CN116044053B - Concrete frame prefabricated light steel composite truss supporting steel wire mesh mortar-perlite-polystyrene composite enclosure wall and its construction method - Google Patents
Concrete frame prefabricated light steel composite truss supporting steel wire mesh mortar-perlite-polystyrene composite enclosure wall and its construction methodInfo
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- CN116044053B CN116044053B CN202211691924.1A CN202211691924A CN116044053B CN 116044053 B CN116044053 B CN 116044053B CN 202211691924 A CN202211691924 A CN 202211691924A CN 116044053 B CN116044053 B CN 116044053B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
- E04B2/562—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with fillings between the load-bearing elongated members
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/665—Sheets or foils impervious to water and water vapor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6801—Fillings therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/78—Heat insulating elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/78—Heat insulating elements
- E04B1/80—Heat insulating elements slab-shaped
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/94—Protection against other undesired influences or dangers against fire
- E04B1/941—Building elements specially adapted therefor
- E04B1/942—Building elements specially adapted therefor slab-shaped
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
- E04B2/64—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of concrete
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/7407—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using frames with infill panels or coverings only; made-up of panels and a support structure incorporating posts
- E04B2/7409—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using frames with infill panels or coverings only; made-up of panels and a support structure incorporating posts special measures for sound or thermal insulation, including fire protection
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/82—Removable non-load-bearing partitions; Partitions with a free upper edge characterised by the manner in which edges are connected to the building; Means therefor; Special details of easily-removable partitions as far as related to the connection with other parts of the building
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional [3D] extent, e.g. lattice girders
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2002/7461—Details of connection of sheet panels to frame or posts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/90—Passive houses; Double facade technology
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Abstract
The invention discloses a concrete frame assembly type light steel combined truss bearing steel wire net rack mortar-perlite-polyphenyl composite enclosure wall and a manufacturing method thereof, and relates to the technical field of assembly type concrete building structural engineering. The self-tapping screw assembly type concrete column comprises a steel wire mesh mortar-perlite surface layer, a bearing steel wire net frame, a light steel combined truss, self-tapping screw assembly connection nodes and an assembled concrete column, wherein the bearing steel wire net frame is formed by welding an outer steel wire net at the outer ends of a horizontal web wire and an inclined web wire, penetrating through a perlite layer and a polyphenyl layer, then welding an inner steel bar net in a spot welding manner and anchoring in the inner concrete mortar layer, the light steel combined truss is formed by a steel wire mesh mortar layer, a bridge-cut-off self-tapping screw web member and a light steel frame chord member, and the concrete column composite wall section self-tapping screw assembly connection structure is a structure formed by connecting steel plates welded on concrete column stirrups and force transmission steel plates welded on the steel bar net welded on the concrete mortar layer in a wall section through self-tapping screws. The invention has good anti-seismic, fire-resistant, heat-insulating, waterproof and weather-resistant properties.
Description
Technical Field
The invention belongs to the technical field of assembled concrete building structure engineering, and particularly relates to a concrete frame assembled light steel combined truss supported steel wire net rack mortar-perlite-polyphenyl composite enclosure wall and a manufacturing method thereof.
Background
The development of the ultra-low energy consumption green assembled building is an important way for promoting the development of building industrialization and residence industrialization. The multi-story and high-rise assembled concrete frame structure is widely applied to the fields of houses and public buildings, but the innovation and development of the heat-preservation and energy-saving prefabricated part components matched with the multi-story and high-rise assembled concrete frame structure are lagged, and the problems of low thermal performance, low integration degree and the like of the building envelope of the ultra-low energy consumption building still exist. The technical bottleneck problems are that 1 the weight of the filled lightweight wallboard in the traditional assembled concrete structure is relatively large, the heat preservation is relatively poor, and the frame and the filled lightweight wallboard are incongruous in deformation and easy to crack. 2 the traditional external wall external heat insulation structure is easy to drop and has poor weather resistance under the action of wind load and long-term load. In recent years, safety accidents caused by large-area falling of an outer heat-insulating layer of an outer wall frequently occur, surrounding pedestrians or objects are extremely easy to damage, 3 the deformation of the super-thick heat-insulating layer under long-term load is difficult to control, meanwhile, the application height of a thin-plastered outer wall heat-insulating system is strictly limited in a domestic part of regions, ceramic face bricks are required to be forbidden to be used for the facing layer of the thin-plastered outer wall heat-insulating system to avoid falling risks, 4 the traditional outer heat-insulating wall is poor in fire resistance, most of outer heat-insulating structures are free of fire-resistant layers, 5 the traditional connecting technology cannot solve the problem that the sandwich perlite-polyphenyl heat-insulating composite wall sections of the inner and outer leaf mortar surface layers of a steel wire grid are connected with a concrete frame, the traditional grouting sleeve connecting technology cannot connect a thin and dense steel bar grid in a concrete sheet with a concrete frame beam column, and the embedded part-bolt connecting technology can cause a cold bridge, and the heat-insulating performance of the composite wall is reduced. 6, the traditional external heat-insulating plate is difficult to process the seam and the opening, the problem of water leakage at the seam position is serious, and the heat-insulating structure is easy to loosen and fall off. Therefore, the development of the multifunctional integrated assembled concrete frame outer wall system further develops the composite outer wall integrating decoration, fire prevention, water prevention, heat insulation and weather resistance, and is a great demand for the development of assembled green buildings.
Disclosure of Invention
In order to solve the technical problems, the invention provides a concrete frame assembly type light steel combined truss bearing steel wire net rack mortar-perlite-polyphenyl composite enclosure wall, which is suitable for an ultra-low energy consumption house window hole outer wall of a concrete frame structure. The heat-insulating wall section which is compositely prefabricated with the assembled concrete column adopts a light steel frame steel wire grid mortar surface layer-perlite-polyphenyl heat-insulating external wall board, and the filling wall section between the assembled concrete columns adopts a steel wire grid inner and outer leaf mortar surface layer sandwich perlite-polyphenyl heat-insulating composite wall section. The steel wire net frame mortar surface layer-perlite has the advantages of thin thickness, light weight and good fire resistance and heat insulation performance. The truss formed by the steel wire mesh mortar layer, the bridge-cut-off self-tapping screw web members and the lattice light steel string rods can support the weight of the outer mortar of the shear wall, the fireproof heat-insulating layer and effectively limit the downward shearing deformation of the mortar layer under long-term load. The steel wire net frame inner and outer leaf mortar surface layer sandwich perlite-polyphenyl thermal insulation composite filling wall section which is semi-embedded in the concrete frame is light in weight and can work together with the concrete frame structure to cooperatively deform.
