CN103388400A - Construction method of reinforced and hard hollow slab core mould of permanent-arrangement fireproof outer casing - Google Patents
Construction method of reinforced and hard hollow slab core mould of permanent-arrangement fireproof outer casing Download PDFInfo
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- CN103388400A CN103388400A CN2012101444693A CN201210144469A CN103388400A CN 103388400 A CN103388400 A CN 103388400A CN 2012101444693 A CN2012101444693 A CN 2012101444693A CN 201210144469 A CN201210144469 A CN 201210144469A CN 103388400 A CN103388400 A CN 103388400A
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Abstract
The invention discloses a reinforced and hard hollow slab core mould of a permanent-arrangement fireproof outer casing and a construction method thereof. The core mould comprises longitudinal and transverse well-shaped permanent arrangement areas and four symmetrical cross slots along the core mould. A bottom plate of a hollow slab is additionally provided with four hidden beams, so the prestress of the bottom plate is increased, the service life is prolonged, and the load capability is improved. The hollow slab core mould has the advantages that the weight is light, the sound isolation, heat insulation and fireproof effects are good, the reliability and the earthquake-proof and cracking-resistant performances of the structure are better, the construction is convenient, and the economy and the practicality are better.
Description
Technical field
The present invention relates to the floor system in a kind of reinforced concrete structure, belong to buildings in general structure field.
Background technology
At building field, along with the large-span concrete structure is increasing, increasing floor adopts the hollow floor structure technology, in the hollow building cover field, also emerges numerous innovative technologies.Patented technology " thin wall cylinder filling type cast-in-situ concrete tubular, hollow floor " (ZL99232922.1) discloses a kind of thin wall cylinder is applied in cast-in-situ concrete technology; " a kind of steel bar concrete tubulose light floor " (ZL01140463.9), " a kind of steel bar concrete tubulose light floor " (ZL01140466.3) and " a kind of cast-in-place concrete cored " (application number 200510067584.5) continue the application in cassette ceiling to the tubulose filler and innovate." a kind of large span prestressing without bondn cast-in-place hollow slab " (ZL00264800.8), " a kind of large span bonded prestress cast-in-place hollow slab " (ZLZ03236960.3), " in-situ deposited prestressed hollow reinforced concrete roof and job practices thereof " (ZL00113548.1) and " in-situ deposited prestressed hollow reinforced concrete roof and job practices thereof " (ZL00113550.3) etc. included prestressed characteristics in patented technology, expanded the range of application of hollow building cover." a kind of grid of fixedly filling tube and hollow building cover thereof " (ZL200520112551.3) proposes a kind of the tubulose filler is combined and is applied to the hollow building cover novel structure, greatly reduced the workload of execute-in-place, facilitated construction.Above technology is mainly used in the one-way slabs structure, make tubulose (or bar-shaped) filler to apply in two-way slab, and what at first will solve is along pipe direction and the inconsistent problem of cross tube direction mechanical property." by the prestressed concrete cast-in-place hollow slab of light material assembled unit filling " is (ZL03146341.X) with light material assembled unit " direction that arranged direction will be larger with moment of flexure in plate is consistent ", overcome the bad shortcoming of cross tube direction mechanical property, reached good effect." in-situ cast hollow reinforced concrete slab pre-provided with hollow hard thin-wall members and job practices thereof " (ZL99115648.X) and other similar patent, take " have between the two ends of cavity hard thin-wall members and Cast-in-place concrete end that the vertical rib of component cast-in-situ concrete intersects between rib; between the Cast-in-place concrete end, rib on the same straight line, forms rib between the elongated end of Cast-in-place concrete crossing with the vertical rib of many Cast-in-place concretes." way, the part niobium has been mended the bad defect of cross tube direction mechanical property, also can be applied to two-way slab.But ZL03146341.X requires " dark beam to be set to be the needs for the arrangement prestress muscle, to can be used as again the line of demarcation towards different adjacent assembled units; Dark beam stirrup can carry out Horizontal limiting to assembled unit, can also improve shearing resistance and the punch resistant capability of plate simultaneously." therefore be applicable to the hollowcore slab that span surpasses 350mm greater than prestressed cored slab or the thickness of 12m.Because span is large or thickness of slab when larger, because the shear resistance of board concrete is not enough, considering from structure stress will the shearing resistance stirrup, so configure dark beam steel (stirrup), can not bring too many trouble to construction.If when both direction had dark beam steel (stirrup) during less than 350mm when hollowcore slab thickness, construction is trouble especially.In ZL99115648.X, because packing material is all arranged in a direction, the technical scheme that its solution bidirectional stress is taked is that rib between end is set; From the mechanics angle, between end, rib only reaches the problem of wanting certain width could effectively solve cross tube direction shear resistance deficiency, and between wide end, rib will reduce the hollow rate of plate equally.In this case, develop a kind of above deficiency of avoiding, the high and easy construction of hollow rate, can be applied to tubulose (or bar-shaped) filler the structure technology of 180-350mm thickness hollowcore slab, become current builing industry urgent problem.In order to solve traditional hollowcore slab bottom without girder and the low shortcoming of weight bearing power, should be with the tubulose filler side of changing into body shape filler, and at square body filler configured slot beam, make the hollow building cover base plate strengthen prestressing force and increase load force.
