CN220414634U - Assembly floor without formwork - Google Patents

Abstract

A formwork-free assembled floor slab is formed by combining reinforced fiber cement boards into a bottom die assembly, connecting angle steel for the bottom die assembly, a floor slab bottom die assembly joint, main beam steel bars, rib beam steel bars, constructional steel bars, a built-in die and concrete; the bottom die assembly formed by splicing the reinforced fiber cement boards is a disassembly-free bottom die assembly for permanently using the assembled floor; the reinforced fiber cement plates are spliced into a strip-shaped bottom die assembly through angle steel for connection; the angle steel for connection adopts a fixing piece with functionality; the width of the strip-shaped bottom die assembly is the sum of the width of the rib beam and the width of the side of the built-in die; the assembled composite floor slab constructional steel bars are arranged at the upper end of the built-in mould; the concrete is directly compounded with the disassembly-free bottom die assembly and the built-in die to form the formwork-free assembled floor slab.

Description

Assembly floor without formwork

Technical Field

The utility model relates to an assembled building system technology, in particular to a formwork-free assembled floor slab technology.

Background

In order to adjust the construction industry structure, improve the construction quality and benefit, realize energy conservation and environmental protection and reduce the construction cost, the national regulations reach the carbon peak target in 2030, and the assembled construction is a gripper; the development of the existing fabricated reinforced concrete frame structure system is relatively lagged, in the prefabricated reinforced concrete structure project, an assembled reinforced concrete shear wall structure is mainly adopted, and the fabricated reinforced concrete frame structure is a part or all of prefabricated load-bearing shear wall components, and stressed steel bars are connected in a sleeve grouting mode; the external wall panel generally adopts the prefabricated sandwich wall panel technology; the floor slab mostly adopts truss plates; and (3) the large-span factory building project is just started, and the double T floor slabs are overlapped after the cast-in-place concrete frame structure is adopted.

The prefabricated reinforced concrete frame structure is an assembled building key and difficult point, and has main problems: (1) the beam column has no joints, the double T-shaped floor slab or the superposed truss floor slab is superposed on the cast-in-situ reinforced concrete frame by the assembled reinforced concrete frame structure, and the superposed height is the sum of the cast-in-situ reinforced concrete frame beam and the double T-shaped floor slab; the latter truss floor area is smaller, and only can be overlapped with the secondary beam, so that the construction difficulty is increased, and the same overlapping height is increased, which is the root cause that both cannot be applied in building construction with reinforced concrete frame structures. (2) The truss composite floor area is small, and the truss composite floor can only act on the composite templates of the small-span floor. (3) The two PC components are connected by adopting a sleeve grouting mode, so that the cost of the sleeve is often low from the price difference of the steel bars, and the cost is high. In view of the foregoing, there is a need for systematic innovation of fabricated reinforced concrete frame structure nodes and rebar junctions.

In order to effectively solve the problems of the assembled reinforced concrete frame structure, for example, the inventor declares ZL201610919684.4 as an assembled building cavity floor slab, ZL201711475323.6 as an assembling method of the reinforced concrete frame structure, ZL201910577422.8 as a connecting method of a main beam and a structure support, ZL201910577446.3 as a connecting method of a prefabricated frame floor slab steel bar, and the like. Through the utility model, the connection between beam column nodes and the steel bars is optimized on the premise of ensuring the safety of the assembled building structure; the whole innovation of the assembled reinforced concrete frame structure system solves the core technology of the assembled reinforced concrete frame structure and promotes the development of the assembled building industry and the progress of the building science and technology.

In order to convert the existing fabricated building composite floor slab technology and hollow floor slab technology into a formwork-free fabricated floor slab structure technology, the inventor applies the cast-in-situ hollow floor slab technology to the fabricated floor slab on the basis of the existing background technology so as to form a novel formwork-free fabricated floor slab structure system; the method comprises the steps of industrially producing a disassembly-free bottom die and a built-in die in batches in a factory, organically combining the built-in die with the disassembly-free bottom die on site to form a beam slab die of the formwork-free assembled floor, and then pouring concrete to form the formwork-free assembled floor. The method is used for transforming and upgrading the existing fabricated laminated slab technology and hollow floor system technology, is applied to an assembled reinforced concrete frame structure, and solves the urgent need in the field of innovation of the fabricated building due to the fact that the fabricated building technology is adopted in the large-span building.