The technical scheme adopted is that the concrete frame assembly type light steel combined truss bearing steel wire net rack mortar-perlite-polyphenyl composite enclosure wall comprises:
The prefabricated concrete column is manufactured by pouring concrete through a concrete column reinforcement cage and is connected with a prefabricated concrete beam through a beam column node concrete post-pouring belt;
the prefabricated concrete beam is manufactured by pouring concrete from a concrete beam reinforcement cage and is connected with a prefabricated concrete floor slab through a beam slab concrete post-pouring strip;
The assembled concrete column light steel sash composite wall section comprises a light steel sash, a horizontal countersunk bridge-cut-off self-tapping screw connecting piece, a combined countersunk bridge-cut-off self-tapping screw connecting piece, an inner steel wire mesh mortar surface layer, a perlite plate, a polyphenyl insulation board and an inner leaf connecting mortar layer and an inner leaf steel wire mesh, wherein the light steel sash is formed by welding light steel sash vertical C-shaped steel and light steel sash horizontal C-shaped steel, is poured in a precast concrete column, and sequentially penetrates through the steel wire mesh mortar surface layer, the perlite plate, the polyphenyl insulation board and the inner leaf steel mesh, and the inner steel wire mesh mortar surface layer formed by connecting the inner leaf mortar layer and the inner leaf steel wire mesh;
The composite filling wall section is formed by welding a steel wire net frame horizontal web wire, a steel wire net frame oblique web wire and a filling wall outer leaf steel wire net to sequentially pass through a filling wall mortar outer leaf, a filling wall perlite plate and a filling wall polyphenyl insulation board, welding with a filling wall inner leaf steel wire net and anchoring on a filling wall concrete mortar inner leaf, and forming a composite filling wall section by steel wire net frame tie-up of each structural layer;
the light steel sash composite wall section of the assembled concrete column is connected with the outer leaf steel wire mesh of the composite filling wall section and the outer leaf steel wire mesh of the filling wall through the outer leaf steel wire mesh cement mortar layer and then the strip is smeared.
Preferably, the prefabricated concrete column is an assembled concrete column component prefabricated in a factory, the section shape is square or rectangular, the section width is more than or equal to 400mm, the internally configured concrete column reinforcement cage is composed of longitudinal stress reinforcement and stirrups, the longitudinal stress reinforcement adopts reinforcement with the diameter of more than or equal to 20mm, the column section reinforcement ratio is more than or equal to 0.25%, the column stirrups are arranged at the distance of 200mm between reinforcement with the diameter of 10mm, and the stirrups are encrypted in the range of 500mm at the post-pouring zone and the upper part of the beam-column node, the stirrups are 100mm in distance, the lower end joint of the prefabricated concrete column is at the floor elevation, and the upper end joint is at the elevation of the lower surface of the beam;
The precast concrete beam is an assembled integral precast superposed beam component, a concrete beam reinforcement cage is arranged in the precast concrete beam component, the concrete beam reinforcement cage is composed of longitudinal steel bars with the diameter of 16mm and hoops with the distance of 200mm, the longitudinal steel bars extend into a beam column node concrete post-pouring belt and are anchored by adopting an anchor plate, hoops at the beam end are encrypted, the hoops in an encryption area are 100mm, the width of the precast concrete beam is 0.7 times that of a precast concrete column in the same direction, only lower concrete is poured when the precast concrete beam is manufactured in a factory, the thickness of a floor slab is reserved at the upper part, the longitudinal steel bars of the beam and the hoops are exposed, and the longitudinal steel bars and the hoops are used as beam slab concrete post-pouring strips during construction;
The prefabricated concrete floor slab is an assembled floor slab component connected with the prefabricated concrete beam, and a reinforcing mesh of the prefabricated concrete floor slab extends out of a slab end and then penetrates through longitudinal ribs and partial stirrups exposed on the upper part of the prefabricated concrete beam to be anchored in a beam slab concrete post-pouring strip.
Preferably, the light steel sash vertical C-shaped steel and the light steel sash horizontal C-shaped steel are formed by welding C-shaped steel with vertical and horizontal distances not larger than 800mm, the light steel sash is welded at a position with a clear distance of 10mm from an inner leaf steel wire net by adopting U-shaped steel wires with diameters of 2mm to be respectively welded to connect the steel wire net and the light steel sash, the distance between the horizontal and vertical spot welds is not larger than 200mm, the keel C-shaped steel section is 70mm in height, 50mm in width and plate thickness not smaller than 2mm, the light steel sash is provided with flange grooves with widths of 140mm and heights of 60mm, so that protruding steel sections with clear distances of 140mm, 60mm and 60mm are formed, the light steel sash C-shaped steel is anchored into a precast concrete column from the positions with clear distances of 10mm of steel bars distributed outside the hoops of precast columns and the spaces of longitudinal stress steel bars, the light steel sash 10mm with protruding steel sections are embedded into the column concrete with the high section, the protruding steel sections are anchored in the column concrete for 60mm, the light steel sash web is connected with the light steel sash by self-nails, and the light steel sash web is convenient to penetrate through the holes with self-nails, and the self-tapping nails are convenient to penetrate through the webs.
Preferably, the inner leaf is connected with the mortar layer and the inner leaf steel wire mesh, is a mortar layer with the bonding effect between the dovetail groove of the polyphenyl insulation board and the precast concrete column, the net distance between the inner leaf steel wire mesh and the polyphenyl insulation board with the dovetail groove is 10mm, and the gap between the inner leaf steel wire mesh and the dovetail groove of the polyphenyl insulation board is smoothed by adopting the mortar with the pitting surface with the thickness of 14mm and the strength of more than or equal to C20;
The inner leaf concrete mortar layer is a wall inner leaf of which the overhanging part of the composite wall section of the concrete column is vertical to the surface of the concrete column, the thickness of the inner leaf concrete mortar layer is 50mm, inner leaf reinforcing steel bar nets with the diameter of 4mm and the interval of 200mm are arranged inside the inner leaf concrete mortar layer, and the inner leaf reinforcing steel bar nets are bent and extend into the inner leaf connecting mortar layer to be overlapped with the inner leaf steel bar nets by 100mm;
The outer leaf mortar layer is a 25mmm thick mortar layer with the outer side strength of the wallboard being greater than or equal to C20, an outer leaf steel wire mesh with the diameter of 2mm and the interval of 50mm is arranged in the outer leaf mortar layer, and the mortar net protection layer of the steel wire mesh is 10mm;
The polystyrene thermal insulation board is provided with dovetail grooves at the joint of the polystyrene thermal insulation board and the inner leaf connecting mortar layer, and the perlite board is a wall board fireproof layer with the thickness of 25mm.
