CN102071740A - Long-span prestressed concrete slab small pre-frame structure and construction method thereof - Google Patents
Long-span prestressed concrete slab small pre-frame structure and construction method thereof Download PDFInfo
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- CN102071740A CN102071740A CN2009101462577A CN200910146257A CN102071740A CN 102071740 A CN102071740 A CN 102071740A CN 2009101462577 A CN2009101462577 A CN 2009101462577A CN 200910146257 A CN200910146257 A CN 200910146257A CN 102071740 A CN102071740 A CN 102071740A
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Abstract
The invention belongs to the technical field of building engineering structures, and in particular relates to a long-span prestressed concrete slab small pre-frame structure and a construction method thereof. After a frame column and a frame longitudinal beam are arranged, transverse constructional erection reinforcements are arranged above prestressed double-T slabs, single-T slabs, hollow slabs or SP slabs which are arranged on the two sides close to the frame column; a lateral template and a bottom template are suspended along the lateral direction of a T-shaped slab rib and the hollow slabs on the slab surface or the erection reinforcements; the position of the bottom template can be on the same contour line as the bottoms of the T-shaped slab rib and the hollow slabs or on the same contour line as the part in the middle of the T-shaped slab rib which is 250 to 450MM away from the top of the slab or the bottom of the slab rib and the part in the middle of the side face of each hollow slab which is 200 to 350MM away from the top of the slab or the bottom of the slab; reinforcements of a cross beam are arranged in a space formed by the template, are connected with the frame column reinforcements and then are connected by reinforcement stirrups; and finally concrete is cast and compacted according to regulations to form a small frame cross beam, namely a small pre-frame beam. In the invention, the section of the pre-frame beam is reduced; and flanges of the T-shaped slab can be cut off or reserved, so the cost is reduced, and construction and prefabrication benefits are improved.
Description
Technical field
The invention belongs to the building engineering structure technical field, be specifically related to a kind of large span prestressed concrete plate small draft frame structure and job practices.
Background technology
Large span prestressed concrete plate [wherein (hereinafter to be referred as the T template) and hollowcore slabs (hereinafter to be referred as the SP plate) such as double T plate, groove type plate and single T plate] is external to be used early.Particularly double T plate and SP plate are most widely used.Prefabricated and prestressed concrete handbook prefabricated as the U.S. and that prestressed concrete association (PCI) published as far back as 1992 has just comprised the content of this respect, China it is introduced, digestion, absorb and basis in conjunction with the China's national situation research experiment on, successively worked out out some provincial standard figure and national standard figure in 1999.
Prestressing force double T plate and SP plate belong to high-strength concrete thin-wall member (referring to the former especially), and its maximum advantage is: span big (the double T plate can reach 30m, the SP plate can reach 18m, and China's precast plate is in 8m), can build huge pillar apart from longspan structure; Rise low (0.45～1.085m is about roof truss structure height＜roof truss height and adds the roofing plate hight〉1/4～1/3) can significantly reduce depth of building, reaches the effect of saving metal material and energy; Good stability does not need additional lateral support (double T plate such as ground, stool four corners, and roof truss two end supports, its stability must be leaned on the support system of both sides); (the wide 2.4m meter of double T plate pressing board, its veneer area coverage reaches 21.6m to the member wide coverage from 9m to 30m
2～72m
2), after installing, installation effectiveness height, plate then finished the Structural Engineering amount of whole building roof system, and according to the engineering measuring and calculating, adopt 24m double T plank house lid can reduce 3/4 than the set-up time of traditional prestressed concrete roof truss, large roof slab.Big double T plate manufacturing firm has the professional contingent that transportation is installed concurrently at present, has formed one package service, has more improved installation effectiveness).Just therefore, double T plate, SP plate be in case occur just having obtained the extensive concern and the welcome of engineering circle, and become one of building roof structure form that replaces the tool advantage of traditional roof system gradually.
In addition, double T plate and SP plate remove big from the anharmonic ratio steel work, and outside the span that is difficult to reach bigger, its durability, fire resistance and high class of loading but are that steel work hardly matches.
