WO2021258685A1

WO2021258685A1 - Cast-in-place concrete cage cavity floor slab

Info

Publication number: WO2021258685A1
Application number: PCT/CN2020/138294
Authority: WO
Inventors: 陈星岑; 刘春�; 陈跃军
Original assignee: 阿博建材（昆山）有限公司
Priority date: 2020-06-24
Filing date: 2020-12-22
Publication date: 2021-12-30
Also published as: CN212957174U

Abstract

A cast-in-place concrete cage cavity floor slab (100), comprising a plurality of horizontally distributed and a plurality of longitudinally distributed ribs (1), a plurality of grids formed by the ribs (1), cage units (2) filled in the grids, and an upper flange plate (3) covering the ribs (1) and the cage units (2) and forming an upper surface of the cast-in-place concrete cage cavity floor slab (100). Each of the cage units (2) comprises an upper cover assembly (21), and a lower cover assembly (22) forming a three-dimensional structure together with the upper cover assembly (21).

Description

Cast-in-situ concrete cage hollow floor slab

This disclosure claims the priority of a Chinese patent application filed with the Chinese Patent Office with an application number of 202021194667.7 on June 24, 2020, and the entire content of the above application is incorporated into this disclosure by reference.

Technical field

The application belongs to the technical field of building structures, for example, it relates to a cast-in-situ concrete cage hollow floor.

Background technique

In the construction industry, while ensuring the compressive and shear strength requirements of the floor slab, it is also pursuing the construction method of "energy saving, environmental protection and emission reduction". With the development of technology, the steel mesh cage support technology has gradually become a new type of structural construction method when making the main structure of the building's load-bearing structure. In order to reduce the weight of the building itself, a new type of hollow floor structure came into being. Filling boxes are placed in the slab to form multiple hollow cavities. The hollow cavities are formed by the filling boxes, which can ensure the strength of the floor itself while also greatly reducing The weight of the floor slab. However, in the related art, the structural design of the filling box is too simple, its supporting effect is not good, and the lower flange plate is easy to crack, resulting in uneven thickness of the upper flange plate of the hollow floor, which affects the force of the floor and the structural safety.

Therefore, it is necessary to provide a new cast-in-situ concrete cage cavity floor to solve the above-mentioned problems.

Summary of the invention

The present application provides a cast-in-place concrete cage hollow floor slab, which can greatly improve the support strength of the hollow part of the floor slab, and improve the safety of the floor slab while satisfying the strong quantitative design.

This application is realized through the following technical solutions:

A cast-in-situ concrete cage cavity floor slab includes a plurality of horizontally distributed and a plurality of longitudinally distributed ribs, a cage unit filled in a plurality of grids formed by the ribs, and covering the ribs and Above the net cage unit and forming an upper flange plate on the surface of the cavity floor of the cast-in-place concrete net cage, the net cage unit includes an upper cover assembly and a lower cover assembly forming a three-dimensional structure together with the upper cover assembly , The upper cover assembly and the lower cover assembly are both formed by bending a metal mesh body, the metal mesh body includes a plurality of convex ribs arranged in parallel, and a fishbone mesh unit arranged between the convex ribs, The fish-bone net unit includes at least one fish-bone tail tendon, and at least one sub-wing unit arranged on each of the two sides of the fish-bone tail tendon, and the sub-wing unit includes at least one row of grid units. The grid unit includes a plurality of first stretched meshes distributed in parallel along the length direction of the fishbone tail tendons, and the first stretched meshes on the first side of the fishbone tail tendons and the fishbone tail tendons are formed with A plurality of first connection points, the fishbone tail tendons and the first stretched mesh bar on the second side of the fishbone tail tendons are formed with a plurality of second connection points, and the first connection points are connected to the The second connection points are staggered.

Description of the drawings

Figure 1 is a schematic cross-sectional structure diagram of an embodiment of the application;

Figure 2 is one of the schematic cross-sectional structure diagrams of another embodiment of the application;

Fig. 3 is a second schematic diagram of a cross-sectional structure of another embodiment of the application;

4 is a schematic diagram of the structure of the cage unit in the first embodiment of the application;

Figure 5 is one of the schematic diagrams of the structure of the net cage unit in the second embodiment of the application;

Fig. 6 is the second structural diagram of the net cage unit in the second embodiment of the application;

Fig. 7 is the third structural diagram of the net cage unit in the second embodiment of the application;

Fig. 8 is the fourth structural diagram of the net cage unit in the second embodiment of the application;

FIG. 9 is a schematic plan view of a top view structure of a metal mesh body in Embodiment 1 of the application; FIG.

