam is an L-shaped force-transfer steel plate with bolt holes welded to the stirrups of the concrete beam reinforcement cage 27, which also serves as a connecting steel plate. It is attached to the flat steel pipe welded to the inner leaf of the infill wall reinforcement mesh 24 via the groove of the inner leaf of the infill wall concrete mortar 23, and the force-transfer flat steel plate welded to the inner leaf of the infill wall reinforcement mesh 24 is connected by self-tapping screws. The L-shaped force-transfer steel plate connected to the upper end of the infill wall is welded to the lower side of the stirrups and pre-embedded in the beam; the L-shaped force-transfer steel plate connected to the lower end of the infill wall is welded to the upper side of the beam stirrups. After the beam and slab concrete is poured, the strip 32 is poured, and the L-shaped force-transfer steel plate is anchored in the beam.

[0085] A 30mm wide mortar strip is applied after the outer leaf steel wire mesh cement mortar layer to connect the outer leaf mortar layers of adjacent concrete column composite wall sections and infill composite wall sections. A 75mm wide mortar strip is reserved at the ends of the outer leaf mortar layer 12 of the concrete column composite wall section and the outer leaf 19 of the infill wall mortar layer of the infill composite wall section. A 150mm wide, 2mm diameter, 50mm spaced reinforcing steel wire mesh is tied within the 150mm mortar strip at the joint of adjacent wall panels. High-performance waterproof mortar is used to smooth the strip. At the joint of the external insulation layer of the wall panels, perlite boards are butted together, and cement-based adhesive is applied to the tongue and groove joints of polystyrene insulation boards before butting to improve the integrity and waterproofing of the joint.

[0086] When designing and fabricating composite walls, the first step is to determine the locations of structural beams and columns based on the building's structural design, and to design the dimensions and reinforcement of precast concrete columns, beams, and floor slabs. The next step involves designing the concrete column composite walls and composite infill walls. The thickness of the insulation layer is determined based on the local climate conditions, the thickness of the external steel mesh mortar surface layer and perlite board based on fire resistance, waterproofing, and weather resistance requirements, and the thickness of the internal mortar surface layer based on the stress requirements of the external insulation system. A light steel frame is then laid out, and a steel wire mesh and light steel combined truss is designed according to stress requirements. The dimensions and thickness of the self-tapping screw block node steel plates, as well as the arrangement and quantity of self-tapping screws, are determined. The relevant design parameters for the composite infill walls are determined, and the connection structure between the precast concrete columns and the composite infill walls is designed and stress-checked. Based on the design scheme, detailed structural drawings are prepared, and the precast components are fabricated, transported, and assembled on-site.

[0087] The specific steps are as follows:

[0088] I. Fabrication process of prefabricated concrete column composite wall segments, precast beams and floor slabs

[0089] Step 1: The factory processes light steel frames, ties concrete column reinforcement cages, concrete beam reinforcement cages, and floor slab reinforcement mesh, purchases polystyrene insulation boards and perlite boards, and cuts and assembles them to the required size; prepares outer leaf steel wire mesh, inner leaf steel wire mesh, and inner leaf reinforcement mesh; prepares wire mesh frame web wires and window frame mortar strip reinforcement mesh with welded force-transmitting steel plates; and prefabricates horizontal countersunk thermal break long self-tapping screw connectors and combined countersunk thermal break long self-tapping screw connectors.

[0090] Step 2: Install and position the light steel frame on the prefabricated concrete column reinforcement cage, and connect the inner leaf steel wire mesh to the light steel frame using U-shaped steel wires; weld horizontal force transmission steel plates to the inner reinforcement mesh, and weld L-shaped force transmission steel plates with self-tapping screw holes to the stirrups of the concrete column reinforcement cage; use self-tapping screws to connect the force transmission steel plates on the inner steel wire mesh by passing them through the self-tapping screw holes of the L-connecting plates; use engineering plastic spacers to space the thickness of the inner mortar layer between the light steel frame and the dovetail groove of the polystyrene insulation board, and position the polystyrene insulation board, perlite board, and outer leaf steel wire mesh.