But it must be noted that, the present double T plate and the SP plate overwhelming majority are used for the floor plate structural element of roof panel and non-frame construction, and be obstructed for the application of the DESIGN TREND OF MODERN INDUSTRIAL ARCHITECTURE that has a large capacity and a wide range, public building, commercial building middle frame structure, thereby the large-scale popularization that has limited this large span sheet material is to a great extent used.It is used the reason of being obstructed and mainly contained two: one in frame construction, do not find the structural calculation model and the corresponding design structure method that are complementary with it as yet.It is investigated and prefabricated leading to scheme all contents of not mentioned this respect, and also do not have this related content at " Code for design of concrete structures " and " seismic design provision in building code " of China with the local mark of prestressed concrete handbook and China in the U.S..But pertinent literature has a clause regulation: do not allow to adopt the hinged frame structure in the earthquake protection area.The 2nd, design the frame construction crossbeam (this be unique can satisfy engineering drawing examine necessary a kind of selection) of this large span member by the design code of code requirement as principle by the conventional frame structure, its consequence not only cruciform bracing cross section is big, heavy, not only attractive in appearance, the usage space of influence building, recruitment materials increase considerably, and difficulty of construction is big.Because this crossbeam must site operation, this just is difficult to reasonable coupling with the sequence of construction of double T plate, SP plate, thereby spins out the construction period.This has just fundamentally offset this large span member characteristics of high efficiency has been installed.Existing several engineering example has obtained proof.Adopting this method to be designed to frame construction person as this does not almost have, and is a kind of theoretic hypothesis.
The inventor has applied for " frame structure of wide span prestressed concrete plate special technology " patent (patent No.: 200710192847.4) in 2007, fundamentally solve large span prestressed concrete double T plate, single T beam slab, hollowcore slab and the use problem of SP plate in frame construction, but had following drawback:
Though more attractive in appearance, light, economical than traditional Vierendeel girder, still have certain cost, be embodied in two aspects:
1, cut away the edge of a wing: the cost of loss is about 15～60 yuan/square metre, with the corresponding increase of increase material cost of span.
Following row data instance: 2.4 meters wide plates, length is 21 meters, distance is generally 6 meters between the post, each 0.5 meter apart from 2 plate edges of a wing of inscribe on per 6 meters posts.Generally at every square metre more than 200 yuan, the plane cost that the edge of a wing area that cuts away is increased in 6 pages of 21 meters plates is for 21 meters load-bearing floor prices:
(0.5m * 21m * 200 yuan/m
2) * 2 page/(6m * 21m)=33 yuan/m
2
2, the cost of beam: amounting in the construction cost every square metre is 40.5 yuan: it is wide that the folded post of two blocks of double T plates on the edge of a wing is cut away in the pillar both sides, just intend the breadth of section of Vierendeel girder, general by 0.6 meter calculating, 21 meters bearing plate cross section height are 1.05 meters, even the centre adds the eps plate, the concrete thickness of each face of beam must not be lower than 0.2 centimetre, and beam does not still include the cost of reinforcing bar, and the concrete cost on the beam is 450 yuan/m
2Calculate:
The beam cost:
(1.05m * 0.6m * 21m * 450 yuan/m
2)/(6m * 21m)-[(1.05m-0.2m * 2) * (0.6m-0.2m * 2) * 21m * 450 yuan/m
2]/(6m * 21m)=37.5 yuan/m
2
As seen, every square metre increases cost is more than 70.5 yuan, and span increases cost and increases, and the edge of a wing is cut away in the part, though cost loss in the edge of a wing is little, and the corresponding again increase of beam section arrangement of reinforcement.The corresponding minimizing of roof panel cost.
Summary of the invention
The objective of the invention is to defective at above-mentioned prior art, a kind of large span prestressed concrete plate small draft frame structure and job practices are provided, to reduce to intend the cross section of Vierendeel girder, can cut away also and can not cut away the T template edge of a wing. reduce construction cost, improve construction and prefabricated benefit.
