CN105604317A - Thin-wall square box hollow floor mandrel and anti-floating method thereof - Google Patents
Thin-wall square box hollow floor mandrel and anti-floating method thereof Download PDFInfo
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- CN105604317A CN105604317A CN201610102858.8A CN201610102858A CN105604317A CN 105604317 A CN105604317 A CN 105604317A CN 201610102858 A CN201610102858 A CN 201610102858A CN 105604317 A CN105604317 A CN 105604317A
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- core
- liquid
- mandrel
- thin
- template
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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 thin-wall square box hollow floor mandrel and an anti-floating method thereof. The thin-wall square box hollow floor mandrel is a block with a hollow cavity and is provided with an openable liquid injection hole used for injecting liquid into the mandrel, at least three supports used for being supported by a template are evenly distributed on the bottom surface of the mandrel, an openable tubular liquid discharge outlet used for discharging liquid in the mandrel is also formed in the bottom surface of the mandrel, and the liquid discharge outlet extends to the template. By the adoption of the mandrel, construction is easy, the anti-floating effect is good, horizontal movement of the mandrel can be well controlled, and construction quality is improved; the recycle rate of the template is increased, construction cost is reduced, the labor intensity of workers is relieved greatly, and construction efficiency is improved greatly. The mandrel is provided with the supports, and compared with existing mandrels adopting cushion blocks for supporting, the mandrel has the advantage that due to the omission of cushion blocks, extract building materials for floating resistance are not needed; furthermore, liquid used for being injected into the mandrel can be recycled, so that construction cost is further reduced.
Description
Technical field
The present invention relates to thin-walled square chest hollow building cover technology, particularly a kind of thin-walled square chest hollow building cover core,Also relate to the anti-float method of this core.
Background technology
Hollow building cover 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 to installCast-in-place form hollow without bright beam superstructure after core product. Hollow building cover comprises reinforcing bar, concrete and core, and core buriesPut in reinforced concrete, core is generally light material. Hollow building cover has the structural weight per square meter of alleviating, increases and build because of itBuild the advantages such as headroom, saving construction material, reduction comprehensive cost and be widely used.
Thin-walled square chest hollow building cover is the regular thin-walled square chest mould of imbedding in cast-in-place concrete building roof, makes reinforcing bar mixedThe inner reinforced concrete hollow floor that forms the cast-in-place rib of the two-way grid of certain intervals of solidifying Tulou lid. Thin-walled square chest skyHeart superstructure significantly find time concrete, alleviate floor deadweight, increase the distance of reinforcing bar to cross-sectional neutral axis, thereby significantly increasingThe bending rigidity that has added floor, has reduced amount of reinforcement. Thin-walled square chest is a kind of full built-in core mould, and it is a kind ofThe thin-walled hollow small size of square or rectangular is totally-enclosed without through hole casing. Thin-walled square chest can show in operative constraintThe distortion of pouring concrete, have advantages of lightweight, intensity is high.
Thin-walled square chest hollow building cover core adopts solid or hollow light material to make conventionally, and the surrounding of core is completeSealing. When construction thin-walled square chest hollow building cover, first build support body support system, secondly template is placed on to frameIn body support system, and in template, carry out the setting-out of core location, then above template the end of colligation hollow building coverMuscle and dark beam steel, lay several cores (core is shelved in template by cushion block) in template equal intervals subsequently,In order to prevent in concreting process, core upwards floats or towards surrounding occurred level displacement, at coreTop arranges Anti-floating reinforcing steel bar, all punchings in the template that is positioned at the peripheral surrounding of each thin-walled square chest conventionally, then adoptSteel wire is fixed on Anti-floating reinforcing steel bar net sheet in support body support system through template. But, this core floating that preventsThere is following defect with the method for horizontal shift:
(1) steel wire is fixed on Anti-floating reinforcing steel bar net sheet in support body support system through template, and the length of steel wire is longer,And the bending rigidity of Anti-floating reinforcing steel bar is little, cause anti-floating weak effect, affect construction quality.
(2) core quality is light, and in the time of concreting, easily occurred level is shifted, and is positioned at the steel of core surroundingThe horizontal shift of the more difficult control core of silk, so, further affects construction quality.
(3) the quantity of steel wire is many, and correspondingly, the quantity of punching in template is also more, so that template cannot reuse,Improve construction cost.
(4) the fixing point position of steel wire in Anti-floating reinforcing steel bar net sheet and support body support system is more, punches in template in additionQuantity many, increased labor strength, waste time and energy, construction speed is slow, has reduced efficiency of construction.
