CN2563216Y - Slow adhesive prestress rib - Google Patents
Slow adhesive prestress rib Download PDFInfo
- Publication number
- CN2563216Y CN2563216Y CN 02240778 CN02240778U CN2563216Y CN 2563216 Y CN2563216 Y CN 2563216Y CN 02240778 CN02240778 CN 02240778 CN 02240778 U CN02240778 U CN 02240778U CN 2563216 Y CN2563216 Y CN 2563216Y
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- prestress
- sheath
- concrete
- utility
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Abstract
The utility model discloses a slow adhesive prestress rib which comprises a prestress steel strand and a sheath, wherein, an adhesive layer capable of being coagulated only after a certain period of time is filled between the prestress steel strand and the sheath, the outer surface of the sheath is provided with bamboo-shaped heaves. Thus, for the slow adhesive prestress rib of the utility model, the prestress rib and the concrete can relatively slide at reinforcement distribution and tension stages, thereby possessing the advantages of non-adhesive prestress technology; after the tension, the grouting is not needed, when the certain period of time is reached (the time can be between two months and one year according to the need), the adhesive layer begins to coagulate, thereby the prestress rib and the concrete are entirely cemented; during the force bearing, the utility model has the advantages of adhesive prestress structure, can limit the width of the crack and improve the ductibility.
Description
Technical field
The utility model relates to the presstressed reinforcing steel that uses in a kind of prestressed reinforced concrete, refers to a kind of delayed bonding prestressed tendon especially.
Background technology
General presstressed reinforcing steel is divided into two kinds of bonded prestressed tendon (bare wire) and unbonded prestressing tendons, bonded prestressed tendon is meant between presstressed reinforcing steel and the concrete and bonds fully, do not slide between prestressing force and the concrete in the loading process, and unbonded prestressing tendon is meant that can overcome static friction between presstressed reinforcing steel and the concrete slides.
Bonded prestressed tendon is at first to form the duct in concrete when using, presstressed reinforcing steel can penetrate before concreting also and can penetrate behind concrete formation, in the duct, pour into cement paste after finishing Deng tension of prestressed tendon, make between presstressed reinforcing steel and the concrete and bond fully, can limit the crack width of concrete like this, improve structure ductility, improve structure endergonic ability under geological process, help structural seismic, but bonded prestressed tendon operating process more complicated, construction period is longer.
Unbonded prestressing tendon is by preservation grease coating material layer outside prestress wire, wraps polyethylene or polypropylene cover again, so that anticorrosion grease and prestress wire and concrete separating are opened.During use, arrange unbonded prestressing tendon, after-pouring concrete earlier, reach designing requirement intensity Deng concrete and begin stretch-draw, presstressed reinforcing steel acts on prestressing force on the concrete by the termination ground tackle, can slide between mid portion presstressed reinforcing steel and the concrete like this, and frictional force is minimum.This shows, unbonded prestressing tendon is more convenient in force, but, in case concrete cracking, presstressed reinforcing steel can not limit carrying out of crack, and ductility is relatively poor, and anti-seismic performance can not show a candle to bonded prestress, and owing to can not bond between presstressed reinforcing steel and the concrete, presstressed reinforcing steel can not be given full play to its tensile strength.
Summary of the invention
The purpose of this utility model provides a kind of construction and structure ductility delayed bonding prestressed tendon preferably be convenient to.
For achieving the above object, the utility model is taked following design scheme: a kind of delayed bonding prestressed tendon, it comprises prestress wire and sheath, it is characterized in that: be filled with the adhesive layer that needs certain time limit of process just can solidify between described prestress wire and the sheath, described jacket outer surface has ring shape projection.
Described adhesive layer is acrylic acid or the epoxy resin that is mixed with retarding agent.
Described sheath is made by high-strength polyethylene or polypropylene.
The utility model has the advantages that: 1, the utility model delayed bonding prestressed tendon, it comprises prestress wire and sheath, it is characterized in that: be filled with the adhesive layer that needs certain time limit of process just can solidify between prestress wire and the sheath, jacket outer surface has ring shape projection.The utility model delayed bonding prestressed tendon can slide between cloth muscle and pulling anchor cable stage presstressed reinforcing steel and concrete like this, thereby advantage with Non-cohesive Prestressing Force Technology, and stretch-draw needn't be in the milk after finishing, arrive certain time limit when the time, as required, the time can be between 2 months to 1 year, adhesive layer begins to solidify, thereby will bond fully between presstressed reinforcing steel and the concrete, have the advantage of bonded prestress structure in the loading process, can limit crack width, improve ductility.2, therefore the utility model delayed bonding prestressed tendon can strengthen the adhesion stress between delayed bonding prestressed tendon and the surrounding concrete because its jacket outer surface has ring shape projection.
