CN101905478A - Control method of concrete pouring compactness for anchor backing plate by post-tensioning method - Google Patents
Control method of concrete pouring compactness for anchor backing plate by post-tensioning method Download PDFInfo
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- CN101905478A CN101905478A CN 201010254211 CN201010254211A CN101905478A CN 101905478 A CN101905478 A CN 101905478A CN 201010254211 CN201010254211 CN 201010254211 CN 201010254211 A CN201010254211 A CN 201010254211A CN 101905478 A CN101905478 A CN 101905478A
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Abstract
The invention discloses a control method of concrete pouring compactness of an anchor backing plate by a post-tensioning method, which comprises the following steps: embedding the anchor backing plate at the outer end of a pre-stressing tensioning hole; installing the anchor backing plate on a template; enabling a steel strand in the pre-stressing tensioning hole to pass through a center hole of the anchor backing plate and the template; arranging an overflow hole on the anchor backing plate; arranging an opening for exposing the overflow hole on the template; after concrete is poured into a mold cavity at the pre-stressing tensioning hole, vibrating by a vibrator and observing whether concrete slurry outflows from the overflow hole; if the concrete slurry does not outflow, continuing vibrating; and if the concrete slurry outflows, blocking the overflow hole with a core plug. The invention is more scientific and accurate to judge the concrete vibrating compactness according to whether the concrete slurry is in the overflow hole, completely avoids cavities formed in the anchor backing plate, and simultaneously avoids the phenomenon that the anchor backing plate is crushed in the process of pre-stressing tensioning, thereby increasing the quality of a concrete member, increasing the safety, eliminating the air bubbles on the surface of the concrete, and further improving the finish of the surface after the concrete is demolded.
Description
Technical field
The present invention relates to a kind of concrete pouring compactness control method, relate in particular to a kind of control method of concrete pouring compactness for anchor backing plate by post-tensioning method.
Background technology
The construction industry particularly in the road and bridge professional construction, generally adopts post stretching prefabricated reinforced concrete prestressed component in design, implements prestressed stretch-draw.
In the prior art, the method for post stretching prefabricated reinforced concrete prestressed component 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 by bolt, the centre bore and the template that make the steel strand wires 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 mortar in the mud jacking hole from the anchor backing plate, fill the prestressing force pulling eye.
Mainly there is following deficiency in the method for above-mentioned post stretching prefabricated reinforced concrete prestressed component: 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 cause the concrete member to scrap, therefore, the vibration compacting degree of the wayward concrete of this method, and science not very.
Summary of the invention
At the prior art above shortcomings, the invention provides a kind of control method of concrete pouring compactness for anchor backing plate by post-tensioning method of controlling concrete pouring compactness, this method has guaranteed anchor backing plate concrete packing, stopped the cavity to occur behind the anchor backing plate, anchor backing plate is not destroyed during prestressed stretch-draw, and has improved security.
Control method of concrete pouring compactness for anchor backing plate by post-tensioning method provided by the invention at the pre-buried anchor backing plate of prestressed stretch-draw nose end, is installed on the template anchor backing plate, centre bore and template that the steel strand wires in the prestressing force pulling eye pass anchor backing plate; Described anchor backing plate is provided with spout hole, also is provided with on the described template spout hole is exposed to outer hole; After in the die cavity at concrete injection prestressing force pulling eye place, vibrate with vibrator, whether the observation spout hole has the concrete slurry to flow out, and as if there being the concrete slurry to flow out, then continuing to vibrate and flows out until the concrete slurry; If the concrete slurry flows out, then stop up spout hole with plug.
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 at described hole is positioned at the outside of four spout holes.
Compared with prior art, control method of concrete pouring compactness for anchor backing plate by post-tensioning method of the present invention has following advantage:
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.Compare with the vibration compacting degree of only controlling concrete by rule of thumb, the vibration compacting degree that whether has concrete slurry to flow out to judge concrete by the observation spout hole is science more, and more accurate; Avoided forming behind the anchor backing plate cavity fully, 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 security again.
2, the present invention has not only controlled outside the anchor backing plate concrete packing, has also eliminated the bubble on concrete surface, and concrete demoulding rear surface fineness further improves.
Description of drawings
Fig. 1 carries out the structural representation of vibration compacting degree control for adopting method of the present invention;
Fig. 2 is the front view of anchor backing plate;
Fig. 3 is the structural representation of prestressed stretch-draw.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done to describe in further detail.
Fig. 1 carries out the structural representation of vibration compacting degree control for adopting method of the present invention, and Fig. 2 is the front view of anchor backing plate, as shown in the figure.Control method of concrete pouring compactness for anchor backing plate by post-tensioning method, pre-buried bellows 7, with the endoporus of bellows 7 as the prestressing force pulling eye; At the pre-buried anchor backing plate 1 of prestressed stretch-draw nose end, the middle part of anchor backing plate 1 is provided with centre bore 4, upper and lower, the left side and uniform four spout holes 5 of right and relative centre bore 4 symmetries of anchor backing plate 1, and also be provided with bolt hole 8 and mud jacking hole 9 on the anchor backing plate 1, be mounted on the template 2 by bolt, template 2 is provided with spout hole 5 is exposed to outer hole 6, and the edge at described hole 6 is positioned at the outside of four spout holes 5; Make the steel strand wires 3 in the prestressing force pulling eye pass the centre bore of anchor backing plate 1 and the hole 6 of template 2.
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 the concrete slurry to flow out, and illustrates that then concrete is closely knit, stops up spout hole 5 with plug simultaneously.Compare with the vibration compacting degree of only controlling concrete by rule of thumb of the prior art, the vibration compacting degree that whether has concrete slurry to flow out to judge concrete by spout hole 5 is science more, and more accurate.
After treating that concrete strength reaches requirement, adopt ground tackle 10 and jack to carry out prestressed stretch-draw operation (as shown in Figure 3), owing to avoided fully forming the cavity behind the anchor backing plate, the phenomenon that anchor backing plate is crushed when also having avoided prestressed stretch-draw simultaneously, and operating personnel's safety also is greatly enhanced.At last, inject cement mortars in the mud jacking hole 9 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. control method of concrete pouring compactness for anchor backing plate by post-tensioning method, at the pre-buried anchor backing plate of prestressed stretch-draw nose end (1), anchor backing plate (1) is installed on the template (2), centre bore (4) and template (2) that the steel strand wires (3) in the prestressing force pulling eye pass anchor backing plate (1); It is characterized in that: described anchor backing plate (1) is provided with spout hole (5), also is provided with on the described template (2) spout hole (5) is exposed to outer hole (6); 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, and as if there being the concrete slurry to flow out, then continuing to vibrate and flows out until the concrete slurry; If the concrete slurry flows out, then stop up spout hole (5) with plug.
2. control method of concrete pouring compactness for anchor backing plate by 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 described hole (6) is positioned at the outside of four spout holes (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010254211XA CN101905478B (en) | 2010-08-16 | 2010-08-16 | Control method of concrete pouring compactness for anchor backing plate by post-tensioning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010254211XA CN101905478B (en) | 2010-08-16 | 2010-08-16 | Control method of concrete pouring compactness for anchor backing plate by post-tensioning method |
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| Publication Number | Publication Date |
|---|---|
| CN101905478A true CN101905478A (en) | 2010-12-08 |
| CN101905478B CN101905478B (en) | 2011-12-14 |
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| CN201010254211XA Expired - Fee Related CN101905478B (en) | 2010-08-16 | 2010-08-16 | Control method of concrete pouring compactness for anchor backing plate by post-tensioning method |
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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 |
| 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 |
| CN101393136A (en) * | 2008-10-24 | 2009-03-25 | 上海建科预应力技术工程有限公司 | Post-tensioned concrete structure pore squeezing quality detection method |
-
2010
- 2010-08-16 CN CN201010254211XA patent/CN101905478B/en not_active Expired - Fee Related
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 |
| 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 |
| CN101393136A (en) * | 2008-10-24 | 2009-03-25 | 上海建科预应力技术工程有限公司 | Post-tensioned concrete structure pore squeezing quality detection method |
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|---|---|
| CN101905478B (en) | 2011-12-14 |
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