CN112982788A - Close-spliced precast concrete bidirectional composite floor slab with rib beam and construction method - Google Patents
Close-spliced precast concrete bidirectional composite floor slab with rib beam and construction method Download PDFInfo
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- CN112982788A CN112982788A CN202110436233.6A CN202110436233A CN112982788A CN 112982788 A CN112982788 A CN 112982788A CN 202110436233 A CN202110436233 A CN 202110436233A CN 112982788 A CN112982788 A CN 112982788A
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- composite floor
- floor slab
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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
- E04B5/48—Special adaptations of floors for incorporating ducts, e.g. for heating or ventilating
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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Abstract
The invention discloses a close-spliced precast concrete bidirectional composite floor slab with a ribbed beam and a construction method, wherein the upper surface of the composite floor slab is provided with a plurality of transverse ribbed beams made of mutually parallel reinforced concrete, and the ribbed beams and the composite floor slab are integrally formed; a reinforcing mesh is arranged in a plate body of the composite floor slab, the reinforcing mesh is formed by binding a plurality of transverse reinforcing steel bars and a plurality of longitudinal reinforcing steel bars, two ends of the transverse reinforcing steel bars are exposed from the side surface of the composite floor slab, and two ends of the longitudinal reinforcing steel bars are not exposed from the side surface of the composite floor slab; at least one of the two longitudinal sides of the upper surface of the composite floor slab is provided with a plurality of grooves which are arranged in parallel in the longitudinal direction, the grooves penetrate through the middle lower part of at least one rib beam, and through holes are formed in the parts of the grooves which are positioned under the rib beams.
Description
Technical Field
The invention relates to the technical field of precast concrete composite floor slabs, in particular to a close-spliced precast concrete bidirectional composite floor slab.
Background
At present, with the vigorous development of the building industry, the traditional house construction technology cannot meet the requirements of the modern society for houses due to a series of current situations of low production efficiency, low construction speed, large pollution, long construction period and the like.
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.
The prefabricated building mainly comprises a prefabricated concrete structure, and is a representative of a modern industrial production mode due to the adoption of standardized design, industrial production, prefabricated construction, informatization management and intelligent application.
The composite floor slab is an assembled integral floor slab formed by laminating prefabricated composite floor slabs and cast-in-place reinforced concrete. The prefabricated composite floor slab is prefabricated in a factory, is lifted in place by using a tower crane after being transported to the site, is laid with equipment pre-buried pipelines, is laid with an upper reinforcing mesh layer of the composite floor slab, and is poured with cast-in-place concrete on the prefabricated composite floor slab. The prefabricated composite floor slab is one of the components of structural floor slab and also is permanent formwork for cast-in-place reinforced concrete.
The prefabricated composite floor slab is specifically divided into a one-way composite slab (only two sides of which are exposed with steel bars) and a two-way composite slab (four sides of which are exposed with steel bars). According to 6.6.3 of the technical code for prefabricated concrete structures (JGJ1-2014), the design of the prefabricated panels is preferably one-way when separate joints are used between the prefabricated panels. For four-sided supported laminates with aspect ratios no greater than 3, the bi-directional panel design can be used when integral seams or no seams are used between the preformed panels. Accordingly, when the plate is large and needs to be divided and designed, and a one-way plate is designed, a separated seam is adopted; for bi-directional panel designs, panels with aspect ratios no greater than 3 are used with integral seams.
The one-way superimposed sheet only has both sides play muscle, and construction simple to operate, efficient, but close piece is more obvious, if later stage repair handles improper easy crack production.
The connection between the two-way superimposed sheets usually adopts a post-pouring belt form, also called an integral seam (the width of the abutted seam is 200-500mm), the structure is complex, the construction is complicated, and the steel bars are often collided; the post-cast strip needs to be independently supported by a formwork and a scaffold, and can not realize complete formwork-free support (assuming 3 superimposed sheets in a living room and 2 abutted seams with the width of about 500mm, 18 vertical supports and 9 discontinuous square timbers are needed for mounting the superimposed sheets, 2 formworks and 6 supports are needed for supporting the formwork, the construction difficulty is very high, and the quality is difficult to ensure); the top bracing crossbeam is forced to be cut off, can not guarantee the top of both sides parallel and level, and measurement, leveling need expend a large amount of manual works, and the work efficiency reduces, has seriously restricted two-way superimposed sheet's application.
Therefore, the development of the close-spliced precast concrete composite floor slab without supporting templates becomes one of the technical problems to be solved urgently in the field.
