CN202831390U - Prestressed precast beam with shelved head - Google Patents
Prestressed precast beam with shelved head Download PDFInfo
- Publication number
- CN202831390U CN202831390U CN 201220405850 CN201220405850U CN202831390U CN 202831390 U CN202831390 U CN 202831390U CN 201220405850 CN201220405850 CN 201220405850 CN 201220405850 U CN201220405850 U CN 201220405850U CN 202831390 U CN202831390 U CN 202831390U
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- lead
- precast beam
- beam body
- taking
- embedded
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Abstract
Provided is a prestressed precast beam with a shelved head. The prestressed precast beam with a shelved head includes a beam body and a prestressed steel strand, wherein the prestressed steel strand is buried in the beam body as a main reinforcement. The beam body is provided with a stirrup and part of the stirrup stretches out of the upper surface of the beam body. The prestressed precast beam with a shelved head is characterized in that the beam end is provided with the shelved head, the lower end of the shelved head is provided with a trapezoid notch, and a plurality of the formwork holes are arranged vertically on the beam body. The prestressed precast beam with a shelved head has the advantages of being convenient in construction, low in cost, good in entirety. Meanwhile because of the large inclination of the notch of the beam end, a inclined stirrup is convenient to arrange after installing the beam, and therefore the shear performance of the beam end is improved.
Description
Technical field
The utility model relates to a kind of building prefabrication beam, relates in particular to the prefabricated secondary beam of prestressing force in a kind of integral precast structure.
Background technology
Usually establish prop in the integral precast structure construction and bear the construction stage dead load, but when higher or bottom soil property is relatively poor when floor height, stable or the settlement Control of prop is difficult, therefore under the construction stage beam, usually do not establish prop, dead load load and construction live load are born by precast beam, especially secondary beam shelve the head must satisfy requirement of strength.The patent of declaring before this adopts channel-section steel to shelve that its cost of head is high makes complicatedly, and beam-ends down gap place can't the arrangement of reinforcement stirrup, affects the shear behavior of beam-ends, and in addition, the channel-section steel width is little, poor stability during construction.Not establishing pillar under a kind of construction stage beam directly bears the prefabricated secondary beam of construction stage load and has no report.
The utility model content
Technical problem to be solved in the utility model is to overcome the deficiency of above-mentioned prior art, provides that a kind of making is simple, cost is low, and the prestressing force precast beam of good stability during construction.
A kind of band that provides according to the utility model is shelved the prestressing force precast beam of head, comprise that Liang Tihe is embedded in Liang Tizhong as the prestress wire of main muscle, the part that described beam body is provided with stirrup and described stirrup is stretched out the upper surface of described beam body, described beam-ends is provided with to shelve and takes the lead, be provided with trapeze cut below taking the lead, longitudinally be provided with a plurality of formwork through holes on the described beam body.
The prestressing force precast beam that a kind of band that provides according to the utility model is shelved head also has following attached technical characterictic:
Described taking the lead stretched out beam-ends face 100-200mm, and the width of taking the lead is less than beam body width 50-60mm, the height 100-200mm that takes the lead, and described breach is the trapezoidal shape hypotenuse and is 45 ° of left and right sides angles, notch depth 300-400mm.
Be furnished with the U-shaped reinforcing bar of some horizontal positioned and the stirrup of vertical placement in described the taking the lead, the U-shaped reinforcing bar stretches into certain-length in the beam body.
Described beam-ends is embedded with bent-up bar, and the upper surface certain-length of taking the lead is exposed in bent-up bar upper end, two bent-up bars shape that takes the shape of the letter U that is connected in the lower end.
Described prestress wire stretches out breach end face certain-length, and the steel strand end is bent into the right angle crotch.
Described beam body top also is embedded with the prestress wire that adopts the pre-tensioning system construction.
Described prestress wire has sleeve pipe at least part of steel strand cover of beam-ends, and described sleeve pipe is embedded in the end of described beam body.
The described interior anti-shear steel plate that vertically is embedded with of taking the lead.
The prestressing force precast beam that a kind of band that provides according to the utility model is shelved head compared with prior art has following advantage: at first, the utility model adopts steel bar concrete to shelve head, manufacturing, easy construction, cost is low, good integrity, shelve safe and reliablely, can save prop, greatly make things convenient for floor construction; Secondly, beam-ends breach gradient of the present utility model is large, can inclined stirrup be set after beam installs conveniently, improves the shear behavior of beam-ends.
Description of drawings
Fig. 1 is stereogram of the present utility model.
Fig. 2 is arrangement of reinforcement elevation of the present utility model.
Fig. 3 is beam-ends of the present utility model and the arrangement of reinforcement full-page proof of taking the lead.
Fig. 4 is section of the present utility model and arrangement of reinforcement.
Fig. 5 is the arrangement of reinforcement section of taking the lead of the present utility model.
The specific embodiment
Referring to Fig. 1 to Fig. 5, shelve among the embodiment of prestressing force precast beam of head at a kind of band that the utility model provides, comprise beam body 1 and be embedded in Liang Tizhong as the prestress wire 2 of main muscle, the part that described beam body 1 is provided with stirrup 11 and described stirrup 11 is stretched out the upper surface of described beam body, described beam-ends is provided with to shelve takes the lead 3,3 belows of taking the lead are provided with trapeze cut 12, longitudinally are provided with a plurality of formwork through holes 13 on the described beam body 1.Described shelve to take the lead 3 floor load and construction live load be delivered on the girder, and need not to establish in the end temporary supporting, convenient construction greatly, and trapeze cut 12 is established for making to stay in the beam after reserved joint bar on the girder can extend into whole watering improves the globality of girder and secondary beam connection.Formwork through hole 13 is used for arranging the hold item of floor slab formerecting, the load of floor can directly be passed on the precast beam and need not to set up and lands scaffold, can reduce cost by convenient construction.
