CN105604317B - A kind of thin-walled square chest hollow floor core and its anti-float method - Google Patents
A kind of thin-walled square chest hollow floor core and its anti-float method Download PDFInfo
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- CN105604317B CN105604317B CN201610102858.8A CN201610102858A CN105604317B CN 105604317 B CN105604317 B CN 105604317B CN 201610102858 A CN201610102858 A CN 201610102858A CN 105604317 B CN105604317 B CN 105604317B
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- core
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- concrete
- template
- float method
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G15/00—Forms or shutterings for making openings, cavities, slits, or channels
- E04G15/06—Forms or shutterings for making openings, cavities, slits, or channels for cavities or channels in walls of floors, e.g. for making chimneys
- E04G15/063—Re-usable forms
-
- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a kind of thin-walled square chest hollow floor core and its anti-float method, it is a blocks with hollow cavity, the retractable liquid injection hole for being used for injecting liquid into core is provided with the core, at least three bearings for being used to be supported in template are evenly equipped with the bottom surface of the core, and the retractable tubulose outage for liquid in core to be discharged is additionally provided with the bottom surface of core, the outage is extended in template.Construction is simple of the present invention, anti-floating effect is good, can preferably control the horizontal shift of core, improves construction quality；The recycling rate of waterused of template is improved, reduces construction cost, considerably reduces the labor intensity of worker, while substantially increases efficiency of construction；The present invention carries bearing, with it is existing using cushion block support core compared with because eliminating cushion block, without use extra anti-floating building materials, and for inject core liquid it is recyclable recycled, reduce further construction cost.
Description
Technical field
The present invention relates to thin-walled square chest hollow floor technology, more particularly to a kind of thin-walled square chest hollow floor core, also relate to
And the anti-float method of the core.
Background technology
Hollow floor is a kind of cast-in-situ reinforced concrete building cover structure, and also referred to as cast-in-place without beam hollow building cover, it is installation core
After product it is cast-in-place form it is hollow without bright beam superstructure.Hollow floor includes reinforcing bar, concrete and core, and core is embedded in reinforced concrete,
Core is generally light material.Hollow floor mitigates structural weight per square meter, increase building headroom because it has, saves construction material, drop
The advantages that low comprehensive cost and be widely used.
Thin-walled square chest hollow floor is the regular embedment thin-walled square chest mould in cast-in-place concrete building roof, makes armored concrete
Superstructure is internally formed the reinforced concrete hollow floor of the cast-in-place rib of the two-way grid of certain intervals.Thin-walled square chest hollow floor is significantly taken out
Empty concrete, mitigate floor deadweight, increase reinforcing bar to the distance of cross-sectional neutral axis, so as to be added significantly to the bending rigidity of floor, subtract
Amount of reinforcement is lacked.Thin-walled square chest is a kind of full built-in core mould, and it is a kind of thin-walled hollow small size of square or rectangular
Totally-enclosed no through hole casing.Thin-walled square chest can have high excellent of in light weight, intensity with the deformation of operative constraint cast-in-place concrete
Point.
The solid or hollow light material of thin-walled square chest hollow floor core generally use is made, four thorough envelopes of core
Close.During construction thin-walled square chest hollow floor, support body support system is built first, and template is secondly placed on support body support system
On, and in template carry out core positioning setting-out, then above template colligation hollow floor bottom muscle and concealed beam reinforcing bar, then exist
Several cores (core is shelved in template by cushion block) are equidistantly laid in template, in order to prevent in concreting process,
Core floats or shifted towards surrounding occurred level upwards, Anti-floating reinforcing steel bar is set in the top of core, generally positioned at each thin
Punched in the template of wall square chest periphery, then Anti-floating reinforcing steel bar mesh sheet is fixed on by support body support system through template using steel wire
On system.However, this prevent that core from floating and the method for horizontal shift has following defect：
(1) Anti-floating reinforcing steel bar mesh sheet is fixed in support body support system by steel wire through template, and the length of steel wire is longer, and anti-
The bending rigidity of floating reinforcing bar is small, causes anti-floating effect poor, influences construction quality.
