CN85102720B - Overlap prefabrication large prestressed reinforced concrete archroof slab in situ - Google Patents
Overlap prefabrication large prestressed reinforced concrete archroof slab in situInfo
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- CN85102720B CN85102720B CN 85102720 CN85102720A CN85102720B CN 85102720 B CN85102720 B CN 85102720B CN 85102720 CN85102720 CN 85102720 CN 85102720 A CN85102720 A CN 85102720A CN 85102720 B CN85102720 B CN 85102720B
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- plate
- lamination
- suo shu
- insulation layer
- arch
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Abstract
The present invention relates to a large prestressed reinforced concrete arched roof slab produced in a site stacking mode, which is in a structure of a roof for building engineering. Compared with a common folded plate, a shell plate or an arched plate, the present invention has the advantages that on-site stacking prefabricating is carried out, a post-tensioning prestressing force reinforcing bar is adopted, and the produced slab can be directly hoisted and positioned. A pedestal is prefabricated and produced in a simplified mode, a special vehicle transporter component is not needed, and the comprehensive manufacturing cost of the engineering is reduced. The roof slab of the present invention is suitable for industrial buildings of light industry, textile industry, mechanical industry, etc. and large-sized culture buildings, and the structural shape and the stacking production condition of the roof slab are shown in the figure.
Description
The invention belongs to the roof structure of construction work
Make the roofing of building with the large plate of prefabricated prestressed reinforced concrete " grillage unification ", because its mechanical property is good, structure function reasonable, save raw material, so development is very fast, template kind is a lot, as flap, various coverboard, arch bar etc.But these large plates all must be produced with special prestressing bed and mould in fixing prefabricated place or factory, and then transport engineering site to special vehicle and carry out assembledly could using with installation.Adopt these large plates to make roofing, although the material of large plate itself can be saved, the investment of pre-tensioned prestressing pedestal and the transport of large-scale large board member, still will roll up construction costs.The transport of especially large build large board member often will run into very large difficulty, all the more so under China's current conditions.
" shape of a saddle coverboard " commonly used.Its form of structure is fine, and the cross-over configuration of prestressed reinforcement is also very reasonable, but its shortcoming is in fixing place or factory, to carry out short-term prestressed stretch-draw could produce by pre-tensioned prestressing technique on the independent pedestal of single member.Although also can overlappingly produce in the time that span is less than 12 meters, span is slightly large just can only produce by monolithic, and complex forming technology.In the time transporting on-the-spot use to, no matter stack or the formal bearing of installing temporarily, must be all shaped form.So adopt this large plate, restrictive condition is a lot, can not obtain desirable economic effect.
Folding " flap ".It is the roof panel that a kind of scope of application is very wide.Its production technology is more reasonable, the way that first adopts lamination to produce, on prestressing force long-line pedestal, produce side by side two steel concrete plates that are bound up with transverse reinforcement, reach after intensity at concrete, cut off longitudinal prestressing steel wire, then successively two block concrete flat plate foldings are got up, transport engineering site to and use.But remaining, its shortcoming must on fixing prestressing bed, use pre-tensioned prestressing explained hereafter; Carry out the transport of semiproduct member; Prefabricated broken line bearing, in order to control the shape of flap; After opening on the roofing of flap, carry out strict cementation of fissures processing, just can become a complete primary structure member.So, the whole working procedure complexity of this large plate, operating technology requires very high, and architectural image is also attractive in appearance not.
The mechanical property of prefabricated this large plate of prestressing force flute profile arch bar (the large plate of к ж c of the Soviet Union) is fine, can give full play to the characteristic of concrete compression, reinforcing bar tension, and it is very large that span can be done.Must be in prefabricated factory pre-tensioned prestressing tension reinforcing steel bar, moulding in special punching block but its shortcoming also remains.Then transporting engineering site to special vehicle uses.It not only can not overlappingly be produced, and can not transport and stack by lamination, and the production, the stacking place that take are very large.So although its good plate cut is used the restriction that is still subject to production, transport, stacks condition, cost is very high.
Therefore, these large plates of current use, no matter template and production technology, all needs to continue Improvement.
The transport that the object of the invention is to cancel large-scale large board member is main target, rational structural shape and production technology simply and easily are organically combined, createing can be using the new template that on-the-spot lamination is produced, directly lifting is used, to obtain best economic effect.
