A prefabricated combined cavity floor and its construction technology

Abstract

The present invention discloses a prefabricated combined cavity floor slab, which relates to the technical field of assembled buildings. The device comprises at least one cavity floor slab and at least two supporting beams. The cavity floor slab comprises a panel, an intermediate plate, a bottom plate, a connecting piece and at least three edge sealing plates. The panel, the intermediate plate and the bottom plate are connected in sequence. The edge sealing plate is arranged on the outer side of the intermediate plate and encloses the panel, the intermediate plate and the bottom plate as a whole. Both the panel and the bottom plate are provided with bidirectional force reinforcement and prestressed reinforcement. The panel is also provided with at least three panel columns, and the bottom plate is provided with at least three bottom plate columns, wherein the panel columns and the bottom plate columns are connected one by one through connecting pieces. The present invention realizes full prefabrication, standardized production, simple structure, detachable, convenient transportation and construction, can speed up the construction progress and reduce the number of personnel in on-site construction, and saves energy and protects the environment, reduces pollution and significantly improves efficiency during production and construction.

Description

Technical Field

[0001] The present invention relates to the technical field of assembled buildings, and in particular to a prefabricated combined cavity floor and a construction process thereof. Background Art

[0002] At present, the country is implementing the steel structure strategy and promoting prefabricated buildings to lay the foundation for the industrialization of housing. No matter how the connotation and extension of the building are expanded and updated, the building structure system is required to have the characteristics of multi-function, economy, scientific and technological content, energy saving and environmental protection, large market demand, and high safety factor. In order to make it possible to produce prefabricated components in a fixed shape, specification, and quantity, solving the problem of concrete floor slabs in prefabricated production and prefabricated construction is the most important, urgent, and largest task of the current prefabricated building system. The technical difficulty of traditional cast-in-place cavity floor slabs lies in the industrialized production of factories. Therefore, the transformation and reprocessing of industrially produced prefabricated prefabricated cavity components and the development of a prefabricated combined reinforced concrete cavity floor slab are major breakthroughs in realizing new technologies for prefabricated prefabricated structural systems, and have become an urgent need for innovation in the field of prefabricated building technology. Summary of the invention

[0003] In view of the defects existing in the prior art, the object of the present invention is to provide a prefabricated combined cavity floor and a construction process thereof.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0005] A prefabricated combined cavity floor comprises at least one cavity floor and at least two supporting beams. The cavity floor comprises a panel, an intermediate plate, a bottom plate, connectors and edge plates. The panel, the intermediate plate and the bottom plate are connected in sequence. The edge plates are arranged on the outside of the intermediate plate and enclose the panel, the intermediate plate and the bottom plate as a whole. Both the panel and the bottom plate are provided with bidirectional force reinforcement and prestressed reinforcement. The panel is also provided with at least three panel columns, and the bottom plate is provided with at least three bottom plate columns, wherein the panel columns and the bottom plate columns are connected one by one through connectors.

[0006] Based on the above technical solution, the top surface of the panel is flat, the bottom surface is curved, and the thickness of the plate between any two adjacent panel columns is an irregular shape that is thin in the middle and thick on both sides; the bottom surface of the base plate is flat, the top surface is curved, and the thickness of the plate between any two adjacent base plate columns is an irregular shape that is thin in the middle and thick on both sides.

[0007] Based on the above technical solution, the shape of the panel column is cylindrical, polygonal column, stepped shape with a larger top and a smaller bottom, inverted terrace shape or inverted cone shape, and the shape of the base plate column is cylindrical, polygonal column, stepped shape with a smaller top and a larger bottom, terrace shape or inverted cone shape.

[0008] On the basis of the above technical solution, the panel columns are provided with panel reserved holes, and the bottom plate columns are provided with bottom plate reserved holes.

