CN112031233A - Fabricated floor and manufacturing method thereof - Google Patents
Fabricated floor and manufacturing method thereof Download PDFInfo
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- CN112031233A CN112031233A CN202010694247.3A CN202010694247A CN112031233A CN 112031233 A CN112031233 A CN 112031233A CN 202010694247 A CN202010694247 A CN 202010694247A CN 112031233 A CN112031233 A CN 112031233A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 239000004567 concrete Substances 0.000 claims abstract description 115
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 112
- 239000010959 steel Substances 0.000 claims abstract description 112
- 230000002787 reinforcement Effects 0.000 claims description 17
- 238000005520 cutting process Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 238000009826 distribution Methods 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000005219 brazing Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000000084 colloidal system Substances 0.000 claims description 2
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- 238000010276 construction Methods 0.000 abstract description 34
- 238000009417 prefabrication Methods 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 description 11
- 238000013461 design Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 239000011150 reinforced concrete Substances 0.000 description 4
- 239000004566 building material Substances 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
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- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 1
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- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011381 foam concrete Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
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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
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
- E04B5/04—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/14—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted 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
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
- E04B5/023—Separate connecting devices for prefabricated floor-slabs
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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
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
- E04B5/10—Load-carrying floor structures formed substantially of prefabricated units with metal beams or girders, e.g. with steel 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
- E04C5/01—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 extent, e.g. lattice girders
- E04C5/0627—Three-dimensional reinforcements composed of a prefabricated reinforcing mat combined with reinforcing elements protruding out of the plane of the mat
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Panels For Use In Building Construction (AREA)
Abstract
The invention discloses an assembled floor slab, which comprises a steel bar truss and a light concrete plate, wherein the steel bar truss is used for bearing, and the steel bar truss is embedded in the light concrete plate so as to ensure that the light concrete plate meets the bearing requirement. The invention also discloses a manufacturing method of the fabricated floor slab, which is characterized in that the steel bar truss is accurately fixed and placed in the concrete mould in a mode of inserting and fixing the steel bar truss, so that the purpose of implanting the steel bar truss into the lightweight concrete slab is realized. The invention realizes the complete integral prefabrication of the floor slab on the premise of meeting the bearing performance, the manufactured floor slab has light weight and high strength, the assembly is easy, a steel structure frame does not need to be configured in advance, the construction efficiency is greatly improved, and the construction cost is obviously reduced.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to an assembled floor slab and a manufacturing method thereof.
Background
The fabricated building is a building which is formed by transferring a large amount of field operation work in the traditional construction mode to a factory, processing and manufacturing building components and accessories (such as floor slabs, wall slabs, stairs, balconies and the like) in the factory, transporting the components and accessories to a building construction site, and assembling and installing the components and the accessories on the site in a reliable connection mode. Compared with the traditional building, the fabricated building has the advantages of less cast-in-place operation on site, higher standardization degree, shorter construction period, more accordance with the requirements of green buildings, more energy conservation, environmental protection and the like. In recent years, the development of the assembly type building industry is very important in China, and the building department of 11-14 th of 2015 plans that the assembly type building accounts for more than 20% of the newly-built building in 2020 and more than 50% of the newly-built building in 2025.
The prefabricated building, especially the middle and high-rise prefabricated building, has severer requirements on the bearing performance and the self weight in the selection of the building materials due to the special construction mode, so that novel light building materials such as light aggregate concrete, foam concrete, autoclaved aerated concrete and the like are adopted in a large quantity. At present, the light concrete building material is mainly used for wallboards, and parts such as floor slabs and the like with extremely high requirements on bearing performance are not directly prefabricated by using the material.
At present, the floor slab of the fabricated building adopting concrete mainly adopts the following three building modes.
The first is that the laminated slab is assisted by a cast-in-place mode, and the construction mode is the most widely applied at present. A reinforced concrete slab layer is prefabricated, and a reinforced skeleton is embedded in the slab layer and protrudes out of the slab layer. During construction, a reinforced concrete slab layer is hoisted and assembled, then a layer of reinforcing mesh is fixedly laid on the top of the embedded reinforcing cage, and finally concrete is poured onto the prefabricated reinforced concrete slab layer in a cast-in-place mode to be uniformly paved over the reinforcing cage and the reinforcing mesh. And finishing the construction of the whole floor slab after the concrete is cured.