Disclosure of Invention
The invention aims to provide a close-spliced precast concrete bidirectional composite floor slab with a ribbed beam and a construction method.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a close-spliced precast concrete bidirectional composite floor slab with a rib beam is characterized in that the upper surface of the composite floor slab is provided with a plurality of transverse rib beams made of mutually parallel reinforced concrete, and the rib beams and the composite floor slab are integrally formed;
a reinforcing mesh is arranged in a plate body of the composite floor slab, the reinforcing mesh is formed by binding a plurality of transverse reinforcing steel bars and a plurality of longitudinal reinforcing steel bars, two ends of the transverse reinforcing steel bars are exposed from the side surface of the composite floor slab, and two ends of the longitudinal reinforcing steel bars are not exposed from the side surface of the composite floor slab;
at least one of the two longitudinal sides of the upper surface of the composite floor slab is provided with a plurality of grooves which are arranged in parallel in the longitudinal direction, the grooves penetrate through the middle lower part of at least one rib beam, and through holes are formed in the parts of the grooves which are positioned under the rib beams.
The rib beam is internally provided with an upper layer of transverse steel bars and a lower layer of transverse steel bars, each layer of transverse steel bars is 2, the upper layer of transverse steel bars and the lower layer of transverse steel bars are bound together through a plurality of stirrups which are parallel to each other, and the cross section of the rib beam is trapezoidal.
Wherein, the upper surface of rib roof beam is equipped with the rib roof beam recess of a plurality of equipartition.
And a plurality of longitudinal through holes are arranged at the middle lower part of the rib beam positioned at the middle part of the upper surface of the composite floor slab in a penetrating way.
The number of the through holes in the rib beam in the middle of the upper surface of the composite floor slab is less than that of the through holes in the rib beam on the edge of the upper surface of the composite floor slab.
Wherein, the upper surface of the composite floor slab is a rough surface.
When the composite floor slab is a side slab, only one of the two longitudinal sides of the upper surface of the composite floor slab is provided with a plurality of grooves which are longitudinally arranged in parallel.
When the composite floor slab is a middle slab, a plurality of grooves which are longitudinally arranged in parallel are arranged on the two longitudinal sides of the upper surface of the composite floor slab.
The invention discloses a construction method of a close-spliced precast concrete bidirectional composite floor slab with a ribbed beam, which comprises the following steps: two adjacent close-spliced precast concrete bidirectional composite floor slabs are closely spliced, lap-joint reinforcing steel bars pass through holes in rib beams at the edge part of the slab body and are placed in grooves of the two adjacent close-spliced precast concrete bidirectional composite floor slabs, pre-buried electric wires pass through the through holes in the rib beams at the middle part of the slab body and the through holes in the rib beams at the edge part of the slab body, after the laying is finished, an upper reinforcing steel bar net is laid, and concrete is poured to form a cast-in-situ layer of the composite floor slab.
Compared with the prior art, the invention has the outstanding effects that:
(1) the close-spliced precast concrete bidirectional composite floor slab with the ribbed beam can be constructed in a close-spliced mode, a formwork is not required, 2/3 construction materials can be saved, and 80% of operation labor cost is saved.
(2) The groove of two adjacent close-spliced precast concrete bidirectional composite floor slabs is provided with lap joint reinforcing steel bars (straight bars), so that force can be transferred in a real-phase lap joint manner, and the requirement of building earthquake resistance is met.
(3) The close-spliced precast concrete bidirectional composite floor slab with the ribbed beams is provided with the plurality of ribbed beams, the structural strength is far higher than that of a conventional triangular steel bar truss, the lap joint steel bars of two adjacent close-spliced precast concrete bidirectional composite floor slabs penetrate through the ribbed beams on the two plate bodies to form a net structure, the force transmission is realized through the lap joint of the steel bars, and the connection strength of a joint is ensured.
(4) The upper surface of the densely spliced precast concrete bidirectional composite floor slab with the ribbed beam is a rough surface, and a large number of ribbed beam grooves are formed in the upper surface of the ribbed beam, so that the bonding strength of the composite floor slab and an upper cast-in-place layer is ensured, the upper layer and the lower layer are greatly prevented from separating or dislocating, and the earthquake resistance is better.
The present invention will be further explained with reference to the drawings and the specific embodiments in the following.
