CN1328449C - Method for converting stretching ends with binding prestress to stretching ends without binding prestress - Google Patents
Method for converting stretching ends with binding prestress to stretching ends without binding prestress Download PDFInfo
- Publication number
- CN1328449C CN1328449C CNB2004100706270A CN200410070627A CN1328449C CN 1328449 C CN1328449 C CN 1328449C CN B2004100706270 A CNB2004100706270 A CN B2004100706270A CN 200410070627 A CN200410070627 A CN 200410070627A CN 1328449 C CN1328449 C CN 1328449C
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- Prior art keywords
- prestressing
- bellows
- pipe
- sealed tube
- construction
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Abstract
The present invention discloses a method for converting a stretching end with binding pre-stressing to a stretching end without binding prestressing, which is a new prestressing construction technology created by combining respective characteristics of the prestressing with bond and the prestressing without bond in structure stress and construction, namely setting a switching device near the tensioning end of the prestressing. The switching device is mainly composed of materials and components, such as a sealed tube (1), flexible material (2), a steel strand (3), an antirust lubrication bushing (4), a corrugated pipe (5), etc. The present invention has excellently practical application effects on construction which adopts binding prestressing structure with the reinforced bars densely distributed on the tensioning end and the anchorage not suitable for exposing, can effectively reduce difficulties of prestressing construction, accelerate construction progress to a great extent, and gain great economical and social benefits.
Description
Affiliated technical field
The invention belongs to the building structure technology field
Background technology
The stretch-draw end of bonded prestress structure is made up of prestress wire, group's anchor, oviduct and spiral bar according to common way.Because group's anchor, oviduct and spiral bar volume are bigger, are normally placed in reinforcing bar close quarterses such as bean column node in engineering is used again, through regular meeting the situation that the stretch-draw end can not be put any more ground tackle appears in the construction.This situation not only causes constructional difficulties but also usually ground tackle and oviduct is placed in the outside of structure under situation about not being able to, and causes the outer facade of building and finishing all to be affected.
Summary of the invention
At the problem of above-mentioned existence, the invention provides a kind of is the way of prestressing without bondn stretch-draw end with the transition of bonded prestress stretch-draw end.The present invention is made up of parts such as prestress wire, bellows, sealed tube, flexible material, sleeve pipe and ground tackles.By the mode of transition member is set in close position, stretch-draw end, allow the end of bonded prestress stretch-draw change and become prestressing without bondn stretch-draw end, thereby made things convenient for the dispersion of prestressing force pull end ground tackle and arranged, be convenient to prestress wire by the reinforcing bar close quarters, make that the installation of stretch-draw end is convenient and easy, and satisfy the requirement of external facade of building and finishing.The present invention solves a kind of effective ways that bonded prestress stretch-draw end anchor point is difficult for problems such as arranging.
The present invention realizes according to following scheme.At first, place the prestressing force bellows according to the construction technology of bonded prestress.The pipe end of bellows is arranged on the position near 1 meter～2 meters of prestressing force pull end.In this position, prestress wire stretches out in the mouth of pipe of bellows, and penetrates in the plastic polyethylene sleeve pipe that scribbles the anti-rust and lubrication grease by root.In position grout pipe is installed, in the position of the bellows mouth of pipe steel strand is implemented encapsulation process and fixing then, form the structural form of a cambic sealed tube near bellows mouth of pipe part.Filling flexible material in this sealed tube is used to seal the exposed position of steel strand and the anti-rust and lubrication grease that plastic bushing overflows.By the structural form of this kind sealed tube, realize the transition of bonded prestress to prestressing without bondn, allow bonded prestress stretch-draw end be converted into prestressing without bondn stretch-draw end.
The beneficial effect that bonded prestress stretch-draw end is made into prestressing without bondn stretch-draw end is: 1, brought into play the stressed advantage of bonded prestress structure and the advantage of being convenient to construct of prestressing without bondn; 2, this way is specially adapted to the Large Span Prestressed Beam plated construction, particularly large span bonded prestress beam with span centre control, in the bean column node place reinforcing bar engineering of very dense again; 3, greatly reduce prestressed difficulty of construction, simultaneously prestressed ground tackle also can dispersed placement, has made things convenient for arranging of prestressing force pull end ground tackle, and the installation of stretch-draw end is convenient and easy; 4, the requirement of external facade of building and finishing can be satisfied in position, stretch-draw end.
Description of drawings:
The present invention will be further described below in conjunction with accompanying drawing.Fig. 1 converts bonded prestress stretch-draw end to for the present invention the organigram of prestressing without bondn stretch-draw end way.Sequence number is respectively sealed tube 1, flexible material 2, steel strand 3, anti-rust and lubrication sleeve pipe 4, bellows 5, grouting duct 6, plastic cover plate 7 among the figure.Position shown in the left side is a bonded prestress bellows 5 among the figure; The middle position that links to each other with bellows is the structural form of sealed tube 1, i.e. the intermediate location of bonded prestress and prestressing without bondn.