The second is a construction mode in which the composite slab is supplemented with a lightweight concrete slab. For example, chinese patent publication No. CN210562904U entitled composite floor based on unidirectional longitudinal rib structure discloses a floor form of composite slab with light concrete slab as its core, which is a cast-in-place layer of the first construction method replaced by light concrete slab. For another example, the patent publication No. CN209114686U entitled composite floor slab of autoclaved lightweight concrete slab discloses another floor slab form of composite slab with lightweight concrete slab as its core, which is characterized by that two layers of lightweight concrete slabs are inserted into each other, the bottom layer is used as composite slab, the top layer is perforated to accommodate steel bar skeleton, and finally, a small amount of cast-in-situ operation is used to fill the pores to complete the construction of floor slab.
The third type is a construction method in which a steel frame is used as a main load-bearing structure, and a lightweight concrete slab is laid in the frame. For example, the Chinese patent with publication number CN210263566U and the name of the invention of an autoclaved aerated concrete composite floor slab discloses that a steel structure frame is used as a main bearing structure body, a light concrete slab is paved in the frame, the core of the invention is that I-shaped steel is used for constructing the bearing frame, the light concrete slab is paved between the I-shaped steel by utilizing a connecting component which is arranged in the light concrete slab in advance, and the construction of the floor slab is completed.
However, the above-mentioned construction methods of floor slabs have certain disadvantages. The first mode requires a large amount of cast-in-place work and is low in overall assembly degree. The second method also needs to carry out certain cast-in-place operation, and meanwhile, the assembling process is complex and the construction difficulty is high. The third mode needs a large amount of I-steel, so that the overall steel consumption is large and the cost is high.
Disclosure of Invention
Aiming at least one technical problem in the prior art, the invention provides the fabricated floor slab and the manufacturing method thereof, on the premise of meeting the bearing performance, the complete integral prefabrication of the floor slab is realized, the fabricated floor slab is light in weight, high in strength and easy to assemble, a steel structure frame is not required to be configured in advance, the construction efficiency is greatly improved, and the construction cost is obviously reduced.
The technical scheme for solving the technical problems is as follows: an assembled floor slab comprises a steel bar truss and a lightweight concrete plate, wherein the steel bar truss is used for bearing, and the steel bar truss is buried in the lightweight concrete plate so as to ensure that the lightweight concrete plate meets the bearing requirement.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the lightweight concrete plate is an autoclaved aerated concrete plate.
Further, a connecting member for splicing is arranged on the lightweight concrete plate.
Preferably, the connecting member is a mortise and tenon joint member or a connecting member embedded in the lightweight concrete plate.
Preferably, the connecting members are tenon-and-mortise members, and the tenon-and-mortise members comprise grooves and flanges which are arranged on two sides of the lightweight concrete plate and matched with each other.
Further, the steel bar truss includes a main bar arranged along a longitudinal direction of the lightweight concrete panel.
Preferably, the steel bar truss further comprises auxiliary bars arranged between the main bars.
Preferably, the steel bar truss is a single-piece steel bar truss or a triangular steel bar truss consisting of upper and lower chord member main reinforcements and web member auxiliary reinforcements.
Preferably, the steel bar truss further comprises a transverse distribution rib which fixedly connects the plurality of main ribs to form a net structure.
Preferably, the steel bar truss comprises a single steel bar truss or a triangular steel bar truss which is composed of upper and lower chord rod main reinforcements and web member auxiliary reinforcements, and the steel bar truss is a three-dimensional steel bar frame which is formed after a plurality of steel bar meshes are connected by transverse distribution reinforcements.
Furthermore, the floor slab also comprises a connecting piece which is embedded in the lightweight concrete slab and used for assembling the floor slab.
Preferably, the connecting piece is a bolt sleeve.
Preferably, the connecting pieces are fixedly connected to two ends of the steel bar truss.
The invention also designs a manufacturing method of the fabricated floor slab, which comprises the following steps:
step S1, preparing a steel bar truss;
step S2, the raw materials of the lightweight concrete board are fed according to the raw material proportion to prepare concrete mixed pug;
step S3, the steel bar trusses prepared in the step S1 are stacked and arranged in a concrete mould at intervals in a mode of fixing through inserted brazing filler metal;
step S4, pouring the pug prepared in the step S2 into the concrete mold in the step S3, compacting and molding, and then, drawing out the drill steel and demolding to prepare a light concrete rough blank;
step S5, cutting the light concrete rough blank prepared in the step S4 according to the size requirement of the floor slab to prepare a floor slab rough blank;
and step S6, performing subsequent hardening treatment on the rough floor slab prepared in the step S5 to prepare the fabricated floor slab.