Summary of the invention
First object of the present invention be to provide a kind of construct simple, anti-floating is effective, can better control coreHorizontal shift, raising construction quality, the template recycling rate of waterused that improves, reduction hand labor intensity, raising constructionThe thin-walled square chest hollow building cover core of efficiency.
Second object of the present invention is to provide a kind of anti-float method of above-mentioned thin-walled square chest hollow building cover core.
First object of the present invention is to realize by following technical measures: the hollow building of a kind of thin-walled square chestCover core mould, it is one to have the blocks of hollow cavity, it is characterized in that: on described core, be provided with for willLiquid inject core can folding liquid injection hole, on the bottom surface of described core, be evenly equipped with at least three for supportingBearing in template, and on the bottom surface of core, be also provided with discharge for liquid in by core can folding pipeShape outage, described outage extends in template.
Principle of the present invention is: realize core resisting in concreting process by increasing the weight of coreThe object floating and level of control is shifted. Specifically by liquid injection hole to filling liquid in core, in concretingCheng Zhong, controls concreting speed and makes concrete buoyancy be less than the gross weight of core and filling liquid, to realizeAnti-floating object. The present invention constructs simply, anti-floating is effective, can control preferably the horizontal shift of core, carriesHigh construction quality; In addition, compared with the anti-float method of existing core, due to without punching in template, a sideFace, has improved the recycling rate of waterused of template, has reduced construction cost, on the other hand, due to saved steel wire andAnti-floating reinforcing steel bar, without fix steel wire in Anti-floating reinforcing steel bar and support body support system, has significantly reduced workman's laborFatigue resistance, has improved efficiency of construction simultaneously greatly; Further, the present invention, owing to carrying bearing, therefore can pass throughBearing is directly shelved in template, compared with existing employing cushion block support core, because saved cushion block, therebyWithout using extra anti-floating building materials, and for injecting recyclable the recycling of liquid of core, enterOne step has reduced construction cost.
As a modification of the present invention, described bearing be erect body, the hollow cavity of described core withSeat communicates, and the plug that is provided with this mouth of pipe of shutoff on the lower nozzle of described bearing is stifled, at least one among described bearingIndividual as described outage.
For when the concreting, concrete can be filled into the space of core below smoothly, improves superstructureGlobality, as a further improvement on the present invention, described core is provided with the pouring hole of vertical perforation core, andDescribed pouring hole periphery is airtight toroidal cavity, and described toroidal cavity is the hollow cavity of described core. MixedSolidifying soil can be poured into smoothly from pouring hole the space of core below.
The present invention can also do following improvement, described pouring hole from middle part respectively towards the end face of core and bottom surface byFlaring is large.
As a kind of preferred embodiment of the present invention, described liquid injection hole is positioned on the end face of described core. ConvenientTo filling liquid in core, be also convenient to regulate the injection rate of liquid.
Second object of the present invention is to realize by following technical measures: a kind of above-mentioned thin-walled square chest skyThe anti-float method of heart superstructure core, is characterized in that comprising following concrete steps:
(1) core is shelved on by bearing in the template being positioned in support body support system;
(2) open liquid injection hole, by liquid injection hole to filling liquid in core;
(3) close liquid injection hole, the gluten of colligation hollow building cover, then casting concrete, be subject to the core that fills liquidTo concreting time the buoyancy that produces be less than the gross weight of core and liquid, to fill the core of liquidThe buoyancy that opposing produces when concreting is controlled self horizontal shift simultaneously;
(4) after concrete reaches intensity, remove support body support system and template;
(5) open outage, the liquid in core is discharged.
As one embodiment of the present invention, before core filling liquid, according to the concrete speed of buildingThe weight of degree and core is calculated the injection rate of liquid.
As another embodiment of the invention, before casting concrete, according to core and filling liquidWeight is calculated concrete speed of perfusion.
Concrete of the present invention reaches intensity and refers to that concrete reaches initial set or reaches design strength.
Concrete speed of perfusion 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 present invention is: realize core in concreting process by increasing the weight of coreThe object of anti-floating and level of control displacement. Specifically by liquid injection hole to filling liquid in core, in concretingIn process, control concreting speed and make concrete buoyancy be less than the gross weight of core and filling liquid, with realityExisting anti-floating object. The present invention constructs simply, anti-floating is effective, can control preferably the horizontal shift of core,Improve construction quality.