In particular, be exactly will be in further investigation lamination production theory, grasp under the prerequisite of lamination production law, very reasonably " grillage unification " prestressed slab of stress form, all be designed to the form of structure of the overlapping production of energy, and adopt the way of post-tensioned prestressing to carry out arrangement of reinforcement, to reduce to greatest extent production floor space and simplify and produce pedestal, reach and can use scene by the requirement of Hoisting Position in engineering, the simple and easy production pedestal of flexible arrangement, make the member that is about to produce, can just can directly lift without transport the object of use.So just can save in a large number the transport cost that pre-tensioned prestressing is produced the investment of pedestal and saved whole large-scale components.
Key technology of the present invention is will be by aforementioned object, designs large plate template and the concrete moulding process that solves these large plates can lamination produced, and the collocation method of post-tensioned prestressed reinforcement in overlapping production member.
Lamination is produced the design of large plate cross sectional shape:
Some simple plane institution movements or single curve or broken line member are successively superimposed together, and to produce be easily, but, some can be met to each side mechanical property requirements, complex-shaped large panel structure, in the longitudinal and transverse two directions production that is all superimposed together closely, and each member span of producing is equated, shape is identical, the size at each position is all just the same, just must further investigate the rule of overlapping production, the strict design principles of grasping, that is: in the time that cross section is curved surface, the upper surface in cross section and the curvature of soffit must be identical; Vertical line is made in arbitrfary point to whole member, and member upper surface and the soffit distance of two crossing with this vertical line is a constant, and this constant is exactly the thickness that member lamination is produced, the height of each template vertical-lift while namely production.
One of key of the present invention is in the time that member section designs, adopt the way that plate face thermal insulation layer material and arch bar plate surface concrete are constructed simultaneously, adjust the concrete cross sectional shape of large panel structure with these materials, reach the upper surface curve in arch bar cross section is equated completely with the bent curvature of a curve of soffit, make can be close to the effect that lamination is produced between member.
Lamination is produced the design of large plate post-tensioned prestressed reinforcement:
For the lamination that makes to design is produced the large plate of prestressed reinforced concrete, can use scene to need flexible arrangement production pedestal to reach the object of not carrying out component conveying by lifting, just must cancel fixing pre-tensioned prestressing pedestal, adopt post-tensioned prestressing arrangement of reinforcement technique.But the configuration of post-tensioned prestressed reinforcement, can not penetrate the concrete component that lamination is produced, must successively separate.So these post-tensioned prestressed reinforcements can only be arranged on lamination and produce the member both sides that are over, and adopt the form exposing, after large plate is installed, then grouting protection in preformed plate seam, as shown in Fig. 1 (A).For ensureing plate wide installation dimension, the short bracket of anchoring prestress reinforcing bar can not stretch out outside plate, therefore the anchor head of prestressed reinforcement is what to enter with anchoring in the wide short bracket equating of plate after end horizontal bending, as shown in Figure 1.
There are eight kinds of following three classes by the template of mentioned above principle design:
Two-hinged arch with pull bar:
Be close to lamination and produce, band insulation layer, anti-flute profile arch bar, Fig. 2.
Be close to lamination and produce, band insulation layer, square-section arch bar, Fig. 3.
Be close to lamination and produce, be not with insulation layer, the anti-flute profile arch bar that plate face is grid beams, Fig. 4.
Integral channel plate arch:
Be close to lamination and produce, band insulation layer, frid arch, Fig. 5
Be close to lamination and produce, be not with insulation layer, the frid arch that plate face is grid beams, Fig. 6.
Two-way micro-arched:
Be close to lamination and produce, be not with insulation layer, two-way micro-arched, Fig. 7.
Be close to lamination and produce, band insulation layer, two-way micro-arched, Fig. 8.
Be close to lamination and produce, be not with insulation layer, plate face is grid beams two can be micro-arched, Fig. 9.
The form of structure of these large plates, mechanical property, moulding process are different, so their pluses and minuses and the scope of application are also different.As
With the large plate of two-hinged arch of pull bar, its moulding process is simple, and template construct is convenient, but because lower edge is the flexible steel bar rod exposing, so be only relatively applicable to various storehouses, factory building without crane.
Integral channel plate arch, its mechanical property is fine, handsome in appearance, so the scope of application is very wide, no matter storehouse, factory building, public building can be suitable for, and span can do very large.But its template and moulding process more complicated, construction level is had relatively high expectations.
Two-way micro-arched, the mechanical property of this arch bar is fine, and moulding is also fine, and moulding process is simple, and mould materials are economized very much, but it must supported along four sides, so can only be used for having the structure of supported along four sides condition.
Wind up as the various large plate of grid beams, its architectural image is all better, the building that can be used for having relatively high expectations.Owing to there is no concrete plate surface, plate is heavy lighter, can strengthen so plate is wide.But the frame mould materials that form grid beams are a lot, construction is inconvenient.
