CN103758021A - Prefabricated box beam for tensioning transverse prestress - Google Patents
Prefabricated box beam for tensioning transverse prestress Download PDFInfo
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- CN103758021A CN103758021A CN201310746822.XA CN201310746822A CN103758021A CN 103758021 A CN103758021 A CN 103758021A CN 201310746822 A CN201310746822 A CN 201310746822A CN 103758021 A CN103758021 A CN 103758021A
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- prefabricated
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- transverse prestress
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Abstract
A prefabricated box beam for tensioning transverse prestress comprises a top plate, a bottom plate and ventral plates; the ventral plates are arranged between the top plate and the bottom plate; an empty chamber is formed between the top plate, the bottom plate and the ventral plates; a row of lower through holes which are communicated with the empty chamber are correspondingly formed in the lower portions of the two ventral plates which are perpendicular to the transverse direction; the sections of the lower through holes are in rounded shapes, oval shapes or rectangular shapes. The prefabricated box beam for tensioning the transverse prestress has the advantages of providing convenience for transverse integrality of a plate girder bridge, prolonging the service life of the bridge, saving invests and not needing to interrupt traffic when the size of the transverse prestress is required to adjust or high intensity prestress reinforcing bars or steel strands are required to be replaced during the utilization process of the bridge.
Description
Technical field
The invention belongs to technical field of bridge construction, relate in particular to a kind of prefabricated case beam for stretch-draw transverse prestress.
Background technology
At present, the precast assembly case beam of bridge connects by hinge seam, and the construction quality of narrow and small and dark hinge seam can not be guaranteed, and between hinge seam concrete and precast beam concrete being connected of new-old concrete be plane of weakness.Under vehicular load (particularly overloaded vehicle) acts on, hinge seam is cracking easily, and then rainwater infiltration, accelerates the destruction of hinge seam.The hinge seam destroying easily causes " veneer is stressed ", thereby ruptures at Vehicle Load nowel beam.Existing reinforcing technique is along case beam base plate soffit stretch-draw transverse prestress, guarantee that each box girder integral is stressed, this reinforcement means exposes presstressed reinforcing steel, impact sight, and may invade the headroom of below road, also have and when maintenance, cut bridge deck or slot at bridge deck, installation transverse prestress muscle, this method has increased difficulty of construction, and construction time need be interrupted road traffic.
Summary of the invention
The present invention, in order to solve weak point of the prior art, increases the transverse integral of plate girder bridge, and a kind of prefabricated case beam for stretch-draw transverse prestress of being convenient to prestressed reinforcement of tensioning or twisted wire is provided.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: for the prefabricated case beam of stretch-draw transverse prestress, comprise top board, base plate and web, web is between top board and base plate, between top board, base plate and web, there is cavity, the bottom of the two block webs vertical with horizontal direction is corresponding is provided with the lower through-hole that a row is all communicated with cavity, and the section configuration of lower through-hole is circular, ellipse or rectangle.
The corresponding upper through hole of a row that is provided with in top of the described two block webs vertical with horizontal direction, the section configuration of upper through hole is circle, ellipse or rectangle.
The wherein external surface of a web vertical with horizontal direction is provided with and is positioned at lower through-hole external port low groove around, and low groove is outer imperial palace minor structure.
The wherein external surface of a web vertical with horizontal direction is provided with and is positioned at upper through hole external port upper groove around, and upper groove is outer imperial palace minor structure.
Described top board, base plate and web are by the reinforced concrete prefabricated integrative-structure forming.
Between lower through-hole between described two blocks of webs, be provided with lower guide pipe, lower guide pipe is installed or the beam prefabricated rear bonding installation of case when case is beam prefabricated.
Between upper through hole between described two blocks of webs, be provided with guide pipe, upper guide pipe is installed or the beam prefabricated rear bonding installation of case when case is beam prefabricated.
Adopt technique scheme, the present invention, for newly-designed bridge, when assembled prefabricated case beam, penetrates high strength wire or steel strand in the through hole of each prefabricated case beam.Guide pipe is made by pvc pipe material or high-strength tubing, and because steel strand have flexibility when not having stretch-draw, guide pipe plays the effect of being convenient to wear steel strand.Guide pipe in adjacent two prefabricated case beams adopts sleeve pipe to connect.After assembled the completing of prefabricated case beam of full-bridge, the gap cast hinge seam concrete by between adjacent two prefabricated case beams, reaches after design strength until its intensity, and high strength wire or the steel strand of stretch-draw series connection, form transverse prestress.Groove be provided for hidden mounting nuts or ground tackle, nut or ground tackle are not weathered and get rusty.Nut is used for fixedly reinforcing bar, and ground tackle is used for fixedly steel strand.
