CN209384483U - A kind of two dimension prestressing prefabricated reinforced concrete cassette ceiling - Google Patents
A kind of two dimension prestressing prefabricated reinforced concrete cassette ceiling Download PDFInfo
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- CN209384483U CN209384483U CN201821921566.8U CN201821921566U CN209384483U CN 209384483 U CN209384483 U CN 209384483U CN 201821921566 U CN201821921566 U CN 201821921566U CN 209384483 U CN209384483 U CN 209384483U
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- cassette ceiling
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Abstract
The utility model relates to a kind of concrete hollow floor, especially a kind of two dimension prestressing prefabricated reinforced concrete cassette ceiling belongs to building engineering field.A kind of two dimension prestressing prefabricated reinforced concrete cassette ceiling, floor form for concrete placings, and the cassette ceiling includes plate face distributing bar, board bottom deformed bar and elongated hollow cavity；Plate face distributing bar is distributed in the vertical and horizontal of cassette ceiling upper face；Board bottom deformed bar is distributed in the vertical and horizontal of cassette ceiling base surface；Elongated hollow cavity is set to the vertical or horizontal middle part of cassette ceiling, is implanted into slide core rib in elongated hollow cavity, the shape of the slide core rib is matched with elongated hollow cavity.The utility model has the advantages that 1, increases cassette ceiling structural seismic performance in engineering use.2, the relative displacement generated between plate by shrinkage stress is effectively controlled.3, the lateral stiffness of plate is significantly enhanced.4, the member dead weight greater than 20% can be reduced, the amount of reinforcement greater than 20% is saved.
Description
Technical field
The utility model relates to a kind of concrete hollow floor, especially a kind of two dimension prestressing prefabricated reinforced concrete is empty
Heart floor, belongs to building engineering field.
Background technique
Prestressed concrete technology has been applied for many years in China, and prestressed concrete can give full play to reinforcing bar and concrete is each
From characteristic, the rigidity, crack resistance and durability of reinforced concrete member can be improved, high strength cast iron and height can be effectively utilized
The concrete of strength grade.Prestressing force prefabricated reinforced concrete cassette ceiling is widely used: being suitable for large span office building, religion
Learn building, exhibit halls, parking building, workshop, warehouse etc.；It can reduce dead load simultaneously, reduce vertical supporting and key dimension, obtain
Obtain good sound insulation, heat insulation.However, traditional prestressing force prefabricated reinforced concrete cassette ceiling, in engineering use often
It is commonly present in engineering structure overall performance difference after poor seismic behavior and assembly and causes a lot of occurred between plate significantly logical
It to mass defects such as cracks, not only seriously affects using function, but also there are security risks.
Utility model content
The purpose of this utility model is to solve problems of the prior art, provides a kind of anti-seismic performance height, simultaneously also
The two dimension prestressing prefabricated reinforced concrete cassette ceiling that member dead weight can be reduced, save amount of reinforcement.
To achieve the goals above, the utility model adopts the following technical solution: a kind of two dimension prestressing is precast reinforced mixed
Solidifying soil cassette ceiling, floor form for concrete placings, and the cassette ceiling includes plate face distributing bar, board bottom deformed bar and leads to
Long hollow cavity；Plate face distributing bar is distributed in the vertical and horizontal of cassette ceiling upper face；Board bottom deformed bar is distributed in sky
The vertical and horizontal in heart floor soleplate face；Elongated hollow cavity is set to the vertical or horizontal middle part of cassette ceiling, elongated hollow
Intracavitary implantation slide core rib, the shape of the slide core rib are matched with elongated hollow cavity.
Preferably, plate face distributing bar, board bottom deformed bar and elongated hollow cavity are multiple distributions.
Preferably, elongated hollow cavity is set to the longitudinal middle part of cassette ceiling, the middle line and board bottom of adjacent elongated hollow cavity
The axis of longitudinal prestressing reinforcing bar is overlapped.
Preferably, the middle line of slide core rib passes through the center of circle of board bottom transverse prestressed reinforcing steel bar.