Preferably, the inner leaf of the filling wall concrete mortar is internally provided with a filling wall inner leaf reinforcing steel bar net with the diameter of 4mm and the interval of 200mm, the inner leaf of the filling wall concrete mortar is connected with left and right adjacent wall sections through filling wall and concrete column wall section self-tapping screw assembly connection nodes, and is connected with upper and lower precast concrete beams through filling wall and beam self-tapping screw assembly connection nodes;
The steel wire net frame consists of a steel wire net frame horizontal web wire with the spot welding diameter of 2mm and a steel wire net frame inclined web wire with the inclined upward 45 degrees, wherein the web wire penetrates through a perlite plate and a polyphenyl insulation plate and then stretches into a concrete mortar surface layer;
The outer leaf of the filling wall mortar is a 25mmm thick mortar layer with the outer side strength of the composite filling wall board not lower than C20, a filling wall outer leaf steel wire net with the inner diameter of 2mm and the interval of 50mm is arranged in the outer leaf of the filling wall mortar, and the mortar net protection layer of the steel wire net is 10mm.
Preferably, the back plastering strip is a connection structure of the adjacent concrete column composite wall section and the outer leaf mortar layer of the filling composite wall section, 75mm wide mortar is reserved at the end part of the outer She Shajiang layer of the concrete column composite wall section and the end part of the outer leaf of the filling composite wall section filling wall mortar layer, the back plastering strip is used for binding 150mm wide reinforced steel wire meshes with the diameter of 2mm and the interval of 50mm in the 150mm mortar back plastering strip at the butt joint position of the adjacent wallboards, the mortar trowelling strip is adopted, the connection position of the external heat insulation layers of wallboards is butted with perlite boards, and the butt joint is carried out after cement-based adhesive cement is smeared at the rabbet position of the polyphenyl heat insulation boards.
Preferably, the column self-tapping screw block connecting joint is a connecting structure of an inner leaf concrete mortar layer and the side surface of a prefabricated concrete column, an L-shaped force transmission steel plate is welded on a stirrup of the concrete column reinforcement cage and also used as a connecting steel plate, a flange connecting area of the L-shaped force transmission steel plate is provided with a hole smaller than the diameter of a self-tapping screw, a flat steel plate is welded on the inner leaf reinforcement net as the force transmission steel plate, a groove is reserved on the outer side of the flat steel plate welded on the inner leaf concrete mortar layer, a composite wall section is pushed into a concrete column reinforcement cage welded by a light steel frame from the outer side when a prefabricated member is manufactured, the L-shaped connecting steel plate on the concrete column reinforcement cage enters the groove, a self-tapping screw penetrates through a self-tapping screw hole on the L-shaped steel plate, and is connected with the flat steel plate on the inner leaf reinforcement net by self-tapping screw, and the groove is smoothed by high-performance mortar;
the angle between the square plate of the countersunk fiber composite connecting piece of the horizontal countersunk bridge-cut-off self-tapping screw connecting piece and the hollow round bar is 90 degrees, the angle between the square plate of the countersunk fiber composite connecting piece of the horizontal countersunk bridge-cut-off self-tapping screw connecting piece and the hollow round bar is 90 degrees penetrating through the horizontal long self-tapping screw and 45 degrees penetrating through the inclined upward long self-tapping screw, the diameter of the screw cap of the steel self-tapping screw is 10mm, the diameter of the tapping screw is 6mm, the diameter of the hollow round bar is 10mm, the diameter of the hollow round bar is 20mm, the diameter of the hollow round bar is 6mm, and the angle between the square plate of the countersunk fiber composite connecting piece of the horizontal countersunk bridge-cut-off self-tapping screw connecting piece and the hollow round bar is 90 degrees, and the angle between the square plate of the countersunk fiber composite connecting piece of the combined countersunk bridge-cut-off self-tapping screw is 90 degrees penetrating through the horizontal long self-tapping screw and 45 degrees penetrating through the inclined upward long self-tapping screw;
the self-tapping screw connecting joint is a connecting structure of the inner leaf of the filled wall concrete mortar and the concrete column composite wall section, a connecting steel plate provided with a self-tapping screw hole is put into a groove of the inner leaf concrete mortar layer, the self-tapping screw penetrates through the connecting steel plate self-tapping screw hole, the self-tapping is connected with a force transmission steel plate welded on the inner leaf steel bar net of the filled wall and a force transmission steel plate welded on the inner leaf steel bar net of the concrete column composite wall section, and the groove is filled with high-performance mortar;
the filling wall and beam self-tapping screw block connection node is an L-shaped force transmission steel plate welded on a concrete beam reinforcement cage stirrup and provided with a bolt hole, the L-shaped force transmission steel plate is also used as a connection steel plate, a groove of a filling wall concrete mortar inner leaf is attached to a flat steel pipe welded on a filling wall inner leaf reinforcement net, the self-tapping screw is adopted to self-tap the force transmission flat steel plate welded on the filling wall inner leaf reinforcement net, the L-shaped force transmission steel plate connected with the upper end of the filling wall is welded on the lower side of the stirrup and embedded in a beam, the L-shaped force transmission steel plate connected with the lower end of the filling wall is welded on the upper side of the beam stirrup, and the L-shaped force transmission steel plate is anchored in the beam after a beam plate concrete post-pouring strip is poured.
