CN2816118Y - Prefabricated beam connection structure - Google Patents
Prefabricated beam connection structure Download PDFInfo
- Publication number
- CN2816118Y CN2816118Y CN 200520042432 CN200520042432U CN2816118Y CN 2816118 Y CN2816118 Y CN 2816118Y CN 200520042432 CN200520042432 CN 200520042432 CN 200520042432 U CN200520042432 U CN 200520042432U CN 2816118 Y CN2816118 Y CN 2816118Y
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- CN
- China
- Prior art keywords
- precast beam
- linkage section
- syndeton
- sides
- concrete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a prefabricated beam connection structure which is characterized in that a connection section is cast on site along a bridge direction between the prefabricated beams on both sides; the upper opening of the connection section is narrow, and the lower opening is wide. The connection section has a structure that a ventral plate is provided with a saw-tooth gear block so as to improve the anti-shearing capability of new concrete and old concrete on the joint positions. With the technology, the reliability of the joint is strengthened to make a pre-stressed concrete connecting beam with a large span integrally installed so as to ensure the safety of a simple supporting system converted into a continuous system structure and to accelerate the construction speed of continue beams, and particularly, the speed of construction period of the multiple-span and multiple-section continuous beams is more fast than that of the construction methods in other forms.
Description
Technical field:
The utility model relates to bridge civil engineering field, specifically a kind of precast beam syndeton that the simply supported beam system is converted to the continuous beam system on the bridge pier top.
Background technology:
At present, the beam structure that Jiang Qiaoliang adopts the cantilever pouring construction more is striden in domestic construction, and (l 〉=60m) freely-supported sets up, and the Dun Ding place adopts the wet joint concrete to connect into the design and construction example of continuous beam also not utilize large-scale precast beam.For the engineering of extensive construction, the shortcoming of cantilever pouring is that the construction acting surface is little, and construction speed is slow.
Summary of the invention:
The purpose of this utility model is to provide a kind of novel precast beam syndeton, can convert the simply supported beam system to the continuous beam system on the bridge pier top.
To achieve these goals, the technical solution of the utility model is: a kind of precast beam syndeton comprises the precast beam that is arranged on both sides, bridge pier top, it is characterized in that suitable bridge is to cast-in-place linkage section between the precast beam of both sides, this linkage section is suitable for reading narrow, and end opening is wide, and this linkage section is the serrated teeth bulk.
The concrete size of linkage section determines that according to bridge span footpath size bottom width is preferably 1～2m, and top width is preferably 0.5～1.0m, and bottom width is preferably 1.5～2.5 with the top width ratio.
For increasing the shearing resistance effect, this linkage section is made the serrated teeth bulk, and promptly linkage section is stepped being projected as of facade.
Also be provided with the vertical connection steel bundle that runs through both sides precast beam and middle linkage section in this precast beam syndeton, this vertically connects the steel bundle and is anchored in respectively in the precast beam of both sides.Also can be equipped with vertical steel bundle and horizontal steel bundle, to strengthen being connected of precast beam and linkage section.
In the precast beam end anchor plate is arranged, around anchor plate, be provided with vertical connection stiffener to linkage section direction one side.This can increase with concrete bond stress and strengthen junction New-old concrete cracking resistance.
The employing of this technology, strengthened the reliability of joint, make and stride footpath prestressed concrete tie-beam integral installation greatly, the safety that system of simple supporting converts the continuous system structure to has had assurance, the construction period of having accelerated the speed of Construction of continuous beam, particularly multispan, multi-joint continuous beam is more faster than the job practices of other form.
Description of drawings:
Fig. 1 is the linkage section elevation according to the utility model first embodiment
Fig. 2 is the linkage section plan view of first embodiment
Fig. 3 is that the linkage section of first embodiment connects reinforcement figure
Fig. 4 is the linkage section elevation according to the utility model second embodiment
Fig. 5 is the linkage section plan view of second embodiment
Fig. 6 is that the linkage section of second embodiment connects reinforcement figure
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in detail.
A kind of precast beam syndeton comprises the precast beam 1 that is arranged on both sides, bridge pier top, it is characterized in that suitable bridge is to cast-in-place linkage section 2 between the precast beam of both sides, and this linkage section 2 is suitable for reading narrow, and end opening is wide.The concrete size of linkage section determines that according to bridge span footpath size end opening bottom width b is preferably 1～2m, and top width a suitable for reading is preferably 0.5～1.0m, and bottom width is preferably 1.5～2.5 with the top width ratio.For increasing the shearing resistance effect, this linkage section is the serrated teeth bulk, and promptly precast beam end web 3 is stepped being projected as of facade, and then cast-in-place linkage section 2 just becomes stepped in the projection of facade.The top width height is more than or equal to the bottom width height, and the sawtooth slope of precast beam web 3 is 0.5～2.0.When construction, earlier the prefabricated simply supported beam of single span is set up on the temporary support of bridge pier top, build the wet joint concrete at the Dun Ding place, convert the prefabricated simply supported beam connection in adjacent two holes to beam structure, add vertically in joint area, transverse prestress and web add vertical prestressing, with jam-packed linkage section concrete, make it to combine as a whole with contiguous prefabricated beam.In the prestressing force measure, adopt three dimension prestressing, on top board and base plate, add vertically, transverse prestress, in crossbeam, add transverse prestress and web adds vertical prestressing, can strengthen being connected of adjacent precast beam and cast-in-place section concrete.
