CN219410577U - Full framing prestressing force stretch-draw pre-compaction structure - Google Patents
Full framing prestressing force stretch-draw pre-compaction structure Download PDFInfo
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- CN219410577U CN219410577U CN202320911151.7U CN202320911151U CN219410577U CN 219410577 U CN219410577 U CN 219410577U CN 202320911151 U CN202320911151 U CN 202320911151U CN 219410577 U CN219410577 U CN 219410577U
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Abstract
The utility model discloses a full framing prestress tensioning and prepressing structure, which comprises a bottom tensioning foundation fixed on a foundation and a top tensioning mechanism arranged at the top of the full framing, wherein the top tensioning mechanism is connected with the bottom tensioning foundation through a plurality of detachable prestress steel bars and compresses the full framing on the foundation; the top tensioning mechanism comprises an upper top beam and a plurality of supporting components which are arranged at intervals and are supported between the upper top beam and the top of the full framing, and the prestressed reinforcement is detachably connected with the upper top beam. The utility model applies stable pressure to the full framing from the top of the full framing downwards, thereby providing continuous and stable reinforcement effect for the full framing; the utility model has simple structure, convenient construction and disassembly and repeated use, and can effectively improve the field construction quality of the full framing and effectively reduce the overall construction measure cost and the material cost.
Description
Technical Field
The utility model relates to the technical field of bridge engineering construction, in particular to a full framing prestress tensioning and prepressing structure.
Background
The large-span box girder bridge is widely applied to urban construction at present, the construction of bridges in cities is very different from the construction of bridges in mountainous areas, for example, the definition and standardization in the construction process, the requirements on appearance quality in the construction process and the like are different, and the construction method and the construction process also need to apply more environment-friendly advanced technology for urban construction with stricter construction requirements.
In various bridge constructions, different bridge structures are different in bracket form, for example, brackets, full framing, steel pipe brackets and the like are commonly adopted in the continuous rigid frame bridge construction process, basket hanging construction is adopted in each section construction, the process is mature, and the overall quality and safety control are good; in the side span cast-in-situ construction, the support structures such as a full framing, a steel pipe support and a bracket are generally adopted, and the full framing is relatively mature in whole, but the full framing can adopt a large number of closely-distributed scaffolds, and the stress condition is complex due to a large number of stress points of the whole support structure, so that the support can be pre-pressed to play the roles of providing the structural stability of the whole support and reinforcing the foundation during the construction of the full framing. The pre-pressing structure adopted in the construction of the full framing at present has complex structure, is troublesome to assemble and disassemble, is inconvenient to construct and has long construction period.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the prestress tensioning and prepressing structure of the full framing is convenient to construct and good in reinforcing effect.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the full framing prestress tensioning and prepressing structure comprises a bottom tensioning foundation fixed on a foundation and a top tensioning mechanism arranged at the top of the full framing, wherein the top tensioning mechanism is connected with the bottom tensioning foundation through a plurality of detachable prestress steel bars and compresses the full framing on the foundation; the top tensioning mechanism comprises an upper top beam and a plurality of supporting components which are arranged at intervals and are supported between the upper top beam and the top of the full framing, and the prestressed reinforcement is detachably connected with the upper top beam.
Further, the supporting component is a jack, and the prestressed reinforcement is in limit fit with the jack through fixing bolts on the upper surface and the lower surface of the upper top beam.
Further, gaskets are arranged between the upper top beam and the fixing bolts, and the gaskets are in one-to-one correspondence with the prestressed reinforcement.
Further, the device also comprises a bottom supporting mechanism which is formed at the bottom of the supporting part and comprises a base cross beam, a bottom transverse beam and a longitudinal distributing beam; the base cross beams and the bottom transverse beams are arranged at intervals up and down and extend along the arrangement direction of the supporting components, and the longitudinal distribution beams are supported between the base cross beams and the bottom transverse beams and are arranged at intervals along the arrangement direction of the supporting components.
Further, the longitudinal distribution beams are in one-to-one correspondence with the supporting parts, and each longitudinal distribution beam is positioned right below the corresponding supporting part.
Further, the bottom stretching foundation is a concrete casting piece cast in the foundation, a plurality of grouting holes corresponding to the prestressed steel bars one by one are formed in the foundation, anchoring ribs extending out of the grouting holes are fixed in the concrete casting piece, and the prestressed steel bars are connected with the anchoring ribs.
Further, the prestressed reinforcement is detachably connected with the anchoring reinforcement through a connector.
The beneficial effects of the utility model are as follows: according to the utility model, the prestress tensioning pre-pressing structure is added on the full framing, the top tensioning mechanism and the bottom tensioning foundation are matched to tension a plurality of prestress steel bars penetrating through the full framing, and the upper top beam for fixing the prestress steel bars is supported upwards through the supporting component to provide tensioning force; the utility model has simple structure, convenient construction and disassembly and repeated use, and can effectively improve the field construction quality of the full framing and effectively reduce the overall construction measure cost and the material cost.
Drawings
FIG. 1 is a schematic view of a full framing prestress tension preload structure assembled on a full framing;
fig. 2 is a schematic diagram showing the cooperation of the top tensioning mechanism and the bottom support mechanism in the full framing prestress tensioning and preloading structure.