Summary of the invention
According to concrete mechanics principle and experimental data as can be known: " in the hollowcore slab that tubulose (or bar-shaped) filler is filled; the anti-bending strength along pipe direction (referring to the length direction along filler) and cross tube direction (referring to the cross-sectional direction along filler) is very nearly the same; but shear behavior differs greatly, and along the shear-carrying capacity of managing direction, is 2 times of cross tube directions at least." purpose of the present invention is exactly in order to solve in the hollowcore slab that tubulose (or bar-shaped) filler fills; the technical problem of the shear-carrying capacity deficiency of cross tube direction hollowcore slab; for fear of shear failure occurring; give full play to hollowcore slab along the good advantage of pipe direction shear behavior; with tubulose (or bar-shaped) the filler side of changing into body filler; make the load force direction of transfer average mark of floor be placed in surrounding, and after the primary concreting concrete, right four girders at the interior end again, strengthen life-span and the weight bearing power of hollow building cover base plate, greatly simplified construction technology.The invention provides a kind of hollow floor structure form and implementation method that namely meets mechanics principle, easy construction again.
For achieving the above object, the technical solution used in the present invention is:
A kind of arrangement permanent flameproof case is strengthened the job practices of the cassette ceiling core spare of hard, the steps include:
(1) lay template and on template subregion " well " beam girder of wire-tiing, mark off vertical arrangement permanent core spare zone and lateral arrangement permanent mandrel spare in the zone that reinforcing bar " well " beam surrounds regional;
(2) the plate face reinforcing bar of the longitudinal rib reinforcing bar of colligation core spare surrounding and horizontal bar reinforcing bar;
(3) placement is modular prefabricated in the concrete steel muscle surrounds the hole, side of " well " font in length and breadth;
(4) the anti-floating system is installed, in well four bottoms, limit, with screw, follows closely on template, fasten iron wire;
(5) place core spare in well, use mounted iron wire colligation core spare in advance;
(6) iron on the colligation floor steel bar;
(7) concreting, start to water Man Houzai in surrounding and watering the middle hollow core hole of core spare from the position between core spare and core spare;
(8) stripping.
The height of the described prefabricated component of step (3) is 50～100mm.
After adopting such scheme, the present invention compared with prior art has following beneficial effect;
Workload when the present invention has greatly reduced construction, widened the range of application of square body filler in superstructure simultaneously, can be advantageously applied to single, double in plate.User's body filler can meet the technological requirement of once-pouring of concrete moulding in superstructure, does not need to configure again stirrup simultaneously in plate, has simplified construction technology, greatly accelerates the construction speed of hollow building cover.A kind of permanent hollow floor cover plate core spare proposed by the invention and implementation method thereof meet mechanics principle, can give full play to the stress-bearing capability of member, reach the purpose that reduces to greatest extent material usage, thereby obtain good economic benefit.The hollowcore slab of a kind of permanent cassette ceiling core spare of the present invention is lightweight, fire prevention, sound insulation, good heat-insulation effect, and reliability of structure, shock resistance, crack resistance are also better.The present invention has good economy and applicability, and the development of Building technology is played a driving role.
Description of drawings
Fig. 1 is the cross-sectional drawing of the hollow core of the present invention.
Fig. 2 is composite core formwork part floor map in the person's character hollowcore slab.
Fig. 3 is composite core formwork part sectional schematic diagram in hollowcore slab of the present invention.
Fig. 4 is internal-rib and interblock rib position view in the wide central layer of the present invention cross section.
Fig. 5 is internal-rib and interblock rib plan-position schematic diagram in hollowcore slab of the present invention.
Fig. 6 is Shear transfer direction schematic diagram in one-way slabs.
Fig. 7 is Shear transfer direction schematic diagram in two-way slab.
Fig. 8 is composite core formwork part drawing of site in one-way slabs.
Fig. 9 is composite core formwork part drawing of site in two-way slab.
Figure 10 is Shear transfer direction and composite core formwork part position stacking chart in one-way slabs.
Figure 11 is Shear transfer direction and composite core formwork part position stacking chart in two-way slab.
