CN111749383A - Novel prefabricated slab - Google Patents
Novel prefabricated slab Download PDFInfo
- Publication number
- CN111749383A CN111749383A CN202010682779.5A CN202010682779A CN111749383A CN 111749383 A CN111749383 A CN 111749383A CN 202010682779 A CN202010682779 A CN 202010682779A CN 111749383 A CN111749383 A CN 111749383A
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- CN
- China
- Prior art keywords
- bottom plate
- prefabricated
- prefabricated bottom
- reinforcing rib
- truss
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
- E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
- E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/06—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres reinforced
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Panels For Use In Building Construction (AREA)
Abstract
The invention discloses a novel prefabricated slab, which comprises a prefabricated bottom plate, wherein a supporting net is arranged in the prefabricated bottom plate, the supporting net is formed by cross fixing of a first supporting piece and a second supporting piece, the upper surface of the prefabricated bottom plate is provided with a plurality of truss shear keys embedded in the prefabricated bottom plate, and each truss shear key comprises two first reinforcing ribs arranged in the prefabricated bottom plate, a second reinforcing rib arranged at the upper end of the prefabricated bottom plate and a third reinforcing rib which is fixed with the first reinforcing rib and extends downwards after being fixed with the second reinforcing rib. The special structure of the truss shear key enables the whole prefabricated slab to have strong shear resistance, and meanwhile, the prefabricated slab is formed by steel bar truss sections processed by an automatic steel bar truss production line during specific implementation, the length is only 1-2 sections, so that the using amount of the steel bar truss is greatly reduced, the requirement of the shear resistance of a basic upper and lower laminated surface is maintained, and the advantage of small steel consumption and good economical efficiency of the prefabricated prestressed plate is also maintained.
Description
Technical Field
The invention relates to the field of constructional engineering fabricated concrete buildings, in particular to a novel prefabricated slab.
Background
The prestressed concrete composite slab is a floor slab system with good economy and suitable for prefabricated concrete buildings, and consists of a lower prefabricated prestressed concrete slab and an upper cast-in-place concrete composite layer, prestressed steel wires are arranged in the lower slab of the prefabricated prestressed concrete slab and prestressed by a pretensioning method, the prefabricated slab has good crack resistance, can solve the problem of cracks in the transportation and installation processes, and the economic index of the prestressed concrete composite slab is obviously superior to that of a steel bar truss composite slab widely applied in the prior art due to the adoption of high-strength prestressed steel wires and the application of the prestress, and can also be used as a composite floor slab with larger span.
However, the application of prestressed concrete composite slabs has been questioned, and mainly, when the precast prestressed concrete slabs are produced on a pre-tensioning method pedestal in a factory, the surfaces of the precast concrete slabs are always natural rough surfaces, that is, after the precast concrete slabs are compacted by a vibrator or a die table, the upper surfaces are not flattened and polished manually, but are subjected to simple manual or mechanical brushing treatment. Although the surface treatment mode can increase the binding force of the concrete on the upper layer and the lower layer of the laminated slab, the surface treatment mode has no clear quantitative index, is greatly influenced by human factors such as worker operation, responsibility and the like, has high requirement on sufficient wetting of the laminated surface by field construction, and is difficult to control the construction quality. In addition, the inclined lower part of the inclined plane of the two side edges of the existing precast prestressed concrete slab inclines towards the middle part of the slab, after installation, wedge-shaped abutted seams with small upper parts and large lower parts are formed between the adjacent precast prestressed concrete slabs, and the seam filling quality is not easy to ensure. To this end, we propose a new prefabricated panel.
Disclosure of Invention
The main object of the present invention is to provide a novel prefabricated panel, which can effectively solve the problems of the background art.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a novel prefabricated plate, includes prefabricated bottom plate, be arranged with the supporting network in the prefabricated bottom plate, the supporting network comprises first support piece and second support piece cross fixation, prefabricated bottom plate upper surface is equipped with a plurality of truss shear keys of embedding in prefabricated bottom plate, truss shear key is including setting up two first strengthening ribs in prefabricated bottom plate, setting at the second strengthening rib of prefabricated bottom plate upper end and with the fixed back downwardly extending of second strengthening rib with the fixed third strengthening rib of first strengthening rib.
Further, the first supporting member is a steel wire, and the second supporting member is made of a steel bar.
Further, the first reinforcing rib, the second reinforcing rib and the third reinforcing rib are all made of short steel bars.