[0009] On the basis of the above technical scheme, the base plate and the base plate columns are prefabricated as a whole; or the base plate and the base plate columns are prefabricated separately and connected by one or more of male and female tenon connection, screw and nut connection, tongue and groove connection, welding of reserved connecting parts, post-cast concrete connection, and engineering adhesive bonding; the panel and the panel columns are prefabricated as a whole; or the panel and the panel columns are prefabricated separately and connected by one or more of male and female tenon connection, screw and nut connection, tongue and groove connection, welding of reserved connecting parts, post-cast concrete connection, and engineering adhesive bonding.

[0010] Based on the above technical solution, the material of the panel, base plate, panel column, base plate column or middle plate is one of reinforced concrete, steel concrete, high-strength mortar plus wire mesh, high-strength mortar plus fiber mesh, steel-wood combination, steel-plastic combination, and engineering plastics.

[0011] On the basis of the above technical solution, additional steel bars are provided at the connection between the panel and the panel column, and additional steel bars are provided at the connection between the bottom plate and the bottom plate column.

[0012] On the basis of the above technical solution, the panel reserved holes penetrate the panel columns; the bottom plate reserved holes penetrate the bottom plate columns.

[0013] On the basis of the above technical solution, the upper surface and / or the lower surface of the middle plate are provided with buckles or slots; or the upper surface and / or the lower surface of the middle plate are fixed with pipelines or conduits.

[0014] On the basis of the above technical solution, the edge sealing board is provided with a raised portion, the shape of the raised portion matches the shape of the cavity enclosed by the panel and the bottom plate, and the thickness of the raised portion is not less than 50 mm.

[0015] On the basis of the above technical solution, the supporting beam is a cast-in-place, prefabricated or laminated steel beam, wooden beam, concrete beam, steel-wood composite beam, reinforced concrete beam or steel-concrete beam.

[0016] On the basis of the above technical solution, a construction process of a prefabricated combined cavity floor comprises the following steps:

[0017] a. Prefabricate the face plate, base plate and middle plate separately;

[0018] b. Set the bottom support of the supporting beam;

[0019] c. Hoist the supporting beam and place it on the column or wall, or set up the supporting beam formwork and tie the steel bars of the supporting beam;

[0020] d. Lift the bottom plate and place it on the supporting beam or the side formwork of the supporting beam, and tie or weld the stress reinforcement of the supporting beam;

[0021] e. Install and fix horizontal pipelines / pipes on the upper and lower surfaces of the bottom plate and / or the middle plate;

[0022] f. Lift and fix the middle plate;

[0023] g. Lift panels, install connectors, install edge banding, and tie or weld the reinforcement bars of supporting beams;

[0024] h. Pre-buried beam-penetrating conduits at the joints of two cavity floor slabs;

[0025] i. Pour concrete at the joints of the supporting beam and the two cavity slabs, and cure to form the concrete.

[0026] Compared with the prior art, the advantages of the present invention are:

[0027] (1) Compared with the rib beam floor, the prefabricated combined cavity floor in the present invention has good use function and high rigidity, and is usually applied to large span and large bay floor. Since the thickness of the floor structure layer can be reduced, the net height of the floor is increased, a good visual effect is achieved, and the ceiling and related costs are saved.

[0028] (2) Compared with cast-in-place hollow floor slabs, the prefabricated combined cavity floor slab in the present invention avoids the problems of manufacturing and transporting the inner mold (cavity component), and has a larger hollow ratio, which reduces the deadweight load of the floor slab, reduces the material consumption, and saves the project cost.

[0029] (3) All floor components of the prefabricated combined cavity floor in the present invention are prefabricated in the factory, and there is no need to set up the bottom plate formwork on the construction site, which greatly improves the assembly rate of the building structure, significantly reduces the project cost and speeds up the construction progress. In addition, it saves energy and protects the environment, reduces pollution and significantly improves efficiency during the production and construction process.

[0030] (4) The presence of the hollow part of the prefabricated combined cavity floor in the present invention can reduce the transfer of noise and heat, and the sound insulation and heat insulation performance is significantly improved.

[0031] (5) The prefabricated combined cavity floor in the present invention mainly transmits force through the arch formed by elliptical holes in two directions, avoiding stress concentration in the hollow part, and the force model is simple and reasonable.

