CN110258907B - Prefabricated plate, manufacturing method, composite floor slab and manufacturing method - Google Patents
Prefabricated plate, manufacturing method, composite floor slab and manufacturing method Download PDFInfo
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- CN110258907B CN110258907B CN201910408123.1A CN201910408123A CN110258907B CN 110258907 B CN110258907 B CN 110258907B CN 201910408123 A CN201910408123 A CN 201910408123A CN 110258907 B CN110258907 B CN 110258907B
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- strip
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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
- E04B5/17—Floor structures partly formed in situ
- E04B5/18—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly cast between filling members
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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
- E04C2/049—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 completely or partially of insulating material, e.g. cellular concrete or foamed plaster
-
- 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
- E04C2/44—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose
- E04C2/50—Self-supporting slabs specially adapted for making floors ceilings, or roofs, e.g. able to be loaded
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention discloses a prefabricated plate, a manufacturing method, a composite floor slab and a manufacturing method, relates to the technical field of assembly type buildings, and aims to solve the problems that an existing prefabricated plate is high in construction difficulty, long in labor hour consumption, low in die reuse rate and high in cost. The precast slab comprises a slab body, wherein a plurality of strip-shaped grooves with the axial leads perpendicular to the corresponding edges are formed in each edge of the surface of the slab body, which is used for pouring a concrete cast-in-situ layer, and penetrate through the surface of the slab body, which is used for pouring the concrete cast-in-situ layer; the strip-shaped groove is used for assembling first reinforcing steel bars, and the first reinforcing steel bars are used for improving the pressure-bearing performance of the plate body after concrete is poured on the plate body; the prefabricated slab is used for building construction.
Description
Technical Field
The invention relates to the technical field of assembled buildings, in particular to a prefabricated plate and a manufacturing method thereof, a laminated floor slab and a manufacturing method thereof.
Background
With the development of modern industrial technology, the building house can also be manufactured in batches like machine production, and only prefabricated house components are transported to a construction site for assembly. Because of the rapid construction speed of the fabricated building and the low production cost, the fabricated building is rapidly popularized around the world.
The prefabricated slab is a floor slab used in early building, and is called as a prefabricated slab because the prefabricated slab is a prefabricated concrete component which is prefabricated in a factory and is directly transported to a construction site for installation. When the prefabricated plate is manufactured, firstly, a hollow model is manufactured by using a wood plate, reinforcing steel bars are arranged at the hollow part of the model, then, cement is filled in the hollow part, the wood plate is removed after the cement is solidified, and the rest solidified cement plate is the prefabricated plate.
When the existing precast slabs are constructed, the precast slabs are spliced by taking a supporting beam and a bearing wall as supports, and a reinforcement cage is required to be arranged in a gap between two adjacent precast slabs, the two precast slabs are respectively connected with the reinforcement cage, so that the reinforcement embedded in the precast slabs is required to be partially positioned outside the precast slabs, the reinforcement positioned outside the precast slabs stretches into the reinforcement cage arranged between the two precast slabs and bends and fixes the part stretching into the reinforcement cage, after the splicing of the precast slabs is completed, wood forms are built around the spliced precast slabs, then concrete pouring is carried out on the top surfaces of the precast slabs to form a concrete cast-in-place layer, and the spliced precast slabs meet the requirement of bearing load. However, the prefabricated plate is complex to operate and has a large number of working hours in the construction process, and in the prefabrication process, the prefabricated plates with different sizes need to be embedded with reinforcing steel bars at different positions according to stress requirements, so that when the prefabricated plate is manufactured, holes are formed in the positions, corresponding to the reinforcing steel bars positioned outside the prefabricated plate, of the model, and the mould with holes is only used for producing the corresponding prefabricated plate, so that the repeated use rate of the mould is low, the cost of the mould is increased, and the design and processing period of the mould are long.