Further, in step S1, when the steel bar truss is prepared, the connecting member and/or the pre-buried connecting member needs to be welded to the steel bar truss, the connecting member is a bolt sleeve, and after welding, the assembling hole of the connecting member needs to be filled with a soft colloid material to block the hole.
Further, in step S5, when the lightweight concrete rough blank is cut, the cutting and shaping of the mortise and tenon component for floor slab splicing are also completed.
The invention has the following beneficial effects:
1) the invention effectively achieves the purpose of directly manufacturing the precast floor slab by using the lightweight concrete material, effectively reduces the weight of the floor slab, and the weight of the single cube of the existing concrete floor slab can reach more than 2.5 tons, while the weight of the single cube can be reduced by more than half at least by adopting the floor slab of the invention.
2) The floor slab can be directly hoisted and assembled without cast-in-place, the cast-in-place quantity of construction is greatly reduced, wet operation in construction is effectively reduced, the construction difficulty and the labor intensity of construction are greatly reduced, and the overall construction cost is also lower.
3) The size of the floor slab can be flexibly controlled, and the integral transportation and hoisting are convenient.
4) The invention can exert the advantages of the existing lightweight concrete material, and can realize that the whole fabricated building adopts the lightweight concrete material, so that the whole building is greatly improved in various performances such as fire resistance, earthquake resistance, sound insulation, heat insulation and the like.
5) The invention is very beneficial to large-scale production, and by adopting the structure and the preparation method of the invention, the large-scale reconstruction of the existing production line is not needed, thus greatly reducing the production cost.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of another embodiment of the present invention;
fig. 3 is a schematic structural view of a steel bar truss according to the present invention;
fig. 4 is a schematic structural view of a steel bar truss according to another structure of the present invention;
fig. 5 is a schematic structural view of a steel bar truss according to a third structure of the present invention;
figure 6 is an assembly view of a floor slab of the present invention;
FIG. 7 is a schematic view of the assembled structure of the floor slab of the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1. the lightweight concrete slab comprises a lightweight concrete slab 2, a steel bar truss 2a, upper and lower chord rod main ribs 2b, web member auxiliary ribs 2c, transverse distribution ribs 3, flanges 4, grooves 5, connecting pieces 6, reinforcing bolts 7 and beams.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1 and 2, the fabricated floor designed by the invention comprises a steel bar truss 2 for bearing and a lightweight concrete plate 1, wherein the steel bar truss 2 is embedded in the lightweight concrete plate 1 to ensure that the lightweight concrete plate 1 meets the bearing requirement of the floor.
The light concrete plate 1 of the fabricated floor slab of the invention is preferably an autoclaved aerated concrete plate.
At present, the floor slabs of the prefabricated buildings mainly adopt cast-in-place concrete slabs, a small number of the floor slabs of the prefabricated buildings adopt a steel structure frame as a main body, and small-sized lightweight concrete slabs are paved in gaps. The main reason is that the bearing performance of the lightweight concrete slab is insufficient, so that the bearing requirement of the floor slab is difficult to meet. Taking a common residential floor as an example, the bearing performance of the floor needs to reach more than 200kg per square meter, and the bearing capacity of 300 or even more than 500kg per square meter is needed for special buildings such as factory buildings. The building has corresponding standards for the thickness of the floor slab, and the existing lightweight concrete slab cannot meet the bearing requirements under the limitation of the thickness of the floor slab.
Secondly, the lightweight concrete slab generally needs to be produced in a factory and in a large scale under the condition of an assembly type building, a series of processing steps such as cutting and maintenance are involved in the production process, the steel bar truss 2 with a complex structure is difficult to embed in the floor slab in advance, generally, only some straight bars can be inserted to enhance the bearing performance, and the bearing performance is difficult to further promote. Therefore, the existing lightweight concrete slab can only be used as a part with a slightly lower requirement on the bearing performance, such as a wallboard, and cannot be used as a floor slab.
