CN105587060B - The construction method of the retarded adhesive prestressed cassette ceiling of the cast-in-place post stretching of large span super thick - Google Patents
The construction method of the retarded adhesive prestressed cassette ceiling of the cast-in-place post stretching of large span super thick Download PDFInfo
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- CN105587060B CN105587060B CN201510981353.9A CN201510981353A CN105587060B CN 105587060 B CN105587060 B CN 105587060B CN 201510981353 A CN201510981353 A CN 201510981353A CN 105587060 B CN105587060 B CN 105587060B
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- floor
- construction method
- side form
- cast
- hollow block
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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
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
- E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
-
- 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
- E04B5/18—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly cast between filling members
- E04B5/21—Cross-ribbed floors
Abstract
The invention discloses a kind of construction method of the retarded adhesive prestressed cassette ceiling of cast-in-place post stretching of large span super thick, main construction procedure includes：（1）Bed die is laid with,（2）Reinforcement construction,（3）Side form is installed,（4）The installation of precast hollow block is reinforced,（5）Concreting,（6）Prestressed stretch-draw.Floor main reinforcement is connect with side form and then the position of stationary body framework of steel reinforcement, and hollowcore precast block by Anti-floating reinforcing steel bar and floor main body bar connecting there is good effect, horizontal direction to be positioned by U-shaped clamp in terms of the floating of reply hollow block；The positioning of delayed bonding prestressed tendon uses locating support, accurate positioning；Concrete amount is reduced using this construction method, improves construction efficiency, reduces cost, while reducing the destruction to environment, there are good economic and social benefits.
Description
Technical field
The present invention relates to the construction method of prestressed hollow slab more particularly to the cast-in-place post stretching slow cohesions of large span super thick
The construction method of prestressed hollow slab.
Technical background
Growing with individual demand, domestic construction market pair is substantially improved recently as engineering technology level
The demand of open large space increases；Prestressed hollow slab technology has the big small, rigidity of conducting oneself with dignity, cracking resistance, non-deformability strong
The features such as, there is good adaptability to large span, big load structure.
The anti-floating of precast hollow block is mostly used prefabricated section and main body reinforcing bar greatly in traditional cassette ceiling construction technology
It being connected and fixed, the buoyancy that precast hollow block generates is transmitted to framework of steel reinforcement, but for large span super thick cassette ceiling, prefabricated sky
Heart block will generate huge buoyancy in the concrete just poured, if processing is bad may to lead to reinforcing bar, bed die on the whole
It is floating, the case where shuttering supporting unstability is collapsed；Traditional prestressed hollow slab uses unbonded prestressing tendon or has bonding
Presstressed reinforcing steel, unbonded prestressing tendon has the shortcomings that structural behaviour deficiency, and is needed in bonded prestressed tendon construction hole arranged
Road and pressure drop, complex process and produce a large amount of pollutant.
In consideration of it, fast there is an urgent need for inventing a kind of speed of application at present, precast hollow block Anti-floating design is reasonable, is suitable for large span
The environmentally friendly hollow floor construction method of super thick cassette ceiling.
Invention content
The purpose of the present invention is to provide a kind of speed of application is fast, precast hollow block Anti-floating design is reasonable, be suitable for greatly across
Spend the environmentally friendly hollow floor construction method of super thick cassette ceiling.
To achieve the above object, present invention employs following technical schemes：
The construction method of the retarded adhesive prestressed cassette ceiling of the cast-in-place post stretching of large span super thick, includes the following steps：
1) bed die is laid with：It is square on the supporting member to be laid with bed die in floor plan location arrangements support member；
2) reinforcing bar is bound：Floor bar is bound, floor bar includes rib of slab reinforcing bar and floor main reinforcement, it is desirable that floor main reinforcement
Length is more than floor horizontal span, and when assembling reinforcement pays attention to reserving the position of precast hollow block according to design drawing；Slow cohesion is pre-
Stress rib is positioned using Steel bar rack, and tied silk binding should not be too tight, is convenient for later stage tensioning；
3) side form is installed：Surrounding installs floor side form, the reserved steel bar hole on side form above bed die, and floor main reinforcement passes through
The reinforced hole stretches out on the outside of side form, and entire floor bar and floor side form are fixed；
4) installation of precast hollow block, reinforcing：Precast hollow block is laid in floor corresponding position, Anti-floating reinforcing steel bar passes through prefabricated sky
Heart block, both ends are connect with floor top bars and baseplate reinforcing bar respectively, and U-shaped clamp is equipped between contiguous prefabricated hollow block；
5) concreting：After confirming side form closing, pouring for top concrete is carried out, in rib of slab position and filling when pouring
Slurry is vibrated in hole with vibrating spear；
6) prestressed stretch-draw：Concrete strength reaches the 80% of the design pre- tensioning for carrying out delayed bonding prestressed tendon, intensity
Reach design 100% completes final tensioning.
