CN112360028A - Steel grating support-free superposed dense rib plate - Google Patents
Steel grating support-free superposed dense rib plate Download PDFInfo
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- CN112360028A CN112360028A CN202011293502.XA CN202011293502A CN112360028A CN 112360028 A CN112360028 A CN 112360028A CN 202011293502 A CN202011293502 A CN 202011293502A CN 112360028 A CN112360028 A CN 112360028A
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- bottom die
- steel
- floor
- reinforcing steel
- steel bars
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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
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a steel grating support-free superposed dense rib plate, wherein a floor slab bottom die of the dense rib plate adopts a suspension structure and is formed by splicing a plurality of prefabricated strip-shaped units which are parallel along the transverse direction and extend along the longitudinal direction, each prefabricated strip-shaped unit comprises a bottom die unit and sheet-shaped steel gratings which are fixed on two sides of the bottom die unit in a side-standing manner, and the bottom die unit comprises a plurality of buckled square formworks; during construction, hoisting all the prefabricated strip-shaped units to a roof and completing splicing; after splicing, binding transverse rib beam reinforcing steel bars, connecting all longitudinal rib beam reinforcing steel bars together by the transverse rib beam reinforcing steel bars, then binding floor slab distribution reinforcing steel bars on a floor slab bottom die, and pouring concrete on the floor slab bottom die to form the bidirectional stressed concrete dense rib plate. The invention can apply the ribbed floor in the fabricated building, which can greatly improve the construction efficiency and quality and save the construction cost.
Description
Technical Field
The invention belongs to the field of constructional engineering, and particularly relates to a support-free superposed dense rib plate for a steel grating.
Background
In recent years, as the prefabricated building is developed, the prefabricated building is in a new period of rapid development. The prefabrication of conventional floor slabs is common, but the dense rib slabs are limited by the technology and are not well combined with fabricated buildings. In order to promote the further development of the fabricated building, the ribbed floor slabs need to be popularized and used in the fabricated building.
Disclosure of Invention
The invention provides a support-free overlapped dense rib plate for a steel grid of an assembled building, which aims to solve the technical problems in the prior art.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows: a steel grating support-free superposed dense rib plate is characterized in that a floor slab bottom die of the dense rib plate is of a suspension structure and is formed by splicing a plurality of prefabricated strip-shaped units which are parallel in the transverse direction and extend in the longitudinal direction, each prefabricated strip-shaped unit comprises a bottom die unit and sheet-shaped steel gratings which are fixed on two sides of the bottom die unit in a side-standing manner, each bottom die unit comprises a plurality of buckled square formworks, the four edges of the bottoms of the square formworks are provided with outward flanges, the square formworks are arranged in the longitudinal direction and are spliced and fixed together, two ends and the tops of the sheet-shaped steel gratings protrude out of the bottom die unit, and the bottoms of the sheet-; during construction, hoisting all prefabricated strip-shaped units to a roof and completing splicing, after splicing is completed, connecting two sheet-shaped steel gratings which are opposite face to form longitudinal rib beam reinforcing steel bars, fixing two ends of each longitudinal rib beam reinforcing steel bar on a side beam to serve as a supporting fixed end of a floor slab, hanging bottom die units between two adjacent longitudinal rib beam reinforcing steel bars, splicing all bottom die units into a floor slab bottom die, and forming a plurality of transverse rib beam reinforcing steel bar caulking grooves which are communicated along the transverse direction on the floor slab bottom die; after splicing is completed, transverse rib beam reinforcing steel bars are bound in the transverse rib beam reinforcing steel bar caulking grooves, the transverse rib beam reinforcing steel bars connect all the longitudinal rib beam reinforcing steel bars together, then floor distribution reinforcing steel bars are bound on the floor bottom die, cushion blocks are arranged between the longitudinal rib beam reinforcing steel bars and the floor bottom die, between the transverse rib beam reinforcing steel bars and the floor bottom die and between the floor distribution reinforcing steel bars and the floor bottom die, then concrete is poured on the floor bottom die to form the bidirectional stressed concrete dense rib plate.
The fixed connection structure between the sheet steel grating and the bottom die unit adopts a detachable connection structure.
The sheet steel grating is made of open-pore section steel.
The sheet steel grating is made of open-hole H-shaped steel.
The steel sheet grating is made of plane steel bar trusses.
The square formwork is any one of a plastic formwork, a glass fiber reinforced plastic formwork, a metal formwork and a GRC film casing.
Two adjacent square formworks are connected through bolts or buckles.