[0091] Step 3: Pass the horizontal and diagonal web wires of the wire mesh frame through the perlite board and polystyrene insulation board in sequence. Spot weld the two ends of the web wires of the wire mesh frame to the outer leaf wire mesh and the inner leaf reinforcing mesh to form a wire mesh frame. Pass the horizontal thermal break self-tapping screw connector and the long self-tapping screw connector of the combined thermal break self-tapping screw in sequence through the perlite board and polystyrene insulation board, connect the self-tapping screw to the light steel frame, and extend into the concrete column for a certain anchorage distance.

[0092] Step 4: Pour the inner and outer mortar surface layers, leave mortar strips on the top, bottom, left and right sections of the wall, and cure them;

[0093] Step 5: Using the steel wire mesh mortar-perlite-polystyrene insulation structure as the bottom formwork, pour the precast column concrete, and at the same time pour the precast beam and floor slab concrete, and then cure it.

[0094] II. Preparation process of steel wire mesh supporting mortar-perlite-polystyrene thermal insulation composite infill wall

[0095] Step 6: Process the outer leaf steel wire mesh of the infill wall, the perlite board of the infill wall, the polystyrene insulation board of the infill wall, and the inner leaf steel mesh of the concrete mortar; weld one end of the horizontal and diagonal web wires of the steel wire mesh frame to the outer leaf steel wire mesh of the infill wall, and then pass it through the perlite board, polystyrene insulation board and weld it to the inner leaf steel mesh in sequence; weld the force transmission steel plate on the inner leaf steel mesh of the concrete mortar.

[0096] Step 7: The outer leaf of the composite wall mortar and the inner leaf of the composite wall concrete mortar are poured in the factory. The outer leaf of the infill wall mortar is reserved for later application of mortar strips. The inner leaf of the infill wall concrete mortar has a groove reserved on the outside of the force transmission steel plate welded to the steel mesh.

[0097] Step 8: Curing the mortar-perlite-polystyrene insulation composite infill wall supporting the wire mesh frame and transporting it to the construction site;

[0098] III. Assembly and Construction Process

[0099] Step 9: Hoist and position the precast concrete columns and composite wall sections, and lap and tie the longitudinal reinforcing bars in the post-cast areas of the upper and lower concrete columns; hoist and position the precast concrete beams and concrete floor slabs, extend the longitudinal reinforcing bars with anchor plates at the ends of the precast concrete beams into the post-cast strip of the beam-column joint area, and insert the reinforcing bars of the precast concrete slabs into the reinforcing cage formed by the exposed stirrups and longitudinal bars at the top of the precast beams.

[0100] Step 10: Push the composite infill wall from the side between the adjacent precast concrete column composite wall sections. Connect the force-transfer steel plate welded to the inner leaf reinforcement mesh of the concrete column composite wall section with the force-transfer flat steel plate on the inner leaf reinforcement mesh of the composite infill wall. Place the connecting steel plate with self-tapping screw holes in the mortar layer groove. Use self-tapping screws to pass through the self-tapping screw holes of the connecting steel plate to connect the force-transfer steel plate. Attach the L-shaped force-transfer steel plate on the precast beam tightly to the force-transfer flat steel plate on the inner leaf reinforcement mesh of the composite infill wall. Use self-tapping screws to pass through the self-tapping screw holes of the L-shaped connecting plate to connect the force-transfer steel plate. Use high-performance mortar to smooth the groove on the inner concrete mortar surface.

[0101] Step 11: Tie additional steel reinforcement strips in the mortar strip between the precast concrete column composite wall section and the composite infill wall section, and then smooth the mortar strip with high-performance thermal insulation mortar; pour the post-cast concrete strips of the beam-column joint and the beam-slab concrete strips, and cure them.

[0102] Step 12: Apply exterior wall paint to the exterior surface of the wall and apply interior decorative finish to the interior surface.