The construction method of the retarded adhesive prestressed cassette ceiling of the cast-in-place post stretching of large span super thick above-mentioned, institute in step (2)
The Steel bar rack stated is made of stud, steel plate base, arc jacking, wherein steel plate base and floor soleplate reinforcement welding, arc
Jacking is arranged at the top of stud.
The construction method of the retarded adhesive prestressed cassette ceiling of the cast-in-place post stretching of large span super thick above-mentioned, the precast hollow
Gas vent is equipped at the top of block.
The construction method of the retarded adhesive prestressed cassette ceiling of the cast-in-place post stretching of large span super thick above-mentioned, support member include
The holder that the steel pipe and steel pipe bottom of lateral arrangement are vertically installed.
The construction method of the retarded adhesive prestressed cassette ceiling of the cast-in-place post stretching of large span super thick above-mentioned, Anti-floating reinforcing steel bar with it is pre-
Hollow block processed is fixed using nut.
The construction method of the retarded adhesive prestressed cassette ceiling of the cast-in-place post stretching of large span super thick above-mentioned, floor in step 3)
The part that main reinforcement stretches out floor side form puts on rubber pad.
The present invention has the characteristics that following and advantageous effect：
(1) inserting knot of delayed bonding prestressed tendon is simple, is not necessarily to reserving hole channel and pressure drop, easy for construction, reduces and sets
Standby buying, and the discharge of pollutant (mortar) is reduced, it is good for the environment.
(2) precast hollow block, main body reinforcing bar, floor side form are linked to be an entirety by this construction method, and anti-floating works well,
Disease that may be present in cassette ceiling casting process is admirably controlled, ensure that the quality of prestressed hollow slab construction.
(3) in the case where not changing floor sectional dimension, the application of delayed bonding prestressed tendon technology can make presstressed reinforcing steel
Quantity reduce 15% or so, and cassette ceiling concrete amount is few, therefore this construction method is with good economic efficiency.
In short, the construction method connect floor main reinforcement with side form and then the position of stationary body framework of steel reinforcement, it is hollow pre-
Clamp dog is connect with floor main body reinforcing bar (baseplate reinforcing bar and top bars), has good effect in terms of the floating of reply hollow block
Fruit；The positioning of delayed bonding prestressed tendon uses locating support, accurate positioning；Concrete amount is reduced using this construction method,
Construction efficiency is improved, cost is reduced, while reducing the destruction to environment, there are good economic and social benefits.
Description of the drawings
Fig. 1, which is that the cast-in-place post stretching of super thick of the present invention is slow, coheres prestressed hollow slab schematic diagram；
Fig. 2, which is that the cast-in-place post stretching of invention super thick is slow, coheres prestressed hollow slab sectional view；
Fig. 3 is delayed bonding prestressed tendon layout drawing；
Fig. 4 is construction flow chart of the present invention.
In figure：1. bed die, 2. baseplate reinforcing bars, 3. precast hollow blocks, 4.U shape clamps, 5. Anti-floating reinforcing steel bars, 6. nuts, 7. fill
Starch hole, 8. gas vents, 9. top bars, 10. concrete, 11. wooden distracted, 12. steel pipes, 13. holders, 14. floor main reinforcements, 15. plates
Rib reinforcement, 16. side forms, 17. rubber pads, 18. delayed bonding prestressed tendons, 19. cushion blocks, 20. bifilar iron wires, 21. tied silks, 22. is vertical
Muscle, 23. steel plate bases, 24. arc jackings.
Specific implementation mode
Technical scheme of the present invention is illustrated below with reference to embodiment and attached drawing：
Present embodiment steel plate welding procedure is bolted construction technology, tension of prestressed tendon technique and concreting
It is not just stated tired in this implementation such as construction technology, emphasis illustrates that the present invention relates to the embodiments of structure.
