CN203238549U - External prestressed structure of bridge body - Google Patents
External prestressed structure of bridge body Download PDFInfo
- Publication number
- CN203238549U CN203238549U CN 201320170159 CN201320170159U CN203238549U CN 203238549 U CN203238549 U CN 203238549U CN 201320170159 CN201320170159 CN 201320170159 CN 201320170159 U CN201320170159 U CN 201320170159U CN 203238549 U CN203238549 U CN 203238549U
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- Prior art keywords
- prestressed strand
- bridge
- strand bundle
- prestressed
- bundle body
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Abstract
An external prestressed structure of a bridge body comprises multiple steering blocks horizontally arranged inside a bridge face plate, at least two prestressed steel bundle bodies penetrating through the steering blocks, and an anchoring device for fixing the prestressed steel bundle bodies; steering steel pipes corresponding to the prestressed steel bundle bodies are embedded in the multiple steering blocks, and penetrate through the steering blocks; the steering steel pipes on the same prestressed steel bundle body are positioned at the parabola with an inward opening; after penetrating the steering steel pipes, the prestressed steel bundle bodies are flatly bent in the plate face of the bridge face; and two ends of each prestressed steel bundle bodies are connected with the anchoring device and are respectively anchored at the end face of a main girder. As the prestressed steel bundle bodies are bent in the plate face of the bridge face, the external prestressed structure of the bridge body offsets the horizontal pull stress formed under the load action by utilizing the horizontal press stress part generated by the flat bending of the prestressed bundles, and the horizontal stressed performance of a bridge face plate is improved.
Description
Technical field
The utility model belongs to field of engineering technology, relates to the outer prestressed structure of a kind of bridge.
Background technology
At present, applying the transverse structure in the bridge construction is the two ends that directly prestressed strand laterally are anchored at bridge deck, the horizontal tensile stress that the compressive stress partial offset that utilizes prestressing tendon to prestore forms under load action.But have in the structure of web or frange plate at case beam and current track traffic trough girder commonly used etc., because the existence of web or frange plate has occupied the anchoring space of common transverse prestress, bring very large inconvenience for the replacing of construction, design and later stage prestressed strand, and the stretch-draw meeting is significantly dwindled the sphere of action of transverse prestress in casing.Although existing prestressing with bond technology can solve the transverse prestress problem of case beam and trough girder, the prestressing with bond technology has that the steel bundle is non-exchange, the shortcoming such as stretch-draw again.
The utility model content
The purpose of this utility model is to provide a kind of bridge external prestressing structure, and this external prestressing structure can not only provide required transverse prestress by vertical stretch-draw, and easy construction, replaceable steel bundle, again stretch-draw.
For achieving the above object, solution of the present utility model is:
A kind of bridge external prestressing structure, comprise that polylith is horizontally set at the steering block of bridge deck inboard, article at least two, pass the prestressed strand bundle body of described steering block and the anchor device of fixing described prestressed strand bundle body, the embedding steel pipe that turns to of corresponding described prestressed strand bundle body respectively in the described polylith steering block, the described steel pipe that turns to connects described steering block, the steel pipe that turns on the described same prestressed strand bundle body is positioned on the inside parabola of opening, described prestressed strand bundle body passes the described flat curved setting in the bridge deck face behind the steel pipe that turns to, the two ends of described prestressed strand bundle body are connected with described anchor device, and the two ends of prestressed strand bundle body are anchored in respectively the girder end face.
Described bridge external prestressing structure, comprise two prestressed strand bundle bodies, the symmetrical bridge deck cross central line of described two prestressed strand bundle bodies arranges, be the inside parabolic structure of integral finish, the described infall that turns to steel pipe to be arranged at the described steering block of described prestressed strand Shu Tiyu.
Described prestressed strand bundle body comprises prestressed strand, pipeline and grouting agent, and described prestressed strand is arranged among the described pipeline, and described grouting agent is filled the gap between described pipeline and the described prestressed strand.
Further, described pipeline comprises HDPE(High Density Polyethylene, high density polyethylene (HDPE)) pipe and two kinds of steel pipes, the pipe section of the described section of turning to and anchoring section is steel pipe, remainder is that HDPE manages.
Described anchor device comprises neck bush, ground tackle and grouting agent, and described ground tackle is positioned at neck bush inside, and ground tackle directly contacts with neck bush, fills grouting agent between the two.
Described grouting agent is cement paste.
Described steering block is the concrete structure steering block.
Turning to steel pipe is the spindle-type structure, turns to the enlarging setting of steel pipe two ends.
Described bridge external prestressing structure also comprises a plurality of damping devices, and described vibration absorber is installed on the HDPE pipeline section of described prestressed strand bundle body.
Described damping device comprises cord clip, vibration-absorptive material and support three parts, described cord clip clamps the HDPE pipe of described prestressed strand bundle body, vibration-absorptive material is filled the gap between described cord clip and the HDPE pipe, is connected via support welding between described damping device and the beam body.