The prefabricated strip-shaped units adopt standardized design sizes.
The invention has the advantages and positive effects that: the suspended floor bottom die is spliced on site by adopting the prefabricated strip units, then transverse rib beam reinforcing steel bars, floor distribution reinforcing steel bars and concrete are bound on the floor bottom die in sequence to form the multi-ribbed floor with integral bidirectional stress characteristic, so that the multi-ribbed floor can be applied to an assembly type building. Because the floor bottom die is prefabricated in a factory, the construction efficiency and the construction quality can be greatly improved, meanwhile, the floor bottom die adopts a suspension structure and adopts a support-free system, the floor bottom die can not be supported, and the support cost can be saved while the work efficiency is improved.
Drawings
FIG. 1 is a schematic structural view of example 1 of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a cross-sectional view of FIG. 1;
fig. 4 is a schematic structural diagram of a prefabricated strip unit in embodiment 1 of the present invention;
FIG. 5 is a schematic structural view of example 2 of the present invention;
FIG. 6 is a top view of FIG. 5;
FIG. 7 is a cross-sectional view of FIG. 5;
fig. 8 is a schematic structural diagram of a prefabricated strip unit in embodiment 2 of the present invention.
In the figure: 1. a floor bottom die; 1-1, a bottom die unit; 1-1-1, square mould shell; 2. longitudinal rib beam reinforcing steel bars; 2-1, a plane steel bar truss; 2-2, opening H-shaped steel; 3. and transverse rib beam reinforcing steel bars.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
referring to fig. 1 to 8, a steel grating support-free overlapped dense rib plate, a floor slab bottom die of the dense rib plate is of a suspension structure and is formed by splicing a plurality of prefabricated strip units which are parallel in the transverse direction and extend in the longitudinal direction, each prefabricated strip unit comprises a bottom die unit 1-1 and sheet steel gratings which are fixed on two sides of the bottom die unit 1-1 in a side-standing manner, the bottom die unit 1-1 comprises a plurality of buckled square formworks 1-1-1, the four sides of the bottom of each square formwork 1-1 are provided with flanging edges, the square formworks are arranged in the longitudinal direction and spliced together, two ends and the top of each sheet steel grating protrude out of the bottom die unit, and the bottom of each sheet steel grating is arranged above the flanging edge of each square formwork.
During construction, all prefabricated strip-shaped units are hoisted to a roof and spliced, after splicing is completed, two opposite sheet-shaped steel gratings face to face are connected to form longitudinal rib beam steel bars 2, two ends of each longitudinal rib beam steel bar 2 are fixed to side beams and serve as supporting fixed ends of a floor, bottom die units 1-1 are hung between every two adjacent longitudinal rib beam steel bars 2, all the bottom die units 1-1 are spliced into a floor bottom die 1, and a plurality of transverse rib beam steel bar caulking grooves which are transversely communicated are formed in the floor bottom die 1.
After splicing is completed, transverse rib beam reinforcing steel bars 3 are bound in the transverse rib beam reinforcing steel bar caulking grooves, the transverse rib beam reinforcing steel bars 3 connect all longitudinal rib beam reinforcing steel bars 2 together, then floor distribution reinforcing steel bars are bound on the floor bottom die 1, cushion blocks are arranged between the longitudinal rib beam reinforcing steel bars 2 and the floor bottom die 1, between the transverse rib beam reinforcing steel bars 3 and the floor bottom die 1 and between the floor distribution reinforcing steel bars and the floor bottom die 1, then concrete is poured on the floor bottom die 1, and the longitudinal rib beam reinforcing steel bars 2, the transverse rib beam reinforcing steel bars 3 and the floor distribution reinforcing steel bars are poured in the concrete to form the bidirectional stressed concrete ribbed slab.
The floor bottom die 1 of the steel grating support-free superposed ribbed slab is suspended by longitudinal rib beam steel bars formed by sheet steel gratings, the lateral rigidity of the longitudinal rib beam steel bars is high, the longitudinal rib beam steel bars are not easy to generate flexural deformation, and no support or a small amount of temporary support can be arranged during construction; the floor bottom die 1 is spliced by adopting strip units prefabricated in a factory, so that the construction efficiency and the construction quality can be greatly improved, and the ribbed floor can be applied to an assembly type building.
The floor bottom die 1 can be used as a component of the ribbed slab and can also be detached, depending on the structural design. When the floor bottom die 1 needs to be removed in the multi-ribbed plate structure, the fixed connection structure between the sheet steel grating and the bottom die unit 1-1 adopts a detachable connection structure, such as bolt connection, so that the floor bottom die 1 is convenient to remove.