Disclosure of Invention

The utility model aims to organically combine a strip-shaped bottom die assembly which is formed by splicing reinforced fiber cement plates into a large area with an internal die to form a beam plate die required by a building cover with a large-span frame structure, and then, casting concrete to construct an assembled floor without supporting the die; the utility model adopts the reinforced fiber cement board with the hardness and softness as a strip-shaped bottom die assembly and the built-in die form formwork-free assembled floor slab technology which is spliced by angle steel for connection to replace the truss laminated slab technology in the shear wall structure system with heavy weight, small area and small span; at the same time: the strip-shaped bottom die free of disassembly avoids the need of arranging a floor template on the cast-in-situ hollow floor, and solves the problems of floating resistance, displacement, complex process and the like caused by the need of building the floor bottom plate by cast-in-situ concrete at the bottom of the cast-in-situ hollow floor filling body; the method has the advantages that the formwork-free fabricated floor slab technology is formed, the existing frame structure technology system is optimized, and a foundation is laid for realizing large-span and open beam-free fabricated buildings; the method not only improves the overall safety of the building, but also solves the problems of the prior truss laminated slab floor system technology that truss plates are laminated on the upper surface of the beam to form a bright beam, the bright beam occupies the interlayer height, the site construction process is complex, the construction cost is high, the engineering progress is slow and the like.

The utility model has the technical scheme that the formwork-free assembled floor slab is formed by combining reinforced fiber cement boards into a bottom die assembly, connecting angle steel for the bottom die assembly, a floor slab bottom die assembly joint, girder steel bars, rib beam steel bars, constructional steel bars, built-in dies and concrete; the bottom die assembly formed by splicing the reinforced fiber cement boards is a disassembly-free bottom die assembly for permanently using assembled floors: the reinforced fiber cement plates are spliced into a strip-shaped bottom die assembly through angle steel for connection; the angle steel for connecting the bottom die assembly is provided with a functional fixing piece; the width of the strip-shaped bottom die assembly is the sum of the width of the rib beam and the width of the side of the built-in die; the girder steel bars are arranged on the bottom die assembly formed by splicing the reinforced fiber cement boards; longitudinal rib beam steel bars are arranged on the upper edges of the longitudinal joint seams where the bottom die assemblies are spliced; the built-in die is arranged between two connecting angle steels of the strip-shaped bottom die assembly, and the two strip-shaped bottom die assemblies are spliced to form the width of the longitudinal rib beam; the assembled floor constructional steel bars are arranged at the upper end of the built-in die; the concrete is directly compounded with the permanently used disassembly-free bottom die assembly and the built-in die to form the formwork-free assembled floor slab.

In another preferred scheme, the reinforced fiber cement board is formed by compounding reinforced fiber cement under the action of special equipment; the reinforced fiber cement board has hardness and softness, at least one surface is a rough surface, and the thickness of the reinforced fiber cement board is less than or equal to 20mm; the density of the reinforced fiber cement board is less than 1600kg/m3.

In another preferred scheme, the floor slab bottom die assembly joint is divided into a longitudinal joint and a transverse joint; the upper surface of the longitudinal joint is compounded with reinforced concrete rib beams; and the upper surface of the transverse joint is compounded with anti-cracking steel mesh mortar.

In another preferred scheme, the height of stirrups of the girder steel bars and the rib steel bars is 20mm shorter than that of the built-in mould.

In another preferred scheme, the connecting angle steel spliced into the strip-shaped bottom die assembly is arranged at the two sides of the strip-shaped bottom die assembly within 150 mm; the exposed part of the functional fixing piece is sunk into the concrete.