[0032] (6) Compared with all other types of floor slabs, the prefabricated composite cavity floor slab in the present invention has steel bars and concrete that are all manufactured and installed in the prefabrication plant, so there is no need to operate the steel bars and pour and maintain the concrete on site, which ensures the quality of the structure, effectively shortens the construction period of the project, and saves the project cost.

[0033] (7) The installation and maintenance of the prefabricated combined cavity floor duct and various pipelines of the present invention are more convenient. After the base plate assembly is hoisted on site, the duct and pipelines are directly installed on it. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A partial cross-sectional view of a prefabricated combined cavity floor in an embodiment of the present invention;

[0035] Figure 2 is a front view of a cavity floor in an embodiment of the present invention;

[0036] Figure 3 It is a structural schematic diagram of an embodiment of the present invention;

[0037] Figure 4 A partial cross-sectional view of the installation of the edge banding board in an embodiment of the present invention;

[0038] Figure 5 A schematic diagram of the structure of a panel in an embodiment of the present invention;

[0039] Figure 6 Schematic diagram of the structure of the bottom plate in an embodiment of the present invention.

[0040] In the figure: 1-panel, 2-bottom plate, 3-panel column, 4-bottom plate column, 5-connector, 6-bidirectional force reinforcement, 7-prestressed reinforcement, 8-edge sealing plate, 9-support beam, 10-middle plate, 31-panel reserved hole, 41-bottom plate reserved hole. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0042] See also Figure 1 As shown, the embodiment of the present invention provides a prefabricated combined cavity floor, including at least one cavity floor and at least two support beams 9, see Figure 2 and Figure 3 As shown, the cavity floor comprises a panel 1, an intermediate panel 10, a bottom panel 2, a connecting member 5 and at least three edge panels 8. The panel 1, the intermediate panel 10 and the bottom panel 2 are connected in sequence. Figure 4As shown, the edge plate 8 is arranged outside the middle plate 10 and encloses the panel 1, the middle plate 10 and the bottom plate 2 into a whole; the panel 1 and the bottom plate 2 are both provided with bidirectional force-bearing ribs 6 and prestressed ribs 7, which are cast and fixed together with the panel 1 and the bottom plate 2 during the prefabrication stage in the factory. The panel 1 is also provided with at least three panel columns 3, and the bottom plate 2 is provided with at least three bottom plate columns 4, wherein the panel columns 3 and the bottom plate columns 4 are connected one by one through connectors 5.

[0043] See also Figure 5 As shown, the top surface of the panel 1 is flat, the bottom surface is curved, and the thickness of the panel between any two adjacent panel columns 3 is an irregular shape with a thin middle and thick sides; see Figure 6 As shown, the bottom surface of the bottom plate 2 is flat, the top surface is curved, and the thickness between any two adjacent bottom plate columns 4 is an irregular shape with thin in the middle and thick on both sides. In this embodiment, the panel 1 and the bottom plate 2 are symmetrical along the contact surface, so that the cavity floor has an overall up-down conversion property. On the basis of not changing the structural characteristics, it can be divided into the upper and lower surfaces to be used as a floor, and can also be divided into the left and right surfaces according to actual conditions. The present invention is used as a wall or a wall component, and the application of the present invention is diverse.

[0044] The panel column 3 is in the shape of a cylinder, a polygonal column, a stepped shape with a large upper part and a small lower part, an inverted terrace or an inverted cone, and the panel column 3 is provided with a panel reserved hole 31. The bottom plate column 4 is in the shape of a cylinder, a polygonal column, a stepped shape with a small upper part and a large lower part, a terrace or a cone, and the bottom plate column 4 is provided with a bottom plate reserved hole 41. In this embodiment, the panel column 3 and the bottom plate column 4 have the same size and structure, and can be matched and replaced with each other, thereby reducing the occupation of the production line, improving production efficiency, and significantly reducing the difficulty of on-site assembly and connection.