It further, further include position-limiting hole, the angle of position-limiting hole and elongated hollow cavity is in 90o, is set to hollow building
On plate between adjacent elongated hollow cavity, fixed for later period installation.
Preferably, the slide core rib is multiple and series arrangement in elongated hollow cavity.
Preferably, the cross sectional shape of the slide core rib is the abnormity such as circle, ellipse, jujube shape, square or rectangular
Hole.
Preferably, prefabricated waterproof layer, insulating layer can be distinguished according to requirement of engineering in the upper face of cassette ceiling, base surface
Deng.
Its principle is: 1, strengthening cassette ceiling by being implanted into slide core rib in elongated hollow cavity in lateral part
The area in lateral normal section concrete compression area increases the lateral stressed property of integral slab to improve the intensity of compressive region
Energy.2, so that muti-piece cassette ceiling is formed a continuous entirety, by transverse prestress post-stretching, effectively overcome hollow building
Temperature stress between plate and cassette ceiling is eliminated and is led between the cassette ceiling of traditional method and cassette ceiling because expanding with heat and contract with cold
The crack of cause.
A kind of method I preparing two dimension prestressing prefabricated reinforced concrete cassette ceiling as described above, comprising the following steps:
(1) shaper is made, longitudinally opposed side opens up several hollow aperture D；
(2) two-way slab surface construction reinforcing bar, board bottom deformed bar in length and breadth are set in shaper, and outer diameter D is laid at middle part
Elongated open circles core barrel lays the round core pipe of position-limiting hole for preventing plate to be displaced between adjacent elongated open circles core barrel；
(3) concrete is poured into mold, and vibration compacting, surface receive light；
(4) mold is removed, extracts elongated open circles core barrel out, forms longitudinal elongated hollow cavity in concrete plate；Extract limit hole out
The round core pipe in hole forms position-limiting hole；
(5) by the prefabricated longitudinal elongated hollow cavity of slide core rib push-in.
A kind of method II preparing two dimension prestressing prefabricated reinforced concrete cassette ceiling as described above, including following step
It is rapid:
(1) shaper is made, longitudinally opposed side opens up several hollow aperture D；
(2) longitudinal plate bottom deformed bar is set in shaper, lays and is used for mounting plate bottom horizontal deformed bar
Round core pipe, middle part lay the elongated open circles core barrel of outer diameter D, setting prevent plate be displaced the round core pipe of position-limiting hole；
(3) concrete is poured into mold, and vibration compacting, surface receive light；
(4) mold is removed, extracts the round core pipe of board bottom transverse prestressed reinforcing steel bar out, it is logical to form board bottom transverse prestressed reinforcing steel bar
Long reserving hole；It extracts elongated open circles core barrel out, forms longitudinal elongated hollow cavity in concrete plate；Extract the round core of position-limiting hole out
Pipe forms position-limiting hole；
(5) board bottom transverse prestressed reinforcing steel bar is inserted into the elongated reserving hole of board bottom transverse prestressed reinforcing steel bar and applies prestressing force
Post-stretching；
(6) by the prefabricated longitudinal elongated hollow cavity of slide core rib push-in.
Preferably, the cross sectional shape of the shaper is rectangle or T-type.
It should be noted that method I is pre-tensioning system, method II is post stretching, and the two is that two dimension prestressing is precast reinforced
The preparation method of concrete hollow floor, the cross sectional shape of shaper are rectangle, are suitable for ordinary circumstance；Shaper is cut
Face shape is T-type, can meet high-strength flat beams and do no beam (concealed beam) structure.
