CN212771985U - Pushing device for steel box girder - Google Patents
Pushing device for steel box girder Download PDFInfo
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- CN212771985U CN212771985U CN202021189825.XU CN202021189825U CN212771985U CN 212771985 U CN212771985 U CN 212771985U CN 202021189825 U CN202021189825 U CN 202021189825U CN 212771985 U CN212771985 U CN 212771985U
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- hydraulic cylinder
- pad pier
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Abstract
A pushing device of a steel box girder comprises a slideway girder, a vertical jacking unit and a horizontal pushing unit, wherein the vertical jacking unit is fixedly arranged at four corners of the top surface of the slideway girder, and the horizontal pushing unit is connected to the central axis of the top surface of the slideway girder in a sliding manner; the horizontal pushing unit comprises a counter-force support, a horizontal hydraulic cylinder and a steel pad pier, wherein the counter-force support is fixedly welded at the middle part of the slide way beam, and the counter-force support is hinged and connected with the horizontal hydraulic cylinder along the gravity direction; the output end of the horizontal hydraulic cylinder is hinged and connected with the side wall of the steel pad pier along the gravity direction; the bottom surface of the steel pad pier is fixedly connected with a polytetrafluoroethylene plate. The pushing device effectively solves the problem of stress concentration of the connection of the steel pad pier and the vertical hydraulic cylinder, reduces the structural complexity of the steel pad pier, effectively reduces the fault probability of a complex structure when the steel pad pier bears the force to push, and is widely applicable to pushing construction of the steel box girder.
Description
Technical Field
The utility model relates to a bridge construction technical field, concretely relates to thrustor of steel case roof beam.
Background
With the continuous improvement of the design and construction technology level of bridges in China, a large number of continuous steel box girder bridges are developed in the fields of highways, urban traffic, railways and the like. The pushing method is widely applied to the construction because of the advantages of small occupied area, no influence on the traffic under the bridge, no need of large hoisting machines, safety, reliability, low cost and the like. The pushing construction method is that a prefabricated field is arranged behind a bridge abutment along the axial direction of a bridge, and a steel guide beam, a temporary pier, a slideway, a horizontal jack (also called a pushing power device or a pushing force application device) and the like are arranged. The pushing construction method is not only used for continuous beam bridges, but also can be used for other bridge types (such as simply supported beam bridges), and can also be used for continuous pushing construction firstly, and the continuity between beam spans is removed after the beam bridges are in place; the arch longitudinal beam of the arch bridge can be used for pushing construction among the upright columns; the main beam of the cable-stayed bridge can also be constructed by adopting a pushing method.
The jacking pneumatic cylinder is erect at interim mound top surface more among the prior art, the lateral wall of interim mound is connected with horizontal jack, the fixed welding I-steel support in edge of steel guide beam, the interim mound slides the in-process under this kind of condition and bears the tangential force of horizontal direction promptly, bear the case roof beam gravity of vertical direction again, this design leads to the excessive concentration of stress of the junction utmost point of interim mound and jacking pneumatic cylinder, reduce the stability that interim mound and jacking pneumatic cylinder supported, can take place the connectivity fracture when serious.
Therefore, how to improve the supporting stability and the service life of the pier support while ensuring the temporary pier pushing function in the prior art is a problem to be solved urgently by those skilled in the art.
Through published patent search, the following published patents were found:
the hydraulic pushing device (CN210658053U) discloses a hydraulic pushing device, which effectively solves the problems that the existing pushing device needs a long hole arranged on a track in advance, the cost is high, the manufacturing difficulty is high, and the stroke can not be adjusted in a stepless manner; the technical scheme for solving the problem is that the trolley comprises a trolley, wherein one side of the trolley is rotatably connected with a pushing oil cylinder, and the other side of the pushing oil cylinder is rotatably connected to a pushing support; the pushing support comprises two clamping plates and a rotating shaft, and one end of the rotating shaft penetrates through the two clamping plates and is in threaded engagement with a nut; the utility model discloses an avoided the lossy design that additionally punches on the track, greatly reduced construction cost, the practicality is strong.
Through analysis, the pushing device in the above-mentioned published patent is different in design starting point, pushing structure and solution problem compared with the present application, so that the novelty of the present application is not affected.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's weak point, provide a thrustor of steel box girder, this thrustor has effectively solved the stress concentration problem that steel pad mound and vertical pneumatic cylinder are connected, has reduced the structure complexity of steel pad mound, effectively reduces the fault probability of steel pad mound load top time complex structure, extensively is applicable to the top of steel box girder and pushes away the construction.
A pushing device of a steel box girder comprises a slideway girder, a vertical jacking unit and a horizontal pushing unit, wherein the vertical jacking unit is fixedly arranged at four corners of the top surface of the slideway girder, and the horizontal pushing unit is connected to the central axis of the top surface of the slideway girder in a sliding manner; the horizontal pushing unit comprises a counter-force support, a horizontal hydraulic cylinder and a steel pad pier, wherein the counter-force support is fixedly welded at the middle part of the slide way beam, and the counter-force support is hinged and connected with the horizontal hydraulic cylinder along the gravity direction; the output end of the horizontal hydraulic cylinder is hinged and connected with the side wall of the steel pad pier along the gravity direction; the bottom surface of the steel pad pier is fixedly connected with a polytetrafluoroethylene plate.