The method for supporting the steel wire mesh frame mortar-perlite-polyphenyl composite enclosure wall by the concrete frame assembly type light steel combined truss comprises the following steps of:
I. fabricated concrete column composite wall section, precast beam and floor slab preparation process
The method comprises the steps of processing a light steel sash in a factory, binding a concrete column reinforcement cage, a concrete beam reinforcement cage and a floor slab reinforcement net, purchasing a polyphenyl insulation board and a perlite board, and cutting and assembling the polyphenyl insulation board and the perlite board into required sizes;
The second step, the light steel frame is installed and positioned on the assembled concrete column steel reinforcement cage, the inner leaf steel wire mesh is connected on the light steel frame through U-shaped steel wires, a horizontal force transmission steel plate is welded on the inner steel reinforcement mesh, an L-shaped force transmission steel plate with a self-tapping screw hole is welded on the concrete column steel reinforcement cage stirrup, the self-tapping screw is adopted to pass through the self-tapping screw hole of the L-shaped connecting plate to self-tap and connect the force transmission steel plate on the inner steel wire mesh, and the thickness of an inner mortar layer is spaced between the light steel frame and the dovetail groove surface of the polyphenyl insulation plate through cushion blocks such as engineering plastics, and the polyphenyl insulation plate, the perlite plate and the outer leaf steel wire mesh are positioned;
The third step, the horizontal web wires of the steel wire net frame and the oblique web wires of the steel wire net frame sequentially penetrate through the perlite plate and the polyphenyl thermal insulation plate, and the two ends of the web wires of the steel wire net frame, the outer leaf steel wire net and the inner leaf steel wire net are spot welded to form the steel wire net frame;
pouring an inner mortar surface layer and an outer mortar surface layer, reserving mortar strips on the upper section, the lower section, the left section and the right section of the wall section, and curing;
Fifthly, taking a steel wire grid mortar-perlite-polyphenyl thermal insulation structure as a bottom die, pouring precast column concrete, pouring concrete of precast beams and floor slabs, and curing;
II. Preparation process of bearing steel wire rack mortar-perlite-polyphenyl thermal insulation composite filling wall
Step six, processing an outer leaf steel wire mesh of the filling wall, a perlite plate of the filling wall, a polyphenyl thermal insulation plate of the filling wall and an inner leaf steel bar mesh of the concrete mortar, welding one ends of horizontal and oblique web wires of the steel wire mesh frame with the outer leaf steel wire mesh of the filling wall, and sequentially passing through the perlite plate, the polyphenyl thermal insulation plate and the inner leaf steel bar mesh for welding;
pouring outer leaves of composite wall mortar and inner leaves of composite wall concrete mortar in factories, reserving the outer leaves of the filled wall mortar, then plastering mortar strips, and welding grooves reserved on the outer sides of the force transmission steel plates on the reinforcing steel bar meshes by the inner leaves of the filled wall concrete mortar;
The eighth step, maintenance and bearing of the steel wire rack mortar-perlite-polyphenyl thermal insulation composite filling wall, and transportation to a construction site;
III, assembling construction flow
Hoisting and positioning the precast concrete column and the composite wall section, and overlapping and binding longitudinal stress steel bars in a post-cast area of the upper layer concrete column and the lower layer concrete column; hoisting and positioning the precast concrete beam and the concrete floor slab, extending longitudinal steel bars with anchor plates at the precast concrete beam ends into post-cast strips at beam column node areas, and penetrating the steel bars of the precast concrete slab into a steel bar cage formed by stirrups and longitudinal bars exposed at the upper parts of the precast beams;
The tenth step is that the composite filling wall is pushed between the adjacent prefabricated concrete column composite wall sections from the side, the force transmission steel plates welded on the inner leaf steel bar nets of the concrete column composite wall sections are butted with the force transmission flat steel plates on the inner leaf steel bar nets of the composite filling wall, the connecting steel plates with self-tapping screw holes are put in the mortar layer grooves, the self-tapping screw holes penetrating the connecting steel plates are adopted to self-tap the connecting force transmission steel plates, the L-shaped force transmission steel plates on the prefabricated beams are tightly adhered to the force transmission flat steel plates on the inner leaf steel bar nets of the composite filling wall, the self-tapping screw holes penetrating the L-shaped connecting plates are adopted to self-tap the connecting force transmission steel plates, and the high-performance mortar is adopted to level the inner concrete mortar layer grooves;
Binding additional reinforcing steel bars in the mortar strips between the prefabricated concrete column composite wall section and the composite filling wall section, and trowelling the mortar strips by adopting high-performance heat-insulating mortar;
and twelfth, coating the outer surface of the wall with outer wall paint, and making the inner surface of the wall into an inner decorative surface layer.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in:
the 1 steel wire mesh mortar-perlite surface layer overcomes the defect of poor fire resistance of the traditional external heat-insulating wall, and the perlite plate has the advantages of good fireproof and heat-insulating properties, and the high-performance mortar layer has good structure, waterproof and weather resistance;
2, the light steel combined truss, the bearing steel wire net frame structure and the self-tapping screw connecting structure of the composite wall and the column can effectively resist downward shearing deformation of the mortar layer under long-term load, and can control the shearing deformation to be transmitted downwards at each floor, so that the technical bottleneck problem that the deformation of the ultra-thick heat-insulating layer is difficult to control under long-term load is solved;
The 3 steel wire net rack inner and outer leaf mortar surface layer sandwich perlite-polyphenyl thermal insulation composite filling wall segments overcome the technical problems that the weight of the wall segments between columns is relatively large, the thermal insulation is relatively poor, and the frame and the filling light wall plates are uncooled in deformation and easy to crack;
The self-tapping screw block connecting node of the composite filling wall solves the problem of connection between a fine and dense reinforcing steel bar net in She Shajiang layers in the composite filling wall and a composite wall section of a concrete beam and a concrete column, has good stress performance, can effectively resist the shearing deformation of a mortar layer under long-term load, and controls the gravity load of an external heat-insulation structure of the filling wall to be in the layer and not transmitted downwards;
And 5, the steel wire mesh mortar back-wiping strip in the combined connection structure enhances the integrity of the mortar surface layer of the wallboard, solves the problem of joint connection of the traditional heat-insulating board, improves the waterproof performance of the wallboard, ensures that the heat-insulating structure of the wallboard has good weather resistance, and can be used as a template of a post-pouring strip, thereby facilitating assembly construction.