Technical scheme of the present invention is as follows: a kind of large span prestressed concrete plate small draft frame structure, comprise frame column and frame rails, and it is characterized in that:
(1) near the prestressed concrete double T plate below the frame column both sides or single T beam slab or three T plate
1. two plates in both sides are not cut the edge of a wing,
2. two plates in both sides are all cut the whole or local of the edge of a wing or one and are cut that all another cuts the part
3. a plate is not cut the edge of a wing, and another plate is cut all or local go up or hollowcore slab comprises horizontal handling reinforcement is set on the SP plate, on handling reinforcement or suspend side, soffit formwork onboard in midair; When selecting double T plate or single T beam slab for use, the rib of the position of soffit formwork and double T plate or single T beam slab bottom on same isohypse or be selected in rib of slab in the Board for adjusting vision distance top or at the bottom of the plate 250-450mm distance on same isohypse to reduce beam section, the desirable 200mm of its breadth of section, height can be between 250-450mm; When selecting hollowcore slab or SP plate for use, in the side bottom of the position of soffit formwork and hollowcore slab or SP plate or the side at the bottom of Board for adjusting vision distance top or the plate 200-350mm on same isohypse to reduce beam section; In the space that crossbeam side form and crossbeam bed die form, the reinforcing bar of crossbeam is set and is connected, connect with stirrup again, by disturbing concrete formation small frame crossbeam---little plan Vierendeel girder with reinforcing bar on the frame column; Little plan Vierendeel girder and prestressed concrete plate, frame column, longeron is formed small draft frame structure together. and perhaps (2): hole-opening on the position of 250-450mm at the bottom of the rib in the T template rib of frame column both sides, hole-opening on the position of hollowcore slab side, frame column both sides middle part 200-350mm at the bottom of the plate, on hole, set up the upright reinforcing bar of transverse strands, doing side template with T template rib under it does side template or hangs 2 side templates or hang a side template in hollowcore slab side down with it, do side template with one of them rib, hang soffit formwork again, in the space that crossbeam side form and crossbeam bed die form, the reinforcing bar of crossbeam is set and is connected with reinforcing bar on the frame column, connect with stirrup again, constitute small frame crossbeam---little plan Vierendeel girder by disturbing concrete.In order to be to intend Vierendeel girder in 200710192847.4 draft frame structures of declaring to distinguish with number of patent application in 2007, and being customized for " little plan Vierendeel girder " and " little plan cruciform bracing " by its character, it is formed draft frame structure with frame column, frame rails and is customized for " small draft frame structure ".
Aforesaid large span prestressed concrete plate small draft frame structure, wherein, described crossbeam reinforcing bar is a nonprestressed reinforcement, and is connected with the frame column reinforcing bar; The transverse structure handling reinforcement that is provided with on crossbeam inner panel top sets up the crossbeam reinforcing bar and is provided with the stirrup of reliable connection.
Aforesaid large span prestressed concrete plate small draft frame structure, wherein, described side, soffit formwork are steel form or wooden form or plastic formwork or concrete blinding.
A kind of job practices of large span prestressed concrete plate small draft frame structure comprises the steps:
(1) uses common process installing frame trestle, frame rails and double T plate or single T beam slab or hollowcore slab or SP plate;
(2) near the prestressing force double T plate of frame column both sides or the plate top of single T beam slab or hollowcore slab or SP plate horizontal handling reinforcement is being set;
(3) set up the crossbeam soffit formwork and the side template of suspention, when selecting double T plate or single T beam slab for use, the rib of the position of soffit formwork and double T plate or single T beam slab bottom on the same isohypse or be selected in rib of slab in the middle of a certain position on same isohypse to reduce beam section; When selecting hollowcore slab or SP plate for use, in the middle of the side bottom of the position of soffit formwork and hollowcore slab or SP plate or the side a certain position on same isohypse to reduce beam section;
(4) in the space that crossbeam side template and crossbeam soffit formwork form, the reinforcing bar of crossbeam is set and is connected with the frame column reinforcing bar;
(5) crossbeam reinforcing bar, bearing rod connect with stirrup;
(6) disturbing concrete constitutes small frame crossbeam---little plan Vierendeel girder in accordance with regulations; Little plan Vierendeel girder is formed small draft frame structure with large span prestressed concrete plate, frame column, longeron.
Beneficial effect of the present invention is as follows: large span prestressed concrete plate small draft frame structure provided by the present invention, the weight of little plan Vierendeel girder and upper load thereof under vertical uniform load q since prestressed concrete plate and non-prestressed plan Vierendeel girder under vertical uniform load q, be out of shape the more large and complete portion of difference and pass on the prestressed concrete plate of both sides, thereby both become the rod member of no load, can dispose by the minimal construction arrangement of reinforcement, become no moment of flexure rod member again, under horizontal force or seismic force effects, draw or the rod member of pressure for mainly bearing.The edge of a wing of when construction, can not need cut away the T template, the cross section of beam reduces to save cost, and construction is simple, efficient.
The description of drawings and the specific embodiment
Fig. 1 is a structural representation of not cutting little plan Vierendeel girder under the situation of the edge of a wing when adopting the T template; As shown in Figure 1, be example with the double T plate, treat that 1. frame column is installed with frame rails after, the double T plate is installed 3. in the frame column both sides, 2. suspention is provided with beam forms, horizontal handling reinforcement is set 4., 5. the longitudinal reinforcement that beam is set is connected with the pillar reinforcing bar, 6. connects with stirrup again.Disturbing concrete has promptly constituted little plan cruciform bracing in accordance with regulations.Little plan cruciform bracing is formed " small draft frame structure " with large-span prestressed plate, frame column, longeron etc.The crossbeam reinforcing bar is a nonprestressed reinforcement, and is connected with the frame column reinforcing bar; The transverse structure handling reinforcement that is provided with on crossbeam inner panel top 4. set up the crossbeam reinforcing bar 5. and the stirrup that is provided with reliable connection 6..