Further, first strengthening rib and second strengthening rib parallel arrangement just are straight reinforcing bar, the third strengthening rib is whole to be V font and both ends are equipped with the bent angle.
Furthermore, the side edges of two ends of the prefabricated bottom plate are inclined.
Furthermore, the included angle alpha between the side edges at the two ends of the prefabricated bottom plate and the horizontal plane is 45-60 degrees.
Compared with the prior art, the invention has the following beneficial effects:
the construction method has the advantages that the truss shear keys are distributed in the prefabricated bottom plate in a certain number, so that the binding capacity of the upper surface of the prefabricated plate and a superposed cast-in-place concrete layer is enhanced, and the concrete is conveniently poured after the plate surface is properly wetted in a construction site;
the special structure of the truss shear key enables the whole precast slab to have strong shear resistance, the bottom of the precast slab is provided with the first reinforcing ribs arranged in parallel, the upper part of the precast slab takes the second reinforcing rib as the center, and the third reinforcing rib is led out from the inclined surface, so that the shear key has good stability, strong toughness and strong shear resistance, meanwhile, the structure is easy to realize, the structure can be prepared in advance when the shear key is produced, then the precast slab is formed by cutting sections of a steel bar truss processed by an automatic steel bar truss production line, the length is only 1-2 sections, the using amount of the steel bar truss is greatly reduced, the requirement of the shear resistance of the basic upper and lower laminated combined surface is maintained, and the advantage of small steel consumption and good economical efficiency of the precast prestressed slab is also maintained;
and thirdly, the plate edges at the two longitudinal sides of the prefabricated prestressed plate are changed into inclined planes with the upper parts inclined towards the middle part of the plate surface, the spliced seam formed by connecting the two plates is formed into a V shape when the prefabricated prestressed plate is installed on a construction site, and the spliced seam is filled when a concrete surface layer is superposed and poured, so that the improvement of the crack resistance of the spliced seam is facilitated.
Drawings
FIG. 1 is a perspective view of a prefabricated panel according to the present invention;
FIG. 2 is a schematic structural diagram of a precast slab truss shear key according to the present invention;
FIG. 3 is a side view of the prefabricated panel of the present invention;
FIG. 4 is a side view of the prefabricated panel splicing structure of the present invention.
In the figure: 1. prefabricating a bottom plate; 2. truss shear keys; 3. a first reinforcing rib; 4. a second reinforcing rib; 5. a third reinforcing rib; 6. a first support member; 7. a second support member; 8. v-shaped splicing; 9. and pouring superposed layer concrete.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1-4, a novel prefabricated slab comprises a prefabricated bottom plate 1, wherein the side edges of two ends of the prefabricated bottom plate 1 are inclined, the included angle α between the side edges of two ends of the prefabricated bottom plate 1 and the horizontal plane is 45 °, a supporting net is arranged in the prefabricated bottom plate 1 and is made by cross-fixing longitudinal steel wires and transverse steel bars, the upper surface of the prefabricated bottom plate 1 is provided with a plurality of truss shear keys 2 embedded in the prefabricated bottom plate 1, each truss shear key 2 comprises two first reinforcing ribs 3 arranged in the prefabricated bottom plate 1, a second reinforcing rib 4 arranged at the upper end of the prefabricated bottom plate 1, a third reinforcing rib 5 fixed with the first reinforcing rib 3 and extending downwards after being fixed with the second reinforcing rib 4, the first reinforcing ribs 3, the second reinforcing rib 4 and the third reinforcing rib 5 are both made of short reinforcing steel bars, the first reinforcing rib 3 and the second reinforcing rib 4 are arranged in parallel and are both made of straight reinforcing steel bars, and the third reinforcing rib 5 is integrally V-shaped and provided with bent angles at two ends;
the concrete structural distribution mode of the prefabricated slab is that the span of the prefabricated bottom plate 1 is 3000-6000 mm, the thickness of the prefabricated bottom plate is 40-70 mm, the maximum width of the prefabricated bottom plate is 2500mm, the concrete grade is C40, the lower part of the prefabricated bottom plate is provided with longitudinal steel wires with the diameter of 5mm and HRB400 transverse steel bars with the diameter of 6mm, the number of the steel wires 5 is determined according to calculation and is not less than 5-6 steel wires/meter, the thickness of the protective layer is 20-27.5 mm, and the surface of the prefabricated bottom plate 1 is determined to adopt manual treatment, mechanical brushing treatment or natural rough surface according to the fire; the truss shear keys 2 are spaced by about 200mm, are formed by common steel bar truss sections produced by mechanical automation, are arranged in 4 rows along the plate span direction, are arranged in 2 rows along the plate width direction, and can be properly increased or decreased according to the plate span and the plate width according to the design requirements.