Drawings
FIG. 1 is a schematic structural view of an assembled concrete frame light steel sash wire mesh grid mortar finish-perlite-polyphenyl thermal insulation composite exterior wall;
FIG. 2 is a schematic cross-sectional view of the structures 1-1, 2-2, 3-3 in FIG. 1;
FIG. 3 is a schematic cross-sectional view of the structures 4-4, 5-5, 6-6 in FIG. 1;
FIG. 4 is a schematic structural view of a concrete light steel sash wire grid mortar finish-perlite-polyphenyl thermal insulation composite wall section;
FIG. 5 is a schematic view of a further construction of a concrete light steel sash wire grid mortar finish-perlite-polyphenyl insulation composite wall section;
FIG. 6 is a schematic structural view of a composite infill wall section;
FIG. 7 is a schematic view of yet another construction of a composite infill wall segment;
FIG. 8 is a schematic view of a composite infill wall and precast reinforced concrete composite beam self-tapping screw block connection structure;
FIG. 9 is a schematic view of the assembled connection structure of the precast concrete column composite wall segments and the composite infill wall;
FIG. 10 is a schematic view of a fabricated concrete frame node connection structure;
FIG. 11 is a schematic view of prefabricated concrete columns and composite wall panel assembly connection structures;
FIG. 12 is a schematic view of the composite wall, precast concrete beam, and precast floor plank assembly connection structure;
1, prefabricating a concrete column; 2, a concrete column reinforcement cage; 3, vertical C-shaped steel of the light steel frame lattice; the concrete slab comprises a light steel frame, a transverse C-shaped steel frame, a 5-leaf connecting mortar layer, a 6-leaf steel wire mesh, a 7-leaf concrete mortar layer, a 8-leaf steel bar mesh, a 9-U-shaped steel wire, a 10-leaf steel insulation board, a 11-perlite board, a 12-leaf mortar layer, a 13-leaf steel wire mesh, a 14-column self-tapping screw connecting joint, a 15-horizontal countersink bridge self-tapping screw connecting piece, a 16-combined countersink bridge self-tapping screw connecting piece, a 17-steel wire mesh horizontal web wire, a 18-steel wire mesh oblique web wire, a 19-filled wall mortar layer outer leaf, a 20-filled wall outer leaf steel wire mesh, a 21-filled wall perlite board, a 22-filled wall polyphenyl insulation board, a 23-filled wall concrete mortar inner leaf, a 24-filled wall inner leaf steel bar mesh, a 25-filled wall and concrete section self-tapping screw block connecting joint, a 26-precast beam, a 27, a beam concrete cage, a 28, a precast concrete floor slab, a 29-filled wall and beam self-beam connecting joint, a 30-filled wall and a cement bridge self-tapping beam bridge self-tapping screw connecting joint, a 31, a strip post-poured steel bar concrete strip, a post-poured strip steel bar bridge, and a 32.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The assembled reinforced concrete column light steel frame steel wire net frame mortar surface layer-perlite-polyphenyl thermal insulation composite outer wall mainly comprises a steel wire net mortar-perlite surface layer, a bearing steel wire net frame, a light steel combined truss, self-tapping screw block connecting nodes and an assembled concrete column. The steel wire mesh mortar-perlite surface layers are a steel wire mesh mortar layer and a perlite fireproof layer which are 25mm thick, and have good anti-seismic, fire-resistant, heat-insulating, waterproof and weather-resistant properties. The light steel combined truss is a truss formed by a steel wire mesh mortar layer, a bridge-cutoff self-tapping screw web member and a light steel sash chord member. The light steel combined truss consists of an outer chord of a 25mm thick steel wire mesh mortar layer strip, a vertical C-shaped steel inner chord of a light steel frame, a horizontal web member of a countersunk broken bridge length self-tapping screw with the diameter not smaller than 5mm and a web member with an inclined upward angle of 45 degrees, and can effectively control the dead weight of the mortar surface layer of an outer wall section connected with a concrete column to be controlled at each floor without downward transmission. The outer ends of the horizontal web wires with the diameter of 2mm and the web wires with the inclined upward angle of 45 degrees are welded with the outer steel wire mesh in a spot welding way, sequentially penetrate through the perlite layer and the polyphenyl layer, then are welded with the inner steel wire mesh in a spot welding way, and are anchored in the inner concrete mortar layer. The self-tapping screw block connection structure of the assembled concrete column composite wall section is a structure of self-tapping screw self-tapping connection of an L-shaped connecting steel plate which is welded on a concrete column stirrup and is provided with a self-tapping screw hole and also serves as a force transmission steel plate and a force transmission steel plate welded on a reinforcing steel bar net of a concrete mortar layer in the wall section.
The steel wire mesh frame inner and outer leaf mortar surface layer sandwich perlite-polyphenyl thermal insulation composite wall sections between the assembled concrete columns sequentially comprise steel wire mesh mortar outer leaves, perlite plates, polyphenyl thermal insulation layers and reinforced mesh concrete mortar inner leaves from outdoor to indoor. The polystyrene sandwich composite wallboard is a semi-embedded type polystyrene sandwich composite wallboard, an outer leaf steel wire mesh mortar layer of the polystyrene sandwich composite wallboard is flush with outer leaf steel wire mesh mortar of a concrete column wall section, a polystyrene board and a reinforced mesh concrete mortar layer of the inner side part of a composite filling wall section are embedded into the inner side of a frame, and an inner leaf reinforced mesh concrete mortar layer of the wallboard is connected with an upper concrete beam, a lower concrete beam, a left wall section and a right wall section through self-tapping screw assembly structures. The reinforced net concrete mortar inner leaves of the composite filling wall are connected with the upper connecting beam, the lower connecting beam and the left and right composite shear walls through self-tapping screw assembly connection structures. The outer leaf of the reinforced net mortar is connected with the upper and lower adjacent wallboards and the left and right concrete column composite wall sections by adopting the additional steel wire net and then the mortar smearing strips, and the steel wire nets in the area of the mortar smearing strips are lapped.
The assembled combined connection structure comprises an assembly structure of post-pouring strips of joints of upper and lower concrete columns and beam ends, a connection structure of post-pouring strips of upper and lower concrete column composite wall sections in the region, a connection structure of heat insulation plates of the concrete column composite wall sections, a self-tapping nail collection block of inner leaf reinforced concrete mortar surface layers of the concrete column composite wall sections, and a connection structure of self-tapping nail collection blocks of upper and lower concrete beams.
As shown in fig. 1-12, the specific structure and connection relationship of the above parts are as follows:
The prefabricated concrete column 1 is manufactured by pouring concrete from a concrete column reinforcement cage 2 and is connected with the prefabricated concrete beam 26 through a beam column node concrete post-pouring belt 31. The prefabricated concrete column 1 is an assembled concrete column component prefabricated in a factory, the section shape of the prefabricated concrete column component can be square or rectangular, the section width of the prefabricated concrete column component is not smaller than 400mm, a concrete column reinforcement cage 2 is arranged inside the prefabricated concrete column, the concrete column reinforcement cage 2 is composed of longitudinal stress reinforcement and stirrups, the longitudinal stress reinforcement adopts phi 20 and above diameter reinforcement, the column section reinforcement rate is not smaller than 0.25%, column stirrups are distributed at a distance of 200 in 10-diameter, stirrups are encrypted in a range of 500mm at the upper part of a beam column node concrete post-pouring belt 31, and the stirrup distance is 100mm. The lower end joint of the precast concrete column 1 is positioned at the elevation of the floor, and the upper end joint is positioned at the elevation of the lower surface of the beam.