Because adopt such scheme, the beneficial effects of the utility model are:
1, prestressed strand bundle body is flat curved in the bridge deck face, the horizontal tensile stress that the transverse compressive stress partial offset that utilizes prestressed strand to put down curved generation forms under load action, thus improve the lateral stressed performance of bridge deck;
2, two ends turn to steel pipe with the spindle-type of enlarging, can adapt to the position error of adjacent transfer;
3, the double-skin duct at prestressed strand Shu Tiyu anchor structure place makes mutually isolation between external prestressing steel bundle and ground tackle and the concrete structure, and is replaceable to guarantee external prestressing steel bundle;
4, damping device is fixed together prestressed strand and beam body, by changing the drift of prestressed strand, avoids beam, Suo Gongzhen.
Description of drawings
Fig. 1 is the plan view of the utility model one embodiment;
Fig. 2 is the enlarged drawing that turns to steel tubular structure in embodiment illustrated in fig. 1;
Fig. 3 is the span centre elevation of raising middle flask beam embodiment embodiment illustrated in fig. 1;
Fig. 4 is the end bay end elevational view of raising middle flask beam embodiment embodiment illustrated in fig. 1;
Wherein: bridge deck 1, steering block 2, prestressed strand bundle body 3, anchor device 4, turn to steel pipe 5, damping device 6, girder end face 7.
The specific embodiment
Below in conjunction with the accompanying drawing illustrated embodiment the utility model is further described.
As shown in Figure 1, a kind of bridge external prestressing structure, comprise that polylith is horizontally set at the steering block 2 of bridge deck 1 inboard, article at least two, pass the prestressed strand bundle body 3 of steering block 2 and the fixing anchor device 4 of prestressed strand bundle body 3, the polylith steering block 2 interior respectively corresponding prestressed strand bundle body 3 embedding steel pipes 5 that turn to, turn to steel pipe 5 to connect steering block 2, prestressed strand bundle body 3 passes and turns to behind the steel pipe 5 flat curved setting in 1 of bridge deck, the two ends of prestressed strand bundle body 3 are connected with anchor device 4, and girder end face 7 is fixed at the two ends of prestressed strand bundle body 3 respectively anchoring.
In the embodiment shown in fig. 1, steering block 2 is the concrete structure steering block, three block concrete structure steering blocks 2 are arranged at respectively bridge deck 1 inboard vertically spanning three branch places, the bridge external prestressing structure arranges two prestressed strand bundle bodies 3 altogether, is provided with two in the corresponding every steering block 2 and turns to steel pipe 5.In the present embodiment, turn to steel pipe 5 to connect steering block 2, for passing steering block 2, prestressed strand bundle body 3 provides passage, same prestressed strand bundle body 3 passes and turns to steel pipe 5 all to be positioned on the opening parabola inwards, is the inside parabolic structure of opening so that original straight prestressed strand bundle body 3 passes steering block 2 rear integral body.Article two, the symmetrical bridge deck cross central line of prestressed strand bundle body arranges, the flat curved of prestressed strand bundle body 3 turning to steel pipe 5 places to produce a lateral pull of laterally concentrating the precompression partial offset to form under load action, thereby improves bridge deck 1 lateral stressed performance.
As shown in Figure 2, turn to steel pipe 5 to be the spindle-type structure, spindle-type turns to the steel pipe two ends with enlarging, can adapt to the position error of adjacent transfer.During Specific construction, in advance at the embedding steel pipe 5 that turns in prestressed strand bundle body 3 places of passing, prestressed strand bundle body 3 directly contacts with turning to steel pipe 5 at the steering structure place, mutually isolates with concrete structure before building.
The two ends of prestressed strand bundle body 3 are connected with anchor device 4, are anchored on the girder end face 7 by anchor device 4.Prestressed strand bundle body 3 comprises that prestressed strand, pipeline and grouting agent are cement paste, and prestressed strand is arranged among the pipeline, the gap between grouting agent fill pipe and the prestressed strand.
Because the two ends of prestressed strand bundle body 3 and anchor device 4 double-skin ducts structure make external prestressing steel bundle and ground tackle all and mutually isolation between the concrete structure, thereby assurance external prestressing steel bundle is replaceable and again stretch-draw.
In the present embodiment, the pipeline of prestressed strand bundle body 3 is divided into HDPE(High Density Polyethylene, high density polyethylene (HDPE)) pipe and two kinds of steel pipes, the pipe section of the section of turning to and anchoring section is steel pipe, remainder is that HDPE manages.
In the present embodiment, the bridge external prestressing structure also comprises a plurality of damping devices 6, and vibration absorber is installed on the HDPE pipeline section of prestressed strand bundle body 3.Damping device 6 comprises cord clip, vibration-absorptive material and support three parts, and cord clip clamps the HDPE pipe of prestressed strand bundle body 3, and vibration-absorptive material is filled the gap between cord clip and the HDPE pipe, is connected via support welding between damping device 6 and the beam body.At prestressed strand bundle body 3 straightways vibration absorber 6 is set, damping device 6 is fixed together prestressed strand bundle body 3 and bridge deck 1, by changing the drift of prestressed strand bundle body 3, avoids beam, Suo Gongzhen.