Embodiment 1
Fig. 1, which is that the cast-in-place post stretching of super thick of the present invention is slow, coheres prestressed hollow slab schematic diagram；Fig. 2 is that invention super thick is cast-in-place
Post stretching is slow to cohere prestressed hollow slab sectional view.Referring to Fig.1, shown in 2, delay in the cast-in-place post stretching of super thick and cohere prestressing force sky
The bottom of heart floor, is disposed with support member, which includes the steel pipe 12 of lateral arrangement and vertical holder 13, is being propped up
The top setting bed die 1 and baseplate reinforcing bar 2 of support part part, the precast hollow block of multiple rows of multiple row is arranged in the top of baseplate reinforcing bar 2
3, arrange that floor bar, floor bar include the floor main reinforcement 14 and rib of slab reinforcing bar 15 of lateral arrangement between precast hollow block,
1 surrounding of bed die erects side form 16, and floor main reinforcement 14 passes through side form 16 convenient for fixing, and Anti-floating reinforcing steel bar 5 passes through two after precast hollow block 3
End connect respectively with floor top bars 9 and baseplate reinforcing bar 2 convenient for fixation precast hollow block 3, and Anti-floating reinforcing steel bar 5 itself with it is pre-
Hollow block 3 processed is fixed using nut 6, and U-shaped clamp 4 is equipped between contiguous prefabricated hollow block, for horizontal fixed precast hollow block；
Baseplate reinforcing bar 2 is lined with cushion block 19 by bifilar iron wire 20 and 1 banding fixed of bed die, the bottom of precast hollow block.
Fig. 3 is delayed bonding prestressed tendon layout drawing, and with reference to shown in Fig. 3, delayed bonding prestressed tendon arrangement uses Steel bar rack
Positioning, tied silk 21 is bound should not be too tight, is convenient for later stage tensioning；The Steel bar rack is by stud 22, steel plate base 23, arched top
Support 24 forms, and steel plate base 23 is welded with baseplate reinforcing bar 2.
Fig. 4 is construction flow chart of the present invention, and with reference to shown in Fig. 4, the cast-in-place post stretching slow cohesion of large span super thick is answered in advance
Power hollow floor construction method, steps are as follows：
(1) bed die is laid with：Steel pipe 12, holder 13 are set as support, in steel pipe orthogonal direction in floor plan position
Arrangement wood distracted 11, is then laid with bed die 1 on wood distracted 11.
(2) floor bar is bound：Floor bar includes rib of slab reinforcing bar 15 and floor main reinforcement 14, it is desirable that floor main reinforcement is more than building
Plate horizontal span, when assembling reinforcement, pay attention to reserving the position of precast hollow block 3 according to design drawing；Delayed bonding prestressed tendon 18 is adopted
It is positioned with Steel bar rack, tied silk binding should not be too tight, is convenient for later stage tensioning.
(3) installation floor side form 16：Floor main reinforcement 14 is directed at side form preformed hole, floor main reinforcement 14 is stretched out on the outside of side form,
Entire framework of steel reinforcement is fixed on side form, reinforcing bar sponson puts on rubber pad 17.
(4) installation of precast hollow block, reinforcing：Precast hollow block 3 is laid in floor corresponding position, Anti-floating reinforcing steel bar 5 passes through pre-
Hollow block 3 processed is simultaneously connect with floor top bars 9 and baseplate reinforcing bar 2.
(5) concreting：After confirming that side form 16 is closed, carries out concrete 10 and pour, in rib of slab position and filling when pouring
Slurry is vibrated in hole 7 with vibrating spear, and gas vent 8 is additionally provided at the top of prefabricated section.
(6) prestressed stretch-draw：Concrete strength reaches the 80% of the design pre- tensioning for carrying out delayed bonding prestressed tendon 18, by force
What degree reached design 100% completes final tensioning.
Claims (5)
1. the construction method of the retarded adhesive prestressed cassette ceiling of the cast-in-place post stretching of large span super thick, it is characterised in that including following step
Suddenly：
1) bed die is laid with：It is square on the supporting member to be laid with bed die (1) in floor plan location arrangements support member；
2) reinforcing bar is bound：Floor bar is bound, floor bar includes rib of slab reinforcing bar (15) and floor main reinforcement (14), it is desirable that floor master
The length of muscle is more than floor horizontal span, and when assembling reinforcement pays attention to reserving the position of precast hollow block (3) according to design drawing；It is slow
Binding prestress reinforcement is positioned using Steel bar rack, and tied silk binding should not be too tight, is convenient for later stage tensioning；The Steel bar rack is by standing
Muscle (22), steel plate base (23), arc jacking (24) composition, wherein steel plate base and floor soleplate reinforcement welding, arc jacking
It is arranged at the top of stud；
3) side form is installed：Surrounding installation floor side form (16), the reserved steel bar hole on side form, floor main reinforcement (14) above bed die
It is stretched out on the outside of side form across the reinforced hole, entire floor bar and floor side form is fixed；4) installation of precast hollow block, reinforcing：
Floor corresponding position lay precast hollow block (3), Anti-floating reinforcing steel bar (5) pass through precast hollow block, both ends respectively with floor upper layer
Reinforcing bar (9) and baseplate reinforcing bar (2) connect, and U-shaped clamp (4) is equipped between contiguous prefabricated hollow block；
5) concreting：After confirming that side form (16) is closed, pouring for top concrete is carried out, in rib of slab position and filling when pouring
It is vibrated with vibrating spear in slurry hole (7)；
6) prestressed stretch-draw：Concrete strength reaches the 80% of the design pre- tensioning for carrying out delayed bonding prestressed tendon (18), intensity
Reach design 100% completes final tensioning.