Principle: by being implanted into and chamber cross-sectional geometry size in the elongated hollow cavity in cassette ceiling by design spacing
Almost consistent concrete slide core rib has its increase in work on the basis of not influencing cassette ceiling check configuration performance
Lateral stressed structural condition in journey use；Pass through transverse direction pre-set in cassette ceiling forming process duct again
In, muti-piece (two pieces or more) is implanted into unidirectional prestressing force prefabricated hollow floor high tensile reinforcement or high-strength steel after core model with condition
Twisted wire gangs up connection, and imposes on prestressing force, makes one piece of complete two dimension prestressing floor.Except use post-tensioning is laterally answered in advance
The connection of power reinforcing bar is outer, can also be before pouring concrete, and each transverse prestressed reinforcing steel bar hole site every piece of cassette ceiling two sides is prefabricated
Steel plate is simultaneously connected by reinforcing bar to drawing, and deformed bar hole is symmetrically reserved in prefabricated steel, after-pouring concrete；It is pre- by welding again
Steel plate processed and prefabricated steel and plurality of plates is formed into entirety.
The utility model compared with prior art, has the advantages that
1, cassette ceiling structural seismic performance in engineering use is increased.
2, the transverse prestress tensioning applied effectively controls the relative displacement generated between plate by shrinkage stress, reaches
Overcome the common quality defect of straight joint between plate.
3, not only increase lateral tensile prestress reinforcing bar in board bottom, while hollow part adds increasing concrete slide core rib also in plate,
It is worked together with board bottom transversely prestressed bars and forms transverse bending strength, significantly enhance the lateral stiffness of plate.
4, the member dead weight greater than 20% can be reduced, the amount of reinforcement greater than 20% is saved.
Detailed description of the invention
Fig. 1 is 1 structural schematic diagram a of the utility model embodiment；
Fig. 2 is Fig. 1 longitdinal cross-section diagram；
Fig. 3 is Fig. 1 view in transverse section；
Fig. 4 is longitdinal cross-section diagram of the Fig. 1 in engineering use；
Fig. 5 is 1 structural schematic diagram b of the utility model embodiment；
Fig. 6 is 2 structural schematic diagram a of the utility model embodiment；
Fig. 7 is 2 structural schematic diagram b of the utility model embodiment；
In figure, 1, plate face distributing bar；2, board bottom longitudinal prestressing reinforcing bar；3, board bottom transverse prestressed reinforcing steel bar；4, elongated
Hollow cavity；5, slide core rib；6, position-limiting hole；7, waterproof layer；8, insulating layer；9, the elongated preformed hole of board bottom transverse prestressed reinforcing steel bar
Hole.
Specific embodiment
It should be noted that identical structure is using identical number mark in following embodiments 1 and embodiment 2.Under
Face is further described the utility model in conjunction with attached drawing:
Embodiment 1
As shown in Figure 1, a kind of two dimension prestressing prefabricated reinforced concrete cassette ceiling, floor is square made of concrete placings
Shape, cassette ceiling include plate face distributing bar 1, board bottom longitudinal prestressing reinforcing bar 2, board bottom transverse prestressed reinforcing steel bar 3 and elongated sky
The chambers of the heart 4；Plate face distributing bar 1 is distributed in the vertical and horizontal of cassette ceiling upper face；Board bottom longitudinal prestressing reinforcing bar 2, board bottom
Transverse prestressed reinforcing steel bar 3 is distributed in cassette ceiling base surface longitudinally, laterally；Elongated hollow cavity 4 is set to the vertical of cassette ceiling
To middle part, it is implanted into slide core rib 5 in elongated hollow cavity 4, the shape of the slide core rib 5 is matched with elongated hollow cavity 4；Plate face
The part that distributing bar 1, board bottom longitudinal prestressing reinforcing bar 2, board bottom transverse prestressed reinforcing steel bar 3 stretch out cassette ceiling connects with support
Connect fixation.
Elongated hollow cavity 4 and the cross sectional shape of slide core rib 5 can be attached circle shown in FIG. 1, can also be ellipse,
The irregularly-shaped holes such as jujube shape, square or rectangular.It can be selected according to actual needs.
In order to mitigate member dead weight, save reinforcing bar, slide core rib 5 uses several concatenated modes, it may be assumed that the axis of slide core rib
The heart is passed through by reinforcing bar, and the identical slide core rib of multiple shapes is cascaded, and is spaced a distance between slide core rib two-by-two.It needs
It is noted that it must be implanted with slide core rib 5 at the both ends of elongated hollow cavity, and in the same elongated hollow cavity, activity
The height (axial length) of core rib can not be identical, intermittence setting.