Drawings
FIG. 1 is a top cross-sectional view of a dense splicing precast concrete bidirectional composite floor slab (middle slab) with a ribbed beam according to the present invention;
FIG. 2 is a front sectional view of a dense splicing precast concrete bidirectional composite floor slab (middle slab) with a ribbed beam according to the present invention;
FIG. 3 is a left side sectional view of the dense splicing precast concrete bidirectional composite floor slab (middle slab) with the ribbed beam according to the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 1 at "A";
FIG. 5 is an enlarged view of a portion of FIG. 1 at "B";
FIG. 6 is an enlarged view of a portion of FIG. 2 at "C";
FIG. 7 is an enlarged view of a portion of FIG. 3 at "D";
FIG. 8 is a top cross-sectional view of a close-coupled precast concrete bidirectional composite floor slab (sideboard) with a ribbed beam according to the present invention;
fig. 9 is a partial perspective view of the densely spliced precast concrete bidirectional composite floor slab with the ribbed beam according to the present invention.
Wherein, 11-groove, 12-rib beam, 13-transverse steel bar, 14-longitudinal steel bar, 15-stirrup, 121-rib beam groove and 122-through hole.
Detailed Description
Example 1
Referring to fig. 1-7 and 9, a dense splicing precast concrete bidirectional composite floor slab with ribbed beams, wherein the upper surface of the composite floor slab is provided with 3 transverse ribbed beams 12 made of reinforced concrete and parallel to each other, and the ribbed beams 12 and the composite floor slab are integrally formed; a reinforcing mesh is arranged in a plate body of the composite floor slab, the reinforcing mesh is formed by binding a plurality of transverse reinforcing steel bars 13 and a plurality of longitudinal reinforcing steel bars 14, two ends of each transverse reinforcing steel bar 13 are exposed from the side face of the composite floor slab, and two ends of each longitudinal reinforcing steel bar 14 are not exposed from the side face of the composite floor slab; the longitudinal two sides of the upper surface of the composite floor slab are respectively provided with a plurality of grooves 11 which are longitudinally arranged in parallel, the grooves 11 penetrate through the middle lower part of the rib beam 12 at the same side of the longitudinal side part of the upper surface of the composite floor slab, and the part of the groove 11 which is positioned right below the rib beam 12 is provided with a through hole 122.
An upper layer of transverse steel bars and a lower layer of transverse steel bars are arranged in the rib beam 12, each layer of transverse steel bars is 2, the upper layer of transverse steel bars and the lower layer of transverse steel bars are bound together through a plurality of stirrups 15 which are parallel to each other, and the cross section of the rib beam 12 is trapezoidal. The upper surface of the rib beam 12 is provided with a plurality of uniformly distributed rib beam grooves 121.
A plurality of longitudinal through holes 122 are arranged at the middle lower part of the rib beam 12 at the middle part of the upper surface of the laminated floor slab in a penetrating way. The through hole 122 is a section of pre-embedded corrugated pipe. The number of through holes 122 in the rib 12 in the middle of the upper surface of the composite floor slab is smaller than the number of through holes 122 in the rib 12 at the edge of the upper surface of the composite floor slab.
The upper surface of the composite floor slab is a rough surface.
This coincide floor is the medium plate, and when using, the vertical both sides of this coincide floor are all not placed on roof beam or wall body, need form reinforcing bar lap joint with adjacent coincide floor.
Example 2
As shown in fig. 8, compared with example 1, the dense splicing precast concrete bidirectional composite floor slab with the ribbed beam has the structural differences that: the composite floor slab is a side plate, and only one of two longitudinal sides of the upper surface of the composite floor slab is provided with a plurality of grooves which are arranged in parallel in the longitudinal direction. When the composite floor slab is used, one side with the groove in the two longitudinal sides of the composite floor slab is not placed on a beam or a wall body, and needs to form steel bar lap joint with the adjacent composite floor slab; the side without the groove is placed on the beam or the wall.