Disclosure of Invention
The embodiment of the invention provides a prefabricated plate, a manufacturing method, a composite floor slab and a manufacturing method, which can reduce construction difficulty and consumed working hours, and the die has high repeated use rate, reduces the manufacturing cost of the die and shortens the design and processing period of the die.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical scheme:
The precast slab comprises a slab body, wherein a plurality of strip-shaped grooves with the axial leads perpendicular to the corresponding edges are formed in each edge of the surface of the slab body, which is used for pouring a concrete cast-in-situ layer, and penetrate through the surface of the slab body, which is used for pouring the concrete cast-in-situ layer; the strip-shaped groove is used for assembling a first reinforcing steel bar, one end of the first reinforcing steel bar extends into the strip-shaped groove, and the other end of the first reinforcing steel bar extends to the outside of the plate body.
When the precast slab provided by the embodiment of the invention is constructed, the precast slabs are spliced by taking the supporting beams and the bearing walls as supports, the precast slabs are firstly placed at the preset positions, then the first reinforcing steel bars are inserted into the corresponding strip-shaped grooves on the two adjacent precast slabs, the wood forms are built around the spliced precast slabs, and then the top surfaces of the spliced precast slabs are integrally subjected to concrete pouring, so that the construction difficulty is low, the operation is simple, and the labor hour consumption is low.
Still further, every bar groove department on the board body, along the axial of bar groove all is provided with spiral stirrup, spiral stirrup is pre-buried in the board body to encircle the bar inslot portion, the axial lead of spiral stirrup with the axial lead coincidence of bar groove.
Still further, the first reinforcing bar inserts the one end in the bar groove is provided with the second reinforcing bar, the second reinforcing bar with first reinforcing bar parallel arrangement each other, first reinforcing bar with second reinforcing bar fixed connection.
Still further, the first reinforcing bar inserts the one end bending of bar groove, and follows the radial extension of bar groove the board body, the first reinforcing bar stretches out the tip fixedly connected with pressure-bearing steel sheet of board body, pressure-bearing steel sheet with the board body parallel arrangement.
Further, through holes are formed in the pressure-bearing steel plates, and the end portions of the first reinforcing steel bars are inserted into the through holes and fixedly connected with the pressure-bearing steel plates.
Further, the vertical depth of the strip-shaped groove in the thickness direction of the plate body is greater than one half of the thickness of the plate body.
Further, the cross section of the strip-shaped groove is arc-shaped.
Further, a plurality of embedded bars which are mutually perpendicular are arranged in the plate body.
Still further, truss ribs are provided within the plate body.
A manufacturing method of a prefabricated plate comprises the following specific manufacturing steps:
step one, manufacturing a hollow model;
step two, placing a plurality of strip-shaped objects with axial leads perpendicular to the inner wall in the hollow model;
pouring cement into the hollow model;
and step four, removing the hollow model and the strip-shaped object after the cement is solidified, so as to obtain the prefabricated plate.
The mould for manufacturing the precast slab does not need to be provided with holes, the mould can be used for manufacturing precast slabs with different structures, the repeated use rate of the mould is improved, moreover, the precast slabs with strip-shaped grooves or holes are required to be arranged on the plate surface, objects with corresponding shapes are placed at corresponding positions in the mould during manufacturing, then concrete is poured, the mould and the objects in the mould are taken down after the concrete is solidified, and the mould with corresponding structures is not required to be designed and manufactured for precast slabs with different structures, so that the manufacturing cost of the mould is reduced, and the design and manufacturing period of the mould are shortened.
A composite floor slab comprises a plurality of precast slabs and a concrete cast-in-situ layer; and a post-cast strip is arranged between two adjacent precast slabs, two ends of the first reinforcing steel bars are respectively inserted into the strip-shaped grooves corresponding to the positions on the two adjacent precast slabs along the axial direction of the strip-shaped grooves, and the concrete cast-in-situ layer is poured on the precast slabs, in the strip-shaped grooves and in the post-cast strip between the two adjacent precast slabs.
