CN219773326U - Support-free composite floor slab - Google Patents
Support-free composite floor slab Download PDFInfo
- Publication number
- CN219773326U CN219773326U CN202321028849.0U CN202321028849U CN219773326U CN 219773326 U CN219773326 U CN 219773326U CN 202321028849 U CN202321028849 U CN 202321028849U CN 219773326 U CN219773326 U CN 219773326U
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- Prior art keywords
- concrete
- support
- rigidity
- reinforcing
- truss
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- 239000002131 composite material Substances 0.000 title claims abstract description 29
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 54
- 239000011178 precast concrete Substances 0.000 claims abstract description 37
- 239000004567 concrete Substances 0.000 claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 34
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 9
- 238000010276 construction Methods 0.000 abstract description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract description 2
- 230000002787 reinforcement Effects 0.000 description 3
- 239000004566 building material Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The utility model relates to a support-free composite floor slab, which comprises a partial ribbed prefabricated bottom plate and a post-cast concrete layer cast on the upper side surface of the partial ribbed prefabricated bottom plate; the local ribbed precast bottom plate comprises a precast concrete plate and a plurality of rigidity reinforcing units which are arranged on the upper side of the precast concrete plate at intervals. The utility model aims to provide a support-free composite floor slab which can overcome the problems and can obviously improve the construction speed and reduce the manufacturing cost. The utility model has the advantages that: 1. the rigidity of the local ribbed prefabricated bottom plate can be increased through the arrangement of the rigidity reinforcing unit, so that the support-free and mould-free construction on site is realized, the construction speed is remarkably increased, and the site construction cost is reduced; 2. the rigidity reinforcing unit is only arranged in the middle-crossing region of the partial ribbed prefabricated bottom plate, so that the material consumption can be reduced; 3. the concrete ribs extend out of the two ends of the plane steel bar truss, so that stress concentration caused by section change can be relieved, and floor cracking is avoided.
Description
Technical Field
The utility model relates to the technical field of assembled buildings, in particular to a support-free composite floor slab.
Background
In recent years, fabricated buildings are rapidly developing in China. The national institute discharge station (instruction on the great development of the assembled building) further definitely aims to actively popularize green building and building materials in future, and the assembled building accounts for 30% of the newly built building in about 10 years.
When the prior fabricated concrete building adopts the composite floor slab, the support is usually required to be arranged at the construction stage. When the layer height is large, the support system is complex and expensive. Therefore, in order to accelerate the construction speed and reduce project measure cost, the support-free mold for realizing the prefabricated structure construction has great practical value.
Disclosure of Invention
The utility model aims to provide a support-free composite floor slab which can overcome the problems and can obviously improve the construction speed and reduce the manufacturing cost.
The aim of the utility model is realized by the following technical scheme:
a support-free composite floor slab comprises a partial ribbed precast bottom plate and a post-cast concrete layer cast on the upper side surface of the partial ribbed precast bottom plate; the local ribbed precast bottom plate comprises precast concrete plates and a plurality of rigidity reinforcing units arranged on the upper sides of the precast concrete plates at intervals, the long axes of the rigidity reinforcing units are parallel to the span direction of the precast concrete plates, the rigidity reinforcing units comprise rigidity reinforcing trusses and concrete ribs poured on the upper parts of the rigidity reinforcing trusses, both ends of the rigidity reinforcing trusses extend out of the concrete ribs, and the lower parts of the rigidity reinforcing trusses are buried in the precast concrete plates; the rigidity reinforcing units are arranged in pairs and are symmetrically distributed by the central axis of the precast concrete board; the distance between the end of the rigidity reinforcing unit and the end of the corresponding side precast concrete slab is greater than 0.15 times of the span of the support-free composite floor slab and less than 0.4 times of the span of the support-free composite floor slab.
Compared with the prior art, the utility model has the advantages that:
1. the rigidity of the local ribbed prefabricated bottom plate can be increased through the arrangement of the rigidity reinforcing unit, so that the support-free and mould-free construction on site is realized, the construction speed is remarkably increased, and the site construction cost is reduced;
2. the rigidity reinforcing unit is only arranged in the middle-crossing region of the partial ribbed prefabricated bottom plate, so that the material consumption can be reduced;
3. the concrete ribs extend out of the two ends of the plane steel bar truss, so that stress concentration caused by section change can be relieved, and floor cracking is avoided;
4. the outer extending section of the plane steel bar truss can be used as a hanging point of the prefabricated component, so that a special hanging ring is avoided, and material consumption is reduced;
5. the areas, which are close to the two ends of the plate span and are not provided with the rigidity reinforcing units, can be used for burying the embedded pipeline, so that the embedded pipeline does not need to pass through the rigidity reinforcing units, and the construction efficiency is improved;
6. the rigidity reinforcing unit is pressed into the precast concrete slab before initial setting, so that the rigidity reinforcing unit can be prevented from being polluted during concrete pouring, and the bottom surface of the concrete rib of the rigidity reinforcing unit can be tightly attached to the top surface of the precast concrete slab.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of a support-free composite floor slab according to the present utility model.