The square formwork 1-1-1 adopts a finished formwork with standard size, and can adopt any one of a reusable plastic formwork, a disposable non-dismantling mould glass steel formwork, a metal formwork and a GRC film casing, but the material of the square formwork 1-1-1 is not limited to the above-mentioned ones, and a finished formwork of other materials can also be adopted. The adjacent two square formworks 1-1-1 are connected through bolts or buckles to ensure that the connection part of the bottom die of the floor slab is firm and tight, so as to ensure the connection safety and the integrity of the bottom die, and achieve the effects of facilitating the site construction and avoiding slurry leakage. And the prefabricated strip-shaped units are recommended to adopt standardized design sizes, so that the mass production is facilitated.
In example 1, the steel sheet grating is made of a planar steel bar truss 2-1. The two ends of the longitudinal rib beam steel bars extend out of the edge of the bottom formwork for at least 5d, d is the diameter of the steel bars so as to be conveniently connected with the edge beam, and the section size of the longitudinal ribs is determined according to strength calculation. The stress of the longitudinal rib beam steel bars is calculated according to the following two stages:
in the first stage, namely before the cast-in-place concrete reaches the designed strength value, the load is borne by the longitudinal rib beam steel bars, and the load comprises the dead weight of a formwork, the dead weight of a reinforced concrete material and the construction live load in the stage; and in the second stage, namely the stage after the post-cast concrete reaches the strength value specified by the design, the ribbed floor slab is calculated according to the whole bidirectional plate, and the load comprises the dead weight of the ribbed floor slab, the dead weight of a surface layer, a suspended ceiling and the like and the larger value of the construction live load in the stage and the variable load in the trial stage.
In example 2, the sheet steel grating was made of open-cell steel sections. More specifically, the sheet steel grating is made of open-cell H-section steel 2-2.
The strip units are prefabricated parts of a factory, and each strip unit comprises a bottom die unit 1-1 and steel gratings fixedly connected to two sides of the bottom die unit 1-1. During construction, after splicing of the strip-shaped units is completed on site, binding of transverse rib beam reinforcing steel bars, laying of floor slab distribution reinforcing steel bars and concrete cast-in-place are sequentially carried out, and after concrete is solidified and formed, a floor slab bottom die is detached to form an integral bidirectional stressed concrete dense rib plate. According to actual needs, the bottom die is not disassembled, so that the bottom die becomes a component of the rib plate.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (8)
1. A steel grating support-free superposed dense rib plate is characterized in that a floor slab bottom die of the dense rib plate is of a suspension structure and is formed by splicing a plurality of prefabricated strip-shaped units which are parallel in the transverse direction and extend in the longitudinal direction, each prefabricated strip-shaped unit comprises a bottom die unit and sheet-shaped steel gratings which are fixed on two sides of the bottom die unit in a side-standing manner, each bottom die unit comprises a plurality of buckled square formworks, the four edges of the bottoms of the square formworks are provided with outward turned edges, the square formworks are arranged in the longitudinal direction and are spliced and fixed together, two ends and the tops of the sheet-shaped steel gratings protrude out of the bottom die unit, and the bottoms of the sheet-shaped steel gratings;
during construction, hoisting all prefabricated strip-shaped units to a roof and completing splicing, after splicing is completed, connecting two sheet-shaped steel gratings which are opposite face to form longitudinal rib beam reinforcing steel bars, fixing two ends of each longitudinal rib beam reinforcing steel bar on a side beam to serve as a supporting fixed end of a floor slab, hanging bottom die units between two adjacent longitudinal rib beam reinforcing steel bars, splicing all bottom die units into a floor slab bottom die, and forming a plurality of transverse rib beam reinforcing steel bar caulking grooves which are communicated along the transverse direction on the floor slab bottom die;
after splicing is completed, transverse rib beam reinforcing steel bars are bound in the transverse rib beam reinforcing steel bar caulking grooves, the transverse rib beam reinforcing steel bars connect all the longitudinal rib beam reinforcing steel bars together, then floor distribution reinforcing steel bars are bound on the floor bottom die, cushion blocks are arranged between the longitudinal rib beam reinforcing steel bars and the floor bottom die, between the transverse rib beam reinforcing steel bars and the floor bottom die and between the floor distribution reinforcing steel bars and the floor bottom die, then concrete is poured on the floor bottom die to form the bidirectional stressed concrete dense rib plate.