The above-mentioned description to embodiment is can understand and use the utility model for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the utility model is not limited to above-described embodiment, and those skilled in the art are according to announcement of the present utility model, and not breaking away from the improvement that the utility model category makes and revise all should be within protection domain of the present utility model.
Claims (10)
1. bridge external prestressing structure, comprise that polylith is horizontally set at the steering block of bridge deck inboard, article at least two, pass the prestressed strand bundle body of described steering block and the anchor device of fixing described prestressed strand bundle body, it is characterized in that: the embedding steel pipe that turns to of corresponding described prestressed strand bundle body respectively in the described polylith steering block, the described steel pipe that turns to connects described steering block, the steel pipe that turns on the described same prestressed strand bundle body is positioned on the inside parabola of opening, described prestressed strand bundle body passes the described flat curved setting in the bridge deck face behind the steel pipe that turns to, the two ends of described prestressed strand bundle body are connected with described anchor device, and the two ends of prestressed strand bundle body are anchored in respectively the girder end face.
2. bridge external prestressing structure according to claim 1, it is characterized in that: comprise two prestressed strand bundle bodies, the symmetrical bridge deck cross central line of described two prestressed strand bundle bodies arranges, be the inside parabolic structure of integral finish, the described infall that turns to steel pipe to be arranged at the described steering block of described prestressed strand Shu Tiyu.
3. bridge external prestressing structure according to claim 1, it is characterized in that: prestressed strand bundle body comprises prestressed strand, pipeline and grouting agent, described prestressed strand is arranged among the described pipeline, and described grouting agent is filled the gap between described pipeline and the described prestressed strand.
4. bridge external prestressing structure according to claim 2 is characterized in that: described pipeline comprises two kinds of HDPE pipe and steel pipes, and the pipe section of the described section of turning to and anchoring section is steel pipe, and remainder is that HDPE manages.
5. bridge external prestressing structure according to claim 1, it is characterized in that: described anchor device comprises neck bush, ground tackle and grouting agent, and described ground tackle is positioned at neck bush inside, and ground tackle directly contacts with neck bush, fills grouting agent between the two.
6. according to claim 2 or 5 described bridge external prestressing structures, it is characterized in that: described grouting agent is cement paste.
7. bridge external prestressing structure according to claim 1, it is characterized in that: described steering block is the concrete structure steering block.
8. bridge external prestressing structure according to claim 1, it is characterized in that: turning to steel pipe is the spindle-type structure, turns to the enlarging setting of steel pipe two ends.
9. bridge external prestressing structure according to claim 1, it is characterized in that: also comprise a plurality of damping devices, described vibration absorber is installed on the HDPE pipeline section of described prestressed strand bundle body.
10. bridge external prestressing structure according to claim 9, it is characterized in that: described damping device comprises cord clip, vibration-absorptive material and support three parts, described cord clip clamps the HDPE pipe of described prestressed strand bundle body, vibration-absorptive material is filled the gap between described cord clip and the HDPE pipe, is connected via support welding between described damping device and the beam body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320170159 CN203238549U (en) | 2013-04-08 | 2013-04-08 | External prestressed structure of bridge body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320170159 CN203238549U (en) | 2013-04-08 | 2013-04-08 | External prestressed structure of bridge body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203238549U true CN203238549U (en) | 2013-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320170159 Expired - Fee Related CN203238549U (en) | 2013-04-08 | 2013-04-08 | External prestressed structure of bridge body |
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| CN (1) | CN203238549U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105755961A (en) * | 2016-03-14 | 2016-07-13 | 沈阳建筑大学 | Method for preventing T-shaped bridge boundary beam from generating lateral bending and deformation |
| CN105755960A (en) * | 2016-03-14 | 2016-07-13 | 沈阳建筑大学 | Method for preventing middle beam of T-shaped beam bridge from generating lateral bending deformation |
| CN113931084A (en) * | 2021-10-08 | 2022-01-14 | 新疆交通建设集团股份有限公司 | Construction method for external prestress of steel-concrete composite beam |
-
2013
- 2013-04-08 CN CN 201320170159 patent/CN203238549U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105755961A (en) * | 2016-03-14 | 2016-07-13 | 沈阳建筑大学 | Method for preventing T-shaped bridge boundary beam from generating lateral bending and deformation |
| CN105755960A (en) * | 2016-03-14 | 2016-07-13 | 沈阳建筑大学 | Method for preventing middle beam of T-shaped beam bridge from generating lateral bending deformation |
| CN105755960B (en) * | 2016-03-14 | 2017-05-10 | 沈阳建筑大学 | Method for preventing middle beam of T-shaped beam bridge from generating lateral bending deformation |
| CN113931084A (en) * | 2021-10-08 | 2022-01-14 | 新疆交通建设集团股份有限公司 | Construction method for external prestress of steel-concrete composite beam |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20160408 |
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| CF01 | Termination of patent right due to non-payment of annual fee |