CN102839773A - Concrete composite slab floorslab with shear key and prefabricated construction and construction method - Google Patents
Concrete composite slab floorslab with shear key and prefabricated construction and construction method Download PDFInfo
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- CN102839773A CN102839773A CN2012102799522A CN201210279952A CN102839773A CN 102839773 A CN102839773 A CN 102839773A CN 2012102799522 A CN2012102799522 A CN 2012102799522A CN 201210279952 A CN201210279952 A CN 201210279952A CN 102839773 A CN102839773 A CN 102839773A
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Abstract
The invention relates to the field of fabricated type concrete buildings, in particular to a concrete composite slab floorslab with a shear key, a prefabricated construction and a construction method. The produced concrete composite slab floorslab can be used as a floorslab applied in the fabricated type concrete buildings. The concrete composite slab floorslab is composed of a prefabricated reinforced concrete base plate, a prefabricated concrete shear key and a cast-in-place reinforced concrete layer. The section of the prefabricated concrete shear key is designed to be in a lying-H shape, or a ring shape, or a hexagon shape or other shapes which can play a role in shearing resistance. One end of the prefabricated concrete shear key is embedded in the prefabricated reinforced concrete base plate, and the other end of the prefabricated concrete shear key is embedded in the cast-in-place reinforced concrete layer. When the cast-in-place reinforced concrete layer is made, concrete is poured to the top portion or above the top portion of the shear key. The shear key is used to connect the prefabricated reinforced concrete base plate and the cast-in-place reinforced concrete layer to form the whole floorslab, and the prefabricated concrete shear key is used to bear a shearing force and a tensile force between the prefabricated reinforced concrete base plate and the cast-in-place reinforced concrete layer. By means of the concrete composite slab floorslab with the shear key, using amount of steel bars used to connect the prefabricated reinforced concrete base plate and the cast-in-place reinforced concrete layer can be effectively reduced, and thickness of the concrete composite slab floorslab is reduced.
Description
Technical field
The present invention relates to the assembly concrete building field, be specially a kind of concrete folding plate floor with shear key, prefabricated structure and job practices, the concrete folding plate floor of production can be used as the floor of using in the assembly concrete building.
Background technology
At present, in the concrete construction of practical set formula, the floor widespread usage be self-bearing type steel bar girder concrete folding plate.This superimposed sheet is formed (hereinafter to be referred as in-situ layer) by prefabricated reinforced concrete base plate (hereinafter to be referred as prefabricated panel) and cast-in-situ steel reinforced concrete layer; Prefabricated panel except that the normal configuration plate at the bottom of the reinforcing bar; The bending type fine steel rib truss of also joining the protruding plate face; This truss couples together the levels reinforcing bar of concrete floor, bears to make the shearing of the changing of the relative positions and the pulling force of disengaging each other each other between prefabricated panel and in-situ layer.Because prefabricated and cast-in-place part adopts the steel truss muscle to be connected, and has increased amount of reinforcement, be connected with the reliable of cast-in-place part for assurance is prefabricated simultaneously, the steel truss muscle of employing is higher, causes floor thicker, and construction costs is higher.
Summary of the invention
The purpose of this invention is to provide a kind of concrete folding plate floor, prefabricated structure and job practices, can reduce amount of reinforcement, reduce slab thickness with shear key, and with the same engineering demands of self-bearing type steel bar girder concrete folding plate floor.
For realizing above-mentioned purpose, technical scheme of the present invention is:
A kind of concrete folding plate floor with shear key, this concrete folding plate floor comprise in-situ layer and the prefabricated panel that is provided with up and down, on prefabricated panel, are provided with shear key, and prefabricated panel is connected with in-situ layer through shear key, form the strong bonded structure.
The concrete folding plate floor of described band shear key, according to shearing and pulling force that the shear key needs bear, shear key is uniformly distributed on the prefabricated panel.
The concrete folding plate floor of described band shear key, the Cross section Design of shear key be I shape, circular ring type, hexagonal or other play the shape of shearing resistance effect.
The concrete folding plate floor of described band shear key, shear key one end is embedded in the prefabricated panel, and the other end is embedded in in-situ layer.
The concrete folding plate floor of described band shear key, shear key are that plain concrete or plain concrete add vertical core muscle making, and extend upwardly to the in-situ layer end face, extend the prefabricated panel bottom surface downwards.
The prefabricated structure of the concrete folding plate floor of described band shear key; This prefabricated structure comprises presses beam, side steel form, the thick steel form in bottom surface; Reinforcing bar at the bottom of the floor plate, shear key and side steel form are set on the thick steel form in bottom surface; The side steel form is arranged on the periphery of reinforcing bar and shear key at the bottom of the floor plate, and shear key is fixed on the thick steel form in bottom surface through pressing beam.