These large plates have a common great advantage, the roofing good integrity after building up exactly, and antidetonation evil ability is strong, and area of application is unrestricted.
Lamination is produced the moulding process of large plate, because template is different, so different templates is had to different moulding process, is summed up and can divides following three kinds:
With insulation layer be close to lamination production technology, the member of producing all fits together closely.The concrete practice is to produce pedestal for common brick, dry sand to fill out block and form, then smears mortar on surface and make loose tool.Forming panel only has two side forms, and bed die is the upper surface of lower floor's member of having produced of utilization, in overlapping manufacturing process, as long as successively promote two side forms, just can produce each layer of member.Between every layer of member, separate with interleaving agent.All member is produced and is over.Concrete curing reaches after design strength, unified post-tensioned prestressed reinforcement, the successively stretch-draw anchor installed.Finally concentrate and carry out lifting component.Such plate can be close to the essential condition that lamination is produced, and is to make insulation layer with cement expanded perlite, has filled the thickness of plate face, has played and has made large plate both with insulation layer, the effect of again can lamination producing.
Be close to lamination and produce two-way micro-arched sheet metal forming technique.This plate does not have lateral plates, and the area of upper face is very large, is two-way micro-song, and dimensional requirement is accurate.Because the area of upper surface is very large, adopting template or movable steel mould bases to carry out moulding does not all have possibility.So the moulding process of this plate is to take, on the frame punching block of large plate surrounding, to install respectively four micro-arched,, draws and scrapes surperficial concrete formation respectively along micro-arched of two opposite side with length scraper plate.The mould of whole technique is very simple, easy to operate, and size is accurate.Other relevant technological is all identical.
Production technology when being close to lamination and producing the upper string board face of various templates and be grid beams.Now the template of each grid is the framed of a rectangle, produces with the lamination of each member, successively promotes that this is framed, produces the grid beams of winding up.Grid depth of beam is exactly the height of every layer of member " contour lifting ", needn't carry out with insulation layer the thickness of infill panel face.The architectural image of this plate is attractive in appearance, and the bed board in grid beams can be selected voluntarily as required.
It is that bar structure form and production technology are closely linked and a set of novel roof structure system that produces that on-the-spot lamination is produced prestressed reinforced concrete arched roof plate system, its major advantage is to retain under " grillage unification " former advantageous prerequisite, accomplish again and made the large board member of producing just can directly lift use without any transport, and it is all very simple to produce pedestal, construction equipment and operating procedure, be applicable to China's concrete condition, be convenient to large scale application.
" pilot scale " testing identity, the large panel structure that adopts this lamination at the scene to produce is made roofing, large plate close with form of structure but that lamination is produced is at the scene made comparisons, the consumption of the material of roofing element own is almost equal, but the direct cost of roofworks can reduce by 20～40%, engineering comprehensive cost can reduce by 13～18%, and the duration can shorten 1/3～1/5, economic benefit highly significant.
The more important thing is, it has changed traditional prefabricated large board member must be in fixing prefabricated place or the practice of plant produced, large-scale fixing great Ban production plant, has become and can use the on-the-spot prefabricated factory of small-sized activity moving flexibly with engineering.Therefore, implement the present invention, can not only obtain obvious economic benefit, and there is good development prospect.
Optimum implementation of the present invention:
Press the plane of building, according to crane crane capacity, can be directly large plate be hung on roofing with the production pedestal of arranging the large plate of roofing as starting point, and determine on each pedestal the large plate number of should lamination producing.
At selected production pedestal place, fill out block pedestal with common brick and dry sand, so that after pedestal is removed in the future, common brick, sand still can use as usual.
Two side templates having made are fixed on to pedestal both sides, then in the space between side form and pedestal, water plain mortar (mixing early strength admixture) moulding and produce the loose tool of formal member.
Loose tool mortar reaches after intensity, takes two side forms apart.
In loose tool and template, brush interleaving agent.
The reinforcing bar that colligation is good is installed on loose tool.
By two side forms of designing requirement " contour lifting ", then fixed.
Placing of concrete, with slab tamper, moulding (mixing early strength admixture in concrete) is smash in shake.
At plate surface concrete upper berth heat-insulating heat-preserving material, then smear one deck leveling mortar.
Health 12 hours, reaches 50 at concrete
#after above intensity, take two side forms apart.
The large plate of having produced is continued to use when loose tool, repeat above operation, just each layer of large plate of successively overlapping production.