2. The steel grating support-free overlapped dense rib plate as claimed in claim 1, wherein the fixed connection structure between the sheet steel grating and the bottom die unit is a detachable connection structure.
3. A steel grid bracing-free laminated dense rib plate according to claim 1, wherein the sheet steel grid is made of open-cell steel sections.
4. A steel grid bracing-free laminated dense floor according to claim 3, wherein the sheet steel grid is made of open-celled H-section steel.
5. A steel grid bracing-free laminated dense floor according to claim 1, wherein the steel grid in sheet form is made of planar steel trusses.
6. The steel grid bracing-free overlapped dense rib plate according to claim 1, wherein the square formwork is any one of a plastic formwork, a glass steel formwork, a metal formwork and a GRC film casing.
7. A steel grating support-free overlapped dense rib plate according to claim 1, wherein two adjacent square formworks are connected by bolts or buckles.
8. A steel grating support-free superimposed dense rib plate according to claim 1, wherein the prefabricated bar-shaped units are of standardized design dimensions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011293502.XA CN112360028A (en) | 2020-11-18 | 2020-11-18 | Steel grating support-free superposed dense rib plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011293502.XA CN112360028A (en) | 2020-11-18 | 2020-11-18 | Steel grating support-free superposed dense rib plate |
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| CN112360028A true CN112360028A (en) | 2021-02-12 |
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| CN202011293502.XA Pending CN112360028A (en) | 2020-11-18 | 2020-11-18 | Steel grating support-free superposed dense rib plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107193A (en) * | 2021-03-31 | 2021-07-13 | 江西美丽坚建材科技有限公司 | Prefabricated assembled ribbed floor beam bottom die |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0494061A1 (en) * | 1991-01-03 | 1992-07-08 | José Antonio Sainz de la Maza del Castillo | A method and elements for assembling a non-recoverable formwork |
| CN2490246Y (en) * | 2001-08-10 | 2002-05-08 | 李佩勋 | Prestressed concrete floor with dense ribs |
| CN1779116A (en) * | 2004-11-24 | 2006-05-31 | 邱则有 | Hollow slab |
| CN202577703U (en) * | 2012-05-14 | 2012-12-05 | 天津住宅集团建设工程总承包有限公司 | Ribbed cast-in-place concrete floor |
| CN207525960U (en) * | 2017-09-30 | 2018-06-22 | 沈阳建筑大学 | Easy connect band shear key reinforced concrete slab structure |
| CN109025017A (en) * | 2018-08-17 | 2018-12-18 | 大连三川建设集团股份有限公司 | Reinforced concrete hollow overlaps two-way ribbed slab floor and its method of construction |
| CN111622403A (en) * | 2020-05-22 | 2020-09-04 | 江苏科技大学 | Cold-formed thin-wall section steel composite floor and modular prefabrication and assembly method thereof |
| CN111779170A (en) * | 2020-06-24 | 2020-10-16 | 天津洪晟基业建材有限公司 | Dense rib support-free unit template device and installation method |
-
2020
- 2020-11-18 CN CN202011293502.XA patent/CN112360028A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0494061A1 (en) * | 1991-01-03 | 1992-07-08 | José Antonio Sainz de la Maza del Castillo | A method and elements for assembling a non-recoverable formwork |
| CN2490246Y (en) * | 2001-08-10 | 2002-05-08 | 李佩勋 | Prestressed concrete floor with dense ribs |
| CN1779116A (en) * | 2004-11-24 | 2006-05-31 | 邱则有 | Hollow slab |
| CN202577703U (en) * | 2012-05-14 | 2012-12-05 | 天津住宅集团建设工程总承包有限公司 | Ribbed cast-in-place concrete floor |
| CN207525960U (en) * | 2017-09-30 | 2018-06-22 | 沈阳建筑大学 | Easy connect band shear key reinforced concrete slab structure |
| CN109025017A (en) * | 2018-08-17 | 2018-12-18 | 大连三川建设集团股份有限公司 | Reinforced concrete hollow overlaps two-way ribbed slab floor and its method of construction |
| CN111622403A (en) * | 2020-05-22 | 2020-09-04 | 江苏科技大学 | Cold-formed thin-wall section steel composite floor and modular prefabrication and assembly method thereof |
| CN111779170A (en) * | 2020-06-24 | 2020-10-16 | 天津洪晟基业建材有限公司 | Dense rib support-free unit template device and installation method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107193A (en) * | 2021-03-31 | 2021-07-13 | 江西美丽坚建材科技有限公司 | Prefabricated assembled ribbed floor beam bottom die |
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Application publication date: 20210212 |