Fig. 2 is a schematic perspective view of a partially ribbed pre-fabricated floor.
Fig. 3 is a schematic perspective view of the rigidity reinforcing unit.
Fig. 4 is a construction method of a support-free composite floor slab (step 1).
Fig. 5 is a construction method of a support-free composite floor slab (step 2).
Fig. 6 is a construction method of a support-free composite floor slab (step 3).
Fig. 7 is a construction method of a support-free composite floor slab (step 4).
Fig. 8 is a schematic illustration of pipeline embedding for a support-free composite floor slab.
Description of the reference numerals: 1 part of a ribbed precast bottom plate, 1-1 precast concrete slab, 1-2 reinforcing steel meshes, 1-3 stereoscopic steel bar trusses, 2 post-cast concrete layers, 3 rigidity reinforcing units, 3-1 concrete ribs, 3-2 plane steel bar trusses, 3-3U-shaped connecting steel bars, 3-4 reinforcing steel bars, 4 embedded parts and 5 embedded pipelines.
Detailed Description
The present utility model is described in detail below with reference to the drawings and examples of the specification:
fig. 1-3 show schematic views of an embodiment of a support-free composite floor slab according to the present utility model.
A support-free composite floor slab comprises a partial ribbed precast bottom plate 1 and a post-cast concrete layer 2 cast on the upper side surface of the partial ribbed precast bottom plate 1;
the local ribbed precast bottom plate 1 comprises precast concrete plates 1-1 and a plurality of rigidity reinforcing units 3 which are arranged at intervals on the upper side of the precast concrete plates 1-1, the long axis of each rigidity reinforcing unit 3 is parallel to the span direction of the precast concrete plate 1-1, the rigidity reinforcing units 3 comprise rigidity reinforcing trusses and concrete ribs 3-1 cast on the upper parts of the rigidity reinforcing trusses, two ends of each rigidity reinforcing truss extend out of the concrete ribs 3-1, and the lower parts of the rigidity reinforcing trusses are buried in the precast concrete plates 1-1;
the rigidity reinforcing units 3 are arranged in pairs and are symmetrically distributed with the central axis of the precast concrete slab 1-1;
the distance between the end of the stiffness reinforcement unit 3 and the end of the corresponding side precast concrete deck 1-1 is greater than 0.15 times the span of the support-free composite floor deck and less than 0.4 times the span of the support-free composite floor deck.
The local ribbed precast bottom plate 1 further comprises a steel mesh 1-2 buried in the precast concrete plate 1-1, a three-dimensional steel truss 1-3 is fixed on the upper side of the steel mesh 1-2, and the upper part of the three-dimensional steel truss 1-3 extends out of the precast concrete plate 1-1;
the three-dimensional steel bar truss 1-3 is parallel to the rigidity reinforcing units 3 and is positioned between the two rigidity reinforcing units 3.
The three-dimensional steel bar truss 1-3 comprises an upper chord member and two lower chord members, and the upper chord members and the lower chord members are connected through diagonal web members to form a whole.
When the precast concrete slab 1-1 is poured, the lower chord member and the lower section of the diagonal web member of the stereoscopic steel bar truss 1-3 are positioned in the precast concrete slab 1-1.
The rigidity reinforced truss comprises two vertically arranged plane steel bar trusses 3-2; each planar steel bar truss 3-2 comprises an upper chord, a lower chord and an inclined web member connected between the upper chord and the lower chord, and U-shaped connecting steel bars 3-3 are arranged between the lower chords of the two planar steel bar trusses 3-2;
the U-shaped connecting steel bars 3-3 are welded at the end parts and the middle parts of the two plane steel bar trusses 3-2.
The lower chords and the lower sections of the diagonal web members of the planar steel bar truss 3-2 extend out of the concrete rib 3-1, and both ends of the planar steel bar truss 3-2 extend out of the concrete rib 3-1. The planar steel bar truss 3-2 is in a meshed state with the concrete rib 3-1.
The two ends of the rigidity reinforced truss are respectively provided with a reinforcing steel bar 3-4, and the reinforcing steel bars 3-4 are connected between the lower chords of the plane reinforced truss 3-2.
The precast concrete slab 1-1 is made of concrete, is integrally sheet-shaped, and has a rough top surface; the reinforcing steel bars in the span direction of the reinforcing steel bar net sheet 1-2 extend out of the precast concrete board 1-1.
Fig. 4-8 are schematic diagrams of a construction method of a support-free composite floor slab.