The prefabricated structure of the concrete folding plate floor of described band shear key presses beam to adopt shaped steel to press beam, steel tube concrete soil pressure beam or other forms to press beam, presses beam to be provided with attached steel bushing, the corresponding coupling with shear key of attached steel bushing.
The prefabricated structure of the concrete folding plate floor of described band shear key, it is fixing to press the beam two ends to be connected with the thick steel form in bottom surface through set bolt.
The job practices of the concrete folding plate floor of described band shear key comprises the steps:
(1) reinforcing bar at the bottom of arranging the floor plate on the thick steel form in bottom surface;
(2) shearing and the pulling force that bear according to the shear key needs are evenly arranged in shear key on the thick steel form in bottom surface, and according to the size of prefabricated panel, the periphery of reinforcing bar and shear key is provided with the side steel form at the bottom of the floor plate;
(3) be pressed in the end face of shear key with the pressure beam, and the summit portion that makes shear key is in attached steel bushing, to prevent when the fluid concrete shear key lateral sliding;
(4) will press the end of beam to be fixed on the thick steel form in bottom surface the thickness of fluid concrete to prefabricated panel with set bolt; When making prefabricated panel, the part of shear key is embedded in the prefabricated panel, another part exposes;
When (5) concrete to be cast reaches the intensity that needs, remove set bolt, remove and press beam, form the prefabricated panel of band shear key;
(6) after the building site will be located with the prefabricated panel of shear key, arrange reinforcing bar then in the above, fluid concrete forms in-situ layer, the final superimposed sheet that forms the band shearing resistance.
The job practices of the concrete folding plate floor of described band shear key is when making in-situ layer, with the top of concrete casting to shear key or more than the top.
After adopting such scheme, the present invention has following characteristics and effect:
1. the concrete folding plate floor of band shear key of the present invention; This floor is made up of prefabricated reinforced concrete base plate (hereinafter to be referred as prefabricated panel), precast concrete shear key (hereinafter to be referred as shear key) and cast-in-situ steel reinforced concrete layer (hereinafter to be referred as in-situ layer), and the prefabricated panel of superimposed sheet floor adopts shear key to be connected with in-situ layer; The Cross section Design of shear key be I shape, circular ring type, hexagonal or other play the shape of shearing resistance effect, when making prefabricated panel, the part of shear key is embedded in the prefabricated panel, another part exposes; When making in-situ layer, with the top of concrete casting to shear key or more than the top.Like this, prefabricated panel and in-situ layer are connected into whole floor, bear shearing and pulling force between prefabricated panel and in-situ layer by shear key through shear key.
2. shear key of the present invention adds vertical core muscle by plain concrete or plain concrete to be made, and upwards can extend the in-situ layer end face, can extend the prefabricated panel bottom surface downwards, therefore can reduce amount of reinforcement, reduces thickness of slab.
Description of drawings
Fig. 1 is the precast concrete base plate plane figure behind the layout shear key of the present invention.
Fig. 2 is the sectional drawing of Fig. 1 along the A-A direction.
Fig. 3 is the sectional drawing of Fig. 1 along the B-B direction.
Fig. 4 is the schematic perspective view of shear key.
Fig. 5 is the superimposed sheet plan view that forms behind the fluid concrete on the precast concrete base plate after arranging shear key.
Fig. 6 is the sectional drawing of Fig. 5 along the C-C direction.
Fig. 7 is the sectional drawing of Fig. 5 along the D-D direction.
Fig. 8 is the plan view of arranging on the shear key of Fig. 1 behind the steel tube concrete soil pressure beam.
Fig. 9 is a steel tube concrete soil pressure beam sectional drawing along its length.
Among the figure, 1. shear key (precast concrete shear key); 2. prefabricated panel; 3. in-situ layer; 4. set bolt; 5. pressure beam; 6. side steel form; 7. the thick steel form in bottom surface; 8. attached steel bushing.
The specific embodiment
Shown in Fig. 1-4, the present invention is provided with shear key 1 on prefabricated panel 2, and according to shearing and pulling force that shear key 1 needs bear, shear key 1 is uniformly distributed on the prefabricated panel 2.Wherein, the Cross section Design of shear key 1 is I shape (Fig. 2-4); Perhaps, shear key 1 can be circular ring type, hexagonal or other shapes.
Shown in Fig. 5-7, the concrete folding plate floor of band shear key of the present invention mainly comprises the in-situ layer 3 and prefabricated panel 2 that are provided with up and down, and prefabricated panel 2 is provided with shear key 1, and prefabricated panel 2 is connected with in-situ layer 3 through shear key 1, forms the strong bonded structure.Shear key 1 one ends are embedded in the prefabricated panel, and the other end is embedded in in-situ layer.