On each pedestal all large plate all overlapping production be over, at a plate on top layer, health reaches after design strength, can be by designing requirement, system is installed the post-tensioned prestressed reinforcement of all large plates.
With two dual acting oil jack tops, successively carry out the prestressed reinforcement of every plate both sides to carry out symmetrical prestressed stretch-draw and anchoring by the tension stress of design.Until all completions.
Arrangement crane is marched into the arena, and arranges lifting program predetermined while producing pedestal by original, one by one pedestal, successively large plate lifts.
The large plate being installed on roofing is carried out to the grouting of plate seam, and suitably shaken and smash with little shake tamper, ensure that mortar fills up plate seam, reaches the effect of protecting post-tensioned prestressed reinforcement.
All large board member, all finishes from producing to the operation of installing, and other insulation, waterproof work are carried out according to normal procedure.
Claims (10)
1. a prestressed reinforced concrete roof panel for Prefabrication, it is characterized in that at, post-tensioned prestressing arrangement of reinforcement, arching template.
2. according to roof panel claim (1) Suo Shu, it is characterized in that the vertical distance of the arbitrfary point of large board member upper surface and the corresponding points of soffit equates.
3. according to roof panel claim (1) Suo Shu, it is characterized in that adopting heat insulating material to fill.
4. according to roof panel claim (1) Suo Shu, it is characterized in that it can be with insulation layer for the large plate of the two-hinged arch with pull bar, anti-flute profile arch bar or square-section arch bar; Or the anti-flute profile arch bar that not to be with insulation layer, plate face be grid beams;
5. according to roof panel claim (1) Suo Shu, it is characterized in that it can be with insulation layer for integral channel plate arch plate, frid arch; Or be not with insulation layer, the frid that plate face is grid beams encircles;
6. according to roof panel claim (1) Suo Shu, it is characterized in that it can be with insulation layer, two-way micro-arched for two-way micro-arched plate;
Or be not with insulation layer, two-way micro-arched or that plate face is grid beams is two-way micro-arched.
7. according to the on-the-spot lamination method for prefabricating of roof panel claim (1) Suo Shu, while it is characterized in that only making bottom modeling with two side forms and each lower floor member, adopt and successively promote side form, be close to lamination and produce.
8. according to on-the-spot lamination prefabricated room panel claim (7) Suo Shu, it is characterized in that post-tensioned prestressing arrangement of reinforcement is exposed at large board member both sides outward, after large plate installation in position, then grouting protection.
9. according to on-the-spot lamination prefabricated room panel claim (7) Suo Shu, it is characterized in that two-way micro-bent plate of wide area surface to adopt four fixing micro-bent steel arch framves are installed on large plate surrounding frame, then draw, scrape concrete formation along relative two steel arch framves respectively with long scraper plate.
10. according to on-the-spot lamination prefabricated room panel claim (7) Suo Shu, while it is characterized in that large plate upper string board face to be grid beams, while adopting the framed lamination of rectangle to produce, successively promote framed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85102720 CN85102720B (en) | 1985-04-16 | 1985-04-16 | Overlap prefabrication large prestressed reinforced concrete archroof slab in situ |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85102720 CN85102720B (en) | 1985-04-16 | 1985-04-16 | Overlap prefabrication large prestressed reinforced concrete archroof slab in situ |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85102720A CN85102720A (en) | 1986-11-12 |
| CN85102720B true CN85102720B (en) | 1987-08-19 |
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ID=4792709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85102720 Expired CN85102720B (en) | 1985-04-16 | 1985-04-16 | Overlap prefabrication large prestressed reinforced concrete archroof slab in situ |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85102720B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103009477B (en) * | 2012-12-29 | 2016-01-20 | 中建六局土木工程有限公司 | A kind of factory for prefabrication prefabricated components construction method |
| CN105220808B (en) * | 2015-09-11 | 2018-01-16 | 杭州江润科技有限公司 | Large-span prestressed arch bar in-situ precast construction method of installation |
| CN107877664B (en) * | 2017-11-21 | 2024-05-28 | 重庆恒昇大业建筑科技集团有限公司 | Side form structure for building component lamination preparation |
| CN108032426B (en) * | 2017-11-21 | 2020-09-04 | 重庆大业新型建材集团有限公司 | Laminated preparation method of trough plate |
| CN108000680A (en) * | 2017-11-21 | 2018-05-08 | 重庆大业新型建材集团有限公司 | The laminated type preparation method of cored slab |
-
1985
- 1985-04-16 CN CN 85102720 patent/CN85102720B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85102720A (en) | 1986-11-12 |
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