10 is a schematic diagram of a partial enlarged structure of the metal mesh body in the first embodiment of the application;

FIG. 11 is one of the structural schematic diagrams of the metal mesh body in Embodiment 1 of the application;

Fig. 12 is the second structural diagram of the metal mesh body in the first embodiment of the application;

The numbers in the figure indicate:

100 cast-in-place concrete net cage cavity floor;

1 rib; 2 cage unit, 21 upper cover assembly, 211 upper plate part, 212 first side sealing plate, 213 second side sealing plate, 22 lower cover assembly, 221 bottom plate, 222 first support part, 223 The second oral support part, 224C support part, 23 bending lines, 24 internal support components; 3 upper flange plate; 4 lower flange mortar layer; 5 anti-cracking net; 6 lower flange plate;

800 metal mesh body; 81 convex ribs; 82 herringbone mesh units, 821 herringbone tail bars, 822 sub-wing units, 8221 mesh units, 82211 second stretched meshes, 82212 first stretched meshes, and 82213 first connection points , 82214 second connection point, 82215 third connection point, 82216 fourth connection point, 823 connection ribs.

detailed description

Example one:

Please refer to Figures 1 to 4 and Figure 9 to Figure 12, this embodiment is a cast-in-place concrete cage hollow floor 100, which includes a plurality of horizontally distributed and a plurality of longitudinally distributed ribs 1, filled in the ribs 1 The cage unit 2 in the plurality of grids formed around it covers the rib 1 and the cage unit 2 and forms an upper flange plate 3 on the upper surface of the floor, the cage unit 2 includes an upper cover assembly 21. The lower cover assembly 22 is bound with the upper cover assembly 21 to form a three-dimensional structure.

The upper cover assembly 21 and the lower cover assembly 22 can be connected together by binding, welding, clamping piece connecting pieces, and the like.

In an embodiment, the bottom of the cage unit 2 is provided with a lower flange mortar layer 4, and the lower surface of the lower flange mortar layer 4 and the lower surface of the rib 1 form the lower surface of the floor. The lower flange mortar layer 4 covers the bottom net body of the net cage unit 2. In order to strengthen the tensile strength of the floor slab, as shown in FIG. 2, in one embodiment, a crack-resistant net 5 penetrating the lower flange mortar layer 4 and the rib 1 is flatly laid on the inner and lower parts of the floor slab.

In another embodiment, a lower flange plate 6 is provided below the rib 1 and the cage unit 2. The thickness and reinforcement of the lower flange plate 6 can be determined by the structural engineer according to the actual situation of the project. The lower surface of the lower flange plate 6 forms the lower surface of the floor slab. The net cage unit 2 is arranged on the lower flange plate 6, and a lower flange mortar layer 4 is arranged at the bottom. The lower flange mortar layer 4 covers the bottom net body of the net cage unit 2.

The upper cover assembly 21 and the lower cover assembly 22 are both formed by bending a metal mesh 800.

The metal mesh body 800 includes a plurality of convex ribs 81 arranged in parallel, and a herringbone mesh unit 82 arranged between the convex ribs 81.

The convex rib 81 has a compressive effect in the thickness direction and can improve the rigidity of the mesh. The cross-sectional shape of the convex rib 81 can be V-shaped, or inverted V-shaped, or semi-circular arch, or U-shaped, or inverted U-shaped, or M type, or W type, etc. By providing the ribs 81 that are compressed in the thickness direction to increase the rigidity of the mesh, the ribs 81 are elastically deformed when compressed and play a compression-resistant effect.

The fishbone net unit 82 includes at least one fishbone tail tendon 821 and at least one sub-wing unit 822 arranged on each of the two sides of the fishbone tail tendon 821. When there are multiple sub-wing units 822 on each side of the fishbone tail tendon 821, two adjacent sub-wing units 822 are connected together by a connecting rib 823.

The sub-wing unit 822 may be a grid structure, which includes at least one column of grid units 8221, and the grid unit 8221 includes a plurality of first stretched mesh bars 82212 distributed in parallel along the length direction of the fishbone tail tendons. When the sub-wing unit 822 When the grid unit 8221 is arranged in 2 rows or more, the grid unit 8221 also includes the first stretched mesh bar 82212 that is arranged parallel to the fishbone tail bar 821 and connects all the two adjacent grid units 8221. The second pull mesh bar 82211. The second pulling rib 82211 is arranged parallel to the convex rib 81.

The second stretched mesh bars 2212 or the connecting tendons 823 or the first stretched mesh bars 82212 on both sides of the fishbone tail tendons 821 can be distributed in the shape of "her" or "in", or parallel and non-collinear. Optionally, the second stretched mesh bars 2212 or the connecting tendons 823 or the first stretched mesh bars 82212 on both sides of the fishbone tail tendons 821 are distributed in a "her" or "in" shape.

The number of the sub-wing units 822 on both sides of the connecting rib 823 or the fishbone tail rib 821 may be the same or different. The number of grid units 8221 in the sub-wing units 822 on both sides of the connecting rib 823 or the fishbone tail rib 821 can be the same or different, and can be combined and designed flexibly according to requirements.

