CN101818567B - Rubber bar pore-forming device for enlarging prestressed aperture of cross section - Google Patents
Rubber bar pore-forming device for enlarging prestressed aperture of cross section Download PDFInfo
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- CN101818567B CN101818567B CN2010101396493A CN201010139649A CN101818567B CN 101818567 B CN101818567 B CN 101818567B CN 2010101396493 A CN2010101396493 A CN 2010101396493A CN 201010139649 A CN201010139649 A CN 201010139649A CN 101818567 B CN101818567 B CN 101818567B
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- rubber bar
- bealock
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- prestressed
- cross
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Abstract
The invention discloses a pore-forming device for enlarging a prestressed aperture of a cross section, which solves the problem of generating different numbers of exudations at different positions of the same aperture. The device comprises a rubber bar on the upper part of a bealock, a rubber bar on the lower part of the bealock and an outsourced rubber bar. A convex on a trapezoid cross section at the bottom of the rubber bar on the upper part of the bealock is embedded into a concave groove of the rubber bar on the lower part of the bealock; and at a bending section of the prestressed aperture, the outsourced rubber bar covers the rubber bar on the upper part of the bealock. The inner shape of the cross section of the outsourced rubber bar is matched with the shape of the cross section of the rubber bar on the upper part of the bealock; and the ratio of the total area of pore space of the prestressed aperture formed by the outsourced rubber bar and the rubber bar on the upper part of the bealock to the area of the pore space on the lower part of the bealock is 10 to 30 percent. In a pore-forming process of the prestressed aperture, the device is used for forming the prestressed aperture with an enlarged cross section, thereby solving the problem of generating different numbers of exudations at different positions of the same aperture and ensuring that a grouting material around prestressed reinforced steel fulfills the aim of completely compacting.
Description
Technical field
The present invention relates to a kind of prestressed pore passage rubber bar hole-forming device, refer in particular to the rubber bar device of moulding band bealock enlarged cross section prestressed pore passage.
Background technology
In present civil engineering industry post stressed concrete construction, the pore-forming technique of prestressed pore passage has two kinds, be bellows pore-forming technique and rubber pulling rod rod pore-forming technique, but the prestressed pore passage of employed this two kinds of pore-forming technique institutes moulding of engineering circle at present is uniform section in a duct.
Concerning prestressed member, the bleeding of bottom position horizontal pipe is less, and the top duct that upwards bends up is light than cement paste because of water density, and the bleeding rising phenomenon appears, thereby the bleeding that causes the top duct that upwards bends up takes place more than the excreting water phenomenon of bottom position horizontal pipe, and prismatic prestressed pore passage can not well solve same duct produces the varying number bleeding at the diverse location place problem, easily causes the corrosion of presstressed reinforcing steel, influences the durability of prestress system.
Summary of the invention
Technical problem to be solved by this invention: solve same duct produces the varying number bleeding at the diverse location place problem, guarantee that the grouting agent around the presstressed reinforcing steel reaches closely knit purpose fully.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of enlarged cross section prestressed pore passage hole-forming device, this device comprises: bealock top rubber bar, bealock bottom rubber bar and outer-enwraped type rubber bar.The projection of the trapezoid cross section, bottom of described bealock top rubber bar embeds in the Baltimore groove of bealock bottom rubber bar; In the section of bending up of prestressed pore passage, described outer-enwraped type rubber bar is buckled in the outside of bealock top rubber bar.
The interior shape in described outer-enwraped type rubber bar cross section and the cross sectional shape of bealock top rubber bar match, and the vestibule gross area of the prestressed pore passage of outer-enwraped type rubber bar and the moulding of bealock top rubber bar institute and the ratio of bealock bottom hole cavity area are 10%～30%.
Use said apparatus, come the prestressed pore passage of moulding enlarged cross section.Guarantee that the grouting agent around the presstressed reinforcing steel reaches closely knit purpose fully.
The invention has the beneficial effects as follows: the section of bending up at prestressed pore passage is used a kind of enlarged cross section prestressed pore passage rubber bar hole-forming device, prestressed pore passage at the diverse location place moulding different cross section of same prestressed pore passage, solve same duct produces the varying number bleeding at the diverse location place problem, guarantee that the grouting agent around the presstressed reinforcing steel reaches closely knit purpose fully.
Description of drawings
Fig. 1 is a kind of enlarged cross section prestressed pore passage rubber bar hole-forming device front view.
Wherein, 1 is the outer-enwraped type rubber bar, and 2 is bealock top rubber bar, and 3 is bealock bottom rubber bar, and 4 is the inner reserving hole channel of bealock bottom rubber bar.
Fig. 2 is an outer-enwraped type rubber bar cross sectional representation.
Fig. 3 is outer-enwraped type rubber bar and the supporting use schematic diagram of bealock top rubber bar.
Fig. 4 is I among Fig. 3-I schematic cross-section.
Fig. 5 is II among Fig. 3-II schematic cross-section.
The specific embodiment
The present invention will be further described by embodiment below in conjunction with accompanying drawing:
Embodiment one: as shown in the figure, what the present invention described is a kind of enlarged cross section prestressed pore passage hole-forming device.This device comprises: bealock top rubber bar 2, bealock bottom rubber bar 3 and outer-enwraped type rubber bar 1.The projection of the trapezoid cross section, bottom of bealock top rubber bar 2 embeds the Baltimore groove of bealock bottom rubber bar 3, in the section of bending up of prestressed pore passage, at outer-enwraped type rubber bar 1 of the outside of described bealock top rubber bar 2 button.
In prestressing force simply supported beam construction, the prestress hole road shape is flat segments, is the section of bending up at the beam two ends that bending up the angle is 4 ° at span centre, and the prestressed pore passage cross sectional shape is a bealock shape, and is the prestressed pore passage of enlarged cross section in the section of bending up.
In the pore forming process,, adopt the rubber pulling rod bar device pore-forming of the compound cross-section of forming by bealock top rubber bar 2 and bealock bottom rubber bar 3 in the flat segments of simply supported beam; In the section of bending up of simply supported beam, outer-enwraped type rubber bar 1 is buckled in the outside of bealock top rubber bar 2, with the 3 supporting uses of bealock bottom rubber bar.The ratio of the vestibule area of the vestibule gross area of the prestressed pore passage of outer-enwraped type rubber bar 1 and 2 moulding of bealock top rubber bar and 3 moulding of bealock bottom rubber bar is taken as 10%.
After treating that concrete reaches withdrawing rubber bar desirable strength, bealock top rubber bar 2 and bealock bottom rubber bar 3 are extracted out, again outer-enwraped type rubber bar 1 is extracted out, i.e. the prestressed pore passage of plastic enlarged cross section.
Embodiment two:
Be with the difference of embodiment one:
In the construction of prestressing force simply supported beam, the prestress hole road shape is flat segments, is the section of bending up at the beam two ends that bending up the angle is 6 ° at span centre.The ratio of the vestibule area of the vestibule gross area of the prestressed pore passage of outer-enwraped type rubber bar 1 and 2 moulding of bealock top rubber bar and 3 moulding of bealock bottom rubber bar is taken as 30%.
The rubber bar of compound cross-section used in the present invention is on March 19th, 2010, the denomination of invention of Beijing Jiaotong University's application: " the rubber pulling rod bar device of moulding band bealock prestressed pore passage ", and application number: 201010129701.7 device:
A kind of rubber pulling rod bar device of moulding band bealock prestressed pore passage, this rubber pulling rod bar device comprises: bealock top rubber bar and bealock bottom rubber bar, the projection of the trapezoid cross section, bottom of bealock top rubber bar embeds in the Baltimore groove of bealock bottom rubber bar.
The cross sectional shape of described bealock top rubber bar is irregular ellipse, and in the bottom one projection is arranged; The cross sectional shape of bealock bottom rubber bar is oval, and at its minor axis place one groove is arranged.
The ratio of the area of described bealock top rubber bar and the area of bealock bottom rubber bar is 5%～20%; The area of bealock bottom rubber bar is determined according to employed standard in the construction by the presstressed reinforcing steel area.
Describedly one reserving hole channel is set, when construction, penetrates steel strand at bealock bottom rubber bar center position; The area of reserving hole channel is consistent with the section area that penetrates steel strand.
Claims (2)
1. enlarged cross section prestressed pore passage hole-forming device, this device comprises: bealock top rubber bar and bealock bottom rubber bar, the projection of the trapezoid cross section, bottom of bealock top rubber bar embed in the Baltimore groove of bealock bottom rubber bar; It is characterized in that: in the section of bending up of prestressed pore passage, at outer-enwraped type rubber bar of the outside of described bealock top rubber bar button.
2. according to the described a kind of enlarged cross section prestressed pore passage hole-forming device of claim 1, it is characterized in that: the cross sectional shape of the interior shape in this outer-enwraped type rubber bar cross section and bealock top rubber bar matches, and the vestibule gross area of the prestressed pore passage of outer-enwraped type rubber bar and the moulding of bealock top rubber bar institute and the ratio of bealock bottom hole cavity area are 10%～30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101396493A CN101818567B (en) | 2010-04-01 | 2010-04-01 | Rubber bar pore-forming device for enlarging prestressed aperture of cross section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101396493A CN101818567B (en) | 2010-04-01 | 2010-04-01 | Rubber bar pore-forming device for enlarging prestressed aperture of cross section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101818567A CN101818567A (en) | 2010-09-01 |
| CN101818567B true CN101818567B (en) | 2011-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101396493A Expired - Fee Related CN101818567B (en) | 2010-04-01 | 2010-04-01 | Rubber bar pore-forming device for enlarging prestressed aperture of cross section |
Country Status (1)
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| CN (1) | CN101818567B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT375716B (en) * | 1980-08-16 | 1984-09-10 | Dyckerhoff & Widmann Ag | RECOVERABLE FORMWORK FOR THE ANCHORING AREA OF A TENSION LINK IN A CONCRETE COMPONENT |
| CN1287202A (en) * | 1999-09-03 | 2001-03-14 | 柳州欧维姆建筑机械有限公司 | Vacuum grouting process and its sealed anchor cable |
| JP3937945B2 (en) * | 2002-07-04 | 2007-06-27 | セイコーエプソン株式会社 | Display device and electronic apparatus equipped with the same |
| CN2816542Y (en) * | 2005-04-30 | 2006-09-13 | 中铁一局集团第四工程有限公司 | Large-diameter plastic corrugated pipe for prestressed concrete vacuum slurry pressing |
| JP2007040052A (en) * | 2005-08-05 | 2007-02-15 | Kajima Corp | Steel for unbonded prestressed concrete, its manufacturing method and structure |
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2010
- 2010-04-01 CN CN2010101396493A patent/CN101818567B/en not_active Expired - Fee Related
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| CN101818567A (en) | 2010-09-01 |
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