Especially for autoclaved aerated concrete slabs, although the autoclaved aerated concrete slabs are light in weight, the autoclaved aerated concrete slabs are excellent in fireproof performance and have good anti-seismic performance. However, the load-bearing performance of the concrete is poor in the current lightweight concrete, so that the concrete cannot be used as a floor slab at all. In addition, in the manufacturing process of the autoclaved aerated concrete, the links of blank making, cutting, autoclaved aeration and the like are required, the difficulty in prefabricating the reinforcing steel bars is very high, and the requirement of batch production is difficult to meet. And different buildings, such as houses, factories, warehouses and the like, have different requirements on the bearing performance and different configurations of the reinforcing steel bars, thereby further increasing the production difficulty. Therefore, at present, reinforcement of steel bars in autoclaved aerated concrete slabs cannot be realized.
The invention firstly carries out corresponding reinforcement design aiming at the bearing performance requirements of different buildings, and respectively designs common upper and lower reinforcements, a single-piece steel bar truss, a triangular steel bar truss and the like so as to correspond to the buildings with different bearing requirements. Secondly, the invention carries out the design of corresponding processing links in the production link so as to ensure that the steel bar truss 2 can be accurately implanted into the lightweight concrete slab 1, ensure the accuracy of the implantation position, simultaneously do not influence the subsequent processing such as cutting and the like, and skillfully solve the series of problems. And the whole improvement does not greatly reform the production line and does not increase the operation difficulty in the production process, so that the assembled floor slab can be produced in large batch by adopting the existing production mode.
Specifically, the manufacturing method of the fabricated floor slab of the invention comprises the following steps:
step S1, preparing a steel bar truss 2;
step S2, the raw materials of the lightweight concrete board 1 are fed according to the raw material proportion to prepare concrete mixed pug;
step S3, the steel bar trusses 2 prepared in the step S1 are stacked and arranged in a concrete mould at intervals in a mode of fixing through inserted brazing filler metal;
step S4, pouring the pug prepared in the step S2 into the concrete mold in the step S3, compacting and molding, and then, drawing out the drill steel and demolding to prepare a light concrete rough blank;
step S5, cutting the light concrete rough blank prepared in the step S4 according to the size requirement of the floor slab to prepare a floor slab rough blank;
and step S6, carrying out subsequent treatment on the rough floor slab prepared in the step S5 to prepare the fabricated floor slab.
Most process steps of the preparation method are basically the same as those of the existing lightweight concrete production process, and the difference is mainly in the steps S1 and S3. First, the corresponding steel bar trusses 2 are configured according to the corresponding building type. Then, aiming at the arrangement of cutting equipment used in the cutting link of the subsequent production, the steel bar trusses 2 are stacked at intervals in the concrete mould. When stacking, the steel bar truss 2 can be fixed and positioned in a mode of inserting a drill rod. Specifically, a drill rod inserting hole can be formed in the mold, then the fixing drill rod is inserted into the mold through the drill rod inserting hole, and the steel bar truss 2 can be accurately fixed in the mold through the fixing drill rod. After the pug is poured, the fixing drill rod is only required to be taken out, and the implantation of the steel bar truss 2 is completed. The production mode can effectively realize that the steel bar truss 2 with a complex structure is accurately implanted into the lightweight concrete slab 1, so that the lightweight concrete slab forms an integrated high-strength plate, and the requirement of high bearing performance of a floor slab is met.
The technical solution of the present invention is described in further detail below by way of examples of the present invention.
Example 1
As shown in fig. 2, the fabricated floor of the present embodiment includes a steel bar truss 2 for load bearing and a lightweight concrete panel 1, and the steel bar truss 2 is buried in the lightweight concrete panel 1.
The floor slab of this embodiment is also provided with connecting members for splicing. The connecting member of the present embodiment is a mortise and tenon joint member, and the mortise and tenon joint member includes grooves 4 and flanges 3 which are arranged at both sides of the lightweight concrete panel 1 and are matched with each other. For the invention, all the structural forms of more than three hundred tenon-and-mortise structures in the prior art can be applied to the invention.
This embodiment can be manufactured by the manufacturing method of the present invention as described above. Only a slight modification to step S5 is required. In step S5, when the rough lightweight concrete blank is cut, the cutting and shaping of the mortise and tenon component for floor slab splicing are also completed.