In one embodiment, the first stretched mesh bar 82212 and the second stretched mesh bar 82211 are arranged at a set angle. In one embodiment, all the first stretched mesh bars 82212 located on the same side of the second stretched mesh bar 82211 are distributed in parallel and obliquely. In one embodiment, all the first stretched mesh bars 82212 located on both sides of the second stretched mesh bar 82211 are distributed obliquely in parallel.

The fishbone tail tendon 821 and the fishbone tail tendon 821 are formed with a plurality of first connection points 82213 on the first side of the fishbone tail tendon 821 and the fishbone tail tendon 821 on the second side. The stretched mesh bar 82212 is formed with a plurality of second connection points 82214, and the first connection points 82213 and the second connection points 82214 are staggeredly distributed. The angle between the herringbone tail tendons 821 and the first stretched mesh tendons 82212 on both sides is equal.

The connecting ribs 823 and the first pulling nets 82212 on the first side of the connecting ribs 823 are formed with a plurality of third connecting points 82215, the connecting ribs 823 and the first pulling nets on the second side of the connecting ribs 823 The ribs 82212 are formed with a plurality of fourth connection points 82216, and the third connection points 82215 and the fourth connection points 82216 are staggered.

By staggering the first stretched mesh bars 82212 on both sides of the fishbone tail tendons 821 and the connecting tendons 823 (that is, the connecting points are interlacedly distributed), it is beneficial to stretch the mesh and form a three-dimensional mesh surface, and at the same time make the mesh better The expansion performance of the mesh enhances the crack resistance of the mesh.

By flexibly setting the number of herringbone tail tendons 821, sub-wing units 822 and

grid units

8221, 1 tail, 2 wings and 4 columns, 1 tail and 4 wings and 8 columns, 2 tails and 6 wings and 12 columns, and 1 tail and 2 wings and 6 columns can be formed , 1 tail, 2 wings, 8 rows, 1 tail, 4 wings, 12 rows of net structure, etc.

The lower cover assembly 22 includes a bottom plate portion 221, a first spoken support portion 222 and a second spoken support portion 223 respectively disposed at opposite ends of the bottom plate portion 221. The first oral support portion 222 and the second oral support portion 223 are formed by bending opposite ends of the metal mesh 800 toward each other three times, respectively.

The upper cover assembly 21 includes an upper plate portion 211, a first side sealing plate 212 and a second side sealing plate 213 that are bent downward from opposite ends of the upper plate portion 211 to close the openings at both ends of the lower cover assembly.

The metal mesh body 800 that is bent to form the upper cover assembly 21 and the lower cover assembly 22 is provided with a plurality of bending lines 23 perpendicular to the ribs 81.

In this embodiment, by designing a cage unit with a special structure in the floor slab, and cleverly setting the structure of the lower cover assembly, the lower cover assembly has its own oral support parts at both ends, which on the one hand strengthens the support strength of the side panels, and on the other On the one hand, it also provides a larger supporting surface for the upper cover, thereby improving the supporting strength of the overall structure of the cage. By designing a metal mesh structure with a special structure and using the metal mesh structure to make a cage unit, the overall strength of the cage unit is improved, and the supporting strength and safety of the floor slab are improved. In one embodiment, the fishbone tail tendons are provided to improve the strength and tensile strength of the mesh structure, and the fishbone tail tendons and the first stretched mesh bars on both sides of the connecting ribs are staggered and distributed, so that the mesh is stretched When opening holes, the formed mesh surface is a three-dimensional mesh surface, which can increase the bonding surface area with concrete or cement mortar in architectural decoration, improve bonding performance, and enhance crack resistance.

Embodiment two:

Please refer to Figures 5 to 8, the structure of the cavity floor slab 100 of the cast-in-place concrete cage of this embodiment is basically the same as that of the first embodiment. The difference is that: the lower cover assembly 22 includes a bottom plate portion 221 and a self-base plate portion 221 The opposite ends of the C-shaped supporting portion 224 are formed by folding upwards twice. The upper cover assembly 21 includes an upper plate portion 211, a first side sealing plate 212 and a second side sealing plate 213 that are bent downward from opposite ends of the upper plate portion 211 to close the openings at both ends of the lower cover assembly.

The net cage unit 2 also includes at least one inner support assembly 24 arranged in a cavity formed by the upper cover assembly 21 and the lower cover assembly 22. The upper and lower ends of the inner support assembly 24 are respectively connected to the upper cover assembly. 21. The lower cover assembly 22 resists and touches. The inner support assembly 24 is mainly used to support the upper cover assembly 21, bear the top load during construction, and improve the support strength of the net cage unit 2. The inner support component 24 is a hollow structure made of plates, nets, or pipes, and the horizontal cross-sectional shape of the hollow structure can be circular, elliptical, triangular, quadrilateral, pentagonal, and other loop structures. . The inner support component 24 can also be made of the metal mesh body 800.