In another preferred scheme, two side surfaces of the built-in die are arranged between two connecting angle steels to form a longitudinal rib beam width part; and the other two side surfaces of the built-in die are arranged in the transverse direction of the strip-shaped bottom die assembly, and are provided with built-in die positioning pieces to form the width of the transverse rib beam.

The utility model relates to a formwork-free assembled floor, which is mainly formed by organically combining an internal formwork with a disassembly-free bottom formwork component on a construction site, so as to form a beam slab mold required by a floor with a large-span frame structure, and then, a formwork-free assembled floor is built by casting concrete.

A formwork-free assembled floor slab technology is carried out on the basis of a building structure design drawing, the building structure design drawing is decomposed, and the drawing is decomposed into N groups of reinforced fiber cement board bottom dies which are permanently used as an assembled floor slab disassembly-free bottom die assembly on the premise of meeting the main specification aiming at the geometric dimension of a combined floor slab column net; the reinforced fiber cement board bottom die assembly is formed by splicing N reinforced fiber cement boards through angle steel for connection; the reinforced fiber cement board is formed by compounding reinforced fiber cement under the action of special equipment; the reinforced fiber cement board has hardness and softness, at least one surface is a rough surface, and the thickness of the reinforced fiber cement board is less than or equal to 20mm; the density of the reinforced fiber cement board is less than 1600kg/m3. The splicing length of each strip-shaped bottom die assembly is the length of a column grid, and the width of each bottom die assembly is the sum of the width of the longitudinal rib beam and the width of the built-in die; the optimal size specification of the width of the strip-shaped bottom die assembly is 1100mm; arranging angle steel for connection at the position 100mm away from two edges of the bottom die assembly, and after splicing the reinforced fiber cement plates to the length of the column grid, respectively fixing the angle steel at the positions 100mm away from the two edges of the spliced reinforced fiber cement plates by using tapping screws; the relative distance between the angle steel for connection in the strip-shaped bottom die assembly is 900mm; the angle steel for connection is arranged at two outer sides of the built-in die, and the lower end of the built-in die with the width of 900mm is arranged in the relative distance of the angle steel for connection; splicing the two bottom die assemblies, and forming a rib beam width of 200mm by two adjacent built-in dies; longitudinal rib beam steel bars are arranged in the rib beam width space; the longitudinal rib beam steel bars are arranged on the longitudinal joint seams, so that the rib beam concrete not only effectively compounds the bottom die assembly, but also permanently solves the problem of cracking of the longitudinal joint seams; an anti-cracking steel net is compounded on the upper surface of the transverse split joint of the bottom die assembly, a micro-concrete mortar infiltration channel is arranged at the lower end of the built-in die, and when concrete is poured and vibrated, the micro-concrete mortar is caused to promote the anti-cracking steel net to be organically compounded with the transverse split joint and the bottom die assembly through the infiltration channel. In order to prevent the built-in die from moving in the transverse direction, a positioning piece is arranged in the transverse direction of the strip-shaped bottom die assembly; the built-in mould is made of steel mesh body material optimally. In order to ensure that the bottom die assembly is compounded with the concrete on the surface of the beam bottom so as to prevent poor splitting of the compounding, the length of the self-tapping screw is exposed by more than 10mm, the exposed part of the self-tapping screw is truly connected and sunk into the concrete, and the bottom die of the reinforced fiber cement board is further reinforced and never falls off or falls. The non-exposed beam steel bars are arranged on the bottom die assembly of the reinforced fiber cement board; the height of stirrups of the girder steel bars and the rib steel bars is 20mm shorter than that of the built-in mould. In the bottom module at the crossing part of the longitudinal and transverse girders, the holes for the column steel bars in the column frame to pass through are reserved, and the area of the holes is smaller than the sectional area of the column frame. When the special air delivery duct is arranged in the assembled floor slab, the fire-proof grade of the floor slab is ensured, and the special air delivery duct is manufactured in the built-in mould by adopting the A-grade nonflammable material. The formwork-free assembled floor slab only needs to lay a cross beam on a building steel pipe support frame, a reinforced fiber cement board bottom die assembly is directly placed on the cross beam, and after the process is repeated, the built-in die and the bottom die assembly are used as girder, rib girder and floor slab dies required for forming a floor slab with a large-span frame structure; and placing beam steel bars in a space with the width of the beam formed by the die, binding and casting concrete to obtain the required formwork-free assembled floor.