Obviously, those skilled in the art can carry out change on the various forms and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (6)
1. a large span prestressed concrete plate small draft frame structure comprises frame column and frame rails, it is characterized in that:
(1) near the prestressed concrete double T plate below the frame column both sides or single T beam slab or three T plate
1. two plates in frame column both sides are not cut the edge of a wing,
2. two plates in frame column both sides are all cut the whole or local of the edge of a wing or one and are cut that all another cuts the part
3. a plate is not cut the edge of a wing, and another plate is cut whole or local
Go up or hollowcore slab comprises horizontal handling reinforcement is set on the SP plate, on handling reinforcement or suspend side, soffit formwork onboard in midair; When selecting double T plate or single T beam slab for use, the rib of the position of soffit formwork and double T plate or single T beam slab bottom on same isohypse or be selected in rib of slab in the Board for adjusting vision distance top or at the bottom of the plate 250-450mm distance on same isohypse to reduce beam section, the desirable 200mm of its breadth of section, height can be between 250-450mm; When selecting hollowcore slab or SP plate for use, in the side bottom of the position of soffit formwork and hollowcore slab or SP plate or the side at the bottom of Board for adjusting vision distance top or the plate 200-350mm on same isohypse to reduce beam section; In the space that crossbeam side form and crossbeam bed die form, the reinforcing bar of crossbeam is set and is connected, connect with stirrup again, by disturbing concrete formation small frame crossbeam---little plan Vierendeel girder with reinforcing bar on the frame column; Little plan Vierendeel girder and prestressed concrete plate, frame column, longeron is formed small draft frame structure together. and (2): perhaps hole-opening on the position of 250-450mm at the bottom of the rib in the T template rib of frame column both sides, hole-opening on the position of hollowcore slab side, frame column both sides middle part 200-350mm at the bottom of the plate, on hole, set up the upright reinforcing bar of transverse strands, doing side template with T template rib under it does side template or hangs 2 side templates or hang a side template in hollowcore slab side down with it, do side template with one of them rib, hang soffit formwork again, in the space that crossbeam side form and crossbeam bed die form, the reinforcing bar of crossbeam is set and is connected with reinforcing bar on the frame column, connect with stirrup again, constitute small frame crossbeam---little plan Vierendeel girder by disturbing concrete.
2. large span prestressed concrete plate small draft frame structure as claimed in claim 1 is characterized in that:
Described crossbeam reinforcing bar is a nonprestressed reinforcement, and is connected with the frame column reinforcing bar; On crossbeam inner panel top hole-opening on the position of 250-450mm at the bottom of the rib is set in transverse structure handling reinforcement or the T template rib, hole-opening on the position of hollowcore slab side, frame column both sides middle part 200-350mm at the bottom of the plate, on hole, set up the upright reinforcing bar of transverse strands, set up the crossbeam reinforcing bar, and link with reliable stirrup.
3. should extend to the ribbed back portion of two double T plates as horizontal handling reinforcement as described in 1;
4. large span prestressed concrete plate small draft frame structure as claimed in claim 1 or 2 is characterized in that: side, soffit formwork are steel form or wooden form or plastic formwork or concrete blinding.
5. according to claim 1, little plan cruciform bracing, because it differs greatly for non-prestressed beam and both sides Prestressed T template modification, answer in advance on the concrete slab and vertical load on it is all passed to both sides, thereby it is 0 load rod member, can be by minimum arrangement of reinforcement configuration, both economical attractive in appearance, be again the rod member of a no moment of flexure, under seismic forces and horizontal force action, become and bear the main rod member that draws with pressure.