The vertical jacking unit comprises a bottom plate, a top plate and a plurality of vertical hydraulic cylinders, wherein the bottom plate is fixedly connected to the top surface of the slide way beam along the horizontal direction, and the plurality of vertical hydraulic cylinders are vertically and fixedly mounted on the top surface of the bottom plate; the output end of the vertical hydraulic cylinder is matched, fixed and horizontally props the top plate.
And the middle part of the top surface of the slideway beam is fixedly provided with a stainless steel slideway, the top surface of the stainless steel slideway is connected with a polytetrafluoroethylene plate at the bottom of the steel pad pier in a sliding fit manner, and the side wall of the stainless steel slideway is connected with the side wall of the steel pad pier in a sliding guide manner.
The utility model has the advantages and the technical effect be:
the pushing device of the steel box girder of the utility model supports the steel box girder movably by the lifting of the vertical jacking unit, and the vertical jacking unit bears the gravity of the steel box girder in the non-pushing state; the horizontal movable support steel box girder of unit is pushed up through the level, bears the gravity of steel box girder when pushing up the state by the steel pad mound to the steel pad mound of integral type structure can not be because of the shearing force deformation fracture that produces during the translation, and simple structure, has avoided the steel pad mound and the stress concentration problem that the jacking is connected with vertical pneumatic cylinder.
The utility model discloses a thrustor of steel box girder, the counter-force support through horizontal top pushes away the unit provides the fixed stay, wherein provide the translation power of steel pad mound by horizontal hydraulic cylinder, provide the translation direction of steel pad mound by the stainless steel slide, and connect with the bright and clean top surface sliding fit of stainless steel slide by the polytetrafluoroethylene board of steel pad mound bottom, in order to reduce the static friction that the two produced in the top pushes away, avoid the steel pad mound to bear too big shear stress; two ends of the horizontal hydraulic cylinder are hinged with the counter-force support and the side wall of the steel pad pier along the gravity direction respectively, so that the adverse effect of microscopic vibration in the pushing process of the steel pad pier on the supporting stability of the steel box girder can be reduced while the pushing direction is positioned.
The utility model discloses a thrustor of steel case roof beam provides jacking power through the vertical pneumatic cylinder of perpendicular jacking unit to guarantee the levelness that the steel case roof beam supported by roof and bottom plate.
The utility model discloses a thrustor of steel case roof beam has effectively solved the stress concentration problem that steel pad mound and vertical pneumatic cylinder are connected, has reduced the structure complexity of steel pad mound, effectively reduces the fault probability of the compound miscellaneous structure of steel pad mound load top when pushing away, and the top that extensively is applicable to the steel case roof beam pushes away the construction, is a thrustor that has higher creative steel case roof beam.
Drawings
Fig. 1 is a front view (working condition one) of the present invention;
FIG. 2 is a front view (working condition two) of the present invention;
fig. 3 is a front view (working condition three) of the present invention;
in the figure: 1-steel box girder; 2-a top plate; 3-a vertical hydraulic cylinder; 4-a bottom plate; 5-a slideway beam; 6-stainless steel slide; 7-a polytetrafluoroethylene plate; 8-steel pad pier; 9-horizontal hydraulic cylinder; 10-reaction force support.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments will be exemplified in conjunction with the accompanying drawings. It should be noted that the present embodiment is illustrative, not restrictive, and the scope of the invention should not be limited thereby.
A pushing device of a steel box girder 1 comprises a slideway girder 5, a vertical jacking unit and a horizontal pushing unit, wherein the vertical jacking unit is fixedly arranged at four corners of the top surface of the slideway girder, and the horizontal pushing unit is connected on a central axis of the top surface of the slideway girder in a sliding manner; the horizontal pushing unit comprises a counter-force support 10, a horizontal hydraulic cylinder 9 and a steel pad pier 8, wherein the counter-force support is fixedly welded at the middle part of the slide way beam, and the horizontal hydraulic cylinder is hinged on the counter-force support along the gravity direction; the output end of the horizontal hydraulic cylinder is hinged and connected with the side wall of the steel pad pier along the gravity direction; the bottom surface of the steel pad pier is fixedly connected with a polytetrafluoroethylene plate 7.
The vertical jacking unit comprises a bottom plate 4, a top plate 2 and a plurality of vertical hydraulic cylinders 3, wherein the bottom plate is fixedly connected to the top surface of the slideway beam along the horizontal direction, and the plurality of vertical hydraulic cylinders are vertically and fixedly mounted on the top surface of the bottom plate; the output end of the vertical hydraulic cylinder is matched, fixed and horizontally props the top plate.
And the middle part of the top surface of the slideway beam is fixedly provided with a stainless steel slideway 6, the top surface of the stainless steel slideway is connected with a polytetrafluoroethylene plate at the bottom of the steel pad pier in a sliding fit manner, and the side wall of the stainless steel slideway is connected with the side wall of the steel pad pier in a sliding guide manner.