2. the construction method of the retarded adhesive prestressed cassette ceiling of the cast-in-place post stretching of large span super thick according to claim 1,
It is characterized in that being equipped with gas vent (8) at the top of the precast hollow block.
3. the construction method of the retarded adhesive prestressed cassette ceiling of the cast-in-place post stretching of large span super thick according to claim 1,
It is characterized in that the support member includes the steel pipe (12) of lateral arrangement and the holder (13) that steel pipe bottom is vertically installed.
4. the construction method of the retarded adhesive prestressed cassette ceiling of the cast-in-place post stretching of large span super thick according to claim 1,
It is characterized in that Anti-floating reinforcing steel bar (5) is fixed using nut (6) with precast hollow block (3).
5. the construction method of the retarded adhesive prestressed cassette ceiling of the cast-in-place post stretching of large span super thick according to claim 1,
It is characterized in that the part of floor main reinforcement stretching floor side form puts on rubber pad (17) in step 3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510981353.9A CN105587060B (en) | 2015-12-23 | 2015-12-23 | The construction method of the retarded adhesive prestressed cassette ceiling of the cast-in-place post stretching of large span super thick |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510981353.9A CN105587060B (en) | 2015-12-23 | 2015-12-23 | The construction method of the retarded adhesive prestressed cassette ceiling of the cast-in-place post stretching of large span super thick |
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| CN105587060A CN105587060A (en) | 2016-05-18 |
| CN105587060B true CN105587060B (en) | 2018-09-14 |
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| CN105908885B (en) * | 2016-06-27 | 2018-11-09 | 青岛一建集团有限公司 | A kind of large format multiple hole Lightweight core mould and its construction method |
| CN106049733B (en) * | 2016-07-15 | 2019-09-13 | 中国矿业大学 | A kind of honeycomb hole profiled sheet sandwich hollow slab |
| CN106968377B (en) * | 2017-04-18 | 2019-03-19 | 华北理工大学 | The well formula rib frame laminated floor slab structure and its construction method of the built-in anti-suspension positioning device of light plastid |
| CN111021614A (en) * | 2019-12-19 | 2020-04-17 | 中国建筑第八工程局有限公司 | Multi-layer large-span prestressed system and frame body quick-dismantling construction method thereof |
| CN113550477B (en) * | 2021-05-14 | 2022-08-23 | 哈尔滨工业大学（威海） | Low-cost foldable honeycomb core floor filling block and using method thereof |
| CN113802745B (en) * | 2021-08-24 | 2023-03-24 | 中铁七局集团有限公司 | Construction method of thin-wall concrete hollow floor |
| CN113789898B (en) * | 2021-09-28 | 2022-11-11 | 中能建西北城市建设有限公司 | Construction method of large-span slow-bonding prestressed floor slab |
| CN114635564A (en) * | 2022-01-10 | 2022-06-17 | 中铁二十一局集团第四工程有限公司 | Large-span slow-bonding prestressed hollow floor core mold construction method |
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| IT1404240B1 (en) * | 2011-01-13 | 2013-11-15 | Caboni | MODULAR SYSTEM OF ASSEMBLY OF A CASSERO TO LOSE FOR THE THROW OF A PLAN. |
| CN104405068A (en) * | 2014-10-11 | 2015-03-11 | 中厦建设有限公司 | Construction method of post-tensioned unbonded prestressed hollow floor slab |
| CN205875473U (en) * | 2016-05-25 | 2017-01-11 | 中大建设股份有限公司 | Built -in location prefab reinforced concrete shear wall |
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Effective date of registration: 20180604 Address after: 225200 Xindu Road, Jiangdu District, Yangzhou, Jiangsu Province, No. 399 Applicant after: Jiangsu Huajiang Construction Group Co., Ltd. Address before: 310015 room 1901, unit 3, 3 Wanda Commercial Center, Gongshu District, Hangzhou, Zhejiang. Applicant before: Hangzhou Jiang Run Science and Technology Ltd. |
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