To existing assembled plate girder bridge, be to increase structural integrity, can be on some cross sections longitudinally, along bridge laterally in the punching of web upper and lower, penetrate high strength wire or steel strand, stretch-draw high strength wire or steel strand form transverse prestress.
The present invention facilitates for improving the transverse integral of plate girder bridge, extends bridge service life, saves investment.If plate girder bridge in use needs adjust the size of transverse prestress or change high strength wire or steel strand, also needn't suspend traffic.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention one;
Fig. 2 is the structural representation of the embodiment of the present invention two;
Fig. 3 is the structural representation of the embodiment of the present invention three;
Fig. 4 is the structural representation of the embodiment of the present invention four;
Fig. 5 is the structural representation of the embodiment of the present invention five;
Fig. 6 is the structural representation of the embodiment of the present invention six.
The specific embodiment
Embodiment mono-, as shown in Figure 1, prefabricated case beam for stretch-draw transverse prestress of the present invention, comprise top board 1, base plate 2 and web 3, web 3 is between top board 1 and base plate 2, between top board 1, base plate 2 and web 3, have the cavity 4 that is roughly rectangular shape, the bottom of the two block webs 3 vertical with horizontal direction is corresponding is provided with the lower through-hole 5 that a row is all communicated with cavity, and the section configuration of lower through-hole 5 is circular, ellipse or rectangle.Top board 1, base plate 2 and web 3 are by the reinforced concrete prefabricated integrative-structure forming.
Embodiment bis-, as shown in Figure 2, this embodiment is with the difference of embodiment mono-: the corresponding upper through hole 6 of a row that is provided with in top of the two block webs 3 vertical with horizontal direction, the section configuration of upper through hole 6 is circle, ellipse or rectangle, and upper through hole 6 is identical and corresponding one by one up and down with the number of lower through-hole 5.
Embodiment tri-, and as shown in Figure 3, this embodiment is with the difference of embodiment mono-: the wherein external surface of a web 3 vertical with horizontal direction is provided with and is positioned at lower through-hole 5 external port low groove 7 around, and low groove 7 is outer imperial palace minor structure.
Embodiment tetra-, as shown in Figure 4, this embodiment is with the difference of embodiment bis-: the wherein external surface of a web 3 vertical with horizontal direction is provided with and is positioned at lower through-hole 5 external port low groove 7 around, the wherein external surface of a web 3 vertical with horizontal direction is provided with and is positioned at upper through hole 6 external port upper groove 8 around, and upper groove 8 and low groove 7 are outer imperial palace minor structure.
Embodiment five, and as shown in Figure 5, the difference of this embodiment and embodiment mono-is: between the lower through-hole 5 between two blocks of webs 3, be provided with lower guide pipe 9, lower guide pipe 9 is installed or the beam prefabricated rear bonding installation of case when case is beam prefabricated.
Embodiment six, and as shown in Figure 6, the difference of this embodiment and embodiment bis-is: between the upper through hole 6 between two blocks of webs 3, be provided with guide pipe 10, upper guide pipe 10 is installed or the beam prefabricated rear bonding installation of case when case is beam prefabricated.
The present embodiment is not done any pro forma restriction to shape of the present invention, material, structure etc.; any simple modification, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment, all belong to the protection domain of technical solution of the present invention.
Claims (7)
1. for the prefabricated case beam of stretch-draw transverse prestress, comprise top board, base plate and web, web is between top board and base plate, between top board, base plate and web, there is cavity, it is characterized in that: the bottom of the two block webs vertical with horizontal direction is corresponding is provided with the lower through-hole that a row is all communicated with cavity, the section configuration of lower through-hole is circular, ellipse or rectangle.
2. the prefabricated case beam for stretch-draw transverse prestress according to claim 1, is characterized in that: the corresponding upper through hole of a row that is provided with in top of the described two block webs vertical with horizontal direction, the section configuration of upper through hole is circle, ellipse or rectangle.
3. the prefabricated case beam for stretch-draw transverse prestress according to claim 1, is characterized in that: the wherein external surface of a web vertical with horizontal direction is provided with and is positioned at lower through-hole external port low groove around, and low groove is outer imperial palace minor structure.
4. the prefabricated case beam for stretch-draw transverse prestress according to claim 2, is characterized in that: the wherein external surface of a web vertical with horizontal direction is provided with and is positioned at upper through hole external port upper groove around, and upper groove is outer imperial palace minor structure.
5. according to the prefabricated case beam for stretch-draw transverse prestress described in claim 1 or 2 or 3 or 4, it is characterized in that: described top board, base plate and web are by the reinforced concrete prefabricated integrative-structure forming.