(2) core light weight, in concreting, easy occurred level displacement, and the steel wire positioned at core surrounding is more difficult
The horizontal shift of core is controlled, in this way, further influenceing construction quality.
(3) the quantity of steel wire is more, and correspondingly, punching quantity is also more in template, so that template can not reuse, improves
Construction cost.
(4) fixing point position of the steel wire in Anti-floating reinforcing steel bar mesh sheet and support body support system is more, the number punched in addition in template
Amount is more, adds labor strength, wastes time and energy, construction speed is slow, reduces efficiency of construction.
The content of the invention
First purpose of the present invention is to provide that a kind of construction is simple, anti-floating effect are good, can preferably control the level of core
Displacement, improve construction quality, the thin-walled square chest improve template recycling rate of waterused, reduce hand labor intensity, improving efficiency of construction
Hollow floor core.
Second object of the present invention is to provide a kind of anti-float method of above-mentioned thin-walled square chest hollow floor core.
First purpose of the present invention is realized by following technical measures：A kind of thin-walled square chest hollow floor core
Mould, it is a blocks with hollow cavity, it is characterised in that：It is provided with the core and is used to inject liquid into core
Retractable liquid injection hole, at least three bearings for being used to be supported in template are evenly equipped with the bottom surface of the core, and in core
The retractable tubulose outage for liquid in core to be discharged is additionally provided with the bottom surface of mould, the outage extends template
On.
The present invention principle be：By increase the weight of core realize anti-floating of the core in concreting process and
The purpose of controlled level displacement.Liquid is specifically injected into core from liquid injection hole, in concreting process, controls coagulation
Native speed of perfusion makes concrete buoyancy less than core and the gross weight of liquid filling body, to realize anti-floating purpose.Present invention construction letter
List, anti-floating effect is good, can preferably control the horizontal shift of core, improves construction quality；In addition, the anti-floating with existing core
Method is compared, due to without being punched in template, on the one hand, improve the recycling rate of waterused of template, reduce construction cost, separately
On the one hand, due to eliminating steel wire and Anti-floating reinforcing steel bar, without fixing steel wire on Anti-floating reinforcing steel bar and support body support system, significantly
The labor intensity of worker is reduced, while substantially increases efficiency of construction；Further, the present invention is due to carrying bearing, therefore can be with
Directly rested on by bearing in template, compared with the existing support core using cushion block, because eliminating cushion block, without making
With extra anti-floating building materials, and for injecting, the liquid of core is recyclable to be recycled, and reduce further construction
Cost.
As a modification of the present invention, the bearing for erect body, hollow cavity and the bearing phase of the core
It is logical, blocked up on the lower nozzle of the bearing provided with the plug for blocking the mouth of pipe, at least one conduct row among the bearing
Fluid apertures.
In order to which in concreting, concrete can smoothly be filled into the space below core, the entirety of superstructure is improved
Property, as a further improvement on the present invention, the core is provided with the pouring hole of vertically communicated core, and pouring hole periphery
For closed toroidal cavity, the toroidal cavity is the hollow cavity of the core.Concrete can smoothly pour from pouring hole
Space below to core.
The present invention can also do following improvement, and the pouring hole is respectively facing the top surface of core from middle part and bottom surface is gradually expanded
Greatly.
As a kind of preferred embodiment of the present invention, the liquid injection hole is located on the top surface of the core.Conveniently to core
Injection liquid in mould, also allow for adjusting the injection rate of liquid.