[0045] The base plate 2 and the base plate column 4 are prefabricated as a whole; or the base plate 2 and the base plate column 4 are prefabricated separately and connected by one or more of male and female mortise and tenon connection, screw and nut connection, tongue and groove connection, welding of reserved connecting parts, post-cast concrete connection, and engineering adhesive bonding; the panel 1 and the panel column 3 are prefabricated as a whole; or the panel 1 and the panel column 3 are prefabricated separately and connected by one or more of male and female mortise and tenon connection, screw and nut connection, tongue and groove connection, welding of reserved connecting parts, post-cast concrete connection, and engineering adhesive bonding.

[0046] The material of the panel 1, the bottom plate 2, the panel columns 3, the bottom plate columns 4 or the middle plate 10 is one of reinforced concrete, steel concrete, high-strength mortar plus steel wire mesh, high-strength mortar plus fiber mesh, steel-wood combination, steel-plastic combination, and engineering plastic. The panel 1, the bottom plate 2 and the panel columns 3 and the bottom plate columns 4 are integrally prefabricated on a specific mold in a prefabrication plant.

[0047] Additional steel bars are provided at the connection between the panel 1 and the panel column 3, and additional steel bars are provided at the connection between the bottom plate 2 and the bottom plate column 4. The additional steel bars can significantly improve the bending and shearing resistance of the panel 1 and the panel column 3, and the bottom plate 2 and the bottom plate column 4, and strengthen the structural strength of the connection.

[0048] The panel reserved hole 31 passes through the panel column 3 ; the bottom plate reserved hole 41 passes through the bottom plate column 4 .

[0049] See also Figure 2 As shown, the middle plate 10 is a heat insulation plate, and the upper or / and lower plates of the middle plate 10 are provided with buckles for fixing pipelines / pipes, and these buckles for fixing pipelines / pipes are used to fix the pipelines and pipes of the house, such as hot and cold water pipes, power lines and other functional facilities. The middle plate 10 divides the internal space of a prefabricated combined cavity floor in the embodiment into two parts, the upper part is a cold flow layer, and the lower part is a hot flow layer. In actual application, the upper cold flow layer can absorb heat by using the cold flow of refrigeration, so that the house has a better cooling effect; the lower hot flow layer can be heated by using the hot flow of heating, so that the house has a better warming effect.

[0050] The panel reserved hole 31 passes through the panel column 3; the bottom plate reserved hole 41 passes through the bottom plate column 4. The edge plate 8 is provided with a raised portion, the shape of which matches the shape of the cavity enclosed by the panel 1 and the bottom plate 2, and the thickness of the raised portion is not less than 50 mm. The edge plate 8 fits the shape of the hole at the edge of the cavity floor and bulges inward. The shape of the raised portion is consistent with the shape of the space enclosed by the panel 1 and the bottom plate 2 after splicing, and the depth of the raised portion is not less than 50 mm. The raised portion and the support beam are cast in place as a whole to form a component similar to a corbel after solidification, which can be used as a shear member of the support beam.

[0051] The support beam 9 is a cast-in-place, prefabricated or laminated steel beam, wooden beam, concrete beam, steel-wood composite beam, reinforced concrete beam or steel-concrete beam. The actual number of support beams 9 used to support the cavity floor slab is determined according to the specific project conditions.

[0052] A construction process for a prefabricated combined cavity floor, the construction of which includes the following steps:

[0053] a. Prefabricate the panel 1, the bottom plate 2, and the middle plate 10 respectively;

[0054] b. Setting the bottom support of the support beam 9;

[0055] c. Hoist the support beam 9 and place it on the column or wall, or set up the template of the support beam 9 and tie the steel bars of the support beam 9;

[0056] d. Hoist the bottom plate 2 and place it on the support beam 9 or the side formwork of the support beam 9, then tie or weld the bidirectional force-bearing tendons 6 and prestressed tendons 7 of the bottom plate 2, and tie or weld the force-bearing tendons of the support beam 9;

[0057] e. Install and fix horizontal pipelines / pipes on the upper and lower surfaces of the bottom plate 2 and / or the middle plate 10;

[0058] f. Lift and fix the middle plate 10;

[0059] g. Hoist the panel 1, install the connector 5, install the edge plate 8, tie or weld the bidirectional force-bearing tendons 6 and prestressed tendons 7 of the panel 1, and tie or weld the force-bearing tendons of the support beam 9;

[0060] h. Pre-buried beam-penetrating conduits at the joints of two cavity floor slabs;

[0061] i. Pour concrete at the joints of the support beam 9 and the two cavity slabs, and cure to shape them.