Drawings

Fig. 1 is a block diagram of an assembled floor without formwork according to the present utility model.

FIG. 2 is a schematic view of a monolithic die assembly of the present utility model.

FIG. 3 is a schematic view showing the assembly of two bottom mold assemblies according to the present utility model.

FIG. 4 shows an embodiment of the bottom mold assembly of the present utility model in combination with a built-in mold.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

FIG. 1 is a block diagram of an assembled floor without formwork according to the present utility model, and in the practice of the present utility model, an assembled floor without formwork 1; the columns 2 form a column net of the formwork-free assembled floor slab 1; the main beam 3 and the column 2 form a reinforced concrete frame structure; the formwork-free assembled floor slab only needs to lay a cross beam 5 on a supporting frame of a building steel pipe 4, N reinforced fiber cement boards are spliced into a strip-shaped bottom die assembly 7 through connecting angle steel 6, and the bottom die assemblies 7 are respectively and directly laid on the cross beam 5 to form a bottom die of the formwork-free assembled floor slab 1; in the bottom module at the crossing part of the longitudinal and transverse girders, the holes for the column steel bars in the column frame to pass through are reserved, and the area of the holes is smaller than the sectional area of the column frame. The built-in die 8 is placed on the bottom die assembly 7, the built-in die 8 is placed on the bottom die assembly 7 to form the beam width of the main beam 3 and the rib beam 9, beam steel bars are arranged in the beam width space and bound, the construction steel bars 10 are paved on the upper surface of the built-in die 8 and bound, and concrete 11 is poured after reserved pre-buried and concealed project inspection is carried out.

FIG. 2 is a schematic view of a single-piece bottom die assembly of the utility model, as shown in FIG. 2, the reinforced fiber cement is adopted in a factory to produce a rigid-flexible composite bottom die assembly 7 under the action of special equipment, at least one surface is a rough surface, the thickness of the rough surface is less than or equal to 20mm, the density of the rough surface is less than 1600kg/m3, and the bonding seams 15 of N reinforced fiber cement plates are spliced into a strip-shaped bottom die assembly 7 through angle steel 6 for connection; the width of each strip-shaped bottom die assembly is the sum of the width of the longitudinal rib beam 9 and the width of the built-in die 8; the width of the bottom die assembly 7 is 1100mm in optimal dimension; and connecting angle steel 6 is arranged at the positions of 100mm on two sides of the bottom die assembly, and after the reinforced fiber cement plates are spliced to the length of the column grid, the angle steel is fixed on the spliced reinforced fiber cement plates by self-tapping screws 12.

FIG. 3 is a schematic diagram showing the assembly of two bottom die assemblies according to the present utility model, as shown in FIG. 3, a built-in die 8 is placed in the relative distance between two angle steels 6 of the bottom die assembly 7, the two bottom die assemblies 7 are assembled to form a longitudinal joint 13, and two adjacent built-in dies form a longitudinal rib width 91; the rib steel bars 92 are arranged in the rib width 91; the longitudinal rib beam 9 is arranged on the longitudinal joint 13, and the longitudinal rib beam 9 concrete not only effectively compounds the bottom die assembly 7, but also permanently solves the problem of cracking of the longitudinal joint 13.