As Figure 2-3, in order to increase the earthquake-resistant structure of transverse bending strength and integral hollow floor in engineering use
The middle line of performance, adjacent elongated hollow cavity 4 is overlapped with the axis of board bottom longitudinal prestressing reinforcing bar 2, and the middle line of slide core rib 5 passes through
The center of circle of board bottom transverse prestressed reinforcing steel bar 3.
Cassette ceiling is in use it is possible that move left and right phenomenon, it is moved in order to prevent, adjacent elongated
The angle of setting limit cavity 6 between hollow cavity, position-limiting hole 6 and elongated hollow cavity 4 is in 90o.
As shown in figure 4, cassette ceiling is in use, according to environmental requirement, can increase in cassette ceiling upper face
Waterproof layer 7 etc. increases insulating layer 8 etc. in base surface.
A method of two dimension prestressing prefabricated reinforced concrete cassette ceiling is prepared, the method is pre-tensioning system, including with
Lower step:
(1) rectangle shaper is made, die size is 2 < l/b < 3 of length-width ratio, height h > 10cm, longitudinally-opposite side
Face opens up several hollow aperture D；
(2) bi-directional pressured plate surface construction reinforcing bar 1, board bottom longitudinal prestressing reinforcing bar 2 and plate in length and breadth are set in shaper
Bottom horizontal deformed bar 3, board bottom transverse prestressed reinforcing steel bar 3 is according to the design layout spacing, and board bottom longitudinal prestressing reinforcing bar 2 presses spacing
N is evenly arranged, and the elongated open circles core barrel of outer diameter D, the round core pipe of position-limiting hole that setting prevents plate to be displaced are laid in middle part；
(3) concrete greater than C25 intensity is poured into mold, and vibration compacting, surface receive light；
(4) elongated open circles core barrel is extracted out from mold from die side plate, is formed longitudinal elongated hollow in concrete plate；From
The round core pipe of position-limiting hole is extracted out from top mold plate in mold, forms position-limiting hole 6；
(5) the smaller slide core rib of the round radius ratio core pipe of the concrete greater than C25 intensity prefabricated in advance is pushed into longitudinal
Elongated 4 pressing board bottom horizontal deformed bar position of hollow cavity is laid, and is allowed to be formed laterally close rib, to increase the laterally rigid of concrete plate
Degree, to increase and improve the anti-seismic performance of the concrete plate.
As shown in figure 5, no beam (concealed beam) structure is done in order to meet high-strength flat beams, for making the stock mould of cassette ceiling
The cross sectional shape of tool also can be made other shapes, such as: T-type etc..
Embodiment 2
As shown in fig. 6, a kind of two dimension prestressing prefabricated reinforced concrete cassette ceiling, floor is square made of concrete placings
Shape, cassette ceiling include plate face distributing bar 1, board bottom longitudinal prestressing reinforcing bar 2, the elongated preformed hole of board bottom transverse prestressed reinforcing steel bar
Hole 9 and elongated hollow cavity 4；Plate face distributing bar 1 is distributed in the vertical and horizontal of cassette ceiling upper face；Board bottom longitudinal prestressing
Reinforcing bar 2 is distributed in the longitudinal direction of cassette ceiling base surface by design spacing；The elongated reserving hole 9 of board bottom transverse prestressed reinforcing steel bar is by setting
Meter spacing is distributed in the transverse direction of cassette ceiling base surface；Elongated hollow cavity 4 is set to the longitudinal middle part of cassette ceiling, in elongated sky
The chambers of the heart 4 is implanted into slide core rib 5, and the shape of the slide core rib 5 is matched with elongated hollow cavity 4；Plate face distributing bar 1, board bottom
The part that longitudinal prestressing reinforcing bar 2 stretches out cassette ceiling is connected and fixed with support.
Elongated hollow cavity 4 and the cross sectional shape of slide core rib 5 can be attached circle shown in fig. 6, can also be ellipse,
The irregularly-shaped holes such as jujube shape, square or rectangular.It can be selected according to actual needs.
