CN101575894B - Prefabricated concrete beam - Google Patents
Prefabricated concrete beam Download PDFInfo
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- CN101575894B CN101575894B CN2008100670794A CN200810067079A CN101575894B CN 101575894 B CN101575894 B CN 101575894B CN 2008100670794 A CN2008100670794 A CN 2008100670794A CN 200810067079 A CN200810067079 A CN 200810067079A CN 101575894 B CN101575894 B CN 101575894B
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Abstract
The invention relates to a prefabricated concrete beam which comprises a beam main body consisting of a reinforcing steel bar and concrete wrapping the reinforcing steel bar, wherein the top surface of the beam main body is provided with a plurality of stirrups with bottom ends embedded in the concrete and top ends exposed out of the top surface and a plurality of main ribs which are fixedly connected with the stirrups; the main ribs are arranged along the length direction of the beam main body, and a gap is reserved between the bottom of the main rib at a lowest position and the top surface of the beam main body. The gap is reserved between the main rib exposed out of the top surface of the beam main body and the top surface of the beam main body, and the concrete is filled in the gap during pouring on the spot so as to ensure that the prefabricated concrete beam and an on-site pouring part can be tightly combined to guarantee the safety and the stability of a building.
Description
Technical field
The present invention relates to building field, more particularly, relate to a kind of precast concrete beam.
Background technology
Along with the develop rapidly of Chinese Urbanization's, urban population density is increasing, and people are urgent day by day to the demand of dwelling house, and high stratification, maximization and the complexity of building improve constantly.And traditional building is all accomplished through site operation (for example cast-in-place concrete frame, flooring etc.), not only has the construction quality risk that causes because of constructor's technical level, and has the lower problem of efficiency of construction.
The industrialization of construction industry production technology is meant and processes each branch's member of building (for example post, beam, flooring etc.) in factory's centralized production, carries out scene allocation and transportation assembling construction.Adopt the construction industry equalization, not only improved the efficient of building, and can at utmost improve structure precision, solve common quality defects such as wall crazing, seepage, improve building performance, reduce and use energy consumption and build energy consumption, the protection environment.
Yet, when precast concrete beam and other part of building are assembled, occur prefabricated units easily and cast-in-place part can not be combined closely, thereby cause the dislocation of precast concrete beam and in-situ layer, influence the stability and the safety of building.
Summary of the invention
The technical problem that the present invention will solve is, when being assembled into building and the defective closely of cast-in-place part joint portion, a kind of precast concrete beam is provided to above-mentioned precast concrete beam.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of precast concrete beam; Comprise the beam main body of forming by the reinforcing bar and the concrete of the said reinforcing bar of parcel; The end face of said beam main body has many foundation end and is embedded in stirrup and many main muscle affixed with said many stirrups that end face is exposed on concrete and top; Said main muscle has the gap between the bottom of the length direction setting of beam main body and upper/lower positions master muscle and beam main body end face; The end face of said beam main body has the frame shoulder with beam main body one; Said shoulder extended upward by the side of said beam main body and forms; The inside wall of said shoulder is perpendicular to the end face of beam main body, and said stirrup comprises perpendicular to the end face of beam main body and bottom and be embedded in support portion or brace rod in the concrete of beam main body that the inside wall of said shoulder is close in the brace rod of the said stirrup of part or support portion at least.
In precast concrete beam of the present invention; Be positioned at the length direction of plane, same plane and stirrup place perpendicular to the beam main body along each said stirrup on the same cross section of beam principal length direction; Said many main muscle are positioned at same plane and this main muscle belongs to plane parallel in beam main body end face, and the distance of the bottom of said main muscle and beam main body end face is 30-300mm.
In precast concrete beam of the present invention; Each said stirrup comprises the dowel that connects said brace rod; Said brace rod top is the crotch that Open Side Down; Outermost main muscle is fixed in the crotch in the said main muscle, and said dowel is erected on the said main muscle and the end bends downwards at outermost main reinforce position, and the distance of the low side of the crotch at said brace rod top and beam main body end face is more than or equal to 30mm.
In precast concrete beam of the present invention; Be positioned at the length direction of plane, same plane and stirrup place perpendicular to the beam main body along each said stirrup on the same cross section of beam principal length direction; Said many main muscle lay respectively at least two parallel planes; And these at least two planes are parallel to beam main body end face respectively, and the bottom and the distance of beam main body end face that wherein are positioned at the main muscle of k level are 30-300mm.