(2) compared with the anti-float method of anti-float method of the present invention and existing core, due to without punching in template, oneAspect, has improved the recycling rate of waterused of template, has reduced construction cost, on the other hand, and owing to having saved steel wireAnd Anti-floating reinforcing steel bar, without fix steel wire in Anti-floating reinforcing steel bar and support body support system, significantly reduce workman'sLabour intensity, has improved efficiency of construction simultaneously greatly.
(3) core of the present invention, owing to carrying bearing, therefore can directly be shelved in template by bearing, with existingAdopt cushion block to support core and compare, because saved cushion block, thereby without using extra anti-floating building materials, andAnd for injecting recyclable the recycling of liquid of core, further reduce construction cost.
(4) core of the present invention is simple in structure, practical, and cost is low, not only can be suitable in hollow building cover field,Also applicable to other Cast-in-place concrete member, be suitable for extensively promoting and being suitable for.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the upward view of core of the present invention;
Fig. 2 is along B-B line cutaway view in Fig. 1;
Fig. 3 is along A-A line cutaway view in Fig. 1;
Fig. 4 is the schematic diagram that core of the present invention is arranged in hollow building cover.
Detailed description of the invention
As shown in Fig. 1～4, be a kind of thin-walled square chest of the present invention hollow building cover core 1, it is one to have cavityThe blocks of body, is generally square body or cuboid, is provided with for liquid being injected to core 1 on core 1Liquid injection hole 2 that can folding, liquid injection hole 2 is positioned on the end face of core 1, specifically on the aperture of liquid injection hole, is provided withPlug is stifled, realizes the folding of liquid injection hole. On the bottom surface of core 1, be evenly equipped with at least three for being supported on templateBearing 3, in the present embodiment, bearing 3 is four, lays respectively at four corner locations of core, and at coreOn the bottom surface of mould 1, be also provided with for interior core 1 liquid is discharged can folding tubulose outage, outage is stretchedTo template. Core 1 is provided with the pouring hole 4 of vertical perforation core, and pouring hole 4 peripheries are airtight annularCavity, toroidal cavity is the hollow cavity of core, pouring hole 4 from middle part respectively towards the end face of core 1 andBottom surface expands gradually, is bell mouth shape. Be convenient to concrete and can be filled into smoothly core below by pouring hole 4Space, to improve the globality of superstructure.
In the present embodiment, the body of bearing 3 for erectting, the hollow cavity of core 1 communicates with bearing 3,It is stifled 5 that the lower nozzle of bearing 3 is provided with the plug of this mouth of pipe of shutoff, and at least one among bearing 3 be as outage,In the present embodiment, whole bearings all uses as outage.
An anti-float method for above-mentioned thin-walled square chest hollow building cover core, comprises following concrete steps:
(1) build support body support system, template is placed in support body support system, and carry out core in templateLocation setting-out, then above template end muscle 6 and the dark beam steel of colligation hollow building cover, subsequently first-class of templateApart from laying several cores 1, core 1 is shelved on by bearing 3 in the template being positioned in support body support system;
(2) open liquid injection hole 2, by liquid injection hole 2 to the interior filling liquid of core 1; To core 1 filling liquid itBefore, calculate the injection rate of liquid according to the weight of concrete speed of perfusion and core 1, or building coagulationBefore soil, calculate concrete speed of perfusion according to the weight of core 1 and filling liquid.
(3) close liquid injection hole, the gluten 7 of colligation hollow building cover 8, then casting concrete, make to fill the core of liquidBe subject to concreting time the buoyancy that produces be less than the gross weight of core and liquid, to fill the core of liquidThe buoyancy producing when mould opposing concreting is controlled self horizontal shift simultaneously;
According to " construction handbook ", the pressure criteria value of young concrete to template side (adopts pervibrationWhen device), calculate according to following two formula, and get according to the smaller value of these two formula result of calculations:
F＝0.22γct0β1β2V1/2Formula (1)
F＝γcH formula (2)
In formula, F is the maximum lateral pressure to template, kN/m2；γcFor concrete force density, kN/m3；t0For the presetting period of young concrete, h, can determine by actual measurement. In the time lacking testing data, can adopt t0＝200/ (T+15) calculating (T is concrete temperature, DEG C); V is concrete speed of perfusion, m/h; H isConcrete lateral pressure calculating location place is to the total height of young concrete end face, m; β1For additive impact is revisedCoefficient, gets 1.0 while not mixing additive, while mixing the additive with deferred action, get 1.2; β2For Control Measures for Concrete SlumpDegree affects correction factor, in the time that the slump is less than 30mm, gets 0.85, and the slump is 50mm～90mmTime, get 1.0, when the slump is 110mm～150mm, get 1.15.