The assembled composite floor slab provided by the embodiment of the invention has the advantages that the steel bar connection mode is realized by only inserting the first reinforcing steel bars in site and pouring concrete in site, the construction operation is simple, the construction efficiency is high, and the construction quality can be ensured.
A manufacturing method of a composite floor slab comprises the following specific manufacturing steps:
step 1, respectively placing a plurality of precast slabs at preset positions;
step 2, gaps are reserved between two adjacent precast slabs to form a post-cast strip;
Step 3, placing first reinforcing steel bars, wherein two ends of each first reinforcing steel bar are respectively placed into the corresponding strip-shaped grooves on the two adjacent precast slabs;
Step 4, building a wood pattern around the spliced precast slabs;
step 5, pouring a concrete cast-in-place layer into the wood mould, wherein the concrete cast-in-place layer is poured on the precast slab, in the strip-shaped groove and in the post-pouring belt;
and 6, dismantling the wood form after the concrete cast-in-situ layer is solidified, wherein the concrete cast-in-situ layer, the precast slabs and the first reinforcing steel bars form a laminated floor slab.
When the composite floor slab is manufactured and constructed, the prefabricated plates are supported by the supporting beams and the bearing walls, each layer of floor slab is spliced, the prefabricated plates are lifted and placed at the designated positions, a post-cast strip is reserved between two adjacent prefabricated plates, then first reinforcing steel bars are inserted into corresponding strip-shaped grooves between the adjacent prefabricated plates, wood forms are built around the spliced prefabricated plates, finally, the top surfaces of the spliced prefabricated plates are integrally subjected to mixed soil casting, and the composite floor slab is formed.
Drawings
FIG. 1 is a schematic view of a prefabricated panel according to an embodiment of the present invention;
FIG. 2 is a bottom view of FIG. 1;
fig. 3 is a partial schematic view showing a connection structure between two prefabricated panels provided with spiral stirrups and a first reinforcing steel bar according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of FIG. 3;
fig. 5 is a partial schematic view showing a connection structure between two prefabricated panels provided with pressure-bearing steel plates and a first reinforcing steel bar according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of FIG. 5;
fig. 7 is a schematic structural view of embedded bars, embedded bars and truss bars arranged in a precast slab according to an embodiment of the present invention;
fig. 8 is a schematic structural view of a composite floor slab according to an embodiment of the present invention.
Reference numerals: 1. a plate body; 2. a bar-shaped groove; 3. a first reinforcing bar; 4. spiral stirrups; 5. a second reinforcing bar; 6. a pressure-bearing steel plate; 7. embedding reinforcing steel bars; 8. a concrete cast-in-situ layer; 9. truss ribs; 10. post-cast strip.
Detailed Description
The following describes a prefabricated slab, a manufacturing method, a laminated floor slab and a manufacturing method in detail, which are provided by the embodiment of the invention, with reference to the accompanying drawings.
In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
A precast slab, as shown in figure 1, figure 2, comprising a slab body 1, wherein a plurality of strip-shaped grooves 2 with axial leads perpendicular to the corresponding edges are formed on each edge of the surface of the slab body 1 for casting a concrete cast-in-situ layer, and the strip-shaped grooves 2 penetrate through the surface of the slab body 1 for casting the concrete cast-in-situ layer; the strip-shaped groove 2 is internally provided with a first reinforcing steel bar 3, one end of the first reinforcing steel bar 3 extends into the strip-shaped groove 2, the other end of the first reinforcing steel bar 3 extends to the outside of the plate body 1, and the first reinforcing steel bar 3 is used for improving the bearing performance of the plate body 1 after concrete is poured.