The prefabricated concrete beam 26 is manufactured by pouring concrete from a concrete beam reinforcement cage 27, and is connected with the prefabricated concrete floor 28 through a beam slab concrete post-pouring strip 32. The precast concrete beam 26 is an assembled integral precast composite beam member, a concrete beam reinforcement cage 27 is arranged in the precast concrete beam 26, the concrete beam reinforcement cage 27 is composed of longitudinal reinforcements with the diameter of 16 and stirrups with the distance of 200mm with the diameter of 10mm, and the longitudinal reinforcements extend into a beam column node concrete post-pouring belt 31 and are anchored by adopting an anchor plate. The stirrups at the end part of the beam are encrypted, and the stirrup spacing in the encryption area is 100mm. The width of the precast concrete beam 26 is 0.7 times of the width of the precast concrete column 1 in the same direction, the precast concrete beam 26 is only poured with lower concrete when manufactured in a factory, the thickness of the upper reserved floor slab is not poured with concrete, and beam longitudinal ribs and stirrups are exposed and used as beam slab concrete post-pouring strips 32 during construction.
The precast concrete floor slabs 28 are assembled floor slab members connected with the precast concrete beams 26, and the reinforcing mesh extends out of the slab ends and then passes through the exposed longitudinal ribs and part of the stirrups on the upper parts of the precast concrete beams 26 to be anchored in the beam slab concrete post-cast strips 32.
The assembled concrete column light steel sash composite wall section is characterized in that a light steel sash formed by welding light steel sash vertical C-shaped steel 3 and light steel sash transverse C-shaped steel 4 is poured in a precast concrete column 1, a horizontal countersunk bridge-cutoff self-tapping screw connecting piece 15 and a combined countersunk bridge-cutoff self-tapping screw connecting piece 16 sequentially penetrate through a steel wire mesh mortar surface layer formed by an outer leaf mortar layer 12 and an outer leaf steel wire mesh 13, a perlite plate 11, a polyphenyl insulation board 10 and an inner steel wire mesh mortar surface layer formed by an inner leaf connecting mortar layer 5 and an inner leaf steel wire mesh 6, the self-tapping connecting light steel sash extends into the precast concrete column 1 for anchoring, and the inner leaf steel wire mesh 6 and the light steel sash are welded through U-shaped steel wires 9. The steel wire mesh frame horizontal web wires 17, the steel wire mesh frame oblique web wires 18 and the outer leaf steel wire mesh 13 are welded, sequentially pass through the perlite plate 11, the polyphenyl insulation plate 10 and the inner leaf steel bar mesh 8 to be welded and anchored in the inner leaf concrete mortar layer 7. The assembled concrete column light steel frame composite wall section is connected with the precast concrete column 1 through a column self-tapping screw block connecting node 14.
The light steel sash vertical C-shaped steel 3 and the light steel sash horizontal C-shaped steel 4 are formed by welding C-shaped steel with vertical and horizontal spacing not more than 800, the light steel sash is welded at a position with a clear distance of 10mm from an inner leaf steel wire net 6 by adopting U-shaped steel wires 9 with the diameter of 2mm to be respectively welded to connect the steel wire net and the light steel sash, the horizontal and vertical spot welding spacing is not more than 200mm, the keel C-shaped steel section is 70mm in height, 50mm in width and plate thickness not less than 2mm, the light steel sash is provided with light steel sash flange grooves with the width of 140mm and the height of 60mm, so that a convex steel section with the clear distance of 140mm, the height of 60mm and the width of 60mm is formed, and the light steel sash C-shaped steel is anchored into the precast concrete column 1 from the positions with the clear distance of 10mm of steel bars distributed outside the stirrups of the precast column and the longitudinal stressed steel bars. The light steel frame with the protruding steel section is embedded into the column concrete for 10mm in a 10mm through high section, and the protruding steel section is anchored in the column concrete for 60mm. In order to facilitate the connection of the self-tapping screw with the web plate of the light steel sash, a round hole smaller than the diameter of the self-tapping screw is formed in the web plate of the light steel sash so as to facilitate the self-tapping screw to pass through.
The steel wire net frame horizontal web 17 and the steel wire net frame oblique web 18 are supporting steel wires for connecting the inner leaf steel wire net 8 and the outer leaf steel wire net 13 of the concrete column composite wall section, and are also supporting steel wire frames for connecting the outer leaf steel wire net 20 and the inner leaf steel wire net 24 of the composite filling wall section. The steel wire net frame consists of an inner leaf steel wire net, an outer leaf steel wire net and a steel wire net frame horizontal web 17 with the spot welding diameter of 2mm and a steel wire net frame oblique web 18 with the angle of 45 degrees upwards in an oblique direction, and the web penetrates through the perlite plate and the polyphenyl insulation plate and then stretches into the concrete mortar surface layer.
The composite filling wall section is formed by welding a steel wire net frame horizontal web 17, a steel wire net frame oblique web 18 and a filling wall outer leaf steel wire net 20, sequentially passing through a filling wall mortar outer leaf 19, a filling wall perlite plate 21 and a filling wall polyphenyl insulation board 22, welding with a filling wall inner leaf steel bar net 24 and anchoring on a filling wall concrete mortar inner leaf 23, and the steel wire net frame drawknot of each structural layer. The composite filling wall section is connected with the adjacent wall section through filling wall and concrete column wall section self-tapping screw block connecting node 25, and is connected with the precast concrete beam 26 through filling wall and beam self-tapping screw block connecting node 29.
The assembled concrete column light steel sash composite wall section is connected with the outer leaf steel wire mesh 13 of the composite filling wall section and the filling wall outer leaf steel wire mesh 20 through the outer leaf steel wire mesh cement mortar layer and then the strip 30 is smeared.
The inner leaf is connected with the mortar layer 5 and the inner leaf steel wire net 6, the mortar layer is a mortar layer with the bonding effect between the dovetail groove of the polyphenyl thermal insulation board and the precast concrete column 1, the net distance between the inner leaf steel wire net 6 and the polyphenyl thermal insulation board 10 with the dovetail groove is 10mm, the gap between the inner leaf steel wire net 6 and the dovetail groove of the polyphenyl thermal insulation board is smoothed by adopting a 14mm thick mortar belt with the intensity not lower than C20, the U-shaped steel wires 9 are in a connection structure of the inner leaf steel wire net 6 and the light steel frame, the bending flanges of the U-shaped steel wires are in steel wire spot welding with the inner leaf steel wire net 6, and the web members are welded with the light steel frame.