In the present embodiment, liquid is selected the water of cost cheapness, pours water until by liquid injection hole spilling water. AlsoCan select other liquid. Concrete speed of perfusion is less than or equal to 0.15m/h. In the present embodiment, mixedSolidifying native speed of perfusion is 0.15m/h, does not add additive, and the concrete initial set time is 3.5h, and the slump is150mm. Adopt formula (1) (2) to calculate F with formula, the buoyancy that core is subject toF＝0.22×24×3.5×1.0×1.15×0.151/2＝8.23kN/m2, the buoyancy F=8.23kN/m of the core calculating2Be less than the deadweight of water.
(4) reach initial set or reach after design strength until concrete, removing support body support system and template;
(5) open outage, the liquid in core is discharged. Anti-floating can reclaim with the water of crossing.
Embodiments of the present invention are not limited to this, according to foregoing of the present invention, utilize the common skill of this areaArt knowledge and customary means, do not departing under the above-mentioned basic fundamental thought of the present invention prerequisite, and the present invention can also doGo out amendment, replacement or the change of other various ways, within all dropping on rights protection scope of the present invention.
Claims (10)
1. a thin-walled square chest hollow building cover core, it is one to have the blocks of hollow cavity, it is characterized in that:On described core, be provided with for liquid is injected core can folding liquid injection hole, on the bottom surface of described coreBe evenly equipped with at least three for being supported on the bearing in template, and on the bottom surface of core, be also provided with for by coreWhat interior liquid was discharged can folding tubulose outage, described outage extends in template.
2. thin-walled square chest hollow building cover core according to claim 1, is characterized in that: described bearing isThe body of erectting, the hollow cavity of described core communicates with bearing, on the lower nozzle of described bearing, is provided with shutoffThe plug of this mouth of pipe is stifled, and at least one among described bearing is as described outage.
3. thin-walled square chest hollow building cover core according to claim 2, is characterized in that: on described coreBe provided with the pouring hole of vertical perforation core, and described pouring hole periphery is airtight toroidal cavity, described annular is emptyChamber is the hollow cavity of described core.
4. thin-walled square chest hollow building cover core according to claim 3, is characterized in that: described pouring holeExpand gradually towards end face and the bottom surface of core respectively from middle part.
5. thin-walled square chest hollow building cover core according to claim 4, is characterized in that: described liquid injection holeBe positioned on the end face of described core.
6. an anti-float method for thin-walled square chest hollow building cover core claimed in claim 1, is characterized in that bagDraw together following concrete steps:
(1) core is shelved on by bearing in the template being positioned in support body support system;
(2) open liquid injection hole, by liquid injection hole to filling liquid in core;
(3) close liquid injection hole, the gluten of colligation hollow building cover, then casting concrete, be subject to the core that fills liquidTo concreting time the buoyancy that produces be less than the gross weight of core and liquid, to fill the core of liquidThe buoyancy that opposing produces when concreting is controlled self horizontal shift simultaneously;
(4) after concrete reaches intensity, remove support body support system and template;
(5) open outage, the liquid in core is discharged.
7. anti-float method according to claim 6, is characterized in that: before core filling liquid,Calculate the injection rate of liquid according to the weight of concrete speed of perfusion and core.
8. anti-float method according to claim 6, is characterized in that: before casting concrete, according toThe weight of core and filling liquid is calculated concrete speed of perfusion.
9. according to the anti-float method described in claim 7 or 8, it is characterized in that: described concrete reaches intensityRefer to that concrete reaches initial set or reaches design strength.
10. anti-float method according to claim 9, is characterized in that: described concrete speed of perfusionBe 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 |
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| 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 |
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| CN105604317A true CN105604317A (en) | 2016-05-25 |
| CN105604317B CN105604317B (en) | 2018-02-06 |
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Cited By (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 |
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| 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 |
Cited By (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 |
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| CN105604317B (en) | 2018-02-06 |
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Address after: No.97 Liuhua Road, Liwan District, Guangzhou City, Guangdong Province 510010 Patentee after: Guangdong Architectural Design and Research Institute Co., Ltd Address before: Guangzhou City, Guangdong province 510010 Liuhua Road No. 97 Patentee before: ARCHITECTURAL DESIGN Research Institute OF GUANGDONG PROVINCE |