The novel prefabricated slab has the working principle that the prefabricated slab is transported to a construction site, one ends with inclined planes are arranged adjacently and sequentially, V-shaped abutted seams 8 with large upper parts and small lower parts are formed between the adjacent prefabricated bottom plates 1, when the gaps of the V-shaped abutted seams 8 are large, foaming agents can be used for filling the gaps, then laminated surface layer reinforcing steel bars are bound, cast-in-place laminated layer concrete 9 forms a whole, the thickness of the cast-in-place reinforced concrete laminated layer 9 is 50-130 mm, and the concrete grade is C30.
The production process flow of the precast slab comprises the following steps: cleaning a mold table → painting a release agent → laying and tensioning prestressed wires → binding transverse steel bars → installing end templates and side templates → pouring concrete by a distributor → vibrating → napping → covering and maintaining → dismantling end molds and side molds, lifting and transporting a mold → product detection → finished product protection and shipment.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A novel prefabricated plate is characterized in that: including prefabricated bottom plate (1), the supporting network has been arranged in prefabricated bottom plate (1), the supporting network comprises first support piece (6) and second support piece (7) cross fixation, prefabricated bottom plate (1) upper surface is equipped with a plurality of truss shear keys (2) of embedding in prefabricated bottom plate (1), truss shear key (2) are including setting up two first strengthening ribs (3) in prefabricated bottom plate (1), setting up second strengthening rib (4) in prefabricated bottom plate (1) upper end and fixed back downwardly extending with second strengthening rib (4) and third strengthening rib (5) fixed with first strengthening rib (3).
2. A novel prefabricated panel according to claim 1, characterised in that: the first supporting piece (6) is a steel wire, and the second supporting piece (7) is made of a steel bar.
3. A novel prefabricated panel according to claim 1, characterised in that: the first reinforcing rib (3), the second reinforcing rib (4) and the third reinforcing rib (5) are all made of short reinforcing steel bars.
4. A novel prefabricated panel according to claim 3, characterised in that: first strengthening rib (3) and second strengthening rib (4) parallel arrangement just are straight reinforcing bar, third strengthening rib (5) wholly are the V font and both ends are equipped with the bent angle.
5. A novel prefabricated panel according to claim 1, characterised in that: the side edges of two ends of the prefabricated bottom plate (1) are inclined.
6. A novel preformed sheet as claimed in claim 5, in which: the included angle alpha between the side edges at the two ends of the prefabricated bottom plate (1) and the horizontal plane is 45-60 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010682779.5A CN111749383A (en) | 2020-07-15 | 2020-07-15 | Novel prefabricated slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010682779.5A CN111749383A (en) | 2020-07-15 | 2020-07-15 | Novel prefabricated slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111749383A true CN111749383A (en) | 2020-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010682779.5A Pending CN111749383A (en) | 2020-07-15 | 2020-07-15 | Novel prefabricated slab |
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| Country | Link |
|---|---|
| CN (1) | CN111749383A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112942658A (en) * | 2021-01-29 | 2021-06-11 | 重庆恒昇大业建筑科技集团有限公司 | Prefabricated bottom plate preparation method, prefabricated bottom plate structure and construction method thereof |
| CN113250449A (en) * | 2021-06-21 | 2021-08-13 | 江苏昊钢建筑科技有限公司 | Assembled steel bar truss building carrier plate |
-
2020
- 2020-07-15 CN CN202010682779.5A patent/CN111749383A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112942658A (en) * | 2021-01-29 | 2021-06-11 | 重庆恒昇大业建筑科技集团有限公司 | Prefabricated bottom plate preparation method, prefabricated bottom plate structure and construction method thereof |
| CN112942658B (en) * | 2021-01-29 | 2022-08-05 | 重庆恒昇大业建筑科技集团有限公司 | Prefabricated bottom plate preparation method, prefabricated bottom plate structure and construction method thereof |
| CN113250449A (en) * | 2021-06-21 | 2021-08-13 | 江苏昊钢建筑科技有限公司 | Assembled steel bar truss building carrier plate |
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