[0062] The prefabricated combined cavity floor in the present invention is prefabricated, the assembly parts are standardized, the production management is convenient, the structure is streamlined, and it is easy to disassemble and transport, which reduces the transportation cost; the prefabricated combined cavity floor in the present invention is easy to construct, can shorten the construction period, and significantly reduce the number of personnel for on-site construction.

[0063] Compared with the rib beam floor, the prefabricated combined cavity floor in the present invention has good use function and high rigidity, and is usually applied to large span and large bay floor. Since the thickness of the floor structure layer can be reduced, the net height of the floor is increased, a good visual effect is achieved, and the ceiling and related costs are saved.

[0064] Compared with the cast-in-place hollow floor, the prefabricated combined cavity floor in the present invention avoids the problems of manufacturing and transporting the inner mold (cavity component), and has a larger hollow ratio, which reduces the deadweight load of the floor, reduces the material consumption, and saves the project cost.

[0065] All floor components of the prefabricated combined cavity floor in the present invention are prefabricated in the factory, and there is no need to set up the bottom plate formwork on the construction site, which greatly improves the assembly rate of the building structure, significantly reduces the project cost and speeds up the construction progress. In addition, it saves energy and protects the environment, reduces pollution and significantly improves efficiency during the production and construction process.

[0066] The presence of the hollow part of the prefabricated combined cavity floor in the present invention can reduce the transfer of noise and heat, and the sound insulation and heat insulation performance is significantly improved.

[0067] The prefabricated combined cavity floor in the present invention mainly transmits force through the arch formed by elliptical holes in two directions, thereby avoiding stress concentration in the hollow part, and the force model is simple and reasonable.

[0068] Compared with all other types of floor coverings, the prefabricated combined cavity floor covering in the present invention has all its steel bars and concrete manufactured and installed in the prefabrication plant, so there is no need to operate the steel bars and pour and maintain the concrete on site, which ensures the quality of the structure, effectively shortens the construction period of the project, and saves the project cost; moreover, the installation and maintenance of the air duct and various pipelines of the floor covering are more convenient. After the hoisting of the bottom plate assembly is completed on site, the air duct and pipelines are directly installed on it.

[0069] Since the construction of prefabricated composite cavity floor is relatively simple, there is no need to set up formwork for the floor, and the workload and number of formwork are much smaller than those of cast-in-place floor. There is no concrete pouring, maintenance and steel processing on site, so the construction speed is faster than that of traditional beam-slab structure and two-way dense rib cavity floor structure.

[0070] The present invention is not limited to the above-mentioned embodiments. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A prefabricated combined cavity floor, characterized in that: The hollow floor comprises at least one cavity floor and at least two supporting beams (9), wherein the cavity floor comprises a panel (1), an intermediate panel (10), a bottom panel (2), a connecting piece (5) and at least three edge sealing plates (8), wherein the panel (1), the intermediate panel (10) and the bottom panel (2) are connected in sequence, and the edge sealing plate (8) is arranged on the outside of the intermediate panel (10) and encloses the panel (1), the intermediate panel (10) and the bottom panel (2) into a whole; the panel (1) and the bottom panel (2) are both provided with bidirectional force reinforcement (6) and prestressed reinforcement (7), the panel (1) is also provided with at least three panel columns (3), and the bottom panel (2) is provided with at least three bottom panel columns (4), wherein the panel columns (3) and the bottom panel columns (4) are connected in a one-to-one correspondence through the connecting piece (5); The top surface of the panel (1) is flat, the bottom surface is curved, and the thickness of the plate between any two adjacent panel columns (3) is an irregular shape with a thin middle and thick sides; the bottom surface of the bottom plate (2) is flat, the top surface is curved, and the thickness of the plate between any two adjacent bottom plate columns (4) is an irregular shape with a thin middle and thick sides; The intermediate plate (10) is a heat insulation plate, and the intermediate plate (10) divides the internal space of the prefabricated combined cavity floor into two parts, the upper part is a cold flow layer, and the lower part is a hot flow layer; The edge sealing plate (8) is provided with a raised portion, the shape of which matches the shape of the cavity enclosed by the panel (1) and the bottom plate (2), and the thickness of the raised portion is not less than 50 mm.

