CN204080652U - Pre-stressed bridge deflection adjusting device and pre-stressed bridge thereof - Google Patents
Pre-stressed bridge deflection adjusting device and pre-stressed bridge thereof Download PDFInfo
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- CN204080652U CN204080652U CN201420316083.0U CN201420316083U CN204080652U CN 204080652 U CN204080652 U CN 204080652U CN 201420316083 U CN201420316083 U CN 201420316083U CN 204080652 U CN204080652 U CN 204080652U
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- bridge
- reinforcing steel
- presstressed reinforcing
- adjusting device
- stressed
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- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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- Bridges Or Land Bridges (AREA)
Abstract
The utility model discloses a kind of pre-stressed bridge deflection adjusting device, comprise and be fixedly connected on the presstressed reinforcing steel between two bridge piers and the prestressing force governor motion for applying pulling force to presstressed reinforcing steel along bridge lateral, prestressing force governor motion comprises that to be sheathed on presstressed reinforcing steel outer and can along the sleeve of prestressing force longitudinal sliding motion, be articulated with sleeve and stretch out the pull bar outside girder case, be fixedly connected on the ground tackle of pull bar outer end and prop up the jack group peaking at ground tackle and bridge base plate, jack group comprises at least one hydraulic jack and at least one jackscrew, pre-stressed bridge deflection adjusting device of the present utility model can reduce the pre-stress loss of presstressed reinforcing steel, and presstressed reinforcing steel tension operating space is unrestricted simultaneously.
Description
Technical field
The utility model relates to bridge technology field, specifically a kind of pre-stressed bridge deflection adjusting device and pre-stressed bridge thereof.
Background technology
Concrete-bridge has place strong adaptability, the advantage that span ability is large, but there is the excessive problem of post deflection in most of concrete-bridge, for this reason, people have done the exploration of number of ways, think that by applying external prestressing be one of effective ways regulating concrete-bridge post deflection, external prestressing technique, as one of the effective means of bridge strengthening, more and more be widely used in bridge construction and maintenance works, external prestressing technique has and reduces the excessive amount of deflection of structure compared with other common reinforcement means, the advantage of the stress that release component is inner excessive.
During existing external prestressing strengthening construction, by applying pulling force to drag-line two ends, and to two ends anchoring.This longitudinal tension technology, needs large-tonnage tension equipment; Frictional force between presstressed reinforcing steel and pontic will cause larger loss of prestress; On the other hand, the tension of pre existing stress rib needs to operate in girder case, and operating space is narrow, complicated construction technique, and technical requirements is high.
Therefore, for overcoming the above problems, need a kind of externally prestressed bridge deflection adjusting device, presstressed reinforcing steel can be avoided because fricative loss of prestress, only need to adopt hydraulic jack, the situation that just can increase gradually according to bridge post deflection, the repeatedly corresponding regulation and control of in good time embodiment External prestressed; Operating space is unrestricted simultaneously.
Utility model content
In view of this, the purpose of this utility model overcomes defect of the prior art, provides a kind of and can reduce the pre-stress loss of the presstressed reinforcing steel unrestricted pre-stressed bridge deflection adjusting device in presstressed reinforcing steel tension operating space simultaneously.
Pre-stressed bridge deflection adjusting device of the present utility model, comprise and be fixedly connected on the presstressed reinforcing steel between two bridge piers and the prestressing force governor motion for applying pulling force to presstressed reinforcing steel along bridge lateral, prestressing force governor motion comprise be sheathed on presstressed reinforcing steel outer and can along the sleeve of prestressing force longitudinal sliding motion, be articulated with sleeve and stretch out pull bar outside girder case, be fixedly connected on the ground tackle of pull bar outer end and peak at the jack group of ground tackle and bridge base plate, jack group comprises at least one hydraulic jack and at least one jackscrew;
Further, described prestressing force governor motion also comprises to be located in girder case and reversing plate between bridge pier and sleeve, and reversing plate is longitudinally provided with through hole and reversing plate can vertically move along bridge along bridge, presstressed reinforcing steel by described through hole through reversing plate;
Further, the part of described presstressed reinforcing steel between bridge pier and reversing plate is also arranged in the horizontal direction near bridge top board;
Further, the distance of described sleeve bridge pier adjacent with both sides is equal and described pull bar vertically stretches out outside girder case;
Further, described pull bar comprises the multistage screw thread steel pole that head and the tail are fixedly connected sequentially, and adjacent segment screw thread steel pole is by indent screw and the detachable connection of evagination screw rod;
Further, described ground tackle comprises locking nut and backing plate, and the lateral dimension of backing plate is greater than locking nut lateral dimension and described jack is mounted between backing plate and bridge base plate;
This use is novel also discloses a kind of pre-stressed bridge, it is characterized in that: described pre-stressed bridge is provided with described pre-stressed bridge deflection adjusting device.
