CN1088136C - Concrete box beam vertically locked by prestressed flat bolt and its production methed - Google Patents
Concrete box beam vertically locked by prestressed flat bolt and its production methed Download PDFInfo
- Publication number
- CN1088136C CN1088136C CN 97109128 CN97109128A CN1088136C CN 1088136 C CN1088136 C CN 1088136C CN 97109128 CN97109128 CN 97109128 CN 97109128 A CN97109128 A CN 97109128A CN 1088136 C CN1088136 C CN 1088136C
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- concrete
- flat anchor
- anchoring
- prestressed
- box beam
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Abstract
The present invention belongs to a box beam used for bridges and a manufacturing method thereof, which mainly solves the defects existing in the existing box beam that manufacturing technique is complicated, and the shearing resistance performance of a beam end is poor. The box beam is characterized in that a prestressing flat anchor is vertically anchored in a web plate. The present invention has the manufacturing method of A. casting bottom plate concrete, B. placing an inner shuttering; C. casting the web plate and top plate concrete and pre-burying a corrugated pipe; D. bundling pre-stress steel hinging wires so as to penetrate the corrugated pipe, and anchoring the prestressing flat anchor in the web plate and a bottom plate, E. stretching the pre-stress wire steel hinging wire beam, grouting and withdrawing the inner shuttering so as to be made into the box beam of the present invention. The present invention is also suitable for box shaping plates made of prestressed concrete.
Description
The invention belongs to a kind of medium and small concrete box girder and manufacture method thereof of striding the footpath bridge that be used for.
At the medium and small medium-term and long-term pretensioning prestressed concrete hollowcore slab that adopts routine of footpath bridge construction of striding, its deficiency has mill worker's consumption bigger than normal, can not give full play to the mechanical characteristic of use prestressing steel etc.; For this reason, people have proposed utilizing prestressing force post tensioning method concrete box template and utilizing prestressing force post tensioning method concrete box girder again, though can improve medium and small design and construction of striding the footpath bridge, improve lateral stability and a large amount of raw material of saving, but owing to be that employing garden shape ground tackle cuts with scissors wire harness with prestress steel and is anchored in the web, need the thickness of thickening web, make pre-stressed box template or case beam have following deficiency: 1 because the thickening web, make bridge construction vertically can not adopt the uniform section pattern, cause construction inconvenience, the precast beam production technology is complicated; When 2, prestressed flat anchor level was anchored at base plate, then structure had only the vertical equity prestressing tendon, and the beam-ends shear behavior is poor.
The purpose of this invention is to provide and a kind ofly need not thicken web and can improve the beam-ends shear behavior and reduce the concrete box girder and the manufacture method thereof of the prestressed flat anchor vertical anchoring of processing link.
Case beam of the present invention is made up of the sealing box that the top board, two webs and the base plate that adopt concrete, prestress wire, bellows, reinforcing bar to be prefabricated into constitute.
Case beam of the present invention is achieved in that also vertical anchoring has the prestressed flat anchor in two webs.
The pipe shaft of above-mentioned bellows is that garden cylindricality, pipe end are that flat mouthful and flat mouthful two ends are the garden arc.
The manufacture method of beam of the present invention is:
A, pouring box beam underplate concrete,
B, placing box beam inner formword,
C, cast web and concrete roof, and pre-buried bellows,
D, prestress wire bunchy also penetrate in the bellows, and the prestressed flat anchor in the web is the vertical anchoring, and the prestressed flat anchor in the base plate is horizontal anchoring,
E, reach the 80% post tensioning prestress steel twist wire harness and the grouting of type design intensity, before concrete final set, extract inner formword out and promptly make case beam of the present invention at concrete strength.
Because case beam of the present invention need not thickeied web, make box-beam structure vertically can adopt the uniform section pattern, therefore, inner formword can adopt the steel-made internal mould plate to take out and dial moulding, thereby reduced processing link, simplified production technology, and the prestress steel twist wire harness after bending up, has improved beam-ends the shear behavior of beam-ends.
The present invention also is applicable to the prestressed concrete box template.
Fig. 1 is a box-beam structure schematic diagram of the present invention.
Fig. 2 and Fig. 3 are respectively A-A and B-B schematic diagram.
Fig. 4 is the bellows structure schematic diagram.
Fig. 5 and Fig. 6 are respectively C-C and B-B schematic diagram.
Among the figure: 1-prestress wire, 2-bellows, 3-prestressed flat anchor, 4-top board, 5-web, 6-base plate.
Further specify embodiment below in conjunction with accompanying drawing:
Totally 20 of prestress wires 1, per 5 a branch of, wherein garden shape 2 bundle, flat 2 bundles, totally 4 of bellowss 2, totally 8 on prestressed flat anchor, wherein each 1 at two ends, each 2 at the two ends of base plate 6 of two webs 5, the length and width of top board 4 are thick to be 20 * 1.5 * 0.14 (m), web 5 to grow tall thick be 20 * 0.9 * 0.14 (m), the length and width of base plate 6 are thick to be 20 * 1.5 * 0.12 (m), and inner formword is a steel, adopts aforementioned manufacture method promptly to make case beam of the present invention.