Compared with related technologies, the cast-in-situ concrete cage hollow floor slab provided by this application has the following advantages: it can greatly improve the support strength of the hollow part of the floor slab, so that the force range and pressure bearing capacity of the top of the box are more reasonable, and the The design improves the safety of the floor slab at the same time, ensures that the thickness of the upper flange plate of the floor slab is uniform, and enhances the tensile performance of the lower flange plate. At the same time, the internal support components of the cage are convenient and small in size, which can reduce the cage and cast-in-situ concrete. The cost of the cavity floor. In one embodiment, by designing a cage unit with a special structure in the floor slab, and cleverly setting the structure of the lower cover assembly, the lower cover assembly has its own oral support parts at both ends, which on the one hand strengthens the side board support Strength, on the other hand, it also provides a larger support surface for the upper cover, thereby improving the support strength of the overall structure of the cage; and by designing a special structure of the metal mesh structure, the metal mesh structure is used to make the cage unit , Improve the overall strength of the cage unit, improve the supporting strength and safety of the floor slab.

Claims

A cast-in-situ concrete cage cavity floor slab includes a plurality of horizontally distributed and a plurality of longitudinally distributed ribs, a cage unit filled in a plurality of grids formed by the ribs, and covering the ribs and The upper flange plate above the net cage unit and forming the upper surface of the cavity floor of the cast-in-place concrete net cage; the net cage unit includes an upper cover assembly, and a lower cover assembly that forms a three-dimensional structure together with the upper cover assembly , The upper cover assembly and the lower cover assembly are both formed by bending a metal mesh body, the metal mesh body includes a plurality of convex ribs arranged in parallel, and a fishbone mesh unit arranged between the convex ribs, The fish-bone net unit includes at least one fish-bone tail tendon, and at least one sub-wing unit arranged on each of the two sides of the fish-bone tail tendon, and the sub-wing unit includes at least one row of grid units. The grid unit includes a plurality of first stretched meshes distributed in parallel along the length direction of the fishbone tail tendons, and the first stretched meshes on the first side of the fishbone tail tendons and the fishbone tail tendons are formed with A plurality of first connection points, the fishbone tail tendon and the first stretched mesh bar on the second side of the fishbone tail tendon are formed with a plurality of second connection points, and the first connection points are connected to the The second connection points are staggered.
The cast-in-place concrete cage cavity floor of claim 1, wherein the bottom of the cage unit is provided with a lower flange mortar layer, the lower surface of the lower flange mortar layer and the lower surface of the rib The lower surface of the cavity floor of the cast-in-situ concrete cage is formed, and the thickness of the lower flange mortar layer is between 15-50 mm.
The cast-in-place concrete cage hollow floor slab according to claim 2, wherein the lower part of the floor slab is flatly laid with an anti-cracking net penetrating the lower flange mortar layer and the ribs.
The cast-in-place concrete cage cavity floor slab according to claim 1, wherein a lower flange plate is provided under the rib and the cage unit; the lower surface of the lower flange plate forms the cast-in-place The lower surface of the concrete cage cavity floor; the cage unit is arranged on the lower flange plate, and the bottom of the cage unit is provided with a lower flange mortar layer.
The cast-in-situ concrete cage cavity floor slab according to claim 1, wherein the upper cover assembly includes an upper plate portion, and two lower cover assemblies that are bent downward from opposite ends of the upper plate portion to close the lower cover assembly Side sealing board.
The cast-in-situ concrete cage cavity floor slab according to claim 1, wherein the lower cover assembly includes a bottom plate portion, a first spoken support portion and a second spoken support portion respectively disposed at opposite ends of the bottom plate portion .
The cast-in-place concrete net cage cavity floor slab according to claim 1, wherein the lower cover assembly comprises a bottom plate part and a C-shaped support part formed by two bending upwards from opposite ends of the bottom plate part.
The cast-in-place concrete net cage cavity floor slab according to claim 1, wherein the net cage unit further comprises at least one inner support assembly arranged in a cavity formed by the upper cover assembly and the lower cover assembly; The upper end and the lower end of the inner support assembly are in abutting contact with the upper cover assembly and the lower cover assembly, respectively.
The cast-in-place concrete cage hollow floor slab according to claim 8, wherein the inner support component is a hollow structure made of plates, nets, or pipes.
The cast-in-place concrete cage hollow floor slab according to claim 9, wherein the horizontal cross-sectional shape of the hollow structure is a circle, or an ellipse, or a triangle, or a quadrilateral, or a pentagon.
The cast-in-place concrete net cage cavity floor slab according to claim 8, wherein the inner support component is a vertical solid support structure.