The beneficial effects of the utility model are: pre-stressed bridge deflection adjusting device of the present utility model, can be able to realize adjusting deflection of bridge span along bridge lateral tension to presstressed reinforcing steel, compare existing longitudinal tension equipment, only need less external force, equal prestressing force effect can be reached, significantly reduce the requirement to tension equipment, pre-stressed bridge deflection adjusting device of the present utility model, when carrying out tension to presstressed reinforcing steel, first can start hydraulic jack, when the prestressing force of presstressed reinforcing steel reaches setting value, in startup jackscrew, make it that ground tackle is supported on desired location.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the enlarged drawing at A place in Fig. 1.
Detailed description of the invention
Fig. 1 is structural representation of the present utility model, Fig. 2 is the enlarged drawing at A place in Fig. 1, as shown in the figure, pre-stressed bridge deflection adjusting device of the present utility model, comprise and be fixedly connected on the presstressed reinforcing steel 3 between two bridge piers 9 and the prestressing force governor motion for applying pulling force to presstressed reinforcing steel 3 along bridge lateral, prestressing force governor motion comprises that to be sheathed on presstressed reinforcing steel 3 outer and can along the sleeve 5 of prestressing force longitudinal sliding motion, be articulated with sleeve 5 and stretch out the pull bar outside girder case, be fixedly connected on the ground tackle 4 of pull bar outer end and prop up the jack group 6 peaking at ground tackle 4 and bridge base plate 10, jack group 6 comprises at least one hydraulic jack 8 and at least one jackscrew 11, two hydraulic jack 8 and two jackscrew 11 are adopted in the present embodiment, four jack are arranged in foursquare four angle points and two hydraulic jack 8 are arranged in foursquare to angle point.When needs regulate deflection of bridge span, hydraulic jack 8 can be started, make it by after presstressed reinforcing steel 3 tension to the prestress value of setting, in startup jackscrew 11, make it support ground tackle 4.
In the present embodiment, described prestressing force governor motion also comprises to be located in girder case and reversing plate 2 between bridge pier 9 and sleeve 5, reversing plate 2 is longitudinally provided with through hole 7 and reversing plate 2 can vertically move along bridge along bridge, presstressed reinforcing steel 3 passes reversing plate 2 by described through hole 7, because reversing plate 2 can along bridge longitudinal sliding motion, therefore by regulating reversing plate 2 to regulate the tension angle of presstressed reinforcing steel 3 with the distance of sleeve 5, herein " described tension angle is presstressed reinforcing steel 3 and the acute angle folded by vertical direction ", reversing plate 2 is moved toward near sleeve 5 direction, reach and increase presstressed reinforcing steel 3 pairs of bridge base plates 10 support top power upwards.
In the present embodiment, the part of described presstressed reinforcing steel 3 between bridge pier 9 and reversing plate 2 is also arranged in the horizontal direction near bridge top board 1, is conducive to the tension angle reducing presstressed reinforcing steel 3, thus increases presstressed reinforcing steel 3 pairs of bridge base plates 10 support top power upwards.
In the present embodiment, the distance of described sleeve 5 bridge pier adjacent with both sides 9 is equal and described pull bar vertically stretches out outside girder case, by pullover setting and bridge longitudinal center, can ensure that the active force of presstressed reinforcing steel 3 suffered by bridge pier 9 is equal, be conducive to the balance of bridge force-bearing.
In the present embodiment, described pull bar comprises the multistage screw thread steel pole that head and the tail are fixedly connected sequentially, and adjacent segment screw thread steel pole passes through indent screw and the detachable connection of evagination screw rod, can increase or subtract disconnected pull bar according to demand.
In the present embodiment, described ground tackle 4 comprises locking nut and backing plate, and the lateral dimension of backing plate is greater than locking nut lateral dimension and described jack group 6 is located between backing plate and bridge base plate 10, ensures that jack group 6 works safe and reliable.
The invention also discloses a kind of pre-stressed bridge, it is characterized in that: described pre-stressed bridge is provided with described pre-stressed bridge deflection adjusting device, this pre-stressed bridge can change according to bridge post deflection, in good time according to demand deflection of bridge span to be regulated, ensure safety and the application life of bridge.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (7)
1. a pre-stressed bridge deflection adjusting device, is characterized in that: comprise and be fixedly connected on the presstressed reinforcing steel between two bridge piers and the prestressing force governor motion for applying pulling force to presstressed reinforcing steel along bridge lateral; Described prestressing force governor motion comprise be sheathed on presstressed reinforcing steel outer and can along the sleeve of prestressing force longitudinal sliding motion, be articulated with sleeve and stretch out the pull bar outside girder case, the ground tackle being fixedly connected on pull bar outer end and a jack group peaked between ground tackle and bridge base plate; Described jack group comprises at least one hydraulic jack and at least one jackscrew.