The specific embodiment
With reference to accompanying drawing, the present invention mainly is made up of materials such as sealed tube 1, flexible material 2, steel strand 3, anti-rust and lubrication sleeve pipe 4, bellows 5 and parts.The coaxial mode that bellows 5 pipe ends are formed steel wire bundle according to steel strand 3 is arranged on the position near 1 meter～2 meters of prestressing force pull end.Prestress wire 3 stretches out in the mouth of pipe of bellows 5, and penetrates in the sleeve pipe 4 that scribbles the anti-rust and lubrication grease by root.Near the position of the body mouth of pipe part grout pipe 6 and plastic cover plate 7 are installed at bellows 5, in the position of bellows 5 mouths of pipe sealed tube 1 are set then.The exposed section of prestress wire 3 and the binding site of being wrapped up in by sleeve pipe 4 covers place in the sealed tube 1.Filling flexible material 2 is a cavernous body in sealed tube 1, and the anti-rust and lubrication grease that the exposed position and the sleeve pipe 4 of steel strand 3 overflowed seals and sealed tube 1 is fixed.By this kind structural form, allow bonded prestress stretch-draw end be converted into prestressing without bondn stretch-draw end.Filling flexible material 2 is to prevent that concrete mortar from entering in the bellows in sealed tube 1, also is to prevent that the grease in the plastic pipe from penetrating in the bellows.Steel strand 3 form the binding site that does not have bonding and bonded prestress in sealed tube 1.The wall thickness of anti-rust and lubrication sleeve pipe 4 and oil quality etc. should satisfy the technical requirement of prestressing without bondn plastic bushing.Bellows 5 can adopt metal bellows also can adopt plastic film capicitor etc.Metal tube is adopted in grouting duct 6 usually, can carry out pressure grouting, also can doublely make stack.The accessory of plastic cover plate 7 when normally the bonded prestress bellows is provided with stack is used to prevent that concrete mortar from entering in the bellows.
Characteristics of the present invention are: the stretching end of bonded prestress is converted into prestressing without bondn stretch-draw End; Make the way of prestressing without bondn at the stretching end place, can the prestressed ground tackle of dispersed placement, no Can take bigger ground tackle space, also be conducive to the construction of building decoration simultaneously. There is bonding pre-for employing Stress structure, reinforcing bar is very intensive at the stretching end place, has very real on the engineering that ground tackle should not expose again With result of use. This kind way can reduce prestressed difficulty of construction to a great extent effectively, adds Fast construction speed. The present invention has good economic benefit and social benefit.
Claims (1)
1. way that bonded prestress stretch-draw end is converted to prestressing without bondn stretch-draw end, employed parts of this way and material mainly comprise sealed tube (1), flexible material (2), steel strand (3), anti-rust and lubrication sleeve pipe (4) and bellows (5), it is characterized in that bellows (5) pipe end is arranged on the position at close 1 meter～2 meters of prestressing force pull end according to the coaxial mode with steel strand (3) composition steel wire bundle; Prestress wire (3) penetrates bellows (5), passes in the mouth of pipe of described bellows (5) pipe end then, and penetrates in the sleeve pipe (4) that scribbles the anti-rust and lubrication grease by root; Near the position of the body mouth of pipe part grout pipe (6) and plastic cover plate (7) are installed at bellows (5), at bellows (5) mouth of pipe sealed tube (1) are set then; The exposed section of prestress wire (3) and the binding site of being wrapped up in by sleeve pipe (4) cover place in the sealed tube (1); The interior filling flexible material of sealed tube (1) (2), the anti-rust and lubrication grease that the exposed position of sealing steel strand (3) and sleeve pipe (4) overflow is fixed sealed tube (1) then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100706270A CN1328449C (en) | 2004-07-26 | 2004-07-26 | Method for converting stretching ends with binding prestress to stretching ends without binding prestress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100706270A CN1328449C (en) | 2004-07-26 | 2004-07-26 | Method for converting stretching ends with binding prestress to stretching ends without binding prestress |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1727600A CN1727600A (en) | 2006-02-01 |
| CN1328449C true CN1328449C (en) | 2007-07-25 |
Family
ID=35927095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100706270A Expired - Fee Related CN1328449C (en) | 2004-07-26 | 2004-07-26 | Method for converting stretching ends with binding prestress to stretching ends without binding prestress |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1328449C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101638892B (en) * | 2008-08-02 | 2012-08-15 | 柳州欧维姆机械股份有限公司 | Pressure-yielding anchorage device and reclaimable anchor cable |
| CN103115709B (en) * | 2013-01-22 | 2016-05-18 | 沈阳建筑大学 | A kind of for monitoring the cable wire meter protective device of deformed bar tension stress |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4934118A (en) * | 1987-11-04 | 1990-06-19 | Strabag Bau-Ag | Stressing element of fiber composites as well as process and device for the stressing and anchorage of such a stressing element |
| CN2367665Y (en) * | 1999-01-08 | 2000-03-08 | 柳州欧维姆建筑机械有限公司 | Built-in type anchor |
-
2004
- 2004-07-26 CN CNB2004100706270A patent/CN1328449C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4934118A (en) * | 1987-11-04 | 1990-06-19 | Strabag Bau-Ag | Stressing element of fiber composites as well as process and device for the stressing and anchorage of such a stressing element |
| CN2367665Y (en) * | 1999-01-08 | 2000-03-08 | 柳州欧维姆建筑机械有限公司 | Built-in type anchor |
Non-Patent Citations (3)
| Title |
|---|
| 无粘结预应力的施工方法 乔瑾，新疆有色金属 2001 * |
| 无粘结预应力的施工方法 乔瑾，新疆有色金属 2001;有粘结预应力筋施工工艺 李海琦，张达春，林业科技情报，第31卷第3期 2000 * |
| 有粘结预应力筋施工工艺 李海琦，张达春，林业科技情报，第31卷第3期 2000 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1727600A (en) | 2006-02-01 |
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Granted publication date: 20070725 Termination date: 20120726 |