Shown in Fig. 8-9; The prefabricated structure of the concrete folding plate floor of band shear key of the present invention; Mainly comprise set bolt 4, press beam 5, the thick steel form of side steel form 6, bottom surface 7, attached steel bushing 8 etc.; Concrete structure is following: reinforcing bar at the bottom of the floor plate, shear key 1 and side steel form 6 are set on the thick steel form 7 in bottom surface, and side steel form 6 is arranged on the periphery of reinforcing bar and shear key 1 at the bottom of the floor plate, and shear key 1 is through pressing beam 5 fixing; Press beam 5 to be provided with attached steel bushing 8 (Fig. 9), attached steel bushing 8 and shear key 1 corresponding coupling, it is fixing to press beam 5 two ends to be connected with the thick steel form 7 in bottom surface through set bolt 4.
Among the present invention, press the material and the shape of beam unrestricted.In the present embodiment, press beam can adopt steel tube concrete soil pressure beam, through of firm being connected of steel tube concrete soil pressure beam with the thick steel form 7 in bottom surface, can be preferably fixing shear key position.
Shown in Fig. 8-9, the job practices of the concrete folding plate floor of band shear key of the present invention is following:
(1) reinforcing bar at the bottom of arranging the floor plate on the thick steel form 7 in bottom surface;
(2) shearing and the pulling force that bear according to the shear key needs are evenly arranged in shear key 1 on the thick steel form 7 in bottom surface, and according to the size of prefabricated panel 2, the periphery of reinforcing bar and shear key 1 is provided with side steel form 6 at the bottom of the floor plate;
(3) with pressing beam 5 to be pressed in the end face of shear key 1, and the summit portion that makes shear key 1 is in attached steel bushing 8, to prevent when the fluid concrete shear key 1 lateral sliding;
(4) will press the end of beam 5 to be fixed on the thick steel form 7 in bottom surface the thickness of fluid concrete to prefabricated panel 2 with set bolt 4; When making prefabricated panel, the part of shear key is embedded in the prefabricated panel, another part exposes;
When (5) concrete to be cast reaches the intensity that needs, remove set bolt 4, remove and press beam 5, form the prefabricated panel 2 of band shear key shown in Figure 1;
(6) after the building site will be located with the prefabricated panel of shear key, arrange reinforcing bar then in the above, fluid concrete forms in-situ layer 3, and the final superimposed sheet that forms the band shearing resistance is as shown in Figure 5.
When making in-situ layer, with the top of concrete casting to shear key or more than the top.That is to say that shear key can be selected to reveal the top or not reveal the top as required.
Embodiment result shows; The concrete folding plate floor of band shear key of the present invention, prefabricated structure and job practices; Through shear key precast concrete base plate and cast-in-situ concrete layer are connected into whole floor, bear shearing and pulling force between the two by the anti-shear concrete key.This superimposed sheet floor can effectively reduce the amount of reinforcement that connects prefabricated reinforced concrete base plate and cast-in-situ concrete layer, reduces the thickness of slab of superimposed sheet floor.
Claims (10)
1. concrete folding plate floor with shear key; It is characterized in that: this concrete folding plate floor comprises in-situ layer and the prefabricated panel that is provided with up and down; On prefabricated panel, be provided with shear key, prefabricated panel is connected with in-situ layer through shear key, forms the strong bonded structure.
2. according to the concrete folding plate floor of the described band shear key of claim 1, it is characterized in that: according to shearing and pulling force that the shear key needs bear, shear key is uniformly distributed on the prefabricated panel.
3. according to the concrete folding plate floor of the described band shear key of claim 1, it is characterized in that: the Cross section Design of shear key be I shape, circular ring type, hexagonal or other play the shape of shearing resistance effect.
4. according to the concrete folding plate floor of the described band shear key of claim 1, it is characterized in that: shear key one end is embedded in the prefabricated panel, and the other end is embedded in in-situ layer.
5. according to the concrete folding plate floor of the described band shear key of claim 1, it is characterized in that: shear key is that plain concrete or plain concrete add vertical core muscle making, and extends upwardly to the in-situ layer end face, extends the prefabricated panel bottom surface downwards.
6. according to the prefabricated structure of the concrete folding plate floor of the described band shear key of claim 1; It is characterized in that: this prefabricated structure comprises presses beam, side steel form, the thick steel form in bottom surface; Reinforcing bar at the bottom of the floor plate, shear key and side steel form are set on the thick steel form in bottom surface; The side steel form is arranged on the periphery of reinforcing bar and shear key at the bottom of the floor plate, and shear key is fixed on the thick steel form in bottom surface through pressing beam.