[0103] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A concrete frame fabricated light steel composite truss supported wire mesh frame mortar-perlite-polyphenyl composite enclosure wall, characterized in that, The application relates to a prefabricated composite wall structure. The prefabricated composite wall structure comprises the following components: a prefabricated concrete column which is formed by pouring concrete into a concrete column reinforcement cage and is connected with a prefabricated concrete beam through a beam-column joint concrete post-poured strip; a prefabricated concrete beam which is formed by pouring concrete into a concrete beam reinforcement cage and is connected with a prefabricated concrete floor slab through a beam-slab concrete post-poured strip; a prefabricated concrete column-light steel frame composite wall segment which is formed by pouring a light steel frame into a prefabricated concrete column, wherein horizontal sunken bridge self-tapping nail connectors and combined sunken bridge self-tapping nail connectors are sequentially arranged through a steel mesh mortar surface layer formed by an outer leaf mortar layer and an outer leaf steel mesh, a perlite plate, a polystyrene insulation board and an inner steel mesh mortar surface layer formed by an inner leaf connecting mortar layer and an inner leaf steel mesh, the self-tapping nail connectors are used for anchoring the light steel frame and extending into the prefabricated concrete column, the inner leaf steel mesh is welded with the light steel frame through a U-shaped steel wire, horizontal web wires of a steel mesh frame, oblique web wires of the steel mesh frame and the outer leaf steel mesh are welded and sequentially arranged through the perlite plate, the polystyrene insulation board and the inner leaf steel mesh and are anchored in the inner leaf concrete mortar layer, and the prefabricated concrete column-light steel frame composite wall segment is connected with the prefabricated concrete column through a column self-tapping nail block connection joint; a composite filling wall segment which is formed by welding horizontal web wires of a steel mesh frame, oblique web wires of the steel mesh frame and an outer leaf steel mesh of a filling wall, sequentially arranging a filling wall mortar outer leaf, a filling wall perlite plate, a filling wall polystyrene insulation board and an inner leaf steel mesh of the filling wall, welding the inner leaf steel mesh of the filling wall and anchoring the inner leaf steel mesh of the filling wall in a filling wall concrete mortar inner leaf, and pulling and connecting all structural layers through the steel mesh frame to form the composite filling wall segment, wherein the composite filling wall segment is connected with adjacent wall segments through a filling wall and a column wall segment self-tapping nail block connection joint and is connected with a prefabricated concrete beam through a filling wall and a beam self-tapping nail block connection joint; outer leaf steel mesh cement mortar layer post-smoothing strips of the prefabricated concrete column-light steel frame composite wall segment and the composite filling wall segment and the outer leaf steel mesh of the filling wall are connected through the outer leaf steel mesh cement mortar layer post-smoothing strips; the outer leaf steel mesh cement mortar layer post-smoothing strips are connecting structures of outer leaf mortar layers of adjacent concrete column composite wall segments and filling composite wall segments, the column self-tapping nail block connection joint is a connecting structure of an inner leaf concrete mortar layer and a side surface of a prefabricated concrete column, L-shaped force transmission steel plates welded on hoop reinforcement of a concrete column reinforcement cage are used as connecting steel plates, holes smaller than diameters of self-tapping nails are formed in flange connecting areas of the L-shaped force transmission steel plates, flat steel plates welded on an inner leaf steel mesh are used as force transmission steel plates, and recesses are reserved outside the flat steel plates welded on the inner leaf steel mesh in the inner leaf concrete mortar layer; when prefabricated components are prepared, the composite wall segment is pushed into the concrete column reinforcement cage with the welded light steel frame from the outside, the L-shaped connecting steel plates on the concrete column reinforcement cage are arranged in the recesses, self-tapping nails are used for penetrating the self-tapping nail holes on the L-shaped steel plates, the flat steel plates on the inner leaf steel mesh are self-tapping connected, and high-performance mortar is used for smoothing the recesses. The prefabricated concrete floor is a fabricated floor component connected with the prefabricated concrete beam, the steel mesh net extends out of the plate end, penetrates the longitudinal reinforcement and part of the stirrup exposed on the upper part of the prefabricated concrete beam, and is anchored in the post-poured concrete strip of the beam slab; the inner leaf connecting mortar layer and the inner leaf steel wire mesh are the mortar layer for bonding between the dovetail groove of the polyphenyl insulation board and the prefabricated concrete column, the net spacing between the inner leaf steel wire mesh and the polyphenyl insulation board with the dovetail groove is 10 mm, the 14 mm thick mortar with the rough surface is used to smooth the inner leaf steel wire mesh and the gap of the dovetail groove of the polyphenyl insulation board, the U-shaped steel wire is the connecting structure of the inner leaf steel wire mesh and the light steel frame, the bending flange is spot welded with the inner leaf steel wire mesh, and the web is welded with the light steel frame; The angle between the square plate of the sunk fiber composite connecting piece of the horizontal sunk blind-bay self-tapping nail connecting piece and the hollow circular rod is 90 degrees, the angle between the rectangular plate of the combined sunk blind-bay self-tapping nail connecting piece and the hollow circular rod is divided into 90 degrees penetrating through the horizontal long self-tapping nail and 45 degrees penetrating through the oblique upward long self-tapping nail; The inner leaf of the infilled wall concrete mortar is internally arranged with the infilled wall inner leaf steel mesh net with a diameter of 4 mm and a spacing of 200 mm, the infilled wall concrete mortar inner leaf is connected with the left and right adjacent wall segments through the infilled wall and concrete column wall segment self-tapping nail cluster connecting nodes, and is connected with the upper and lower prefabricated concrete beams through the infilled wall and beam self-tapping nail cluster connecting nodes.