The construction method of the support-free composite floor slab comprises the following steps:
s1, welding a plane steel bar truss 3-2, U-shaped connecting steel bars 3-3 and reinforcing steel bars 3-4 to form a rigidity reinforcing truss, inversely placing the rigidity reinforcing truss into a mould to pour concrete, forming a concrete rib 3-1 on the upper part of the rigidity reinforcing truss, and finally manufacturing a rigidity reinforcing unit 3 (see figure 4);
s2, placing the reinforcing mesh sheet 1-2 and the three-dimensional reinforcing truss 1-3 into a mould of the precast concrete slab 1-1, and pouring concrete (see FIG. 5);
s3, pressing the rigidity reinforcing truss at the lower side of the concrete rib 3-1 into concrete before the initial setting of the concrete of the precast concrete slab 1-1, and manufacturing a partial ribbed precast bottom plate 1 after the concrete is hardened (see FIG. 6);
s4, hanging hooks on upper chord nodes of plane steel bar trusses 3-2 extending outwards from two ends of the rigidity reinforcing unit 3, hoisting the partial ribbed prefabricated bottom plate 1 into position, casting concrete on the surface of the partial ribbed prefabricated bottom plate to form a post-cast concrete layer 2, and completing construction of the support-free composite floor slab (see figure 7).
In step S3, the bottom surface of the concrete rib 3-1 is closely attached to the top surface of the precast concrete panel 1-1.
In step S3, the stiffness reinforcement units 3 are arranged in pairs and symmetrically distributed about the central axis of the precast concrete slab 1-1, and before the post-cast concrete layer 2 is cast, the embedded part 4 and the embedded pipeline 5 (see fig. 8) are placed between the two stiffness reinforcement units 3.
The present utility model is not limited to the above embodiments, and all the technical solutions that are the same or similar to the present utility model fall within the protection scope of the present utility model.
Claims (5)
1. The utility model provides a exempt from to support coincide floor which characterized in that: the concrete pouring structure comprises a local ribbed precast bottom plate (1) and a post-pouring concrete layer (2) poured on the upper side surface of the local ribbed precast bottom plate (1);
the local ribbed precast bottom plate (1) comprises precast concrete plates (1-1) and a plurality of rigidity reinforcing units (3) which are arranged on the upper side of the precast concrete plates (1-1) at intervals, the long axis of each rigidity reinforcing unit (3) is parallel to the span direction of the precast concrete plates (1-1), each rigidity reinforcing unit (3) comprises a rigidity reinforcing truss and concrete ribs (3-1) cast on the upper parts of the rigidity reinforcing trusses, both ends of each rigidity reinforcing truss extend out of the concrete ribs (3-1), and the lower parts of the rigidity reinforcing trusses are buried in the precast concrete plates (1-1);
the rigidity reinforcing units (3) are arranged in pairs and are symmetrically distributed by the central axis of the precast concrete board (1-1);
the distance between the end of the rigidity reinforcing unit (3) and the end of the corresponding side precast concrete slab (1-1) is more than 0.15 times of the span of the support-free composite floor slab and less than 0.4 times of the span of the support-free composite floor slab.
2. A support-free composite floor slab according to claim 1, wherein: the local ribbed precast bottom plate (1) further comprises a reinforcing mesh (1-2) buried in the precast concrete plate (1-1), a three-dimensional reinforcing truss (1-3) is fixed on the upper side of the reinforcing mesh (1-2), and the upper part of the three-dimensional reinforcing truss (1-3) extends out of the precast concrete plate (1-1);
the three-dimensional steel bar trusses (1-3) are parallel to the rigidity reinforcing units (3) and are positioned between the two rigidity reinforcing units (3).
3. A support-free composite floor slab according to claim 1, wherein: the rigidity reinforced truss comprises two vertically arranged plane steel bar trusses (3-2);
each plane steel bar truss (3-2) comprises an upper chord, a lower chord and a diagonal web member connected between the upper chord and the lower chord, and U-shaped connecting steel bars (3-3) are arranged between the lower chords of the two plane steel bar trusses (3-2);
the lower chord member and the lower section of the inclined web member of the plane steel bar truss (3-2) extend out of the concrete rib (3-1), and both ends of the plane steel bar truss (3-2) extend out of the concrete rib (3-1).
4. A support-free composite floor slab according to claim 3, wherein: the two ends of the rigidity reinforced truss are respectively provided with a reinforcing steel bar (3-4), and the reinforcing steel bars (3-4) are connected between the lower chords of the plane reinforced truss (3-2).
5. A support-free composite floor slab according to claim 2, wherein: the precast concrete slab (1-1) is made of concrete, is integrally sheet-shaped, and has a rough top surface; the steel bars in the span direction of the steel bar net sheet (1-2) extend out of the precast concrete board (1-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321028849.0U CN219773326U (en) | 2023-04-29 | 2023-04-29 | Support-free composite floor slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321028849.0U CN219773326U (en) | 2023-04-29 | 2023-04-29 | Support-free composite floor slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219773326U true CN219773326U (en) | 2023-09-29 |
Family
ID=88109411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321028849.0U Active CN219773326U (en) | 2023-04-29 | 2023-04-29 | Support-free composite floor slab |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219773326U (en) |
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2023
- 2023-04-29 CN CN202321028849.0U patent/CN219773326U/en active Active
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