The inner leaf concrete mortar layer 7 is the wall inner leaf of the overhanging part of the composite wall section of the concrete column vertical to the surface of the concrete column. The thickness of the inner leaf concrete mortar layer 7 is 50mm, an inner leaf reinforcing steel bar net 8 with the diameter of 4mm and the interval of 200mm is arranged inside, and the inner leaf reinforcing steel bar net 8 is bent and stretches into the inner leaf connecting mortar layer 5 to overlap with the inner leaf steel wire net 6 by 100mm. The inner leaf reinforcement mesh 8 is connected with the precast concrete column 1 through a column self-tapping screw block connecting node 14.
The outer leaf mortar layer 12 is a 25mmm thick mortar layer with the outer side strength of the wallboard not lower than C20, an outer leaf steel wire mesh 13 with the diameter of 2mm and the interval of 50mm is arranged in the outer leaf mortar layer 12, and the mortar net protection layer of the steel wire mesh is 10mm.
The polyphenyl thermal insulation board 10 is a polyphenyl thermal insulation board with dovetail grooves at the joint of the polyphenyl thermal insulation board and the inner leaf connecting mortar layer 5. The perlite plate 11 is a fire-resistant layer of the wallboard, and the thickness of the perlite plate is 25mm.
The column self-tapping screw block connecting joint 14 is a connecting structure of the inner leaf concrete mortar layer 7 and the side face of the precast concrete column 1, an L-shaped force transmission steel plate is welded on stirrups of the reinforcement cage 2 of the concrete column and also serves as a connecting steel plate, a hole smaller than the diameter of a self-tapping screw is formed in a flange connecting area of the L-shaped force transmission steel plate, a flat steel plate is welded on the inner leaf reinforcement mesh 8 to serve as a force transmission steel plate, and a groove is reserved on the outer side of the flat steel plate welded on the inner flat reinforcement mesh by the inner leaf concrete mortar layer 7. The composite wall section pushes and welds the concrete column steel reinforcement cage by light steel sash from the outside when prefabricated component, and L shape connection steel sheet gets into the recess on the concrete column steel reinforcement cage, adopts self tapping screw to pass the self tapping screw hole on the L shape steel sheet, and self tapping connects the flat steel sheet on the interior leaf steel reinforcement net 8 to use high performance mortar trowelling groove.
The horizontal countersunk head bridge-cutoff self-tapping screw connecting piece 15 and the combined countersunk head bridge-cutoff self-tapping screw connecting piece 16 are web members of the light steel combined truss. The connecting piece is sunk into a countersunk fiber composite connecting piece with the size not smaller than 50, and the perlite-polyphenyl insulating layer is drilled through, and the light steel frame is connected by self tapping. The countersunk head fiber composite connecting piece is a connecting piece formed by one step, wherein the connecting piece is a square plate with the thickness of 3 x 60, a square plate with the thickness of 4 x 46, a hollow round rod with the outer diameter of 14mm and the inner diameter of 10mm and the length of 50mm in the middle, and a hollow round rod with the outer diameter of 14mm and the inner diameter of 6mm and the length of 20mm in the middle. The angle between the square plate of the countersunk fiber composite connecting piece of the horizontal countersunk bridge-cut-off self-tapping screw connecting piece 15 and the hollow round bar is 90 degrees, and the angle between the rectangular plate of the countersunk fiber composite connecting piece of the combined countersunk bridge-cut-off self-tapping screw connecting piece 16 and the hollow round bar is divided into 90 degrees penetrating through the horizontal long self-tapping screw and 45 degrees penetrating through the inclined upward long self-tapping screw, and the diameter of the screw cap of the steel self-tapping screw is 10mm, the screw bar is 6mm and the through length is threaded. The top and the bottom of the light steel sash vertical C-shaped steel 3 are provided with horizontal countersunk head bridge-cut-off self-tapping screw connecting pieces 15, and the middle part is provided with combined countersunk head bridge-cut-off self-tapping screw connecting pieces 16.
The outer leaf 19 of the filling wall mortar is a 25mmm thick mortar layer with the outer strength of the composite filling wall board not lower than C20, the outer leaf 19 of the filling wall mortar is internally provided with a steel wire mesh 20 of the outer leaf of the filling wall with the diameter of 2mm and the interval of 50mm, and the mortar net protection layer of the steel wire mesh is 10mm.
The filled wall perlite plate 21 and the filled wall polyphenyl insulation plate 22 are respectively a fireproof layer and an insulation layer of the composite filled wall.
The inner leaf 23 of the filling wall concrete mortar is internally provided with a reinforcing steel bar net 24 of the filling wall inner leaf with the diameter of 4mm and the interval of 200mm, the inner leaf 23 of the filling wall concrete mortar is connected with the left and right adjacent wall sections through a self-tapping screw assembly connecting node 25 of the filling wall and the concrete column wall sections, and is connected with the upper and lower precast concrete beams 26 through a self-tapping screw assembly connecting node 29 of the filling wall and the beams.
The self-tapping screw block connection node 25 of the filling wall and the concrete column wall section is a connection structure of the filling wall concrete mortar inner leaf and the concrete column composite wall section. The connecting steel plate with the self-tapping screw holes is placed in the groove of the inner leaf concrete mortar layer, the self-tapping screw is adopted to penetrate through the connecting steel plate self-tapping screw holes, the self-tapping is connected with the force transmission steel plate welded on the inner leaf steel bar net 24 of the filling wall and the force transmission steel plate welded on the inner leaf steel bar net 8 of the concrete column composite wall section, and the groove is filled with high-performance mortar.
The filling wall and beam self-tapping screw block connecting joint 29 is an L-shaped force transmission steel plate welded on the stirrup of a concrete beam reinforcement cage 27 and provided with a bolt hole, and is also used as a connecting steel plate, and the groove of the filling wall concrete mortar inner leaf 23 is attached to the welded flat steel pipe on the filling wall inner leaf reinforcement net 24, so that the self-tapping screw is adopted to self-tap and connect the welded force transmission flat steel plate of the filling wall inner leaf reinforcement net 24. The L-shaped force transmission steel plate connected with the upper end of the filling wall is welded on the lower side of the stirrup and is embedded in the beam, the L-shaped force transmission steel plate connected with the lower end of the filling wall is welded on the upper side of the beam stirrup, and the L-shaped force transmission steel plate is anchored in the beam after the beam slab concrete post-pouring strip 32 is poured.