When the precast slab provided by the embodiment of the invention is constructed, the precast slabs are spliced by taking the supporting beams and the bearing walls as supports, the precast slabs are firstly placed at preset positions, then first reinforcing steel bars 3 are inserted into corresponding strip-shaped grooves 2 on two adjacent slabs, wood forms are built around the spliced precast slabs, then concrete pouring is carried out on the top surfaces of the spliced precast slabs, and the precast slab is low in construction difficulty, simple to operate and less in labor hour consumption. As shown in fig. 3 and fig. 4, in the prefabricated slab provided by the embodiment of the invention, spiral stirrups 4 are respectively arranged at each bar-shaped groove 2 on the slab body 1 along the axial direction of the bar-shaped groove 2, the spiral stirrups 4 are pre-embedded in the slab body 1 and encircle the outside of the bar-shaped groove 2, and the axial lead of the spiral stirrups 4 coincides with the axial lead of the bar-shaped groove 2. By winding the spiral stirrups 4 on each strip-shaped groove 2, the whole continuous characteristic of the spiral stirrups 4 is utilized, so that the bearing load capacity of the precast slab can be improved, and the engineering quality is ensured.
The anchoring of the steel bars means that the steel bars extend into members such as beams, plates and columns, the stress performance of the reinforced concrete structural member mainly depends on the bonding anchoring effect between the steel bars and the concrete, the anchoring length of the steel bars means the length of the steel bars extending into the members such as beams, plates and columns, for the prefabricated plates provided by the embodiment of the invention, the size of the prefabricated plates is determined according to practical conditions, for the prefabricated plates with different sizes, the lengths of the first reinforcing steel bars 3 and the strip-shaped grooves 2 can be adjusted according to conditions to meet the stress requirements of the prefabricated plates for bearing the load, and in order to avoid overlong lengths of the strip-shaped grooves 2 and the first reinforcing steel bars 3, as shown in fig. 3 and 4, one end of the first reinforcing steel bars 3 inserted into the strip-shaped grooves 2 is provided with the second reinforcing steel bars 5, the second reinforcing steel bars 5 are arranged in parallel with the first reinforcing steel bars 3, and preferably the second reinforcing steel bars 5 are arranged towards the inner end faces of the strip-shaped grooves 2, and the first reinforcing steel bars 3 are flush with each other, and the first reinforcing steel bars 3 are fixedly connected with the second reinforcing steel bars 5. According to the embodiment of the invention, the second reinforcing steel bars 5 are respectively fixedly arranged at the two ends of the first reinforcing steel bar 3, and the anchoring length of the first reinforcing steel bar 3 is reduced by adopting a connecting mode of double-sided adhesive welding, so that the length of the first reinforcing steel bar 3 can be shortened on the premise of meeting the integral bearing condition, and the steel bar materials are saved.
The prefabricated slab according to the embodiment of the present invention provides another structure for reinforcing the overall bearing capacity, as shown in fig. 5 and 6, where one end of the first reinforcing steel bar 3 inserted into the strip-shaped groove 2 is bent and extends out of the slab body 1 along the radial direction of the strip-shaped groove 2, and the end of the first reinforcing steel bar 3 extending out of the slab body 1 is fixedly connected with a bearing steel plate 6, and the bearing steel plate 6 is parallel to the slab body 1. When a common precast floor slab with a rib is constructed on site, a reinforcement cage is required to be arranged between the floor slabs, the rib is bent and then is stretched into the reinforcement cage, and finally pouring is performed.
In order to fix the end of the bearing steel plate 6 and the end of the first reinforcing steel bar 3, the operation is more convenient, a through hole is formed in the bearing steel plate 6, and the end of the first reinforcing steel bar 3 is inserted into the through hole and fixedly connected with the bearing steel plate 6, as shown in fig. 5 and 6. In the embodiment of the invention, the through holes are arranged on the pressure-bearing steel plate 6, the end parts of the first reinforcing steel bars 3 are inserted into the through holes, and then the first reinforcing steel bars are fixed from the top surface of the pressure-bearing steel plate 6 through the processes of welding and the like, so that the construction is simpler and more convenient.
It should be noted that, when the two structures for reinforcing the overall bearing performance provided by the embodiment of the invention are used, the two structures can be used as a reinforcing structure according to actual needs, namely, the spiral stirrups 4, the second reinforcing steel bars 5 and the bearing steel plates 6 are simultaneously arranged on the plate body 1, so that the overall bearing performance of the precast slab is better.