In order to mitigate member dead weight, save reinforcing bar, slide core rib 5 uses several concatenated modes, it may be assumed that the axis of slide core rib
The heart is passed through by reinforcing bar, and the identical slide core rib of multiple shapes is cascaded, and is spaced a distance between slide core rib two-by-two.It needs
It is noted that it must be implanted with slide core rib 5 at the both ends of elongated hollow cavity, and in the same elongated hollow cavity, activity
The height (axial length) of core rib can not be identical, intermittence setting.
It is adjacent elongated in order to increase the structural seismic performance of transverse bending strength and integral hollow floor in engineering use
The middle line of hollow cavity 4 is overlapped with the axis of board bottom longitudinal prestressing reinforcing bar 2, and the middle line of slide core rib 5 passes through board bottom and laterally answers in advance
The center of circle of the elongated reserving hole 9 of power reinforcing bar.
Cassette ceiling is in use it is possible that move left and right phenomenon, it is moved in order to prevent, adjacent elongated
The angle of setting limit cavity 6 between hollow cavity, position-limiting hole 6 and elongated hollow cavity 4 is in 90o.
As shown in figure 4, cassette ceiling is in use, according to environmental requirement, can increase in cassette ceiling upper face
Waterproof layer 7 etc. increases insulating layer 8 etc. in base surface.
A method of two dimension prestressing prefabricated reinforced concrete cassette ceiling is prepared, the method is post stretching, including with
Lower step:
(1) rectangle shaper is made, die size is 2 < l/b < 3 of length-width ratio, height h > 10cm, longitudinally-opposite side
Face opens up several hollow aperture D.
(2) plate face distributing bar 1, the board bottom longitudinal prestressing reinforcing bar 2 of stress are set in shaper, and board bottom is longitudinally pre-
Stress reinforcing bar 2 is according to the design layout spacing；Lay round core pipe of the later period for mounting plate bottom horizontal deformed bar, round core pipe
It is according to the design layout spacing；It is placed in the middle to lay the elongated open circles core barrel of outer diameter D；The round core of position-limiting hole for preventing plate to be displaced is set
Pipe；
(3) concrete greater than C25 intensity is poured into mold, and vibration compacting, surface receive light；
(4) elongated open circles core barrel is extracted out from mold from die side plate, forms longitudinal elongated hollow cavity in concrete plate
4；The round core pipe of position-limiting hole is extracted out from top mold plate from mold, forms position-limiting hole 6；
(5) board bottom transverse prestressed reinforcing steel bar is inserted into the elongated reserving hole 9 of board bottom transverse prestressed reinforcing steel bar to apply and is answered in advance
Power post-stretching；
(6) the smaller slide core rib 5 of the round radius ratio core pipe of the concrete greater than C25 intensity prefabricated in advance is pushed into longitudinal direction
Elongated 4 pressing board bottom horizontal deformed bar position of hollow cavity is laid, and is allowed to be formed laterally close rib, to increase the laterally rigid of concrete plate
Degree, to increase and improve the anti-seismic performance of the concrete plate.
As shown in fig. 7, no beam (concealed beam) structure is done in order to meet high-strength flat beams, for making the stock mould of cassette ceiling
The cross sectional shape of tool also can be made other shapes, such as: T-type etc..
In view of the factors such as transporting and lifting, according to plate short span, load situation width prefabricated 900,1200,1500 etc.
Specification prestressing force (answering muscle to be evenly arranged in advance) porous plate (pre-tensioning system).It is long to size according to live Practical Project two-way slab, it uses
Above-mentioned dimension board is spliced.Prestressing force steel hinge line (presstressed reinforcing steel centralized arrangement) is worn into prior reserving hole along plate length, is adopted
Pre-stress construction is carried out with post stretching, then stitching portion steel plate is welded (groove weldering), finally completes Two-way and answer by the cementation of fissures
The installation of power prefabricated board.