2. The concrete frame fabricated light steel composite truss supported wire meshed sandwiched mortar-pearlite-polystyrene composite wall of claim 1, wherein, The prefabricated concrete column is a fabricated concrete column component prefabricated in a factory, the cross-sectional shape is rectangular, the cross-sectional width is greater than or equal to 400 mm, the internally arranged concrete column steel reinforcement cage is composed of longitudinal force steel bars and stirrups, the longitudinal force steel bars adopt steel bars with a diameter greater than or equal to 20 mm, the column reinforcement ratio is greater than or equal to 0.25%, the column stirrup adopts steel bars with a diameter of 10 mm arranged at a spacing of 200 mm, the stirrup is densified in the beam-column joint concrete post-poured strip and the upper 500 mm range, and the stirrup spacing is 100 mm; the lower end joint of the prefabricated concrete column is at the floor level, and the upper end joint is at the lower surface level of the beam; The prefabricated concrete beam is a fabricated monolithic prefabricated composite beam component, which is internally arranged with a concrete beam steel reinforcement cage composed of longitudinal steel bars with a diameter of 16 mm and stirrups with a diameter of 10 mm and a spacing of 200 mm, the longitudinal steel bars extend into the beam-column joint concrete post-poured strip and are anchored by anchor plates; the beam end stirrup is densified, and the stirrup spacing in the densified area is 100 mm; the width of the prefabricated concrete beam is 0.7 times the width of the prefabricated concrete column in the same direction, the lower part of the prefabricated concrete beam is only poured with concrete when it is manufactured in the factory, the upper part is reserved with the thickness of the floor and is not poured with concrete, the beam longitudinal reinforcement and stirrup are exposed and used as the post-poured concrete strip of the beam slab during construction.

