CN102261041B - End part fixing device of pre-buried rubber tube of post-tensioned prestressed bridge - Google Patents
End part fixing device of pre-buried rubber tube of post-tensioned prestressed bridge Download PDFInfo
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- CN102261041B CN102261041B CN 201110134417 CN201110134417A CN102261041B CN 102261041 B CN102261041 B CN 102261041B CN 201110134417 CN201110134417 CN 201110134417 CN 201110134417 A CN201110134417 A CN 201110134417A CN 102261041 B CN102261041 B CN 102261041B
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Abstract
The invention provides an end part fixing device of a pre-buried rubber tube of a post-tensioned prestressed bridge for solving the problem of forming quality of a prestressed steel bar pore canal of the post-tensioned prestressed bridge. The end part fixing device comprises an upper sleeve, a lower sleeve, a big nut and a clamping piece, wherein the lower half part of the upper sleeve is a steel tube, the upper half part of the upper sleeve is a flared tube and a screw thread in reverse direction is arranged on the surface at the front end of the steel tube; the upper half part of the lower sleeve is the steel tube, the lower part of the lower sleeve is the flared tube and the screw thread in positive direction is arranged on the surface at the front end of the steel tube; the screw thread in the position direction is arranged at one end on the inner side of the big nut and the screw thread in the reverse direction is arranged on the other side of the big nut; and the section of the clamping piece is in the shape of a wedge and four circular holes are formed on the side surface of the big nut. Through the method of rotating the screw threads in the position direction and the reverse direction of the big nut, the upper sleeve and the lower sleeve, the sleeves can drive the rubber tube to tension, thereby achieving the desired fixing effect, preventing the pre-buried rubber tube from deforming and displacing during pouring of concrete, enabling the formed pore canal to be straight and ensuring that the friction resistance of the pore canal is in line with design requirements.
Description
Technical field
The present invention relates to a kind of fastening devices, be specially the pre-buried sebific duct of a kind of post-tensioned prestressing bridge end fastening devices.
Background technology
The post-tensioned prestressing bridge is the bridge that adopts post-tensioned construction, therefore need form the duct of prestressed reinforcing bar at concrete beam body.Method commonly used is pre-buried sebific duct before concreting, extracts sebific duct after concreting is solidified.But pre-buried sebific duct was installed and was put laying along cage of reinforcement in the past, constraint is unfixing reliably, so when concreting, because the shock and vibration that concrete falls rod is inserted crowded the bumping when smashing, pre-buried sebific duct often is out of shape displacement, thereby make the duct of moulding also just not straight, caused the duct frictional resistance to strengthen the unmanageable adverse consequences of prestressed stretch-draw value.
Summary of the invention
For solving the problem of post-tensioned prestressing bridge prestress reinforcing bar duct Forming Quality, the invention provides the pre-buried sebific duct of a kind of post-tensioned prestressing bridge end fastening devices.
For addressing the above problem, the pre-buried sebific duct of a kind of post-tensioned prestressing bridge of the present invention end fastening devices comprises sleeve pipe, setting of casing, big nut and intermediate plate, and the Lower Half of last sleeve pipe is a steel pipe, the first half is an oviduct, and the steel pipe front-end surface is provided with reverse screw thread; The cased first half is a steel pipe, and Lower Half is an oviduct, and the steel pipe front-end surface is provided with the forward screw thread; Inboard one end of big nut is provided with the forward screw thread, and opposite side is provided with reverse screw thread; The cross section of intermediate plate is wedge shape.
During use, the effective big nut of upper and lower sleeve is assembled into integral body, be enclosed within on the pre-buried sebific duct, setting of casing is pushed into anchor recess, withstand on the anchor recess end face, between last sleeve pipe horn mouth and sebific duct, insert intermediate plate and wedging, the rotation big nut, effect by positive and negative screw thread makes sleeve pipe outwards mobile, makes it tensioning by intermediate plate drive sebific duct and fixes.
For the ease of the rotation big nut, have four circular holes in the side of big nut, in circular hole, insert reinforcing bar and just can rotate big nut.
The present invention has following beneficial effect:
(1) novel, initiative has designed the pre-buried sebific duct of post-tensioned prestressing bridge end fastening devices, has solved a post-tensioned prestressing bridge prestress reinforcing bar duct Forming Quality control difficult problem.
(2) design is ingenious, has adopted the method for placing the wedge type intermediate plate between last sleeve pipe horn mouth and sebific duct, has both solved the problem that clamps sebific duct, again the unlikely sebific duct surface damage that causes; By turn big nut and the positive and negative screw thread method between sleeve pipe up and down, make sleeve pipe drive the sebific duct tensioning, reached the fixed effect of expection.
(3) use this device after, can make the indeformable displacement when concreting of pre-buried sebific duct, the moulding duct is straight, has guaranteed that the duct frictional resistance adheres to specification, and has improved the prestressed stretch-draw quality.
(4) use this device after because pre-buried sebific duct does not produce distortion displacement when concreting, the difficulty when also having reduced to extract sebific duct has been accelerated the tube drawing progress, has improved operating efficiency.
(5) simple in structure, make easily, load and unload easyly, cost is lower.
Description of drawings
Fig. 1 makes up structural representation after the installation for the present invention.
Fig. 2 is last sleeve pipe.
Fig. 3 is setting of casing.
Fig. 4 is big nut.
Fig. 5 is the lateral view of Fig. 5.
Fig. 6 is intermediate plate.
Among the figure, the last sleeve pipe of 1-, 2-setting of casing, 3-big nut, 4-intermediate plate, 5-circular hole, 6-sebific duct, 7-anchor recess.
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing.
The pre-buried sebific duct of a kind of post-tensioned prestressing bridge of the present invention end fastening devices, comprise sleeve pipe 1, setting of casing 2, big nut 3 and intermediate plate 4, the Lower Half of last sleeve pipe 1 is a steel pipe, pipe diameter is slightly larger than pre-buried sebific duct external diameter, the first half is an oviduct, the horn mouth diameter is according to the design of self-locking angle needs, and the steel pipe front-end surface is provided with reverse screw thread; The first half of setting of casing 2 is a steel pipe, and pipe diameter is identical with last sleeve pipe 1 pipe diameter, and Lower Half is an oviduct, and the horn mouth diameter is greater than Circularhole diameter on the anchor recess, in order to be supported on the anchor recess bottom surface, the steel pipe front-end surface is provided with the forward screw thread; Inboard one end of big nut 2 is provided with the forward screw thread, and opposite side is provided with reverse screw thread; Big nut 3 is steel component, and the processing of screw thread is to match with sleeve pipe male thread up and down in it.The cross section of intermediate plate 4 is wedge shape, is steel component, and the gap between size and last sleeve pipe horn mouth and the sebific duct external diameter adapts, and uses for convenient, can be designed as two lobes.
The side of big nut 3 has four circular holes 5.Four circular holes 5 are used for inserting reinforcing bar rotation big nut 3, by big nut 3 up and down sleeve pipe be assembled into integral body.
During use, two fastening devicess are a cover, are used for the two ends of a sebific duct 6, earlier the effective big nut 3 of upper and lower sleeve are assembled into integral body, are enclosed within on the pre-buried sebific duct 6, and assembly is pushed in the anchor recess, withstand on anchor recess 7 end faces, and every 6 one of sebific duct is installed one.Between last sleeve pipe 1 horn mouth and sebific duct, insert intermediate plate 4, and wedging.Insert reinforcing bar to inner rotary big nut 3 in big nut 3 circular holes, the effect by positive and negative screw thread makes sleeve pipe 1 outwards mobile, makes it tensioning by intermediate plate 4 drive sebific ducts 6 and fixes.
Claims (2)
1. the pre-buried sebific duct of post-tensioned prestressing bridge end fastening devices, it is characterized in that: comprise sleeve pipe (1), setting of casing (2), big nut (3) and intermediate plate (4), the Lower Half of last sleeve pipe (1) is a steel pipe, the first half is an oviduct, and the steel pipe front-end surface is provided with reverse screw thread; The first half of setting of casing (2) is a steel pipe, and Lower Half is an oviduct, and the steel pipe front-end surface is provided with the forward screw thread; Last sleeve pipe (1) and setting of casing (2) are by big nut (3) assembling, be enclosed within on the pre-buried sebific duct, inboard one end of big nut (3) is provided with the forward screw thread that is connected with setting of casing (2) front-end surface, and opposite side is provided with last sleeve pipe (1) front-end surface and is connected reverse screw thread; Insert intermediate plate (4) between last sleeve pipe (1) oviduct and sebific duct, the cross section of intermediate plate (4) is wedge shape.
2. the pre-buried sebific duct of a kind of post-tensioned prestressing bridge according to claim 1 end fastening devices, it is characterized in that: the side of big nut (3) has four circular holes (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110134417 CN102261041B (en) | 2011-05-24 | 2011-05-24 | End part fixing device of pre-buried rubber tube of post-tensioned prestressed bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110134417 CN102261041B (en) | 2011-05-24 | 2011-05-24 | End part fixing device of pre-buried rubber tube of post-tensioned prestressed bridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102261041A CN102261041A (en) | 2011-11-30 |
| CN102261041B true CN102261041B (en) | 2013-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110134417 Active CN102261041B (en) | 2011-05-24 | 2011-05-24 | End part fixing device of pre-buried rubber tube of post-tensioned prestressed bridge |
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| CN (1) | CN102261041B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817315B (en) * | 2012-05-22 | 2015-04-08 | 北京交通大学 | Support flexible anchoring system |
| CN102995556B (en) * | 2012-12-04 | 2014-11-05 | 北京交通大学 | Support for straddle-type monorail traffic track beam |
| CN105889625B (en) * | 2016-04-13 | 2018-01-09 | 中国科学院武汉岩土力学研究所 | A kind of combined steel pipe relay well equipment and construction method for jacking construction |
Citations (6)
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|---|---|---|---|---|
| CN2739290Y (en) * | 2004-09-18 | 2005-11-09 | 柳州欧维姆机械股份有限公司 | Steel strand vertical prestress anchoring system |
| JP2007254975A (en) * | 2006-03-20 | 2007-10-04 | Dps Bridge Works Co Ltd | Composite girder of steel and concrete, and method of manufacturing the composite girder |
| JP2008231700A (en) * | 2007-03-16 | 2008-10-02 | Anderson Technology Kk | Flat anchorage device for post-tensioned type prestressed concrete floor slab, post-tensioned type prestressed concrete floor slab using the anchorage device, and construction method for the post-tensioned type prestressed concrete floor slab |
| CN101736701A (en) * | 2009-12-15 | 2010-06-16 | 中交路桥华北工程有限公司 | Bridge steel and concrete mixing section constructing method |
| CN201704628U (en) * | 2010-03-16 | 2011-01-12 | 中国建筑土木建设有限公司 | Girder-end anchor recess plugging formwork for box girder |
| CN202073042U (en) * | 2011-05-24 | 2011-12-14 | 中铁三局集团有限公司 | End fixing device of pre-embedded hose of post-tensioning pre-stressed bridge |
-
2011
- 2011-05-24 CN CN 201110134417 patent/CN102261041B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2739290Y (en) * | 2004-09-18 | 2005-11-09 | 柳州欧维姆机械股份有限公司 | Steel strand vertical prestress anchoring system |
| JP2007254975A (en) * | 2006-03-20 | 2007-10-04 | Dps Bridge Works Co Ltd | Composite girder of steel and concrete, and method of manufacturing the composite girder |
| JP2008231700A (en) * | 2007-03-16 | 2008-10-02 | Anderson Technology Kk | Flat anchorage device for post-tensioned type prestressed concrete floor slab, post-tensioned type prestressed concrete floor slab using the anchorage device, and construction method for the post-tensioned type prestressed concrete floor slab |
| CN101736701A (en) * | 2009-12-15 | 2010-06-16 | 中交路桥华北工程有限公司 | Bridge steel and concrete mixing section constructing method |
| CN201704628U (en) * | 2010-03-16 | 2011-01-12 | 中国建筑土木建设有限公司 | Girder-end anchor recess plugging formwork for box girder |
| CN202073042U (en) * | 2011-05-24 | 2011-12-14 | 中铁三局集团有限公司 | End fixing device of pre-embedded hose of post-tensioning pre-stressed bridge |
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| CN102261041A (en) | 2011-11-30 |
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