The embodiment can also be improved by adopting the following measures that the spliced connecting elements can also adopt metal embedded parts, and are directly welded on the steel bar truss 2 during production and processing so as to be directly prefabricated in the lightweight concrete plate 1. For example, a plurality of insertion steel bars can be matched with the insertion sleeve, or a metal buckle can be matched with a corresponding metal hook, and the like.
The design of this embodiment is mainly considered the convenience of assembled building assembly. After the connecting members are arranged, the floor slabs can be assembled very conveniently, can be assembled after being hoisted on a construction site according to needs, can also be assembled in a factory in advance, and then are transported to the construction site to be directly hoisted, so that the floor slabs are very convenient and fast.
At present, the most widely applied composite floor slab is generally formed by casting a bottom plate in situ in a factory, then transported to a construction site for hoisting, cast-in-situ on the upper part, and finally constructed. Because the weight of ordinary concrete is heavier, the weight of a single cube plus reinforcing bars is up to 2.6 tons, and a large plate is generally required to be prefabricated on a laminated floor slab, or a whole floor slab is directly prefabricated, the whole weight is extremely heavy, and the transportation and the hoisting are very inconvenient. The floor of this embodiment compares with present coincide floor in aspects such as whole weight, transportation and the assembly degree of difficulty, whole construction cost, self fire behavior, sound insulation performance, heat-proof quality, all has huge advantage.
Example 2
The fabricated floor of the present embodiment includes a steel bar truss 2 for load bearing and a lightweight concrete panel 1, and the steel bar truss 2 is buried in the lightweight concrete panel 1. The lightweight concrete plate 1 is an autoclaved aerated concrete plate.
As shown in fig. 3 to 5, the steel bar truss 2 of the present embodiment may take various structural forms.
Firstly, for the floor slab with lower bearing performance requirement (such as the floor slab of the 1 st floor), a plurality of straight steel bars can be directly adopted and configured to be used as the steel bar trusses.
Secondly, for the middle and low-rise residence, the floor slab has certain requirements on the bearing performance, and a steel bar truss 2 with a reinforced structure can be adopted. As shown in fig. 3, the steel bar truss 2 includes upper and lower chord main reinforcements 2a arranged longitudinally, and also includes web auxiliary reinforcements 2b arranged between the upper and lower chord main reinforcements 2 a. The steel bar truss 2 is designed into a single-piece steel bar truss consisting of upper and lower chord rod main reinforcements 2a and web member auxiliary reinforcements 2 b.
As shown in fig. 4, if a certain load-bearing performance is required to be improved, the steel bar truss 2 may be designed into a triangular steel bar truss consisting of upper and lower chord member main bars 2a and web member auxiliary bars 2 b.
And finally, for buildings such as middle-high-rise houses, plants and the like, the requirement on the bearing performance of the floor slab is higher, and the steel bar truss 2 for further strengthening the structure can be adopted. Such construction may also consider appropriately increasing the thickness of the lightweight concrete panel 1 to further improve the load bearing performance. As shown in fig. 5, the steel bar truss 2 of this type of floor slab arrangement further includes a transverse distribution rib 2 c. The steel bar truss 2 comprises a single steel bar truss or a triangular steel bar truss which is composed of upper and lower chord rod main ribs 2a and web member auxiliary ribs 2b, and the steel bar truss 2 can be designed into a three-dimensional steel bar frame which is formed by connecting a plurality of steel bar trusses through transverse distribution ribs 2 c.
The manufacturing method of this embodiment may be the manufacturing method described above, and in step S6, the subsequent treatment on the slab is an autoclave treatment, which may use the same autoclave method and parameters as the existing autoclaved aerated concrete slab production process.
The present embodiment may also have the following improvement, and the present embodiment may configure the same connecting member as that in embodiment 1 for splicing floor slabs.
The design of this embodiment mainly considers the excellent fire behavior and the sound insulation performance of autoclaved aerated concrete slab, and secondly also considers the excellent anti-seismic performance and the lightweight property of autoclaved aerated concrete slab. Fire prevention is the key point for the fabricated building, and the existing fabricated building has poor fire resistance due to the adoption of a common reinforced concrete cast-in-place floor slab or a steel structure bearing frame, and can only marginally meet the lowest fire prevention requirement of a common house. The floor slab of the embodiment completely adopts the autoclaved aerated concrete slab, the steel bar truss 2 is directly embedded in the autoclaved aerated concrete slab, and the fireproof grade of the floor slab can be improved by more than two grades compared with the existing laminated floor slab by utilizing the excellent fireproof performance of the autoclaved aerated concrete slab.