3. The concrete frame fabricated light steel composite truss supported wire meshed sandwiched mortar-pearlite-polystyrene composite wall of claim 1, wherein, The vertical C-shaped steel and the horizontal C-shaped steel of the light steel frame are welded by C-shaped steel with a vertical and horizontal spacing of no more than 800 mm, and the light steel frame is point-welded by a U-shaped steel wire with a diameter of 2 mm at a position with a net distance of 10 mm from the inner leaf steel wire mesh to connect the steel wire mesh and the light steel frame, and the horizontal and vertical point-welding spacing is no more than 200 mm; the keel C-shaped steel has a cross-section height of 70 mm, a width of 50 mm, and a plate thickness of no less than 2 mm, the light steel frame has a wide groove of 140 mm and a high groove of 60 mm, thereby forming a convex steel section with a net distance of 140 mm, a height of 60 mm, and a width of 60 mm; the light steel frame C-shaped steel is anchored into the prefabricated concrete column at a position with a net distance of 10 mm from the outer side distribution steel wire between the stirrups and the longitudinal stress steel bars of the prefabricated column; the light steel frame with the convex steel section is embedded into the column concrete by 10 mm, and the convex steel section is anchored in the column concrete by 60 mm; in order to facilitate the self-tapping screw connection of the light steel frame keel web, a small circular hole smaller than the diameter of the self-tapping screw is opened on the web of the light steel frame to facilitate the self-tapping screw to pass through.

4. The concrete frame fabricated light steel composite truss supported wire meshed sandwiched mortar-pearlite-polystyrene composite wall of claim 1, wherein, The inner leaf concrete mortar layer is an inner leaf of the wall body perpendicular to the surface of the concrete column for the outer extension part of the composite wall section of the concrete column; the inner leaf concrete mortar layer has a thickness of 50 mm, and an inner leaf steel mesh with a diameter of 4 mm and a spacing of 200 mm is arranged inside; the inner leaf steel mesh is bent and extends into the inner leaf to overlap the connecting mortar layer and the inner leaf steel wire mesh by 100 mm; the inner leaf steel mesh is connected to the prefabricated concrete column through the column self-tapping screw cluster connection node; The outer leaf mortar layer is a 25 mm thick mortar layer with a strength greater than or equal to C20 on the outer side of the wall panel, and an outer leaf steel wire mesh with a diameter of 2 mm and a spacing of 50 mm is arranged inside the outer leaf mortar layer, and the steel wire mesh has a mortar net protection layer of 10 mm; The polyphenyl insulation board is a polyphenyl insulation board with a dovetail groove at the connection with the inner leaf connecting mortar layer; the perlite board is a fireproof layer of the wall panel, and has a thickness of 25 mm.

5. The concrete frame assembled light steel composite truss bearing steel wire mesh frame mortar-perlite-polyphenyl composite enclosing wall according to claim 1, characterized in that, The horizontal web wire of the steel wire mesh frame and the inclined web wire of the steel wire mesh frame are bearing steel wire meshes for connecting the inner leaf steel mesh and the outer leaf steel wire mesh of the composite wall section of the concrete column, and are also bearing steel wire meshes for connecting the outer leaf steel wire mesh and the inner leaf steel mesh of the filling wall of the composite filling wall section; the steel wire mesh frame is composed of the inner leaf steel mesh, the outer leaf steel wire mesh, horizontal web wires of the steel wire mesh frame with a diameter of 2 mm, and inclined web wires of the steel wire mesh frame inclined upward by 45 degrees, and the web wires penetrate the perlite board and the polyphenyl insulation board and then extend into the concrete mortar surface layer; The filling wall mortar outer leaf is a 25 mm thick mortar layer with a strength of no less than C20 on the outer side of the composite filling wall panel, and a filling wall outer leaf steel wire mesh with a diameter of 2 mm and a spacing of 50 mm is arranged inside the filling wall mortar outer leaf, and the steel wire mesh has a mortar net protection layer of 10 mm.

6. The concrete frame fabricated light steel composite truss supported wire meshed sandwiched mortar-pearlite-polystyrene composite wall of claim 1, wherein, The end of the mortar layer of the outer leaf of the concrete column composite wall section and the end of the outer leaf of the filled wall mortar layer of the filled wall section are reserved with 75mm wide mortar finishing strips, the 150mm mortar finishing strips at the joint of the adjacent wallboards are bound with 150mm wide, 2mm diameter, 50mm spacing reinforcing steel wire mesh, and the mortar finishing strips are finished with mortar; the outer thermal insulation layer of the wallboard is connected, the pearl rock board is jointed, and the polyphenyl thermal insulation board is jointed after the cement-based adhesive is applied.