7. according to the prefabricated structure of the concrete folding plate floor of the described band shear key of claim 6; It is characterized in that: press beam to adopt steel tube concrete soil pressure beam, shaped steel to press beam or other forms to press beam; Press beam to be provided with attached steel bushing, the corresponding coupling of attached steel bushing with shear key.
8. according to the prefabricated structure of the concrete folding plate floor of the described band shear key of claim 6, it is characterized in that: press the beam two ends to be connected with the thick steel form in bottom surface and fix through set bolt.
9. according to the job practices of the concrete folding plate floor of the described band shear key of one of claim 1-8, it is characterized in that, comprise the steps:
(1) reinforcing bar at the bottom of arranging the floor plate on the thick steel form in bottom surface;
(2) shearing and the pulling force that bear according to the shear key needs are evenly arranged in shear key on the thick steel form in bottom surface, and according to the size of prefabricated panel, the periphery of reinforcing bar and shear key is provided with the side steel form at the bottom of the floor plate;
(3) be pressed in the end face of shear key with the pressure beam, and the summit portion that makes shear key is in attached steel bushing, to prevent when the fluid concrete shear key lateral sliding;
(4) will press the end of beam to be fixed on the thick steel form in bottom surface the thickness of fluid concrete to prefabricated panel with set bolt; When making prefabricated panel, the part of shear key is embedded in the prefabricated panel, another part exposes;
When (5) concrete to be cast reaches the intensity that needs, remove set bolt, remove and press beam, form the prefabricated panel of band shear key;
(6) after the building site will be located with the prefabricated panel of shear key, arrange reinforcing bar then in the above, fluid concrete forms in-situ layer, the final superimposed sheet that forms the band shearing resistance.
10. according to the job practices of the concrete folding plate floor of the described band shear key of claim 9, it is characterized in that, when making in-situ layer, with the top of concrete casting to shear key or more than the top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210279952.2A CN102839773B (en) | 2012-08-08 | 2012-08-08 | Concrete composite slab floorslab with shear key and prefabricated construction and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210279952.2A CN102839773B (en) | 2012-08-08 | 2012-08-08 | Concrete composite slab floorslab with shear key and prefabricated construction and construction method |
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| CN102839773A true CN102839773A (en) | 2012-12-26 |
| CN102839773B CN102839773B (en) | 2014-09-24 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107700728A (en) * | 2017-09-30 | 2018-02-16 | 沈阳建筑大学 | Easy connect band shear key reinforced concrete slab structure and connection method |
| CN107972173A (en) * | 2017-12-01 | 2018-05-01 | 沈阳建筑大学 | Regeneration concrete precast floor slab structure and production method |
| CN108018972A (en) * | 2017-12-01 | 2018-05-11 | 沈阳建筑大学 | Full precast floor slab and laminated floor slab combining structure, making and assembly method |
| CN109083320A (en) * | 2018-09-26 | 2018-12-25 | 重庆普珞沃建筑科技有限公司 | Combine prefabricated panel and laminated floor slab structure and laminated floor slab construction method |
| EP3486392A1 (en) | 2018-03-12 | 2019-05-22 | Elastic Potential S.L. | Prefabricated floor element, structure comprising prefabricated floor elements and installation for obtaining the prefabricated floor element |
| CN111980256A (en) * | 2020-08-17 | 2020-11-24 | 浙江大学建筑设计研究院有限公司 | Self-insulation composite floor slab and construction method thereof |
| CN112282163A (en) * | 2019-07-25 | 2021-01-29 | 沈阳建筑大学 | Heat-preservation integrated composite floor slab and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107700728A (en) * | 2017-09-30 | 2018-02-16 | 沈阳建筑大学 | Easy connect band shear key reinforced concrete slab structure and connection method |
| CN107972173A (en) * | 2017-12-01 | 2018-05-01 | 沈阳建筑大学 | Regeneration concrete precast floor slab structure and production method |
| CN108018972A (en) * | 2017-12-01 | 2018-05-11 | 沈阳建筑大学 | Full precast floor slab and laminated floor slab combining structure, making and assembly method |
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| CN109083320A (en) * | 2018-09-26 | 2018-12-25 | 重庆普珞沃建筑科技有限公司 | Combine prefabricated panel and laminated floor slab structure and laminated floor slab construction method |
| CN112282163A (en) * | 2019-07-25 | 2021-01-29 | 沈阳建筑大学 | Heat-preservation integrated composite floor slab and preparation method thereof |
| CN111980256A (en) * | 2020-08-17 | 2020-11-24 | 浙江大学建筑设计研究院有限公司 | Self-insulation composite floor slab and construction method thereof |
| CN111980256B (en) * | 2020-08-17 | 2021-08-24 | 浙江大学建筑设计研究院有限公司 | Self-insulation composite floor slab and construction method thereof |
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| CN102839773B (en) | 2014-09-24 |
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