Second object of the present invention is realized by following technical measures：A kind of hollow building of above-mentioned thin-walled square chest
The anti-float method of cover core mould, it is characterised in that including step in detail below：
(1) core is shelved in the template in support body support system by bearing；
(2) liquid injection hole is opened, liquid is injected into core by liquid injection hole；
(3) liquid injection hole, the gluten of colligation hollow floor, then casting concrete are closed, is subject to the core for filling liquid mixed
Solidifying soil when pouring caused buoyancy be less than the gross weight of core and liquid, to fill the resistance concreting of the core of liquid
When caused buoyancy, while control the horizontal shift of itself；
(4) after concrete reaches intensity, support body support system and template are removed；
(5) outage is opened, the liquid in core is discharged.
As one embodiment of the present invention, before liquid is injected to core, according to the speed of perfusion of concrete and
The weight of core calculates the injection rate of liquid.
As another embodiment of the invention, before casting concrete, according to core and the weight of liquid filling body
Calculate the speed of perfusion of concrete.
Concrete of the present invention reaches intensity and refers to that concrete reaches initial set or reaches design strength.
The speed of perfusion of concrete of the present invention is less than or equal to 0.15m/h.
Compared with prior art, the present invention has following significant effect：
(1) principle of the invention is：Anti-floating of the core in concreting process is realized by increasing the weight of core
With the purpose of controlled level displacement.Liquid is specifically injected into core from liquid injection hole, in concreting process, control is mixed
The gross weight that native speed of perfusion makes concrete buoyancy be less than core and liquid filling body is coagulated, to realize anti-floating purpose.Present invention construction
Simply, anti-floating effect is good, can preferably control the horizontal shift of core, improves construction quality.
(2) anti-float method of the present invention is compared with the anti-float method of existing core, due to without being punched in template, on the one hand,
The recycling rate of waterused of template is improved, reduces construction cost, on the other hand, due to eliminating steel wire and Anti-floating reinforcing steel bar, without
Steel wire is fixed on Anti-floating reinforcing steel bar and support body support system, the labor intensity of worker is considerably reduced, substantially increases simultaneously
Efficiency of construction.
(3) core of the present invention is due to carrying bearing, therefore can be directly rested on by bearing in template, with existing use
Cushion block support core is compared, because eliminating cushion block, without using extra anti-floating building materials, and for injecting core
Liquid it is recyclable recycled, reduce further construction cost.
(4) the structure of core of the present invention is simple, practical, and cost is low, can not only be applicable in hollow floor field, also may be used
Suitable for other Cast-in-place concrete components, suitable for being widely popularized and being applicable.
Brief description of the drawings
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the upward view of core of the present invention；
Fig. 2 is the line B-B sectional view along Fig. 1；
Fig. 3 is the line A-A sectional view along Fig. 1；
Fig. 4 is the schematic diagram that core of the present invention is located in hollow floor.
Embodiment
As shown in figures 1-4, it is a kind of thin-walled square chest hollow floor core 1 of the present invention, it is a block with hollow cavity
Shape body, generally square body or cuboid, the retractable liquid injection hole 2 for being used for injecting liquid into core 1 is provided with core 1,
Liquid injection hole 2 is located on the top surface of core 1, and plug is provided with specifically on the aperture of liquid injection hole and is blocked up, realizes the folding of liquid injection hole.In core
At least three bearings 3 for being used to be supported in template are evenly equipped with the bottom surface of mould 1, in the present embodiment, bearing 3 is four, point
Not Wei Yu core four corner locations, and be additionally provided with the bottom surface of core 1 retractable for liquid in core 1 to be discharged
Tubulose outage, outage extended in template.Core 1 is provided with the pouring hole 4 of vertically communicated core, and the periphery of pouring hole 4
For closed toroidal cavity, toroidal cavity is the hollow cavity of core, and pouring hole 4 is respectively facing the top surface of core 1 from middle part
Gradually expand with bottom surface, in bell mouth shape.The space for being easy to concrete to be smoothly filled into by pouring hole 4 below core,
To improve the globality of superstructure.
In the present embodiment, bearing 3 is the body erect, and the hollow cavity of core 1 communicates with bearing 3, under bearing 3
The mouth of pipe is provided with the plug stifled 5 for blocking the mouth of pipe, and at least one among bearing 3 is used as outage, in the present embodiment, whole
Bearing uses as outage.