Meanwhile, the self weight of the floor slab can be controlled to be about 700kg of a single cube, compared with the self weight of the existing composite floor slab with the single cube of more than 2.6 tons, the weight is reduced by nearly 3/4, and the composite floor slab is obviously superior to the existing composite floor slab in aspects of transportation, hoisting, integral anti-seismic performance and the like.
Compared with the floor slab with the existing steel structure frame, the fireproof grade of the floor slab is improved by at least two grades, the integral steel consumption is reduced by at least 2/3, and the integral manufacturing cost is greatly reduced. Simultaneously, compare with current steel construction frame's floor, the connection point position of floor obviously reduces, has greatly reduced connection construction's construction volume, and construction cycle, intensity of labour and constructor quantity can both be reduced by a wide margin.
Example 3
The fabricated floor of the present embodiment includes a steel bar truss 2 for load bearing and a lightweight concrete panel 1, and the steel bar truss 2 is buried in the lightweight concrete panel 1. The lightweight concrete plate 1 is an autoclaved aerated concrete plate.
The steel bar truss 2 of the present embodiment adopts the three-dimensional steel bar truss structure of embodiment 2.
The present embodiment is provided with connectors 5 for convenient connection of the floor slab to the beams 7 of the building.
As shown in fig. 6 and 7, the connecting member 5 of the present embodiment employs a plurality of bolt sleeves, and a steel plate may be disposed on the top and bottom of the bolt sleeves to connect the bolt sleeves into a whole. The use of this construction also facilitates the prefabrication of the bolt sleeves into the lightweight concrete panels 1. By adopting the structure, the steel plates at the top and the bottom can be utilized to weld and fix the bolt sleeves at the two ends of the steel bar truss 2, so that the embedding of the bolt sleeves is completed.
This embodiment can also be manufactured using the manufacturing method described above. It is considered that when the autoclaved aerated concrete slab is manufactured, the mud is prevented from blocking bolt holes when the mud is poured. Therefore, it is necessary to fill the corresponding material plugging hole in the fitting hole of the bolt sleeve in advance. It is preferable to use a readily removable material such as foam as the pore-blocking material.
The design of this embodiment mainly considers the hoisting assembly of the floor slab, i.e. the assembly between the floor slab and the beam 7 of the building. As shown in fig. 6 and 7, since the fabricated building generally uses i-beams as the beams 7, the fabrication of the present embodiment may be performed in the following manner. Firstly, holes are punched on the beam 7 according to the positions of the bolt sleeves, and waist circular holes can be punched to adapt to the assembly requirements in order to reserve assembly gaps. And then removing the hole plugging material in the bolt sleeve of the floor slab, and hoisting the floor slab to the position of the beam 7. And finally, the floor slab and the beam 7 are anchored and fixed by adopting the high-strength bolt 6, and the assembly of the floor slab is completed.
The present embodiment may have the following modifications. The difficult problem of being difficult to connect the assembly between the structure post of present floor and building can be solved to this embodiment. With the present embodiment, the floor slab of the corresponding size can be customized according to the position of the structural columns. And then installing angle steel as a connecting carrier at the connecting position of the structural column, which is required to be connected with the floor slab. Finally, the floor can be connected to the columns in the same way as the beams 7.
In addition, the connecting member 5 of the present embodiment may also adopt other structural forms, such as an assembly mode of opening the beam 7 by snap-fitting, or an assembly mode of welding and fixing the prefabricated connecting steel bars and the beam 7.
With this embodiment, the floor can be mounted on the beam 7, as well as in the middle of the beam. Thus, the formation of a fall between the floor slab and the beam can be avoided, and the attractiveness is not affected.
The design of this embodiment has solved the difficult point of current assembled building, floor assembly completely. The construction of the fabricated building floor can be basically realized without cast-in-place. Compare with current assembly type building floor, the construction degree of difficulty and efficiency can obtain very big promotion.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (16)
1. An assembled floor, its characterized in that: the floor comprises a steel bar truss (2) and a lightweight concrete plate (1) which are used for bearing, wherein the steel bar truss (2) is buried in the lightweight concrete plate (1) so as to ensure that the lightweight concrete plate (1) meets the bearing requirement.