Claims (3)
1, the concrete box girder of a kind of prestressed flat anchor vertical anchoring, form by the sealing box that the top board, two webs and the base plate that adopt concrete, prestress wire, bellows, reinforcing bar to be prefabricated into constitute, it is characterized in that also vertical anchoring has the prestressed flat anchor in two webs.
2, by the concrete box girder of the described a kind of prestressed flat anchor vertical of claim 1 anchoring, the pipe shaft that it is characterized in that said bellows is that garden cylindricality, pipe end are that the two ends of flat mouthful and flat mouthful are the garden arc.
3, the manufacture method of the concrete box girder of a kind of prestressed flat anchor vertical anchoring is characterized in that:
A, pouring box beam underplate concrete,
B, placing box beam inner formword,
C, cast web and concrete roof, and pre-buried bellows,
D, with the prestress wire bunchy and penetrate in the bellows, the prestressed flat anchor in the web is the vertical anchoring, the prestressed flat anchor in the base plate is horizontal anchoring;
E, reach the 80% post tensioning prestress steel twist wire harness and the grouting of type design intensity, before concrete final set, extract inner formword out and promptly make case beam of the present invention at concrete strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97109128 CN1088136C (en) | 1997-05-30 | 1997-05-30 | Concrete box beam vertically locked by prestressed flat bolt and its production methed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97109128 CN1088136C (en) | 1997-05-30 | 1997-05-30 | Concrete box beam vertically locked by prestressed flat bolt and its production methed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1168441A CN1168441A (en) | 1997-12-24 |
| CN1088136C true CN1088136C (en) | 2002-07-24 |
Family
ID=5170943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97109128 Expired - Fee Related CN1088136C (en) | 1997-05-30 | 1997-05-30 | Concrete box beam vertically locked by prestressed flat bolt and its production methed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1088136C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858123A (en) * | 2010-05-31 | 2010-10-13 | 白福波 | Prestressed concrete rigid frame cable beam |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128900C (en) * | 2001-10-26 | 2003-11-26 | 上海磁悬浮交通发展有限公司 | Prestressed rail beam and its manufacture |
| CN100348398C (en) * | 2004-03-29 | 2007-11-14 | 上海市城市建设设计研究院 | Precast segmental beam for overhead road box girder, and its manufacturing method and formed box girder |
| CN101210412B (en) * | 2006-12-31 | 2010-07-14 | 中铁工程设计咨询集团有限公司 | Simply supported box girder and its manufacturing method and prestressed reinforcing steel guiding device |
| CN101619596B (en) * | 2009-07-27 | 2010-12-08 | 林州建总建筑工程有限公司 | Method for preventing indoor swimming pool with concrete structure from being eroded by chlorine gas |
| CN104264574B (en) * | 2014-10-14 | 2016-04-13 | 重庆交通大学 | Mid and minor spans precast concrete beam bridge prestressing tendon structure and method to set up thereof |
| CN105484501A (en) * | 2015-12-31 | 2016-04-13 | 天津市大地海陆岩土工程技术开发有限公司 | Arc-shaped prestress steel strand stretching and drawing device |
| CN109594652B (en) * | 2019-01-11 | 2019-12-27 | 中国矿业大学 | Prestressed assembly frame structure for stretching and anchoring in column bracket |
| CN110788988A (en) * | 2019-09-30 | 2020-02-14 | 浙江交工集团股份有限公司 | Midspan bottom grouting method for precast beam |
| CN114059711A (en) * | 2021-11-10 | 2022-02-18 | 河南省建设工程施工图审查中心有限公司 | Assembled self-adaptation becomes load steel beam prestressing force device |
| CN115162510B (en) * | 2022-07-11 | 2024-06-21 | 中国矿业大学 | Pretensioned prestressed concrete frame beam and prefabricating method thereof |
| CN115142471B (en) * | 2022-07-29 | 2024-09-10 | 中铁一局集团建筑安装工程有限公司 | Light-weight assembled cable tunnel self-balancing top plate and method |
| CN115229971B (en) * | 2022-08-30 | 2023-05-26 | 北京城建设计发展集团股份有限公司 | Pretensioned prestressed concrete U-shaped beam adopting broken line reinforcement |
-
1997
- 1997-05-30 CN CN 97109128 patent/CN1088136C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858123A (en) * | 2010-05-31 | 2010-10-13 | 白福波 | Prestressed concrete rigid frame cable beam |
| CN101858123B (en) * | 2010-05-31 | 2011-12-28 | 白福波 | Prestressed concrete rigid frame cable beam elastic connecting to adjacent common beam |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1168441A (en) | 1997-12-24 |
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