The back plastering strip 30 of the outer leaf steel wire mesh cement mortar layer is a connection structure of an outer leaf mortar layer of an adjacent concrete column composite wall section and a filling composite wall section, 75mm wide mortar is reserved at the end part of an outer She Shajiang layer 12 of the concrete column composite wall section and the end part of an outer leaf 19 of the filling composite wall section filling wall mortar layer, the back plastering strip is banded in 150mm wide, 2mm diameter and 50mm spacing reinforced steel wire meshes are banded in 150mm mortar back plastering strips at the butt joint positions of adjacent wallboards, and high-performance waterproof mortar plastering strips are adopted. The connection position of the external heat-insulating layer of the wallboard is butted with the perlite plates, and the rabbet of the polyphenyl heat-insulating plate is butted after cement-based mucilage is smeared, so that the joint integrity and the waterproof capability are improved.
When the composite wall is designed and manufactured, firstly, the positions of structural beams and columns are determined according to the design of the building structure, and the precast concrete columns, the concrete beams, the size of the building plate and the reinforcement are designed. The method comprises the steps of designing a concrete column composite wall and a composite filling wall, determining the thickness of an insulating layer according to the climate conditions of a building region, determining the thickness of an outer reinforcing steel net mortar surface layer and the thickness of a perlite plate according to the requirements of building fire resistance, water resistance and weather resistance, determining the thickness of an inner mortar surface layer according to the stress requirements of an outer insulating system, arranging a light steel frame, designing a steel wire net frame and light steel combined truss according to the stress requirements, and determining the size and the thickness of a self-tapping screw assembly node steel plate, the arrangement mode and the number of self-tapping screws. Determining relevant design parameters of the composite filling wall, designing and stress checking the joint structure of the assembled concrete column and the composite filling wall, drawing detailed structural drawings according to the design scheme, and carrying out prefabricated member manufacturing, transportation and on-site assembly construction.
The specific method is as follows:
I. fabricated concrete column composite wall section, precast beam and floor slab preparation process
The method comprises the steps of processing a light steel sash in a factory, binding a concrete column reinforcement cage, a concrete beam reinforcement cage and a floor slab reinforcement net, purchasing a polyphenyl insulation board and a perlite board, and cutting and assembling the polyphenyl insulation board and the perlite board into required sizes;
The second step, the light steel frame is installed and positioned on the assembled concrete column steel reinforcement cage, the inner leaf steel wire mesh is connected on the light steel frame through U-shaped steel wires, a horizontal force transmission steel plate is welded on the inner steel reinforcement mesh, an L-shaped force transmission steel plate with a self-tapping screw hole is welded on the concrete column steel reinforcement cage stirrup, the self-tapping screw is adopted to pass through the self-tapping screw hole of the L-shaped connecting plate to self-tap and connect the force transmission steel plate on the inner steel wire mesh, and the thickness of an inner mortar layer is spaced between the light steel frame and the dovetail groove surface of the polyphenyl insulation plate through cushion blocks such as engineering plastics, and the polyphenyl insulation plate, the perlite plate and the outer leaf steel wire mesh are positioned;
The third step, the horizontal web wires of the steel wire net frame and the oblique web wires of the steel wire net frame sequentially penetrate through the perlite plate and the polyphenyl thermal insulation plate, and the two ends of the web wires of the steel wire net frame, the outer leaf steel wire net and the inner leaf steel wire net are spot welded to form the steel wire net frame;
pouring an inner mortar surface layer and an outer mortar surface layer, reserving mortar strips on the upper section, the lower section, the left section and the right section of the wall section, and curing;
Fifthly, taking a steel wire grid mortar-perlite-polyphenyl thermal insulation structure as a bottom die, pouring precast column concrete, pouring concrete of precast beams and floor slabs, and curing;
II. Preparation process of bearing steel wire rack mortar-perlite-polyphenyl thermal insulation composite filling wall
Step six, processing an outer leaf steel wire mesh of the filling wall, a perlite plate of the filling wall, a polyphenyl thermal insulation plate of the filling wall and an inner leaf steel bar mesh of the concrete mortar, welding one ends of horizontal and oblique web wires of the steel wire mesh frame with the outer leaf steel wire mesh of the filling wall, and sequentially passing through the perlite plate, the polyphenyl thermal insulation plate and the inner leaf steel bar mesh for welding;
pouring outer leaves of composite wall mortar and inner leaves of composite wall concrete mortar in factories, reserving the outer leaves of the filled wall mortar, then plastering mortar strips, and welding grooves reserved on the outer sides of the force transmission steel plates on the reinforcing steel bar meshes by the inner leaves of the filled wall concrete mortar;
The eighth step, maintenance and bearing of the steel wire rack mortar-perlite-polyphenyl thermal insulation composite filling wall, and transportation to a construction site;
III, assembling construction flow
Hoisting and positioning the precast concrete column and the composite wall section, and overlapping and binding longitudinal stress steel bars in a post-cast area of the upper layer concrete column and the lower layer concrete column; hoisting and positioning the precast concrete beam and the concrete floor slab, extending longitudinal steel bars with anchor plates at the precast concrete beam ends into post-cast strips at beam column node areas, and penetrating the steel bars of the precast concrete slab into a steel bar cage formed by stirrups and longitudinal bars exposed at the upper parts of the precast beams;
The tenth step is that the composite filling wall is pushed between the adjacent prefabricated concrete column composite wall sections from the side, the force transmission steel plates welded on the inner leaf steel bar nets of the concrete column composite wall sections are butted with the force transmission flat steel plates on the inner leaf steel bar nets of the composite filling wall, the connecting steel plates with self-tapping screw holes are put in the mortar layer grooves, the self-tapping screw holes penetrating the connecting steel plates are adopted to self-tap the connecting force transmission steel plates, the L-shaped force transmission steel plates on the prefabricated beams are tightly adhered to the force transmission flat steel plates on the inner leaf steel bar nets of the composite filling wall, the self-tapping screw holes penetrating the L-shaped connecting plates are adopted to self-tap the connecting force transmission steel plates, and the high-performance mortar is adopted to level the inner concrete mortar layer grooves;
Binding additional reinforcing steel bars in the mortar strips between the prefabricated concrete column composite wall section and the composite filling wall section, and trowelling the mortar strips by adopting high-performance heat-insulating mortar;
and twelfth, coating the outer surface of the wall with outer wall paint, and making the inner surface of the wall into an inner decorative surface layer.
The present invention is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present invention and the inventive concept thereof, can be replaced or changed within the scope of the present invention.
Claims (8)
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| CN202211691924.1A CN116044053B (en) | 2022-12-27 | 2022-12-27 | Concrete frame prefabricated light steel composite truss supporting steel wire mesh mortar-perlite-polystyrene composite enclosure wall and its construction method |
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| CN118911443B (en) * | 2024-10-10 | 2025-02-07 | 中铁城建集团建筑科技有限公司 | Floor-free support equipment for assembled structural floor slab and construction method |
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