Referring to Fig. 3, in above-described embodiment that the utility model provides, described taking the lead is furnished with the U-shaped reinforcing bar 31 of some horizontal positioned and the stirrup 32 of vertical placement in 3, U-shaped reinforcing bar 31 stretches into certain-length in the beam body, described U-shaped muscle 31 is the outer too short problem of horizontal bar anchorage length of solution beam, and must stretch into certain-length in the beam to satisfy the anchorage length requirement.
Referring to Fig. 2, Fig. 3, in above-described embodiment that the utility model provides, described beam-ends is embedded with bent-up bar 4, and the 3 upper surface certain-lengths of taking the lead are exposed in bent-up bar 4 upper ends, two bent-up bars 4 shape that takes the shape of the letter U that is connected in the lower end.Described bent-up bar 4 can be used as again the anti-shear reinforcing bar of superposed beam operational phase as the tensile reinforcement of 3 construction stages of taking the lead, and it is the lower end anchoring property that bends up muscle in order to improve that the lower end is linked to be U-shaped.
Referring to Fig. 1 to Fig. 3, in above-described embodiment that the utility model provides, described prestress wire stretches out breach 12 end face certain-lengths, steel strand 2 ends are bent into the right angle crotch, the steel strand 2 of right angle crotch can guarantee with girder on the reinforcing bar that stretches out enough lap length are arranged, improve the globality that primary-secondary beam connects.
Referring to Fig. 2, Fig. 3, in above-described embodiment that the utility model provides, described beam body top also is embedded with the prestress wire 5 that adopts the pre-tensioning system construction, and the antiarch that beam body upper steel twisted wire 5 plays balance bottom steel strand 2 when putting makes precast beam top the crack not occur.
Referring to Fig. 3, Fig. 4, in above-described embodiment that the utility model provides, described prestress wire 2 has sleeve pipe 21 at least part of steel strand cover of beam-ends, described sleeve pipe 21 is embedded in the end of described beam body, beam end portion steel strand 2 are buried the bonding that sleeve pipe can be eliminated concrete and steel strand underground, thereby discharge prestressing force, and this local compressive stress that not only can reduce beam-ends is concentrated, avoid the beam-ends bottom crack to occur, can also alleviate the compressive stress stack of superposed beam beam-ends bottom.
Referring to Fig. 3, Fig. 5, in above-described embodiment that the utility model provides, vertical facilities has steel plate 33 in described 3 concretes of taking the lead, the shear strength of described steel plate 33 for strengthening taking the lead.
Claims (8)
1. a band is shelved the prestressing force precast beam of head, comprise that Liang Tihe is embedded in Liang Tizhong as the prestress wire of main muscle, the part that described beam body is provided with stirrup and described stirrup is stretched out the upper surface of described beam body, it is characterized in that described beam-ends is provided with to shelve takes the lead, be provided with trapeze cut below taking the lead, longitudinally be provided with a plurality of formwork through holes on the described beam body.
2. precast beam as claimed in claim 1 is characterized in that described taking the lead stretch out beam-ends face 100-200mm, take the lead width less than beam body width 50-60mm, take the lead the height 100-200mm, described breach is the trapezoidal shape hypotenuse and is 45 ° of left and right sides angles, notch depth 300-400mm.
3. precast beam as claimed in claim 1 is characterized in that being furnished with in described the taking the lead the U-shaped reinforcing bar of some horizontal positioned and the stirrup of vertical placement, and the U-shaped reinforcing bar stretches into certain-length in the beam body.
4. precast beam as claimed in claim 1 is characterized in that described beam-ends is embedded with bent-up bar, and the upper surface certain-length of taking the lead is exposed in bent-up bar upper end, two bent-up bars shape that takes the shape of the letter U that is connected in the lower end.
5. precast beam as claimed in claim 1 is characterized in that described prestress wire stretches out breach end face certain-length, and the steel strand end is bent into the right angle crotch.
6. precast beam as claimed in claim 1 is characterized in that described beam body top also is embedded with the prestress wire that adopts the pre-tensioning system construction.
7. precast beam as claimed in claim 1 is characterized in that described prestress wire has sleeve pipe at least part of steel strand cover of beam-ends, and described sleeve pipe is embedded in the end of described beam body.
8. precast beam is characterized in that the described interior anti-shear steel plate that vertically is embedded with of taking the lead as claimed in claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220405850 CN202831390U (en) | 2012-08-16 | 2012-08-16 | Prestressed precast beam with shelved head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220405850 CN202831390U (en) | 2012-08-16 | 2012-08-16 | Prestressed precast beam with shelved head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202831390U true CN202831390U (en) | 2013-03-27 |
Family
ID=47943134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220405850 Expired - Lifetime CN202831390U (en) | 2012-08-16 | 2012-08-16 | Prestressed precast beam with shelved head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202831390U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852280A (en) * | 2012-08-16 | 2013-01-02 | 杨众 | Precast pre-stressed beam with shelving corbel outs |
-
2012
- 2012-08-16 CN CN 201220405850 patent/CN202831390U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852280A (en) * | 2012-08-16 | 2013-01-02 | 杨众 | Precast pre-stressed beam with shelving corbel outs |
| CN102852280B (en) * | 2012-08-16 | 2016-07-13 | 杨众 | The prestressing force precast beam of head shelved by a kind of band |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |