CN101899812A - Backing plate under anchorage for post-tensioning method - Google Patents
Backing plate under anchorage for post-tensioning method Download PDFInfo
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- CN101899812A CN101899812A CN 201010254212 CN201010254212A CN101899812A CN 101899812 A CN101899812 A CN 101899812A CN 201010254212 CN201010254212 CN 201010254212 CN 201010254212 A CN201010254212 A CN 201010254212A CN 101899812 A CN101899812 A CN 101899812A
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- backing plate
- concrete
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- hole
- under anchorage
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Abstract
The invention discloses a backing plate under anchorage for a post-tensioning method. The middle of the backing plate under anchorage is provided with a center hole, and an installation fixing hole, a mudjacking hole and an overflow hole are also arranged in the backing plate under anchorage, wherein the distance between the overflow hole and the axis of center hole is less than the radius of a steel strand perforation of a template. By arranging the overflow hole in the backing plate under anchorage, the invention realizes that the vibration compactness of concrete can be judged according to whether concrete grout flows out of the overflow hole after injecting the concrete into a mold cavity at a prestress tensioned hole and vibrating the concrete with a vibrator. If no concrete grout flows out, the result indicates that the concrete is incompact and needs to be further vibrated; and if the concrete grout flows out, the result indicates that the concrete is compact. The backing plate under anchorage is more scientific in structural design, completely avoids the formation of holes behind the backing plate under anchorage, simultaneously prevents the backing plate under anchorage from being broken by pressure in the prestress tensioning process, improves both the quality and the safety of concrete members, and eliminates bubbles on the concrete surface so as to further improve the surface finish after concrete demolding.
Description
Technical field
The present invention relates to a kind of anchor backing plate, relate in particular to a kind of backing plate under anchorage for post-tensioning method.
Background technology
The building operations industry particularly in the road and bridge professional construction, generally adopts post stretching prefabricated reinforced concrete prestressed member in design, implements prestressed stretch-draw.The method of post stretching prefabricated reinforced concrete prestressed member is: at first, pre-buried bellows, with the endoporus of bellows as the prestressing force pulling eye; Then, at the pre-buried anchor backing plate of prestressed stretch-draw nose end, anchor backing plate is mounted on the template in the outside by bolt, the centre bore and the template that make the steel strand in the prestressing force pulling eye pass anchor backing plate; Again then, concrete is injected in the die cavity at prestressing force pulling eye place after, vibrate with vibrator; Again then, treat that concrete strength reaches requirement after, the prestressed stretch-draw operation of following road; At last, inject cement paste in the mud jacking hole from the anchor backing plate, fill the prestressing force pulling eye.
Backing plate under anchorage for post-tensioning method of the prior art, the middle part of this anchor backing plate is provided with centre bore, also is provided with on it to install and fix hole and mud jacking hole.In use mainly there is following deficiency in the anchor backing plate of this structure: after anchor backing plate is fixed on the template, then formed concrete cast obturator, after in the die cavity at concrete injection prestressing force pulling eye place, the vibration head that operating personnel only control vibrator is by rule of thumb controlled the vibration compacting degree of concrete, if taking place, human negligence will cause the concrete leakiness, thereby behind anchor backing plate, form the cavity, when carrying out the prestressed stretch-draw operation, ground tackle both may occur inwardly compresses into anchor backing plate, may occur anchor backing plate again is crushed, security incident easily takes place, even causes the concrete member to scrap.
Summary of the invention
At the prior art above shortcomings, the invention provides a kind of backing plate under anchorage for post-tensioning method of controlling concrete pouring compactness, by using this anchor backing plate can guarantee anchor backing plate concrete compactness, stopped the cavity to occur behind the anchor backing plate, anchor backing plate is not destroyed during prestressed stretch-draw, and has improved safety.
Backing plate under anchorage for post-tensioning method provided by the invention, the middle part of this anchor backing plate is provided with centre bore, also is provided with on it to install and fix hole, mud jacking hole and spout hole, and the axial line distance in described spout hole distance center hole is less than the radius of the steel strand perforation of template.
Further, described spout hole is four, is distributed in upper and lower, four positions in a left side and the right side of anchor backing plate, and the edge of the steel strand perforation of described template is positioned at the outside of four spout holes.
Backing plate under anchorage for post-tensioning method of the present invention is provided with spout hole, and the axial line distance in spout hole distance center hole compared with prior art, has following advantage less than the radius of the steel strand perforation of template:
1, the present invention is provided with spout hole on anchor backing plate, after in the die cavity at concrete injection prestressing force pulling eye place, vibrate, whether have the concrete slurry to flow out the vibration compacting degree of judging concrete according to spout hole with vibrator, if there is the concrete slurry to flow out the concrete leakiness is not described then, need continues to vibrate; If the concrete slurry flows out, illustrate that then concrete is closely knit.This structure design is science more, has avoided forming behind the anchor backing plate cavity fully, and the phenomenon that anchor backing plate is crushed when also having avoided prestressed stretch-draw had simultaneously both improved the quality of concrete member, had improved safety again.
2, anchor backing plate of the present invention has not only been controlled outside the anchor backing plate concrete compactness, has also eliminated the bubble on concrete surface, and concrete demoulding rear surface fineness further improves.
Description of drawings
Fig. 1 is the front view of backing plate under anchorage for post-tensioning method of the present invention;
Fig. 2 is a backing plate under anchorage for post-tensioning method of the present invention structural representation in use.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done to describe in further detail.
Fig. 1 is the front view of backing plate under anchorage for post-tensioning method of the present invention, and Fig. 2 is a backing plate under anchorage for post-tensioning method of the present invention structural representation in use, as shown in the figure.Backing plate under anchorage for post-tensioning method is provided with centre bore 2 at the middle part of this anchor backing plate 1, anchor backing plate 1 is provided with three and installs and fixes hole 3 and a mud jacking hole 4, and upper and lower, the left side and uniform four spout holes 5 of right and relative centre bore 2 symmetries of anchor backing plate 1, the axial line distance in described spout hole 5 distance center holes 2 is less than the radius of the steel strand perforation 7 of template 6, and the edge of the steel strand perforation 7 of promptly described template 6 is positioned at the outside of four spout holes 5.
When using this backing plate under anchorage for post-tensioning method, anchor backing plate 1 is embedded in the prestressed stretch-draw nose end, penetrate bolt in the hole and be mounted on the template 6 installing and fixing of anchor backing plate 1, outside four spout holes 5 on the anchor backing plate 1 are positioned at the steel strand perforation 7 of template 6 and are exposed to.
After in the die cavity at concrete injection prestressing force pulling eye place, vibrate with vibrator, whether observation spout hole 5 has the concrete slurry to flow out the vibration compacting degree of judging concrete, as if there being the concrete slurry to flow out the concrete leakiness is not described then, need continue to vibrate, and flows out until the concrete slurry; The observation spout hole has concrete slurry to flow out, and illustrates that then concrete is closely knit, stops up spout hole 5 with plug simultaneously, therefore this backing plate under anchorage for post-tensioning method structure science more, and judge that the vibration compacting degree of concrete is more accurate.
After treating that concrete strength reaches requirement, adopt ground tackle and jack to carry out the prestressed stretch-draw operation, last, inject cement pastes in the mud jacking hole 4 from the anchor backing plate 1, fill the prestressing force pulling eye.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (2)
1. backing plate under anchorage for post-tensioning method, the middle part of this anchor backing plate (1) is provided with centre bore (2), also is provided with on it to install and fix hole (3) and mud jacking hole (4); It is characterized in that: also be provided with spout hole (5) on the described anchor backing plate (1), the axial line distance in described spout hole (5) distance center hole (2) is less than the radius of the steel strand perforation (7) of template (6).
2. backing plate under anchorage for post-tensioning method according to claim 1, it is characterized in that: described spout hole (5) is four, be distributed in upper and lower, four positions in a left side and the right side of anchor backing plate (1), the edge of the steel strand perforation (7) of described template (6) is positioned at the outside of four spout holes (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010254212 CN101899812A (en) | 2010-08-16 | 2010-08-16 | Backing plate under anchorage for post-tensioning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010254212 CN101899812A (en) | 2010-08-16 | 2010-08-16 | Backing plate under anchorage for post-tensioning method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101899812A true CN101899812A (en) | 2010-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010254212 Pending CN101899812A (en) | 2010-08-16 | 2010-08-16 | Backing plate under anchorage for post-tensioning method |
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| CN (1) | CN101899812A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322139A (en) * | 2011-06-27 | 2012-01-18 | 中冶建工集团有限公司 | End head formwork for T-shaped beam formed by casting moulding |
| CN104690516A (en) * | 2015-03-20 | 2015-06-10 | 柳州市友健机械有限公司 | Processing method for flat type anchor plate |
| CN104759844A (en) * | 2015-03-20 | 2015-07-08 | 柳州市友健机械有限公司 | Processing method of circular anchor bearing plate |
| CN106012838A (en) * | 2016-05-13 | 2016-10-12 | 中冶交通建设集团有限公司 | Anchor bearing plate for post-tensioning method prestressed construction and use method of anchor bearing plate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2311545Y (en) * | 1997-11-16 | 1999-03-24 | 中外合资柳州欧维姆建筑机械有限公司 | Flat anchoring backing board |
| FR2783266A1 (en) * | 1998-09-16 | 2000-03-17 | Spie Precontrainte | Replaceable anchor for concrete structure pre-stressing cable has funnel, tube and anchoring assembly with cap |
| CN2527622Y (en) * | 2002-03-05 | 2002-12-25 | 柳州市建筑机械总厂 | Anchoring bottom plate |
| CN101307605A (en) * | 2008-06-06 | 2008-11-19 | 中冶天工上海十三冶建设有限公司 | High precision apparatus foundation mounting method |
-
2010
- 2010-08-16 CN CN 201010254212 patent/CN101899812A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2311545Y (en) * | 1997-11-16 | 1999-03-24 | 中外合资柳州欧维姆建筑机械有限公司 | Flat anchoring backing board |
| FR2783266A1 (en) * | 1998-09-16 | 2000-03-17 | Spie Precontrainte | Replaceable anchor for concrete structure pre-stressing cable has funnel, tube and anchoring assembly with cap |
| CN2527622Y (en) * | 2002-03-05 | 2002-12-25 | 柳州市建筑机械总厂 | Anchoring bottom plate |
| CN101307605A (en) * | 2008-06-06 | 2008-11-19 | 中冶天工上海十三冶建设有限公司 | High precision apparatus foundation mounting method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322139A (en) * | 2011-06-27 | 2012-01-18 | 中冶建工集团有限公司 | End head formwork for T-shaped beam formed by casting moulding |
| CN104690516A (en) * | 2015-03-20 | 2015-06-10 | 柳州市友健机械有限公司 | Processing method for flat type anchor plate |
| CN104759844A (en) * | 2015-03-20 | 2015-07-08 | 柳州市友健机械有限公司 | Processing method of circular anchor bearing plate |
| CN106012838A (en) * | 2016-05-13 | 2016-10-12 | 中冶交通建设集团有限公司 | Anchor bearing plate for post-tensioning method prestressed construction and use method of anchor bearing plate |
| CN106012838B (en) * | 2016-05-13 | 2018-06-05 | 中冶交通建设集团有限公司 | A kind of Post-tension Prestress Construction anchor plate and its application method |
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Open date: 20101201 |