2. pre-stressed bridge deflection adjusting device according to claim 1, is characterized in that: described prestressing force governor motion also comprises to be located in girder case and reversing plate between bridge pier and sleeve; Described reversing plate is longitudinally provided with through hole and reversing plate can vertically move along bridge along bridge; Described presstressed reinforcing steel passes reversing plate by described through hole.
3. pre-stressed bridge deflection adjusting device according to claim 2, is characterized in that: the part of described presstressed reinforcing steel between bridge pier and reversing plate is also arranged in the horizontal direction near bridge top board.
4. pre-stressed bridge deflection adjusting device according to claim 3, is characterized in that: the equal and described pull bar of the distance of described sleeve bridge pier adjacent with both sides vertically stretches out outside girder case.
5. pre-stressed bridge deflection adjusting device according to claim 4, is characterized in that: described pull bar comprises the multistage screw thread steel pole that head and the tail are fixedly connected sequentially, and adjacent segment screw thread steel pole is by indent screw and the detachable connection of evagination screw rod.
6. pre-stressed bridge deflection adjusting device according to claim 5, is characterized in that: described ground tackle comprises locking nut and backing plate, and the lateral dimension of described backing plate is greater than locking nut lateral dimension and described jack is mounted between backing plate and bridge base plate.
7. a pre-stressed bridge, is characterized in that: described pre-stressed bridge is provided with the pre-stressed bridge deflection adjusting device described in the arbitrary claim of claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420316083.0U CN204080652U (en) | 2014-06-13 | 2014-06-13 | Pre-stressed bridge deflection adjusting device and pre-stressed bridge thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420316083.0U CN204080652U (en) | 2014-06-13 | 2014-06-13 | Pre-stressed bridge deflection adjusting device and pre-stressed bridge thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204080652U true CN204080652U (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420316083.0U Expired - Lifetime CN204080652U (en) | 2014-06-13 | 2014-06-13 | Pre-stressed bridge deflection adjusting device and pre-stressed bridge thereof |
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| CN (1) | CN204080652U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107268460A (en) * | 2017-08-16 | 2017-10-20 | 上海浦东新区公路建设发展有限公司 | A kind of bridge strengthening device |
| CN108584703A (en) * | 2018-07-18 | 2018-09-28 | 安徽工业大学 | Double girder overhead crane lift heavy and Main Girder Deflection on-line measurement system and its measurement method |
| CN109333810A (en) * | 2018-10-22 | 2019-02-15 | 上海市政工程设计研究总院（集团）有限公司 | A kind of pre-tensioning system broken line steel bar pull-down device for bending up and its operating method |
| CN110130234A (en) * | 2019-05-07 | 2019-08-16 | 东南大学 | A kind of novel bridge reinforcement system and its construction method |
| CN110700113A (en) * | 2019-11-05 | 2020-01-17 | 中建交通建设集团有限公司 | Prestress applying device of non-prestressed beam bridge and construction method thereof |
| CN114351604A (en) * | 2022-02-28 | 2022-04-15 | 长沙理工大学 | Device for applying external prestress based on field relaxation and bridge reinforcing method |
| CN114922098A (en) * | 2022-05-07 | 2022-08-19 | 山东交通学院 | Stone arch bridge reinforcing device and method |
-
2014
- 2014-06-13 CN CN201420316083.0U patent/CN204080652U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107268460A (en) * | 2017-08-16 | 2017-10-20 | 上海浦东新区公路建设发展有限公司 | A kind of bridge strengthening device |
| CN108584703A (en) * | 2018-07-18 | 2018-09-28 | 安徽工业大学 | Double girder overhead crane lift heavy and Main Girder Deflection on-line measurement system and its measurement method |
| CN109333810A (en) * | 2018-10-22 | 2019-02-15 | 上海市政工程设计研究总院（集团）有限公司 | A kind of pre-tensioning system broken line steel bar pull-down device for bending up and its operating method |
| CN110130234A (en) * | 2019-05-07 | 2019-08-16 | 东南大学 | A kind of novel bridge reinforcement system and its construction method |
| CN110700113A (en) * | 2019-11-05 | 2020-01-17 | 中建交通建设集团有限公司 | Prestress applying device of non-prestressed beam bridge and construction method thereof |
| CN114351604A (en) * | 2022-02-28 | 2022-04-15 | 长沙理工大学 | Device for applying external prestress based on field relaxation and bridge reinforcing method |
| CN114351604B (en) * | 2022-02-28 | 2023-12-22 | 长沙理工大学 | Device based on in-situ release Zhang Shijia external prestress and bridge reinforcement method |
| CN114922098A (en) * | 2022-05-07 | 2022-08-19 | 山东交通学院 | Stone arch bridge reinforcing device and method |
| CN114922098B (en) * | 2022-05-07 | 2023-08-22 | 山东交通学院 | Stone arch bridge reinforcing device and method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150107 |