Description of drawings
Fig. 1 is a structural representation of the present utility model
The specific embodiment
As shown in Figure 1, the utility model delayed bonding prestressed tendon, it comprises prestress wire 1 and sheath 2, it is characterized in that: be filled with the adhesive layer 3 that needs certain time limit of process just can solidify between prestress wire 1 and the sheath 2, sheath 2 external surfaces have ring shape projection 4.
Claims (3)
1, a kind of delayed bonding prestressed tendon, it comprises prestress wire and sheath, it is characterized in that: be filled with the adhesive layer that needs certain time limit of process just can solidify between described prestress wire and the sheath, described jacket outer surface has ring shape projection.
2, delayed bonding prestressed tendon according to claim 1 is characterized in that: described adhesive layer is acrylic acid or the epoxy resin that is mixed with retarding agent.
3, delayed bonding prestressed tendon according to claim 1 and 2 is characterized in that: described sheath is made by high-strength polyethylene or polypropylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02240778 CN2563216Y (en) | 2002-07-18 | 2002-07-18 | Slow adhesive prestress rib |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02240778 CN2563216Y (en) | 2002-07-18 | 2002-07-18 | Slow adhesive prestress rib |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2563216Y true CN2563216Y (en) | 2003-07-30 |
Family
ID=33713795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02240778 Expired - Lifetime CN2563216Y (en) | 2002-07-18 | 2002-07-18 | Slow adhesive prestress rib |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2563216Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345407A (en) * | 2011-07-21 | 2012-02-08 | 从卫民 | High-tension cable iron tower base |
| CN105401696A (en) * | 2015-12-21 | 2016-03-16 | 北京兆福基建材科技发展有限公司 | Quick-bonding pre-stress steel strand, and inducer and preparation method of the inducer |
| CN110184913A (en) * | 2019-06-04 | 2019-08-30 | 中铁第四勘察设计院集团有限公司 | A kind of slow cohesion weldering nail, steel-concrete composite beam and its forming method |
| CN110821046A (en) * | 2019-11-20 | 2020-02-21 | 北京市建筑工程研究院有限责任公司 | Slow-bonding prestressed tendon and preparation method thereof |
| CN115162731A (en) * | 2022-06-16 | 2022-10-11 | 北京市政路桥股份有限公司 | Pool construction method based on prestress engineering |
-
2002
- 2002-07-18 CN CN 02240778 patent/CN2563216Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345407A (en) * | 2011-07-21 | 2012-02-08 | 从卫民 | High-tension cable iron tower base |
| CN105401696A (en) * | 2015-12-21 | 2016-03-16 | 北京兆福基建材科技发展有限公司 | Quick-bonding pre-stress steel strand, and inducer and preparation method of the inducer |
| CN110184913A (en) * | 2019-06-04 | 2019-08-30 | 中铁第四勘察设计院集团有限公司 | A kind of slow cohesion weldering nail, steel-concrete composite beam and its forming method |
| CN110821046A (en) * | 2019-11-20 | 2020-02-21 | 北京市建筑工程研究院有限责任公司 | Slow-bonding prestressed tendon and preparation method thereof |
| CN115162731A (en) * | 2022-06-16 | 2022-10-11 | 北京市政路桥股份有限公司 | Pool construction method based on prestress engineering |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA METALLURGICAL CONSTRUCTION RESEARCH INSTITUT Free format text: FORMER OWNER: MINISTRY OF METALLURGICAL INDUSTRY BUILDING RESEARCH GENERAL INSTITUTE. Effective date: 20100129 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20100129 Address after: Beijing city Haidian District Xitucheng Road 33, zip code: 100088 Co-patentee after: China Jingye Engineering Technology Co., Ltd. Patentee after: China metallurgy Architecture Research Institute Co., Ltd. Address before: Beijing city Haidian District Xitucheng Road 33, zip code: 100088 Co-patentee before: Li Peixun Patentee before: General Institute of architectural research, Ministry of metallurgical industry Co-patentee before: Shang Renjie Co-patentee before: Wu Zhuanqin |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120718 Granted publication date: 20030730 |