In precast concrete beam of the present invention; Each said stirrup comprises highly identical inboard muscle and outside muscle; And said inboard muscle comprises the connecting portion that two root portion are embedded in the support portion of said beam main body and are connected the top of two support portions respectively with outside muscle; Said connecting portion is parallel to said beam main body end face, saidly is positioned at the bottom that the most main muscle on high plane is secured to connecting portion.
In precast concrete beam of the present invention, the said main muscle that is positioned at k level is secured to the support portion of inboard muscle.
In precast concrete beam of the present invention, the top of said stirrup is apart from the distance of the end face of the beam main body distance greater than the end face of said shoulder distance from top beam main body.
In precast concrete beam of the present invention, the distance on the bottom of the main muscle that said main muscle middle distance beam main body end face is nearest and the surface of beam main body end face is 50mm.
In precast concrete beam of the present invention, said main muscle is Φ 18-Φ 32 reinforcing bars, and said stirrup is a Φ 9-12 reinforcing bar.
Precast concrete beam of the present invention; Through making retention gap between the main muscle that exposes beam main body end face and the beam main body end face; Concrete is filled into above-mentioned gap when building at the scene; Thereby this precast concrete beam and cast in situs are partly combined closely, guarantee the safety and the stability of building.
Description of drawings
To combine accompanying drawing and embodiment that the present invention is described further below, in the accompanying drawing:
Fig. 1 is the vertical cross section structure sketch map of precast concrete beam first embodiment of the present invention;
Fig. 2 is the vertical cross section structure sketch map of precast concrete beam second embodiment of the present invention;
Fig. 3 is the vertical cross section structure sketch map of precast concrete beam the 3rd embodiment of the present invention.
The specific embodiment
The present invention provides a kind of precast concrete beam; This precast concrete beam comprises the beam main body of being made up of the reinforcing bar and the concrete of the above-mentioned reinforcing bar of parcel; The end face of beam main body has many foundation end and is embedded in stirrup and many main muscle affixed with above-mentioned many stirrups that end face is exposed on concrete and top, and main muscle has the gap between the bottom of the length direction setting of beam main body and upper/lower positions master muscle and beam main body end face.When assembling, the concreting of cast in situs combines closely this beam main body and cast-in-place part between beam main body end face and the main muscle bottom and comprise above-mentioned main muscle and stirrup, has guaranteed the stability and the safety of building.
As shown in Figure 1, be the structural representation in cross section of the vertical length direction of precast concrete beam first embodiment of the present invention, this precast concrete beam can be used as the girder of building.Precast concrete beam in the present embodiment comprises the beam main body of being made up of the reinforcing bar and the concrete 11 of this reinforcing bar of parcel 10.Have two framves shoulders 14 with beam main body 10 one at the end face of beam main body 10, set up floor when being used for constructing at the scene above that.This two framves shoulder 14 is extended upward by two sidewalls of beam main body 10 respectively and forms, and the inside wall of frame shoulder 14 is perpendicular to the end face (being upper surface) of beam main body 10.
Between two frame shoulders 14, be provided with a plurality of stirrups 14, wherein each stirrup 14 is positioned at a plane, and this plane, stirrup 14 place is perpendicular to the length direction of beam main body 10.Each stirrup 14 comprises inboard muscle and outside muscle, and each inboard muscle and outside muscle comprise two support portions and a connecting portion respectively, in the concrete 11 that wherein support portion is embedded in beam main body 10 perpendicular to the end face and the bottom of beam main body 10; Connecting portion is parallel to the end face of beam main body 10 and connects the top of support portion.When realizing, the connecting portion of stirrup 14 and support portion can be formed by same bar bending, and the inside wall of frame shoulder 15 is close in the support portion of outside muscle.
In the present embodiment, 6 main muscle 13 are along the length direction setting of beam main body 10, and lay respectively at two planes that are parallel to beam main body 10 end faces.The top that wherein is positioned at 4 main muscle 13 of higher level (being first floor) is fixed in the connecting portion of stirrup 14 respectively; 2 are positioned at the support portion that is fixed in inboard muscle than the main muscle 13 of low degree (being the second layer).Because the main muscle 13 of the second layer is fixed in the support portion of inboard muscle, the concrete when having made things convenient for colligation construction and site operation is filled.Certainly, in practical application, the quantity of main muscle 13 also can increase or reduce, and the position also can be adjusted as required.Colligation was to stirrup 14 when in addition, main muscle 13 also can be constructed at the scene.