Figure 12 is composite core formwork part position and direction arrangement diagram in one-way slabs.
Figure 13 is composite core formwork part position and direction arrangement diagram in two-way slab.
In figure: 1. top reinforcement, 2. lower floor's reinforcing bar, 3 concrete, 4. composite core formwork part, 5. presstressed reinforcing steel, 6. side's body filler, 7. grid, 8. internal-rib, 9. interblock rib, 10. limit bearing, 11.90 the degree straight line, 12. connect the straight line of 90 degree straight-line intersections, 13. fold-line-shapeds, 14. the composite figure of straight line and camber line, 15. circles.
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing.
The present invention realizes in such a way:
At first, lay template and on template subregion " well " beam girder of wire-tiing, mark off vertical arrangement permanent core spare zone and lateral arrangement permanent mandrel spare in the zone that reinforcing bar " well " beam surrounds regional;
Secondly, the longitudinal rib reinforcing bar of colligation core spare surrounding and the space of a whole page reinforcing bar of horizontal bar reinforcing bar;
Again, placement is modular prefabricated in the concrete steel muscle surrounds the hole, side of " well " font in length and breadth;
Again, the anti-floating system is installed, in well four bottoms, limit, with screw, follows closely on template, fasten iron wire;
Then, place core spare in well, use mounted iron wire colligation core spare in advance;
Then, iron on the colligation floor steel bar;
Finally, concreting, start to water Man Houzai in surrounding and watering the middle hollow core hole of core spare from the position between core spare and core spare;
(8) stripping.
The height of the described prefabricated component of step (3) is 50～100mm.
Core spare center is " mouth " font, the panel and the base plate that connect up and down hollow building cover, " mouth " font connects four grooves makes base plate font after pouring concrete form " ten " font girder, the convex flat face of core spare is used for kissing connecing on little cement pedestal bundlees convenient installation of core spare, and the edge of core spare is to being provided with vertical arrangement permanent concrete girt strip and the permanent girt strip of lateral arrangement.
Thickness 100～the 650mm of core spare.
In Fig. 1, hollowcore slab thickness is 250-850mm, hollowcore slab comprises that top reinforcement 1, lower floor's reinforcing bar 2, concrete 3, core spare 4, core spare 4 are between top reinforcement 1 and lower floor's reinforcing bar 2, permanent being embedded in concrete 3, when the hollowcore slab span is large or load when larger, can be in piece vertical arrangement permanent zone 8 and lateral arrangement permanent area 9 configuration presstressed reinforcing steel 5.
Fig. 2, embodiment illustrated in fig. 3 in, core spare 4 is connected with the groove 7 of all directions direction and is pressed from both sides into four square convex flat faces by square hole 6, form little hidden beam 71 after the mixed earth of the interior pouring of square hole 6, form girder 72 after the mixed earth of the interior pouring of groove 7, girder 72 is crosswise.
In the embodiment shown in fig. 4, establish vertical arrangement permanent zone 8 and lateral arrangement permanent area 10 in hollowcore slab between adjacent core module 4, vertically the width of arrangement permanent zone 8 and lateral arrangement permanent area 9 is 50-100mm.
In the embodiment shown in fig. 5, vertically arrangement permanent zone 8 is connected with form of straight lines 4 limit bearings 10 that plate is relative with lateral arrangement permanent area 9.
In one-way slabs design process embodiment illustrated in fig. 6, load (shearing) directly transmits to 4 limit bearings and girder balance 10.
In two-way slab design process embodiment illustrated in fig. 7, load (shearing) is with simultaneously and the 90 degree straight lines 11 that intersect of 4 adjacent edge bearings 10, and the straight lines 12 that connect 90 degree straight-line intersections are as line of demarcation, respectively to 4 limit bearings 10 by the vertical direction transmission.
In the embodiment shown in fig. 8, along the direction parallel with Shear transfer, be provided with vertical arrangement permanent zone 8 and lateral arrangement permanent area 9 between core spare 4, vertically arrangement permanent zone 8 and lateral arrangement permanent area 9 form a kind of and core spare 4 towards identical parallel shape structure.
In two-way slab embodiment illustrated in fig. 9, be provided with vertical arrangement permanent zone 8 and lateral arrangement permanent area 94 of core spares, vertically arrangement permanent zone 8 and lateral arrangement permanent area 9 form a kind of orthogonal fenestral fabric.
Figure 10, embodiment illustrated in fig. 11 in, respectively Shear transfer direction in one-way slabs and two-way slab and core spare 4 positions are superposeed, thus determine every core spare towards.
Figure 12, embodiment illustrated in fig. 13 in, press core spare 4 towards arrange respectively core spare 4 in one-way slabs and two-way slab.