In the building, the pressure load applied to the precast slab is vertically downward, that is, the closer to the bottom surface of the precast slab, the greater the pressure applied thereto, so that the first reinforcing steel bars 3 are disposed in the area of the precast slab close to the bottom surface, and the entire bearing capacity of the precast slab can be increased after the integral casting. Therefore, in the embodiment of the present invention, the vertical depth of the bar-shaped groove 2 along the thickness direction of the plate body 1 is preferably greater than one half of the thickness of the plate body 1, so that the first reinforcing steel bar 3 is positioned in the area of the plate body 1 near the bottom surface in the vertical direction when placed in the bar-shaped groove 2.
Since it is necessary to place filling objects of different sizes in a mold to form the bar-shaped grooves 2 of different sizes when manufacturing the prefabricated panels, it is preferable to use an object having a common and regular shape in cross section, and the cross section of the bar-shaped groove 2 of the embodiment of the present invention is circular arc-shaped as shown in fig. 2 and 7. The cross section is regular shape, namely the cross section is polygon or circular, when manufacturing prefabricated plate, because the size of bar groove 2 cross section and the length of bar groove 2 all need adjust at any time according to different circumstances, so the cross section is polygonal's object be difficult to find the object that accords with the size requirement, so need to process according to the size requirement, increased construction duration, and the cross section is circular's object such as rubber tube, steel pipe etc. and various pipes all have different size models, so the optional size is many, need not spend too much time to look for or process the filler object.
In order to improve the stress performance of the prefabricated plate, as shown in fig. 7, a plurality of embedded bars 7 are arranged in the plate body 1 and are perpendicular to each other. Through setting up mutually perpendicular's embedded bar 7 to form reinforcing bar network structure, make the whole atress of prefabricated plate even, consolidate the atress performance of concrete prefabricated plate.
It should be noted that the embedded bars 7 are parallel to the top surface of the plate body 1 and are disposed at a position between the bottom surface of the plate body 1 and the bottom of the bar-shaped groove 2.
For easy lifting, as shown in fig. 7, truss ribs 9 are arranged in the plate body 1. The truss rib 9 is embedded in the plate body 1, the top end of the truss rib is exposed out of the top surface of the plate body 1, the stress performance of the plate body 1 can be further improved, and the truss rib is convenient to hoist and mount during site construction.
The embodiment of the invention provides a manufacturing method of a prefabricated plate, which comprises the following specific manufacturing steps:
step one, manufacturing a hollow model;
step two, placing a plurality of strip-shaped objects with axial leads perpendicular to the inner wall in the hollow model;
pouring cement into the hollow model;
and step four, removing the hollow model and the strip-shaped object after the cement is solidified, so as to obtain the prefabricated plate.
When the prefabricated plate provided by the embodiment of the invention is manufactured, the mould does not need to be perforated, the mould can be used for manufacturing prefabricated plates with different structures, the repeated use rate of the mould is improved, moreover, the prefabricated plates with the strip-shaped grooves 2 or holes are required to be arranged on the plate surface, during manufacturing, objects with corresponding shapes are placed in the corresponding positions in the mould, then concrete is poured, and the mould and the objects in the mould are taken down after the concrete is solidified, so that the mould with corresponding structures is not required to be designed and manufactured for the prefabricated plates with different structures, thereby reducing the manufacturing cost of the mould and shortening the design and manufacturing period of the mould.
A composite floor slab, as shown in figure 8, comprises a plurality of precast slabs according to the scheme and a concrete cast-in-situ layer 8; a post-cast strip 10 is arranged between two adjacent precast slabs, two ends of the first reinforcing steel bar 3 are respectively inserted into the strip-shaped grooves 2 corresponding to the positions on the two adjacent precast slabs along the axial direction of the strip-shaped grooves 2, and the concrete cast-in-situ layer 8 is cast on the precast slabs, in the strip-shaped grooves 2 and in the post-cast strip 10 between the two adjacent precast slabs.