In above-mentioned precast concrete beam; Between than the bottom of the main muscle 13 of low degree and beam main body 10 end faces, leave the space; When building at the scene in this space fill concrete; Thereby guarantee combining closely of prefabricated beam main body 10 and in-situ layer, avoid the dislocation of pre-erection and cast-in-place part.Common above-mentioned gap is 30-300mm, and promptly being positioned at is 30-300mm than distance from bottom beam main body 10 end faces of the main muscle 13 of low degree apart from d1.Through evidence, above-mentioned optimum value apart from d1 is about 50mm.。
As shown in Figure 2, be that the precast concrete beam among this embodiment can be used as the secondary beam of building at the sketch map in the cross section of precast concrete beam second embodiment of the present invention.In the present embodiment; Comprise the beam main body of being made up of the concrete 21 of reinforcing bar and parcel reinforcing bar 20 equally, the end face of beam main body 20 comprises that extending upward two shoulders 25, many foundation ends forming by the side is embedded in the stirrup 24 of concrete 21 and the main muscle 23 of many connection stirrups 24.
In the present embodiment, each said stirrup 24 is positioned at same plane and plane, the stirrup 24 place length direction perpendicular to beam main body 20.Each said stirrup comprises that the bottom is embedded in brace rod and the dowel that is connected brace rod that beam main body, top have the crotch that Open Side Down; Wherein brace rod is perpendicular to said beam main body end face and be close to the inside wall of frame shoulder 25, and dowel is parallel to the end face of beam main body 20.Outermost 2 main muscle are fixed in the crotch of brace rod in 4 main muscle 23, and dowel is erected on the main muscle and the end bends downwards at outermost main reinforce position, the low side of the crotch at brace rod top and beam main body end face be 30-300mm apart from d2.Through evidence, above-mentioned optimum value apart from d2 is about 50mm.Certainly, in practical application, the quantity of main muscle 23 also can increase or reduce, and the position also can be adjusted as required.And colligation was to brace rod when main muscle 23 and dowel also can be constructed at the scene.
In the above embodiments, the distance of distance from top beam main body end face is takeed on the top of stirrup greater than frame apart from the distance of beam main body end face.
As shown in Figure 3, be the sketch map in the cross section of precast concrete beam the 3rd embodiment of the present invention.Different with first, second embodiment is that the end face of beam main body 30 only comprises the main muscle 33 that the bottom is buried mixed peaceful native 31 stirrup 34 underground and connected stirrup 34, and does not have the frame shoulder.Wherein the structure of stirrup 34, main muscle 33 and first, second embodiment are similar.
In the precast concrete beam of the foregoing description, main muscle is Φ 18-Φ 32 reinforcing bars, and stirrup is a Φ 9-12 reinforcing bar, can select in the above-mentioned scope that do not coexist according to the application site of beam, building type.
The above; Be merely the preferable specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (9)
1. precast concrete beam; Comprise the beam main body of forming by the reinforcing bar and the concrete of the said reinforcing bar of parcel; It is characterized in that; The end face of said beam main body has many foundation end and is embedded in stirrup and many main muscle affixed with said many stirrups that end face is exposed on concrete and top, and said main muscle has the gap between the bottom of the length direction setting of beam main body and upper/lower positions master muscle and beam main body end face, and the end face of said beam main body has the frame shoulder with beam main body one; Said shoulder extended upward by the side of said beam main body and forms; The inside wall of said shoulder is perpendicular to the end face of beam main body, and said stirrup comprises perpendicular to the end face of beam main body and bottom and be embedded in support portion or brace rod in the concrete of beam main body that the inside wall of said shoulder is close in the brace rod of the said stirrup of part or support portion at least.
2. precast concrete beam according to claim 1; It is characterized in that; Be positioned at the length direction of plane, same plane and stirrup place perpendicular to the beam main body along each said stirrup on the same cross section of beam principal length direction; Said many main muscle are positioned at same plane and this main muscle belongs to plane parallel in beam main body end face, and the distance of the bottom of said main muscle and beam main body end face is 30-300mm.