2. The fabricated floor of claim 1, wherein: the lightweight concrete plate (1) is an autoclaved aerated concrete plate.
3. The fabricated floor of claim 1, wherein: the lightweight concrete plate (1) is provided with a connecting member for splicing.
4. A fabricated floor as claimed in claim 3, wherein: the connecting member is a mortise and tenon joint member or a connecting member embedded in the lightweight concrete plate.
5. An assembled floor slab as claimed in claim 4, wherein: the connecting component is a mortise and tenon component, and the mortise and tenon component comprises grooves (4) and flanges (3) which are arranged on two sides of the lightweight concrete plate (1) and matched with each other.
6. A fabricated floor as claimed in claim 1, wherein: the steel bar truss (2) comprises upper and lower chord main reinforcements (2a) which are longitudinally arranged along the lightweight concrete slab (1).
7. An assembled floor slab as claimed in claim 6, wherein: the steel bar truss (2) further comprises web member auxiliary bars (2b) arranged between the upper chord member main bars (2a) and the lower chord member main bars (2 a).
8. An assembled floor as claimed in claim 7, wherein: the steel bar truss (2) is a single-piece steel bar truss or a triangular steel bar truss which is composed of upper and lower chord rod main reinforcements (2a) and web member auxiliary reinforcements (2 b).
9. An assembled floor as claimed in claim 7, wherein: the steel bar truss (2) also comprises transverse distribution ribs (2c) which are used for fixedly connecting the upper and lower chord main ribs (2a) and forming a net structure.
10. A fabricated floor as claimed in claim 9, wherein: steel bar truss (2) include single-piece steel bar truss or the triangular truss of constituteing by last chord member owner muscle (2a) and web member auxiliary reinforcement (2b), steel bar truss (2) are for being connected the three-dimensional reinforcing bar frame that constitutes after a plurality of steel bar trusses by distribution muscle (2 c).
11. A fabricated floor as claimed in claim 1, wherein: the floor slab also comprises a connecting piece (5) which is pre-embedded in the lightweight concrete slab (1) and used for assembling the floor slab.
12. A fabricated floor as claimed in claim 11, wherein: the connecting piece (5) is a bolt sleeve.
13. A fabricated floor as claimed in claim 12, wherein: and the connecting pieces (5) are welded and fixed at two ends of the steel bar truss (2).
14. A method of manufacturing a fabricated floor according to claims 1 to 13, comprising the steps of:
step S1, preparing a steel bar truss (2);
step S2, the raw materials of the lightweight concrete board (1) are fed according to the raw material proportion to prepare concrete mixed pug;
step S3, the steel bar trusses (2) prepared in the step S1 are stacked and arranged in a concrete mould at intervals in a mode of fixing through inserted brazing filler metal;
step S4, pouring the pug prepared in the step S2 into the concrete mold in the step S3, compacting and molding, and then, drawing out the drill steel and demolding to prepare a light concrete rough blank;
step S5, cutting the light concrete rough blank prepared in the step S4 according to the size requirement of the floor slab to prepare a floor slab rough blank;
and step S6, carrying out subsequent treatment on the rough floor slab prepared in the step S5 to prepare the fabricated floor slab.
15. The method of manufacturing an assembled floor slab as claimed in claim 12, wherein: in the step S1, when the steel bar truss (2) is prepared, the connecting member (5) and/or the pre-buried connecting member needs to be welded to the steel bar truss (2), the connecting member (5) is a bolt sleeve, and after welding, the assembling hole of the connecting member (5) needs to be filled with a soft colloid material to block the hole.
16. The method of manufacturing an assembled floor slab as claimed in claim 12, wherein: in step S5, when the lightweight concrete rough blank is cut, the cutting and shaping of the connecting member for floor slab splicing are also completed.
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| CN202010694247.3A CN112031233A (en) | 2020-07-17 | 2020-07-17 | Fabricated floor and manufacturing method thereof |
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| CN202010694247.3A CN112031233A (en) | 2020-07-17 | 2020-07-17 | Fabricated floor and manufacturing method thereof |
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| CN112757454A (en) * | 2020-12-29 | 2021-05-07 | 浙江煤科清洁能源有限公司 | High-strength reinforced steel bar plate and manufacturing mold thereof |
| FI131298B1 (en) * | 2021-12-16 | 2025-01-30 | Jarno Matti Ahonen | Base floor or intermediate floor structure and method for manufacturing thereof |
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Application publication date: 20201204 |