FIG. 4 shows an embodiment of the combination of the bottom mold assembly and the built-in mold of the present utility model, wherein the angle steel is fixed on the reinforced fiber cement board 14 by self-tapping screws, and the exposed part of the length of the self-tapping screws 12 is truly immersed in the concrete to prevent the reinforced fiber cement board from falling off or falling; the upper surface of the transverse split joint seam 15 of the reinforced fiber cement board 14 is provided with an anti-cracking steel net 16, the lower end of the built-in mould 8 is provided with a micro-concrete mortar infiltration channel 17, and when concrete is poured and vibrated, the micro-concrete mortar is caused to pass through the infiltration channel to promote the anti-cracking steel net 16 to be organically compounded with the transverse split joint seam 15 and the reinforced fiber cement board 14; when the steel mesh body built-in die is adopted, the steel mesh on the lower surface of the steel mesh body built-in die is used as the anti-cracking steel mesh of the joint 15, so that the anti-cracking of the joint 15 is realized, and the overall strength of the fiber cement board is increased. In order to prevent the longitudinal movement of the built-in die, a positioning piece 18 is arranged in the transverse direction of the bottom die assembly; the built-in mould is made of steel mesh body material optimally.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the specific embodiments of the present utility model without departing from the spirit and scope of the present utility model, and it should be covered by the scope of the claims of the present utility model.

Claims (6)

1. A formwork-free assembled floor slab is formed by combining reinforced fiber cement boards into a bottom die assembly, connecting angle steel for the bottom die assembly, a floor slab bottom die assembly joint, main beam steel bars, rib beam steel bars, constructional steel bars, a built-in die and concrete; the bottom die assembly formed by splicing the reinforced fiber cement boards is a disassembly-free bottom die assembly for permanently using assembled floors: the reinforced fiber cement plates are spliced into a strip-shaped bottom die assembly through angle steel for connection; the angle steel for connecting the bottom die assembly is provided with a functional fixing piece; the width of the strip-shaped bottom die assembly is the sum of the width of the rib beam and the width of the side of the built-in die; the girder steel bars are arranged on the bottom die assembly formed by splicing the reinforced fiber cement boards; longitudinal rib beam steel bars are arranged on the upper edges of the longitudinal joint seams where the bottom die assemblies are spliced; the built-in die is arranged between two connecting angle steels of the strip-shaped bottom die assembly, and the two strip-shaped bottom die assemblies are spliced to form the width of the longitudinal rib beam; the assembled floor constructional steel bars are arranged at the upper end of the built-in die; the concrete is directly compounded with the permanently used disassembly-free bottom die assembly and the built-in die to form the formwork-free assembled floor slab.

2. A formwork-free fabricated floor slab as claimed in claim 1, wherein said reinforced fiber cement panel is formed by compounding reinforced fiber cement under the action of special equipment; the reinforced fiber cement board has hardness and softness, at least one surface is a rough surface, and the thickness of the reinforced fiber cement board is less than or equal to 20mm; the density of the reinforced fiber cement board is less than 1600kg/m ³ 。

3. A formwork-free fabricated floor slab as claimed in claim 1, wherein said floor slab die assembly joint is divided into a longitudinal joint and a transverse joint; the upper surface of the longitudinal joint is compounded with reinforced concrete rib beams; and the upper surface of the transverse joint is compounded with anti-cracking steel mesh mortar.

4. A formwork-free assembled floor as claimed in claim 1, wherein the stirrup height of the main beam rebar and rib rebar is 20mm shorter than the height of the built-in formwork.

5. A formwork-free fabricated floor slab as claimed in claim 1, wherein the angle steel for connection of the split strip-shaped bottom formwork assembly is arranged within 150mm of the distance between both sides of the strip-shaped bottom formwork assembly; the exposed part of the functional fixing piece is sunk into the concrete.

6. A formwork-free fabricated floor slab as claimed in claim 1, wherein both side surfaces of said internal formwork are disposed between two connecting angle steels to form a longitudinal rib beam width portion; and the other two side surfaces of the built-in die are arranged in the transverse direction of the strip-shaped bottom die assembly, and are provided with built-in die positioning pieces to form the width of the transverse rib beam.