Above-described embodiment is only the further explanation to the utility model, does not constitute limitations of the present invention.It is empty
The planform of heart floor, the internal diameter of elongated hollow cavity, the quantity of slide core rib and spacing can according to the actual situation into
Row setting, is not limited to shown in attached drawing, and on the basis of the utility model, that is done any draws those of ordinary skill in the art
Shen, deformation are within the protection scope of the present utility model.
Claims (8)
1. a kind of two dimension prestressing prefabricated reinforced concrete cassette ceiling, floor form for concrete placings, it is characterised in that: the sky
Heart floor includes plate face distributing bar, board bottom deformed bar and elongated hollow cavity；Plate face distributing bar is distributed in cassette ceiling
The vertical and horizontal of upper face；Board bottom deformed bar is distributed in the vertical and horizontal of cassette ceiling base surface；Elongated hollow cavity
It is set to the vertical or horizontal middle part of cassette ceiling, is implanted into slide core rib, the shape of the slide core rib in elongated hollow cavity
It is matched with elongated hollow cavity.
2. two dimension prestressing prefabricated reinforced concrete cassette ceiling according to claim 1, it is characterised in that: plate face construction
Reinforcing bar, board bottom deformed bar and elongated hollow cavity are multiple.
3. two dimension prestressing prefabricated reinforced concrete cassette ceiling according to claim 2, it is characterised in that: elongated hollow
Chamber is set to the longitudinal middle part of cassette ceiling, the middle line of adjacent elongated hollow cavity and the axis weight of board bottom longitudinal prestressing reinforcing bar
It closes.
4. two dimension prestressing prefabricated reinforced concrete cassette ceiling according to claim 2 or 3, it is characterised in that: activity
The middle line of core rib passes through the center of circle of board bottom transverse prestressed reinforcing steel bar.
5. two dimension prestressing prefabricated reinforced concrete cassette ceiling according to claim 1, it is characterised in that: further include limit
The angle of position hole, position-limiting hole and elongated hollow cavity is in 90o, is set on cassette ceiling between adjacent elongated hollow cavity, is used
It installs and positions in the later period.
6. two dimension prestressing prefabricated reinforced concrete cassette ceiling according to claim 1, it is characterised in that: the activity
Core rib is multiple and series arrangement in elongated hollow cavity.
7. two dimension prestressing prefabricated reinforced concrete cassette ceiling according to claim 1 or 6, it is characterised in that: described
The cross sectional shape of slide core rib is round, ellipse, square or rectangular.
8. two dimension prestressing prefabricated reinforced concrete cassette ceiling according to claim 1, it is characterised in that: in hollow building
The upper face of plate, base surface distinguish prefabricated waterproof layer, insulating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821921566.8U CN209384483U (en) | 2018-11-21 | 2018-11-21 | A kind of two dimension prestressing prefabricated reinforced concrete cassette ceiling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821921566.8U CN209384483U (en) | 2018-11-21 | 2018-11-21 | A kind of two dimension prestressing prefabricated reinforced concrete cassette ceiling |
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| Publication Number | Publication Date |
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| CN209384483U true CN209384483U (en) | 2019-09-13 |
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ID=67865108
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| CN201821921566.8U Active CN209384483U (en) | 2018-11-21 | 2018-11-21 | A kind of two dimension prestressing prefabricated reinforced concrete cassette ceiling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109372169A (en) * | 2018-11-21 | 2019-02-22 | 钱勇 | A kind of two dimension prestressing prefabricated reinforced concrete cassette ceiling and preparation method thereof |
| CN110878609A (en) * | 2019-12-03 | 2020-03-13 | 上海宝冶集团有限公司 | Construction method of unbonded prestressed waffle slab |
-
2018
- 2018-11-21 CN CN201821921566.8U patent/CN209384483U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109372169A (en) * | 2018-11-21 | 2019-02-22 | 钱勇 | A kind of two dimension prestressing prefabricated reinforced concrete cassette ceiling and preparation method thereof |
| CN110878609A (en) * | 2019-12-03 | 2020-03-13 | 上海宝冶集团有限公司 | Construction method of unbonded prestressed waffle slab |
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