7. The concrete frame fabricated light steel combined truss composite wall according to claim 1, wherein, The horizontal sunk head broken bridge self-tapping nail connecting piece and the combined sunk head broken bridge self-tapping nail connecting piece are the web members of the light steel combined truss; the sunk head fiber composite connecting piece is sunk into the sunk head fiber composite connecting piece with a size of not less than 50mm, the polyphenyl thermal insulation layer is drilled through, and the light steel frame is connected by self-tapping; the sunk head fiber composite connecting piece is a connecting piece formed at one time, which is a 3mm*60mm*60mm outer square plate, a 4mm*46mm*46mm square plate with a setback, a hollow circular rod with an outer diameter of 14mm and an inner diameter of 10mm and a length of 50mm in the middle, and a hollow circular rod with an outer diameter of 14mm and an inner diameter of 6mm and a length of 20mm in the middle; the steel self-tapping nail has a nail cap with a diameter of 10mm, a nail rod with a diameter of 6mm, and a length with a thread; the horizontal sunk head broken bridge self-tapping nail connecting piece is arranged at the top and the bottom of the vertical C-shaped steel of the light steel frame, and the combined sunk head broken bridge self-tapping nail connecting piece is arranged in the middle; The filled wall and the concrete column wall section self-tapping nail block connection node are the connection structures of the filled wall concrete mortar inner leaf and the concrete column composite wall section; the connecting steel plate with self-tapping nail holes is placed in the groove of the inner leaf concrete mortar layer, the self-tapping nail is passed through the self-tapping nail hole of the connecting steel plate, the force transmission steel plate welded on the filled wall inner leaf steel mesh and the force transmission steel plate welded on the inner leaf steel mesh of the concrete column composite wall section are connected by self-tapping, and the groove is filled with high-performance mortar; The filled wall and the beam self-tapping nail block connection node are the L-shaped force transmission steel plates with bolt holes welded on the hoop of the concrete beam steel reinforcement cage and used as connecting steel plates, which are attached to the flat steel pipe welded on the filled wall inner leaf steel mesh through the groove of the filled wall concrete mortar inner leaf, and the force transmission flat steel plate welded on the filled wall inner leaf steel mesh is connected by self-tapping; the L-shaped force transmission steel plate connected to the upper end of the filled wall is welded on the lower side of the hoop and embedded in the beam; the L-shaped force transmission steel plate connected to the lower end of the filled wall is welded on the upper side of the beam hoop, and the L-shaped force transmission steel plate is anchored in the beam after the post-pouring strip of the beam slab concrete.