A kind of anti-float method of above-mentioned thin-walled square chest hollow floor core, including step in detail below：
(1) support body support system is built, template is placed in support body support system, and core positioning is carried out in template
Setting-out, then above template colligation hollow floor bottom muscle 6 and concealed beam reinforcing bar, several cores are then equidistantly laid in template
1, core 1 is shelved in the template in support body support system by bearing 3；
(2) liquid injection hole 2 is opened, liquid is injected into core 1 by liquid injection hole 2；Before liquid is injected to core 1, according to
The speed of perfusion of concrete and the weight of core 1 calculate the injection rate of liquid, or before casting concrete, according to core 1
And the weight of liquid filling body calculates the speed of perfusion of concrete.
(3) liquid injection hole, the gluten 7 of colligation hollow floor 8, then casting concrete are closed, makes what the core for filling liquid was subject to
Caused buoyancy is less than the gross weight of core and liquid during concreting, is poured to fill the core of liquid resistance concrete
Caused buoyancy when building, while control the horizontal shift of itself；
According to《Construction handbook》, young concrete (uses internal vibrator to the pressure criteria value of formwork sides
When), calculated according to following two formula, and take the smaller value according to the two formula result of calculation：
F=0.22 γc t0β1β2V1/2Formula is (1)
F=γcH formula are (2)
In formula, F is to the maximum lateral pressure of template, kN/m2；γcFor the force density of concrete, kN/m3；t0Newly to pour
Build the presetting period of concrete, h, can be determined by actual measurement.When lacking testing data, t can be used0=200/ (T+15) calculates (T
For the temperature of concrete, DEG C)；V be concrete speed of perfusion, m/h；H is to newly pouring at concrete lateral pressure calculation position
The total height of top of concrete, m；β1Correction factor is influenceed for additive, 1.0 is taken when not mixing additive, mixes with deferred action
Additive when take 1.2；β2Correction factor is influenceed for concrete slump, when the slump is less than 30mm, takes 0.85, the slump
For 50mm~90mm when, take 1.0, when the slump is 110mm~150mm, take 1.15.
In the present embodiment, liquid selects the water of inexpensive, pours water untill by liquid injection hole spilling water.It can also select
With other liquid.The speed of perfusion of concrete is less than or equal to 0.15m/h.In the present embodiment, the speed of perfusion of concrete
For 0.15m/h, additive is not added with, the concrete initial set time is 3.5h, slump 150mm.(1) (2) counted with formula using formula
Calculation obtains F, i.e., buoyancy F=0.22 × 24 × 3.5 × 1.0 × 1.15 × 0.15 that core is subject to1/2=8.23kN/m2, calculate
The buoyancy F=8.23kN/m of the core arrived2Less than the deadweight of water.
(4) after concrete reaches initial set or reaches design strength, support body support system and template are removed；
(5) outage is opened, the liquid in core is discharged.The used water of anti-floating can reclaim.
The implementation of the present invention is not limited to this, according to the above of the present invention, is known using the ordinary skill of this area
Knowledge and customary means, under the premise of the above-mentioned basic fundamental thought of the present invention is not departed from, the present invention can also make other a variety of shapes
Modification, replacement or the change of formula, all fall within rights protection scope of the present invention.
Claims (5)
1. a kind of anti-float method of thin-walled square chest hollow floor core, the thin-walled square chest hollow floor core, it is that one have
The blocks of hollow cavity, the retractable liquid injection hole for being used for injecting liquid into core is provided with the core, in the core
At least three bearings for being used to be supported in template are evenly equipped with the bottom surface of mould, and is additionally provided with and is used for core on the bottom surface of core
The retractable tubulose outage that liquid is discharged in mould, the outage are extended in template, it is characterised in that including in detail below
Step：
(1) core is shelved in the template in support body support system by bearing；
(2) liquid injection hole is opened, liquid is injected into core by liquid injection hole；
(3) liquid injection hole, the gluten of colligation hollow floor, then casting concrete, the concrete for being subject to the core for filling liquid are closed
Caused buoyancy is less than the gross weight of core and liquid when pouring, to fill the core of liquid resistance concreting when institute
Caused buoyancy, while control the horizontal shift of itself；
(4) after concrete reaches intensity, support body support system and template are removed；
(5) outage is opened, the liquid in core is discharged.