Also be provided with the vertical connection steel bundle 4 that runs through both sides precast beam and middle linkage section in this precast beam syndeton, this vertically connects steel bundle 4 and is anchored in the both sides precast beam 2.Also can be equipped with vertical bundle 5 and transverse beam (not shown), to strengthen being connected of precast beam 1 and linkage section 2.
In the precast beam end anchor plate is arranged, be provided with vertical connection stiffener 6 to linkage section direction one side around anchor plate, this can increase with concrete bond stress and strengthen junction New-old concrete cracking resistance.The connection that should vertically connect stiffener 6 can adopt earlier in precast beam embedded bar to weld or method such as mechanical connection again.
As can be seen from the figure, above-mentioned two embodiment in plane projection one be provided with zigzag, and another does not establish zigzag.Therefore, what the present invention emphasized is, the projection of linkage section on facade must be jagged, so that increase shear resistance, and whether its projection in the plane is jagged, then can come as the case may be calmly.
7 is top board among the figure, and 8 is base plate.
Claims (7)
1. a precast beam syndeton comprises the precast beam that is arranged on both sides, bridge pier top, it is characterized in that: suitable bridge is to cast-in-place linkage section between the precast beam of both sides, and this linkage section is suitable for reading narrow, and end opening is wide, and this linkage section is the serrated teeth bulk.
2. precast beam syndeton as claimed in claim 1 is characterized in that: the linkage section bottom width is 1～2m, and top width is 0.5～1.0m, and bottom width is 1.5～2.5 with the top width ratio.
3. precast beam syndeton as claimed in claim 1 is characterized in that: the top width height is not less than the bottom width height, and the sawtooth slope of precast beam web is 0.5～2.0.
4. precast beam syndeton as claimed in claim 3 is characterized in that: also be provided with the vertical connection steel bundle that runs through both sides precast beam and middle linkage section in this precast beam syndeton, this vertically connects the steel bundle and is anchored in the precast beam of both sides.
5. precast beam syndeton as claimed in claim 1 is characterized in that: there is anchor plate the precast beam end, is connected with vertical connection stiffener to linkage section direction one side around anchor plate.
6. precast beam syndeton as claimed in claim 5 is characterized in that: vertically connecting stiffener can have many, and many rebar spacings are 10～20cm.
7. precast beam syndeton as claimed in claim 5 is characterized in that: the diameter that vertically connects stiffener is Φ 25～Φ 28.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520042432 CN2816118Y (en) | 2005-06-13 | 2005-06-13 | Prefabricated beam connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520042432 CN2816118Y (en) | 2005-06-13 | 2005-06-13 | Prefabricated beam connection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2816118Y true CN2816118Y (en) | 2006-09-13 |
Family
ID=36995922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520042432 Expired - Fee Related CN2816118Y (en) | 2005-06-13 | 2005-06-13 | Prefabricated beam connection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2816118Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862597A (en) * | 2012-10-17 | 2016-08-17 | 上海市政工程设计研究总院（集团）有限公司 | Construction method for integrated structure of upper and lower parts of laminated composite beam bridge |
| CN109137720A (en) * | 2018-10-31 | 2019-01-04 | 浙江省交通规划设计研究院有限公司 | Prefabricated case beam and construction method |
| CN112049026A (en) * | 2020-09-02 | 2020-12-08 | 湖南大学 | Prefabricated beam section, high early strength UHPC wet joint and long-span beam bridge suspension splicing construction method thereof |
-
2005
- 2005-06-13 CN CN 200520042432 patent/CN2816118Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862597A (en) * | 2012-10-17 | 2016-08-17 | 上海市政工程设计研究总院（集团）有限公司 | Construction method for integrated structure of upper and lower parts of laminated composite beam bridge |
| CN105862597B (en) * | 2012-10-17 | 2017-11-24 | 上海市政工程设计研究总院（集团）有限公司 | A kind of multiple-piece composite beam bridge top and the bottom monolithic construction construction method |
| CN109137720A (en) * | 2018-10-31 | 2019-01-04 | 浙江省交通规划设计研究院有限公司 | Prefabricated case beam and construction method |
| CN109137720B (en) * | 2018-10-31 | 2020-02-07 | 浙江省交通规划设计研究院有限公司 | Construction method of prefabricated box girder |
| CN112049026A (en) * | 2020-09-02 | 2020-12-08 | 湖南大学 | Prefabricated beam section, high early strength UHPC wet joint and long-span beam bridge suspension splicing construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060913 Termination date: 20130613 |