3. precast concrete beam according to claim 2; It is characterized in that; Each said stirrup comprises the dowel that connects said brace rod, and said brace rod top is the crotch that Open Side Down, and outermost main muscle is fixed in the crotch in the said main muscle; Said dowel is erected on the said main muscle and the end bends downwards at outermost main reinforce position, and the distance of the low side of the crotch at said brace rod top and beam main body end face is more than or equal to 30mm.
4. precast concrete beam according to claim 1; It is characterized in that; Be positioned at the length direction of plane, same plane and stirrup place perpendicular to the beam main body along each said stirrup on the same cross section of beam principal length direction; Said many main muscle lay respectively at least two parallel planes, and these at least two planes are parallel to beam main body end face respectively, and the bottom and the distance of beam main body end face that wherein are positioned at the main muscle of k level are 30-300mm.
5. precast concrete beam according to claim 4; It is characterized in that; Each said stirrup comprises highly identical inboard muscle and outside muscle; And said inboard muscle comprises the connecting portion that two root portion are embedded in the support portion of said beam main body and are connected the top of two support portions respectively with outside muscle, and said connecting portion is parallel to said beam main body end face, saidly is positioned at the bottom that the most main muscle on high plane is secured to connecting portion.
6. precast concrete beam according to claim 5 is characterized in that, the said main muscle that is positioned at k level is secured to the support portion of inboard muscle.
7. precast concrete beam according to claim 6 is characterized in that, the top of said stirrup is apart from the distance of the end face of the beam main body distance greater than the end face of said shoulder distance from top beam main body.
8. precast concrete beam according to claim 1 is characterized in that, the distance on the bottom of the main muscle that said main muscle middle distance beam main body end face is nearest and the surface of beam main body end face is 50mm.
9. precast concrete beam according to claim 1 is characterized in that, said main muscle is Φ 18-Φ 32 reinforcing bars, and said stirrup is a Φ 9-12 reinforcing bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100670794A CN101575894B (en) | 2008-05-05 | 2008-05-05 | Prefabricated concrete beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100670794A CN101575894B (en) | 2008-05-05 | 2008-05-05 | Prefabricated concrete beam |
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| Publication Number | Publication Date |
|---|---|
| CN101575894A CN101575894A (en) | 2009-11-11 |
| CN101575894B true CN101575894B (en) | 2012-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100670794A Active CN101575894B (en) | 2008-05-05 | 2008-05-05 | Prefabricated concrete beam |
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| CN107419848B (en) * | 2017-05-14 | 2019-05-17 | 北京工业大学 | A kind of metal chain-steel fiber reinforced concrete beams component |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2312278Y (en) * | 1997-05-27 | 1999-03-31 | 屈文俊 | Concrete building elements with long service life |
| CN2633992Y (en) * | 2003-09-09 | 2004-08-18 | 吴方伯 | Steel bar concrete prefabricated member for compound girder |
| CN2679263Y (en) * | 2004-02-11 | 2005-02-16 | 润弘精密工程事业股份有限公司 | Joint of semi-precast beam |
| CN201202217Y (en) * | 2008-05-05 | 2009-03-04 | 万科企业股份有限公司 | Precast concrete beam |
-
2008
- 2008-05-05 CN CN2008100670794A patent/CN101575894B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2312278Y (en) * | 1997-05-27 | 1999-03-31 | 屈文俊 | Concrete building elements with long service life |
| CN2633992Y (en) * | 2003-09-09 | 2004-08-18 | 吴方伯 | Steel bar concrete prefabricated member for compound girder |
| CN2679263Y (en) * | 2004-02-11 | 2005-02-16 | 润弘精密工程事业股份有限公司 | Joint of semi-precast beam |
| CN201202217Y (en) * | 2008-05-05 | 2009-03-04 | 万科企业股份有限公司 | Precast concrete beam |
Non-Patent Citations (4)
| Title |
|---|
| JP平8-93135A 1996.04.09 |
| JP平9-177240A 1997.07.08 |
| 周莉.钢筋混凝土结构设计原理导学教程.《钢筋混凝土结构设计原理导学教程》.知识产权出版社,2006,图5-5. * |
| 沈蒲生.混凝土结构设计原理.《钢筋混凝土结构设计原理》.高等教育出版社,2005,(第2版),第136页倒数第10行-137页第7行,图5-33,5-34. * |
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