6. the job practices of a large span prestressed concrete plate small draft frame structure comprises the steps:
(1) uses common process installing frame trestle, frame rails and double T plate or single T beam slab or hollowcore slab or SP plate; Make both sides T template as close as possible as then cutting T template angle near the frame column position at it with double T plate, single T beam slab, with the cross section that reduces to intend Vierendeel girder as far as possible also can cut away simultaneously 2 pages of plate edges of a wing all or one one or one page plate cut away one one or all, another page plate is not cut the edge of a wing;
(2) on plate top horizontal handling reinforcement is set or the position hole-opening between the 250-400mm at the bottom of the rib in the T template rib of frame column both sides near the prestressing force double T plate of frame column both sides or single T beam slab or hollowcore slab or SP plate, the upright reinforcing bar of transverse strands is set up in 200-350mm position hole-opening at the bottom of the plate in the hollowcore slab side on hole;
(3) set up crossbeam soffit formwork and 2 side templates of suspention, when selecting the T template for use, or do side template or hang a side template and do side template with one of them rib with both sides of the chest, when selecting hollowcore slab for use, side template is done in available two sides, an also available side is done side template and is hung another side template. when selecting double T plate or single T beam slab for use, the rib of the position of soffit formwork and double T plate or single T beam slab bottom on same isohypse or be selected in rib of slab at the bottom of the spacing rib or 250-450mm position, plate top on same isohypse to reduce beam section, the desirable 200mm of its breadth of section, height can be between 250-450mm; When selecting hollowcore slab or SP plate for use, in the side bottom of the position of soffit formwork and hollowcore slab or SP plate or the side Board for adjusting vision distance top 200-350mm on same isohypse to reduce beam section;
(4) in the space that crossbeam side template and crossbeam soffit formwork form, the reinforcing bar of crossbeam is set and is connected with the frame column reinforcing bar;
(5) crossbeam reinforcing bar, bearing rod etc. connect with stirrup;
(6), can on the plate face, box out during as double T plate or slit, single T beam slab top less than 200mm, so as pouring concrete with and hang template and use.
(7) disturbing concrete constitutes small frame crossbeam---little plan Vierendeel girder in accordance with regulations; Little plan Vierendeel girder is formed small draft frame structure with large span prestressed concrete plate, frame column, longeron.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101462577A CN102071740A (en) | 2009-05-19 | 2009-06-19 | Long-span prestressed concrete slab small pre-frame structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910141662.X | 2009-05-19 | ||
| CN200910141662 | 2009-05-19 | ||
| CN2009101462577A CN102071740A (en) | 2009-05-19 | 2009-06-19 | Long-span prestressed concrete slab small pre-frame structure and construction method thereof |
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| CN102071740A true CN102071740A (en) | 2011-05-25 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102864839A (en) * | 2012-10-13 | 2013-01-09 | 柳忠林 | Virtual beam used in large-span prestressed concrete beam plate frame structure |
| CN103334492A (en) * | 2013-06-17 | 2013-10-02 | 南京长江都市建筑设计股份有限公司 | Prefabricated assembled type framework structure |
| CN103711201A (en) * | 2013-09-13 | 2014-04-09 | 柳忠林 | Large-span prestressed concrete beam board frame structural system |
| CN104234193A (en) * | 2014-07-15 | 2014-12-24 | 柳忠林 | Large-span large-load pre-stress double-T plate and single-T plate frame structure system |
| US9518388B1 (en) * | 2015-09-24 | 2016-12-13 | Guangzhou Construction Engineering Co., Ltd. | Construction method for producing beam and slab made of compound concrete containing demolished concrete |
| CN110206158A (en) * | 2019-04-22 | 2019-09-06 | 中国航空规划设计研究总院有限公司 | A kind of horizontal connection structure and its construction method of precast concrete T plate |
-
2009
- 2009-06-19 CN CN2009101462577A patent/CN102071740A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102864839A (en) * | 2012-10-13 | 2013-01-09 | 柳忠林 | Virtual beam used in large-span prestressed concrete beam plate frame structure |
| CN103334492A (en) * | 2013-06-17 | 2013-10-02 | 南京长江都市建筑设计股份有限公司 | Prefabricated assembled type framework structure |
| CN103711201A (en) * | 2013-09-13 | 2014-04-09 | 柳忠林 | Large-span prestressed concrete beam board frame structural system |
| CN103711201B (en) * | 2013-09-13 | 2019-02-19 | 柳承志 | A kind of large-span prestressed concrete beam slab frame structure system |
| CN104234193A (en) * | 2014-07-15 | 2014-12-24 | 柳忠林 | Large-span large-load pre-stress double-T plate and single-T plate frame structure system |
| US9518388B1 (en) * | 2015-09-24 | 2016-12-13 | Guangzhou Construction Engineering Co., Ltd. | Construction method for producing beam and slab made of compound concrete containing demolished concrete |
| CN110206158A (en) * | 2019-04-22 | 2019-09-06 | 中国航空规划设计研究总院有限公司 | A kind of horizontal connection structure and its construction method of precast concrete T plate |
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Application publication date: 20110525 |