As shown in FIG. 8, in the construction of the composite floor slab provided by the embodiment of the invention, the precast slabs are spliced by taking the supporting beams and the bearing walls as the supports, the precast slabs are lifted and placed at the designated positions, and the post-cast strip 10 is reserved between two adjacent precast slabs, and the width of the post-cast strip 10 is preferably less than or equal to 100mm. Then insert first reinforcement steel bar 3 in the bar groove 2 that corresponds between adjacent prefabricated plate to build the wood matrix around the prefabricated plate that splices, wholly carry out concrete placement to the prefabricated plate top surface that splices at last, thereby form coincide floor, this kind of coincide floor insert first reinforcement steel bar 3 and cast in place concrete on the scene can, construction operation is simple, and the efficiency of construction is high, and can guarantee construction quality.
A manufacturing method of a composite floor slab comprises the following specific manufacturing steps:
step 1, respectively placing a plurality of precast slabs at preset positions;
Step2, gaps are reserved between two adjacent precast slabs to form a post-cast strip 10;
Step 3, placing first reinforcing steel bars 3, wherein two ends of each first reinforcing steel bar 3 are respectively placed into the corresponding strip-shaped grooves 2 on two adjacent precast slabs;
Step 4, building a wood pattern around the spliced precast slabs;
step 5, pouring a concrete cast-in-place layer 8 into the wood mould, wherein the concrete cast-in-place layer 8 is poured on the precast slab, in the strip-shaped groove 2 and in the post-pouring belt 10;
and 6, dismantling the wood form after the concrete cast-in-situ layer 8 is solidified, wherein the concrete cast-in-situ layer 8, the precast slabs and the first reinforcing steel bars 3 form a laminated floor slab.
When the composite floor slab is manufactured and constructed, the prefabricated slabs are supported by the supporting beams and the bearing walls, each layer of floor slab is spliced, the prefabricated slabs are lifted and placed at the designated positions, the post-cast strips 10 are reserved between two adjacent prefabricated slabs, then the first reinforcing steel bars 3 are inserted into the corresponding strip-shaped grooves 2 between the adjacent prefabricated slabs, wood forms are built around the spliced prefabricated slabs, finally, the top surfaces of the spliced prefabricated slabs are integrally subjected to mixed soil casting to form the composite floor slab, and the composite floor slab is simple in construction operation and high in construction efficiency by inserting the first reinforcing steel bars 3 and casting concrete on site.
It should be noted that, in the composite floor slab provided by the embodiment of the invention, the prefabricated slab is spliced at the position of the beam or the bearing wall, the beam or the bearing wall is used for supporting, then the cast-in-situ is carried out, and the cast-in-situ is carried out at the position of the post-cast strip 10 which does not form the support in a hanging mode.
In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
1. The precast slab is characterized by comprising a slab body, wherein a plurality of strip-shaped grooves with axial leads perpendicular to the corresponding edges are formed in the edges of the surface of the slab body, which is used for pouring a concrete cast-in-situ layer, and the strip-shaped grooves penetrate through the surface of the slab body, which is used for pouring the concrete cast-in-situ layer; the strip-shaped groove is used for assembling a first reinforcing steel bar, one end of the first reinforcing steel bar extends into the strip-shaped groove, and the other end of the first reinforcing steel bar extends to the outside of the plate body;
Spiral stirrups are arranged at each strip-shaped groove on the plate body along the axial direction of the strip-shaped groove, and are pre-buried in the plate body and encircle the outside of the strip-shaped groove;
the first reinforcing steel bar is inserted into one end of the strip-shaped groove to be bent, and radially extends out of the plate body along the strip-shaped groove, and the end part of the first reinforcing steel bar extending out of the plate body is fixedly connected with a pressure-bearing steel plate.
2. A prefabricated panel according to claim 1, wherein the axis of the spiral stirrup coincides with the axis of the bar-shaped groove.