In addition, the utility model discloses preferred, the polytetrafluoroethylene board has the bearing capacity height, and frictional resistance is little characteristics, for reducing the top pushes away in-process frictional resistance, paints lubricating oil between the bright and clean top surface of polytetrafluoroethylene board and stainless steel slide, paints the back coefficient of friction and is about 0.05. The stainless steel slide is installed on the slide roof beam that shaped steel welding formed, and thickness delta is 20mm, requires that the roughness deviation is less than 3mm, and the slide length of steel pad mound top is 3.6 m.
To more clearly illustrate the embodiments of the present invention, an example is provided below:
in the pushing device for the steel box girder of the utility model, the initial supporting state of the steel box girder is shown in figure 1, at the moment, the vertical hydraulic cylinder is in the jacking state, the horizontal hydraulic cylinder is in the retracting state, and the vertical jacking unit supports the steel box girder; when the steel box girder is subjected to pushing construction, as shown in fig. 2, the vertical hydraulic cylinder is in a retraction state until the top plate is separated from the bottom surface of the steel box girder, the steel box girder is supported by the steel pad pier, then the horizontal hydraulic cylinder is gradually converted into a horizontal ejection state from the retraction state, and the horizontal hydraulic cylinder pushes the steel pad pier to horizontally slide in the stainless steel slideway, so that the support and the translation of the steel box girder are realized; when the piston stroke of the horizontal hydraulic cylinder reaches the limit or the preset position, the vertical hydraulic cylinder continues to lift (as shown in figure 3), at the moment, the bottom surface of the steel box girder is separated from the top surface of the steel pad pier, and then the horizontal hydraulic cylinder resets and retracts to finish a pushing circulation. If the steel box girder needs to be pushed continuously, the construction sequence is repeated according to the figure 1, the figure 2 and the figure 3.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
Claims (3)
1. The utility model provides a thrustor of steel box girder which characterized in that: the device comprises a slideway beam, a vertical jacking unit and a horizontal jacking unit, wherein the vertical jacking unit is fixedly arranged at four corners of the top surface of the slideway beam, and the horizontal jacking unit is connected on a central axis of the top surface of the slideway beam in a sliding manner; the horizontal pushing unit comprises a counter-force support, a horizontal hydraulic cylinder and a steel pad pier, wherein the counter-force support is fixedly welded at the middle part of the slide way beam, and the horizontal hydraulic cylinder is hinged on the counter-force support along the gravity direction; the output end of the horizontal hydraulic cylinder is hinged and connected with the side wall of the steel pad pier along the gravity direction; and a polytetrafluoroethylene plate is fixedly connected to the bottom surface of the steel pad pier.
2. The thrustor of a steel box beam according to claim 1, wherein: the vertical jacking unit comprises a bottom plate, a top plate and a plurality of vertical hydraulic cylinders, wherein the bottom plate is fixedly connected to the top surface of the slideway beam along the horizontal direction, and the plurality of vertical hydraulic cylinders are vertically and fixedly mounted on the top surface of the bottom plate; and the output end of the vertical hydraulic cylinder is matched, fixed and horizontally props the top plate.
3. The thrustor of a steel box beam according to claim 1, wherein: and the middle part of the top surface of the slide way beam is fixedly provided with a stainless steel slide way, the top surface of the stainless steel slide way is connected with a polytetrafluoroethylene plate at the bottom of the steel pad pier in a sliding fit manner, and the side wall of the stainless steel slide way is connected with the side wall of the steel pad pier in a sliding guide manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021189825.XU CN212771985U (en) | 2020-06-24 | 2020-06-24 | Pushing device for steel box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021189825.XU CN212771985U (en) | 2020-06-24 | 2020-06-24 | Pushing device for steel box girder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212771985U true CN212771985U (en) | 2021-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021189825.XU Expired - Fee Related CN212771985U (en) | 2020-06-24 | 2020-06-24 | Pushing device for steel box girder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212771985U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892540A (en) * | 2022-06-13 | 2022-08-12 | 中交第二公路工程局有限公司 | Walking type pushing device and method for active adjustment of steel truss girder |
| CN116591064A (en) * | 2023-05-29 | 2023-08-15 | 中交一公局厦门工程有限公司 | Prefabricated box girder pushing device and pushing method |
-
2020
- 2020-06-24 CN CN202021189825.XU patent/CN212771985U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892540A (en) * | 2022-06-13 | 2022-08-12 | 中交第二公路工程局有限公司 | Walking type pushing device and method for active adjustment of steel truss girder |
| CN116591064A (en) * | 2023-05-29 | 2023-08-15 | 中交一公局厦门工程有限公司 | Prefabricated box girder pushing device and pushing method |
| CN116591064B (en) * | 2023-05-29 | 2024-03-15 | 中交一公局厦门工程有限公司 | Prefabricated box girder pushing device and pushing method |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210323 |
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| CF01 | Termination of patent right due to non-payment of annual fee |