2. The prefabricated combined cavity floor according to claim 1, characterized in that: The panel column (3) is in the shape of a cylinder, a polygonal column, a stepped shape with a large top and a small bottom, an inverted terrace or an inverted cone, and the base plate column (4) is in the shape of a cylinder, a polygonal column, a stepped shape with a small top and a large bottom, a terrace or a cone.

3. The prefabricated combined cavity floor according to claim 1, characterized in that: The panel upright column (3) is provided with a panel reserved hole (31), and the bottom plate upright column (4) is provided with a bottom plate reserved hole (41).

4. The prefabricated combined cavity floor according to claim 1, characterized in that: The base plate (2) and the base plate column (4) are prefabricated as a whole; or the base plate (2) and the base plate column (4) are prefabricated separately and connected by one or more of male and female tenon connection, screw and nut connection, tongue and groove plug-in, welding of reserved connecting parts, post-cast concrete connection, and engineering adhesive bonding; the panel (1) and the panel column (3) are prefabricated as a whole; or the panel (1) and the panel column (3) are prefabricated separately and connected by one or more of male and female tenon connection, screw and nut connection, tongue and groove plug-in, welding of reserved connecting parts, post-cast concrete connection, and engineering adhesive bonding.

5. The prefabricated combined cavity floor according to claim 1, characterized in that: The material of the panel (1), the bottom plate (2), the panel column (3), the bottom plate column (4) or the intermediate plate (10) is one of reinforced concrete, steel concrete, high-strength mortar plus steel wire mesh, high-strength mortar plus fiber mesh, steel-wood combination, steel-plastic combination, and engineering plastics.

6. The prefabricated combined cavity floor according to claim 1, characterized in that: Additional steel bars are provided at the connection between the panel (1) and the panel column (3), and additional steel bars are provided at the connection between the bottom plate (2) and the bottom plate column (4).

7. The prefabricated combined cavity floor as claimed in claim 3, characterized in that: The panel reserved hole (31) passes through the panel column (3); and the bottom plate reserved hole (41) passes through the bottom plate column (4).

8. The prefabricated combined cavity floor as claimed in claim 1, characterized in that: The upper surface or / and the lower surface of the middle plate (10) are provided with buckles or slots; or the upper surface or / and the lower surface of the middle plate (10) are fixed with pipelines or conduits.

9. The prefabricated combined cavity floor according to claim 1, characterized in that: The support beam (9) is a cast-in-place, prefabricated or laminated steel beam, wooden beam, concrete beam, steel-wood composite beam, reinforced concrete beam or steel-concrete beam.

10. The construction process of a prefabricated combined cavity floor as claimed in claim 1, characterized in that: The steps include: a. Prefabricate the panel (1), the bottom plate (2), and the intermediate plate (10) respectively; b. providing a bottom support for the support beam (9); c. hoisting the support beam (9) and placing it on a column or wall, or supporting the support beam (9) template and tying the steel bars of the support beam (9); d. hoisting the base plate (2) and placing it on the support beam (9) or on the side formwork of the support beam (9), tying or welding the stress-bearing reinforcement of the support beam (9); e. Install and fix horizontal pipelines / pipes on the upper and lower surfaces of the bottom plate (2) and / or the intermediate plate (10); f. Lifting and fixing the intermediate plate (10); g. hoisting the panel (1), installing the connector (5), installing the edge banding (8), tying or welding the force-bearing bars of the support beam (9); h. Pre-buried beam-penetrating conduits at the joints of two cavity floor slabs; i. pouring concrete at the joints of the support beam (9) and the two cavity floor slabs, and curing and shaping.

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