8. The method for supporting the steel wire mesh frame mortar-pearlite-polyphenyl composite enclosure wall by the light steel composite truss of the concrete frame assembly according to any one of claims 1-7, characterized in that, The method comprises the following steps: I. Preparation process of fabricated concrete column composite wall section, precast beam and floor slab First step: processing light steel frame in factory, binding concrete column reinforcement cage, concrete beam reinforcement cage and floor slab reinforcement mesh, purchasing polyphenyl thermal insulation board and pearl rock board and cutting and assembling them into required size; preparing outer leaf steel mesh, inner leaf steel mesh and inner leaf steel reinforcement mesh, preparing steel mesh web and window frame mortar strip steel mesh welded with force transmission steel plate, and precasting horizontal sunk head broken bridge long self-tapping nail connecting piece and combined sunk head broken bridge long self-tapping nail connecting piece; Second step: install and position the light steel frame on the reinforced cage of the fabricated concrete column, connect the inner leaf steel mesh to the light steel frame through U-shaped steel wire; weld horizontal transmission steel plates on the inner steel mesh, weld L-shaped transmission steel plates with self-tapping holes on the stirrups of the reinforced cage of the concrete column, and connect the transmission steel plates on the inner steel mesh through self-tapping by self-tapping screws passing through the self-tapping holes of the L-shaped connecting plates; use engineering plastic pads to separate the thickness of the inner mortar layer between the light steel frame and the surface of the polyphenyl insulation board dovetail groove, and position the polyphenyl insulation board, perlite board and outer leaf steel mesh; Third step: sequentially pass the horizontal and inclined web wires of the steel mesh through the perlite board and polyphenyl insulation board to form a steel mesh by spot welding the two ends of the web wires to the outer leaf steel mesh and the inner leaf steel mesh; sequentially pass the horizontal broken bridge self-tapping screw connector and the combined broken bridge self-tapping screw connector through the perlite board and polyphenyl insulation board, and self-tap the light steel frame, and extend into the concrete column to a certain anchoring distance; Fourth step: pour the inner and outer mortar surface layers, and reserve the mortar strips on the upper and lower wall sections and the left and right wall sections, and then apply mortar, and maintain; Fifth step: use the steel mesh mortar-perlite-polyphenyl insulation structure as a base mold to pour the concrete of the prefabricated column, and simultaneously pour the concrete of the prefabricated beam and floor, and maintain; II, Preparation process of the supporting steel mesh mortar-perlite-polyphenyl insulation composite infill wall Sixth step: process the outer leaf steel mesh of the infill wall, the perlite board of the infill wall, the polyphenyl insulation board of the infill wall and the inner leaf steel mesh of the concrete mortar; weld one end of the horizontal and inclined web wires of the steel mesh to the outer leaf steel mesh of the infill wall, and sequentially pass through the perlite board, the polyphenyl insulation board and the inner leaf steel mesh to weld; weld transmission steel plates on the inner leaf steel mesh of the concrete mortar; Seventh step: pour the outer leaf of the composite wall mortar and the inner leaf of the composite wall concrete mortar in the factory, reserve the mortar strips on the outer leaf of the infill wall, and reserve the grooves on the outer side of the inner leaf of the infill wall concrete mortar by welding transmission steel plates on the steel mesh; Eighth step: maintain the supporting steel mesh mortar-perlite-polyphenyl insulation composite infill wall, and transport it to the construction site; III, Assembly construction process Ninth step: hoist and position the prefabricated concrete column and the composite wall section, and overlap and bind the longitudinal stress steel bars in the post-poured area of the upper and lower concrete columns; hoist and position the prefabricated concrete beam and the concrete floor, extend the longitudinal steel bars with anchoring plates at the end of the prefabricated concrete beam into the post-poured zone of the beam-column joint, and pass the steel bars of the prefabricated concrete slab into the steel cage formed by the stirrups and longitudinal steel bars exposed on the upper part of the prefabricated beam; Tenth step: push the composite infill wall from the side into the composite wall section between the adjacent prefabricated concrete columns, butt the transmission steel plates welded on the inner leaf steel mesh of the composite wall section of the concrete column with the transmission flat steel plates on the inner leaf steel mesh of the composite infill wall, put the connecting steel plates with self-tapping screw holes into the mortar layer grooves, self-tap the transmission steel plates through the self-tapping screw holes of the connecting steel plates by using self-tapping screws, and connect the transmission steel plates by self-tapping; tightly attach the L-shaped transmission steel plates on the prefabricated beam to the transmission flat steel plates on the inner leaf steel mesh of the composite infill wall, and self-tap the transmission steel plates by using self-tapping screws through the self-tapping screw holes of the L-shaped connecting plates; use high-performance mortar to smooth the grooves of the inner concrete mortar surface layer; Tenth step: tie the additional steel bar in the mortar strip between the precast concrete column composite wall section and the composite infilled wall section, then use high-performance thermal insulation mortar to smooth the mortar strip; pour the beam-column joint concrete post-poured strip and the beam-slab concrete post-poured strip, and maintain; Twelfth step: apply exterior wall paint to the outer surface of the wall, and make the inner decorative surface layer.

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