6. the prefabricated case beam for stretch-draw transverse prestress according to claim 1, is characterized in that: between the lower through-hole between described two blocks of webs, be provided with lower guide pipe, lower guide pipe is installed or the beam prefabricated rear bonding installation of case when case is beam prefabricated.
7. the prefabricated case beam for stretch-draw transverse prestress according to claim 2, is characterized in that: between the upper through hole between described two blocks of webs, be provided with guide pipe, upper guide pipe is installed or the beam prefabricated rear bonding installation of case when case is beam prefabricated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310746822.XA CN103758021B (en) | 2013-12-31 | 2013-12-31 | For the prefabricated case beam of stretch-draw transverse prestress |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310746822.XA CN103758021B (en) | 2013-12-31 | 2013-12-31 | For the prefabricated case beam of stretch-draw transverse prestress |
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| CN103758021A true CN103758021A (en) | 2014-04-30 |
| CN103758021B CN103758021B (en) | 2016-01-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100063A (en) * | 2017-06-27 | 2017-08-29 | 扬州工业职业技术学院 | A kind of precast prestressed truss-like reinforcing bar concrete case |
| CN110747754A (en) * | 2019-10-30 | 2020-02-04 | 长安大学 | Shear-resisting reinforcing method for oblique section of wide hollow slab |
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| KR20040041313A (en) * | 2002-11-11 | 2004-05-17 | 노윤근 | Reinforcing appratus installed in inside extended region of prestressed concrete box of prestressed concrete box bridge and reinforcing method using the apparatus |
| JP2004218429A (en) * | 1998-02-12 | 2004-08-05 | Nippon Steel Corp | Bridge structure |
| CN102587267A (en) * | 2012-04-06 | 2012-07-18 | 浙江大学 | Tension-fabricated bridge with prestressed hollow-plate-girders and middle transverse partitions and construction method of tension-fabricated bridge with prestressed hollow-plate-girder and middle transverse partitions |
| CN202416148U (en) * | 2011-12-20 | 2012-09-05 | 浙江省交通规划设计研究院 | Bridge structure of pre-stressed concrete hollow slabs |
| CN102953347A (en) * | 2012-12-04 | 2013-03-06 | 华汇工程设计集团股份有限公司 | Design internal stress analyzing method for hinged hollow plank girder bridge with reinforced transverse prestress |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004218429A (en) * | 1998-02-12 | 2004-08-05 | Nippon Steel Corp | Bridge structure |
| CN2379513Y (en) * | 1999-05-14 | 2000-05-24 | 柳州欧维姆建筑机械有限公司 | Protective sleeve of pulling cable |
| KR20040041313A (en) * | 2002-11-11 | 2004-05-17 | 노윤근 | Reinforcing appratus installed in inside extended region of prestressed concrete box of prestressed concrete box bridge and reinforcing method using the apparatus |
| CN202416148U (en) * | 2011-12-20 | 2012-09-05 | 浙江省交通规划设计研究院 | Bridge structure of pre-stressed concrete hollow slabs |
| CN102587267A (en) * | 2012-04-06 | 2012-07-18 | 浙江大学 | Tension-fabricated bridge with prestressed hollow-plate-girders and middle transverse partitions and construction method of tension-fabricated bridge with prestressed hollow-plate-girder and middle transverse partitions |
| CN102953347A (en) * | 2012-12-04 | 2013-03-06 | 华汇工程设计集团股份有限公司 | Design internal stress analyzing method for hinged hollow plank girder bridge with reinforced transverse prestress |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100063A (en) * | 2017-06-27 | 2017-08-29 | 扬州工业职业技术学院 | A kind of precast prestressed truss-like reinforcing bar concrete case |
| CN110747754A (en) * | 2019-10-30 | 2020-02-04 | 长安大学 | Shear-resisting reinforcing method for oblique section of wide hollow slab |
| CN110747754B (en) * | 2019-10-30 | 2020-12-22 | 长安大学 | Shear-resisting reinforcing method for oblique section of wide hollow slab |
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| Publication number | Publication date |
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| CN103758021B (en) | 2016-01-13 |
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Inventor after: Wei Jiandong Inventor after: Li Peng Inventor after: You Peng Inventor after: Han Yuewang Inventor after: Wang Xiaowei Inventor after: He Zhibin Inventor after: Zhang Xiaojun Inventor after: Wu Li Inventor after: Wang Ruishan Inventor after: Zhou Feng Inventor before: Wei Jiandong Inventor before: Wang Li |
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Effective date of registration: 20180529 Address after: 301800 Baoyuan street, No. 10 Kaiyuan Road, Baodi District, Tianjin Patentee after: Middle friendship three the second Engineering Co., Ltd of public office Address before: 450001 No. 100 science Avenue, Henan, Zhengzhou Patentee before: Zhengzhou University |
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