A kind of arrangement permanent flameproof case of the present invention is strengthened the implementation method of the cassette ceiling core spare of hard:
(1) lay template and on template subregion " well " beam girder of wire-tiing, mark off vertical arrangement permanent core spare zone and lateral arrangement permanent mandrel spare in the zone that reinforcing bar " well " beam surrounds regional;
(2) the plate face reinforcing bar of the longitudinal rib reinforcing bar of colligation core spare surrounding and horizontal bar reinforcing bar;
(3) placement is modular prefabricated in the concrete steel muscle surrounds the hole, side of reinforcing bar " well " font in length and breadth;
(4) the anti-floating system is installed, in well four bottoms, limit, with screw, follows closely on template, fasten iron wire;
(5) place core spare in well, use mounted iron wire colligation core spare in advance;
(6) iron on the colligation floor steel bar;
(7) concreting, start from the position between core spare and core spare watering the middle hollow core hole of core spare after surrounding is watered completely;
(8) stripping.
Claims (2)
1. the job practices of the cassette ceiling core spare of an arrangement permanent flameproof case reinforcement hard, the steps include:
(1) lay template and on template subregion prick " well " beam girder, mark off vertical arrangement permanent core spare zone and lateral arrangement permanent mandrel spare in the zone that " well " beam surrounds regional;
(2) the plate face reinforcing bar of the longitudinal rib reinforcing bar of colligation core spare surrounding and horizontal bar reinforcing bar;
(3) placement is modular prefabricated in the concrete steel muscle surrounds the hole, side of " well " font in length and breadth;
(4) the anti-floating system is installed, in well four bottoms, limit, with screw, follows closely on template, fasten iron wire;
(5) place core spare in well, use mounted iron wire colligation core spare in advance;
(6) iron on the colligation floor steel bar;
(7) concreting, start to water Man Houzai in surrounding and watering the middle hollow core hole of core spare from the position between core spare and core spare;
(8) stripping.
2. arrangement permanent flameproof case according to claim 1 is strengthened the job practices of the cassette ceiling core spare of hard, and it is characterized in that: the height of the described prefabricated component of step (3) is 50～100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101444693A CN103388400A (en) | 2012-05-09 | 2012-05-09 | Construction method of reinforced and hard hollow slab core mould of permanent-arrangement fireproof outer casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101444693A CN103388400A (en) | 2012-05-09 | 2012-05-09 | Construction method of reinforced and hard hollow slab core mould of permanent-arrangement fireproof outer casing |
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| Publication Number | Publication Date |
|---|---|
| CN103388400A true CN103388400A (en) | 2013-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012101444693A Pending CN103388400A (en) | 2012-05-09 | 2012-05-09 | Construction method of reinforced and hard hollow slab core mould of permanent-arrangement fireproof outer casing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005499A (en) * | 2013-12-24 | 2014-08-27 | 董晓波 | Manufacturing technology of BOAO hollow floor bar-mat reinforcement sandwiching light mandrel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2509257Y (en) * | 2001-12-29 | 2002-09-04 | 李佩勋 | Cast-in-situs prestress concrete integral composite flat slab |
| CN101294433A (en) * | 2008-06-20 | 2008-10-29 | 宫海西 | Self-positioning permanent internal mold for cast-in-situ reinforced concrete structure and construction method thereof |
| CN101314970A (en) * | 2008-07-18 | 2008-12-03 | 王本淼 | Cast-in-situ section steel concrete cavity building roof |
| US20090217612A1 (en) * | 2005-10-08 | 2009-09-03 | John Window | Modular Composite Floor Units |
-
2012
- 2012-05-09 CN CN2012101444693A patent/CN103388400A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2509257Y (en) * | 2001-12-29 | 2002-09-04 | 李佩勋 | Cast-in-situs prestress concrete integral composite flat slab |
| US20090217612A1 (en) * | 2005-10-08 | 2009-09-03 | John Window | Modular Composite Floor Units |
| CN101294433A (en) * | 2008-06-20 | 2008-10-29 | 宫海西 | Self-positioning permanent internal mold for cast-in-situ reinforced concrete structure and construction method thereof |
| CN101314970A (en) * | 2008-07-18 | 2008-12-03 | 王本淼 | Cast-in-situ section steel concrete cavity building roof |
Non-Patent Citations (1)
| Title |
|---|
| 李红庆等: "BDF箱体在现浇混凝土空心楼盖中的应用", 《宁夏工程技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005499A (en) * | 2013-12-24 | 2014-08-27 | 董晓波 | Manufacturing technology of BOAO hollow floor bar-mat reinforcement sandwiching light mandrel |
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Application publication date: 20131113 |