2. anti-float method according to claim 1, it is characterised in that：Before liquid is injected to core, according to concrete
Speed of perfusion and core weight calculate liquid injection rate.
3. anti-float method according to claim 2, it is characterised in that：Before casting concrete, according to core and filling
The weight of liquid calculates the speed of perfusion of concrete.
4. the anti-float method according to Claims 2 or 3, it is characterised in that：The concrete reaches intensity and refers to concrete
Reach initial set or reach design strength.
5. anti-float method according to claim 4, it is characterised in that：The speed of perfusion of the concrete is less than or equal to
0.15m/h。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610102858.8A CN105604317B (en) | 2016-02-24 | 2016-02-24 | A kind of thin-walled square chest hollow floor core and its anti-float method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610102858.8A CN105604317B (en) | 2016-02-24 | 2016-02-24 | A kind of thin-walled square chest hollow floor core and its anti-float method |
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| Publication Number | Publication Date |
|---|---|
| CN105604317A CN105604317A (en) | 2016-05-25 |
| CN105604317B true CN105604317B (en) | 2018-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610102858.8A Active CN105604317B (en) | 2016-02-24 | 2016-02-24 | A kind of thin-walled square chest hollow floor core and its anti-float method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112392189A (en) * | 2020-11-30 | 2021-02-23 | 浙江省建筑设计研究院 | Hollow floor system with stiffening columns and box body for improving local pressure bearing performance of plate surface and construction method of hollow floor system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH544636A (en) * | 1971-05-05 | 1973-11-30 | Semperit Ag | Reusable hollow formwork and method for its operation |
| JP2791852B2 (en) * | 1993-09-28 | 1998-08-27 | トーヨー産業株式会社 | Boxed molded body and boxed method |
| CN1644835A (en) * | 2005-01-12 | 2005-07-27 | 姜胜清 | Construction for steel bar reinforced hollow concrete roof cast-in-situs |
| CN1696423A (en) * | 2004-05-10 | 2005-11-16 | 邱则有 | Lightweight hollow slab made from concrete reinforced by steel bar cast in-site |
| CN201095864Y (en) * | 2007-06-28 | 2008-08-06 | 唐巧凤 | Drawable square box mandrel |
| CN205400050U (en) * | 2016-02-24 | 2016-07-27 | 广东省建筑设计研究院 | Hollow superstructure mandrel of thin wall square chest |
-
2016
- 2016-02-24 CN CN201610102858.8A patent/CN105604317B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH544636A (en) * | 1971-05-05 | 1973-11-30 | Semperit Ag | Reusable hollow formwork and method for its operation |
| JP2791852B2 (en) * | 1993-09-28 | 1998-08-27 | トーヨー産業株式会社 | Boxed molded body and boxed method |
| CN1696423A (en) * | 2004-05-10 | 2005-11-16 | 邱则有 | Lightweight hollow slab made from concrete reinforced by steel bar cast in-site |
| CN1644835A (en) * | 2005-01-12 | 2005-07-27 | 姜胜清 | Construction for steel bar reinforced hollow concrete roof cast-in-situs |
| CN201095864Y (en) * | 2007-06-28 | 2008-08-06 | 唐巧凤 | Drawable square box mandrel |
| CN205400050U (en) * | 2016-02-24 | 2016-07-27 | 广东省建筑设计研究院 | Hollow superstructure mandrel of thin wall square chest |
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| Publication number | Publication date |
|---|---|
| CN105604317A (en) | 2016-05-25 |
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