Example 3
The construction method of the close-spliced precast concrete bidirectional composite floor slab with the ribbed beam in the embodiment 1 or 2 is specifically as follows:
the two adjacent close-spliced precast concrete bidirectional composite floor slabs are closely spliced, horizontal lap joint steel bars (straight bars) penetrate through corrugated pipes in rib beams at the edge parts of the slabs and are placed in grooves of the two adjacent close-spliced precast concrete bidirectional composite floor slabs, embedded electric wires penetrate through holes in rib beams at the middle parts of the slabs and through holes in rib beams at the edge parts of the slabs, after the laying is finished, an upper reinforcing mesh is laid, and concrete is poured to form a cast-in-place layer of the composite floor slabs.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (9)
1. The utility model provides a take close two-way coincide floor of precast concrete of piecing together of girt, its characterized in that: the upper surface of the composite floor slab is provided with a plurality of transverse and mutually parallel rib beams (12) made of reinforced concrete, and the rib beams (12) and the composite floor slab are integrally formed;
a reinforcing mesh is arranged in a plate body of the composite floor slab, the reinforcing mesh is formed by binding a plurality of transverse reinforcing steel bars (13) and a plurality of longitudinal reinforcing steel bars (14), two ends of each transverse reinforcing steel bar (13) are exposed out of the side face of the composite floor slab, and two ends of each longitudinal reinforcing steel bar (14) are not exposed out of the side face of the composite floor slab;
at least one of the two longitudinal sides of the upper surface of the composite floor slab is provided with a plurality of grooves (11) which are arranged in parallel in the longitudinal direction, the grooves (11) penetrate through the middle lower part of at least one rib beam (12), and through holes (122) are formed in the parts, located under the rib beam (12), of the grooves (11).
2. The dense splicing precast concrete bidirectional composite floor slab with the ribbed beam as recited in claim 1, characterized in that: be equipped with upper and lower two-layer horizontal reinforcing bar in rib roof beam (12), every layer of horizontal reinforcing bar is 2, and upper and lower two-layer horizontal reinforcing bar is tied up together through a plurality of stirrups (15) that are parallel to each other, the cross-section of rib roof beam (12) is trapezoidal.
3. The dense splicing precast concrete bidirectional composite floor slab with the ribbed beam as recited in claim 2, characterized in that: the upper surface of the rib beam (12) is provided with a plurality of uniformly distributed rib beam grooves (121).
4. The dense splicing precast concrete bidirectional composite floor slab with the ribbed beam as recited in claim 3, characterized in that: and a plurality of longitudinal through holes (122) are arranged at the middle lower part of the rib beam (12) positioned at the middle part of the upper surface of the laminated floor slab in a penetrating way.
5. The dense splicing precast concrete bidirectional composite floor slab with the ribbed beam as recited in claim 4, characterized in that: the number of the through holes (122) in the rib beam (12) at the middle part of the upper surface of the composite floor slab is less than that of the through holes (122) in the rib beam (12) at the edge part of the upper surface of the composite floor slab.
6. The dense splicing precast concrete bidirectional composite floor slab with the ribbed beam as recited in claim 5, wherein: the upper surface of the laminated floor slab is a rough surface.
7. The dense splicing precast concrete bidirectional composite floor slab with the ribbed beam as recited in claim 6, characterized in that: when the composite floor slab is a side slab, only one of the two longitudinal sides of the upper surface of the composite floor slab is provided with a plurality of grooves (11) which are longitudinally arranged in parallel.
8. The dense splicing precast concrete bidirectional composite floor slab with the ribbed beam as recited in claim 6, characterized in that: when the composite floor slab is a middle slab, a plurality of grooves (11) which are longitudinally arranged in parallel are arranged on the two longitudinal sides of the upper surface of the composite floor slab.
9. The construction method of the densely-spliced precast concrete bidirectional composite floor slab with the ribbed beam as claimed in any one of claims 1 to 8, characterized in that: two adjacent close-spliced precast concrete bidirectional composite floor slabs are closely spliced, lap-joint reinforcing steel bars pass through holes in rib beams at the edge part of the slab body and are placed in grooves of the two adjacent close-spliced precast concrete bidirectional composite floor slabs, pre-buried electric wires pass through the through holes in the rib beams at the middle part of the slab body and the through holes in the rib beams at the edge part of the slab body, after the laying is finished, an upper reinforcing steel bar net is laid, and concrete is poured to form a cast-in-situ layer of the composite floor slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110436233.6A CN112982788A (en) | 2021-04-22 | 2021-04-22 | Close-spliced precast concrete bidirectional composite floor slab with rib beam and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110436233.6A CN112982788A (en) | 2021-04-22 | 2021-04-22 | Close-spliced precast concrete bidirectional composite floor slab with rib beam and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112982788A true CN112982788A (en) | 2021-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110436233.6A Pending CN112982788A (en) | 2021-04-22 | 2021-04-22 | Close-spliced precast concrete bidirectional composite floor slab with rib beam and construction method |
Country Status (1)
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|---|---|
| CN (1) | CN112982788A (en) |
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2021
- 2021-04-22 CN CN202110436233.6A patent/CN112982788A/en active Pending
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