3. A prefabricated panel according to claim 1, wherein a second reinforcing bar is provided at one end of the first reinforcing bar inserted into the bar-shaped groove, the second reinforcing bar and the first reinforcing bar are disposed parallel to each other, and the first reinforcing bar and the second reinforcing bar are fixedly connected.
4. A prefabricated panel according to claim 1, wherein the pressure-bearing steel panel is disposed parallel to the panel body.
5. A prefabricated panel according to claim 4, wherein the pressure-bearing steel plate is provided with a through hole, and the end portion of the first reinforcing steel bar is inserted into the through hole and fixedly connected with the pressure-bearing steel plate.
6. A prefabricated panel according to claim 1, wherein the vertical depth of the strip-shaped groove in the thickness direction of the panel body is greater than one half of the thickness of the panel body.
7. A prefabricated panel according to claim 1, wherein the cross section of the strip-shaped groove is circular arc-shaped.
8. A prefabricated panel according to any one of claims 1 to 7, wherein a plurality of mutually perpendicular rebars are provided in the panel body.
9. A prefabricated panel according to any one of claims 1 to 7, wherein truss ribs are provided within the panel body.
10. A method for manufacturing a prefabricated panel according to any one of claims 1 to 9, comprising the specific steps of:
step one, manufacturing a hollow model;
step two, placing a plurality of strip-shaped objects with axial leads perpendicular to the inner wall in the hollow model;
pouring cement into the hollow model;
and step four, removing the hollow model and the strip-shaped object after the cement is solidified, so as to obtain the prefabricated plate.
11. A composite floor slab, which is characterized by comprising a plurality of precast slabs according to any one of claims 1-9 and a concrete cast-in-situ layer, wherein a post-cast strip is arranged between two adjacent precast slabs, two ends of a first reinforcing steel bar are respectively inserted into the corresponding strip-shaped grooves on the two adjacent precast slabs along the axial direction of the strip-shaped grooves, and the concrete cast-in-situ layer is cast on the precast slabs, in the strip-shaped grooves and in the post-cast strip between the two adjacent precast slabs.
12. A method for manufacturing a composite floor slab, for manufacturing the composite floor slab as claimed in claim 11, characterized by comprising the following specific manufacturing steps:
step 1, respectively placing a plurality of precast slabs at preset positions;
step 2, gaps are reserved between two adjacent precast slabs to form a post-cast strip;
step 3, placing first reinforcing steel bars, wherein two ends of each first reinforcing steel bar are respectively placed into strip-shaped grooves corresponding to the positions on two adjacent precast slabs;
Step 4, building a wood pattern around the spliced precast slabs;
step 5, pouring a concrete cast-in-place layer into the wood mould, wherein the concrete cast-in-place layer is poured on the precast slab, in the strip-shaped groove and in the post-pouring belt;
and 6, dismantling the wood form after the concrete cast-in-situ layer is solidified, wherein the concrete cast-in-situ layer, the precast slabs and the first reinforcing steel bars form a laminated floor slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910408123.1A CN110258907B (en) | 2019-05-15 | 2019-05-15 | Prefabricated plate, manufacturing method, composite floor slab and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910408123.1A CN110258907B (en) | 2019-05-15 | 2019-05-15 | Prefabricated plate, manufacturing method, composite floor slab and manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110258907A CN110258907A (en) | 2019-09-20 |
| CN110258907B true CN110258907B (en) | 2024-08-06 |
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| CN111456318B (en) * | 2020-04-10 | 2024-11-12 | 悉地国际设计顾问（深圳）有限公司 | Prefabricated board, manufacturing method, stacking method and construction method of prefabricated board |
| CN112681593A (en) * | 2020-12-16 | 2021-04-20 | 张小兵 | Cast-in-situ reinforced concrete floor formwork structure |
| CN112936506A (en) * | 2021-02-07 | 2021-06-11 | 肇泽辰 | Manufacturing method of prefabricated slab with built-in cavity |
| CN115126084B (en) * | 2022-07-14 | 2024-06-14 | 平煤神马建工集团有限公司 | Assembled reinforced concrete building structure and installation construction method thereof |
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