Marked in the figure as: 100-foundation, 200-full framing, 300-prestressed reinforcement, 310-top beam, 320-supporting component, 330-fixing bolt, 340-spacer, 410-base cross beam, 420-bottom transverse beam, 430-longitudinal distribution beam, 500-grouting hole, 600-anchor bar, 700-connector.
Detailed Description
In order to facilitate an understanding of the utility model, the utility model is further described below with reference to the accompanying drawings.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "upper", "lower", "inner", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description, and do not indicate or imply that the apparatus or components referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
The full framing prestress tension pre-compression structure disclosed by the utility model comprises a bottom tension foundation, a top tension mechanism and prestress steel bars 300, wherein the bottom tension foundation is arranged in a foundation 100 for installing the full framing 200, the top tension mechanism is arranged at the top of the full framing 200, the bottom tension foundation and the top tension mechanism are matched to tension the prestress steel bars 300 so as to provide prestress for the full framing 200 to offset the tensile stress suffered by the full framing 200, the stress condition of the full framing 200 can be improved, the full framing 200 and the foundation 100 for supporting the full framing 200 can be reinforced, and the stability of the full framing 200 can be improved.
In the present utility model, the prestressing force is provided by stretching the prestressing steel 300 by the top stretching mechanism. Specifically, as shown in fig. 1 and 2, the top tensioning mechanism includes an upper header 310 and a support member 320, the upper header 310 being operable to fixedly mount the pre-stressing tendons 300; the bottom ends of the prestressed rebars 300 are connected with the bottom tensioning foundation, the top ends of the prestressed rebars 300 are fixed on the upper top beam 310, a plurality of supporting members 320 are arranged between the upper top beam 310 and the top of the full framing 200, the upper top beam 310 is supported upwards by the supporting members 320 to tension the prestressed rebars 300 connected to the upper top beam 310, the prestressed rebars 300 can be used for applying prestress to the full framing 200 through the top tensioning mechanism to offset the tensile stress of the full framing 200 due to load, and the full framing 200 can be reinforced and the rigidity and stability of the structure can be improved. In the present utility model, a plurality of supporting members 320 are provided, and the plurality of supporting members 320 are uniformly arranged at intervals along the length extension direction of the upper header 310, so that the loading of the full framing 200 is uniform and the pre-stressing effect applied is improved.
The supporting member 320 may be a rigid structure with good stability, and in order to further improve the tensioning effect on the prestressed reinforcement 300, a jack is used as the supporting member 320, and the jack can further apply an upward acting force on the top beam 310 through the self-pressurization effect while supporting the top beam 310, so that the prestressed reinforcement 300 generates stronger prestress. The prestressed reinforcement 300 is provided with external threads, so that the prestressed reinforcement 300 can be fixed on the upper top beam 310 through the threaded cooperation of the fixing bolt 330 and the prestressed tightening 300; meanwhile, the fixing mode of the threaded connection is also convenient for dismounting the prestressed reinforcement 300, construction and installation and subsequent dismounting, and the prestressed reinforcement can be reused after dismounting. Gaskets 340 can be added between the upper top beam 310 and the fixing bolts 330 to increase the contact area, protect the upper top beam 310, prevent the screw connection between the fixing bolts 330 and the prestressed reinforcement 300 from loosening, and improve the connection stability of the two.
In order to improve the stability of the top tensioning mechanism and to improve the compression of the top tensioning mechanism to the full frame 200, the full frame 200 is uniformly stressed. The present utility model also adds a bottom support mechanism between the top tensioning mechanism and the full framing 200, as shown in fig. 1 and 2, which includes a base cross beam 410, a bottom transverse beam 420, and a longitudinal distribution beam 430; the base cross member 410 and the bottom transverse member 420 are disposed at an upper and lower interval and extend in the arrangement direction of the support members 320, and a plurality of longitudinal distribution beams 430 are supported between the base cross member 410 and the bottom transverse member 420 and are disposed at an interval in the arrangement direction of the support members 320. The longitudinal distribution beams 430 are preferably in one-to-one correspondence with the support members 320, and the longitudinal distribution beams 430 are disposed directly under the corresponding support members 320 so as to be directly supported at the pressing points of the support members 320.
The bottom tensioning foundation adopted in the utility model is a concrete casting piece cast in the foundation 100, as shown in fig. 1, a plurality of grouting holes 500 are drilled in the foundation 100, the grouting holes 500 are in one-to-one correspondence with the prestressed rebars 300, the lower ends of the prestressed rebars 300 are connected with the anchor bars 600, the lower ends of the anchor bars 600 are fixed in the corresponding grouting holes 500 in a grouting concrete mode, the upper ends of the anchor bars 600 extend out of the grouting holes 500 and are connected with the corresponding prestressed rebars 300, and the bottom tensioning foundation and the top tensioning mechanism are matched to tension the prestressed rebars 300 penetrating through the full framing 200. In the utility model, when the lower end of the prestressed reinforcement 300 is connected with the anchoring rib 600, the lower end of the prestressed reinforcement 300 and the anchoring rib 600 are inconvenient to directly connect, so that the connector 700 is added as a relay for connecting the prestressed reinforcement 300 with the anchoring rib 600, the specific shape of the connector 700 is not limited, the connector 700 is fixed at the lower end of the prestressed fastening 300 in a welding or other fixed connection mode, a hook or hanging ring type structure is arranged on the connector 700, the upper end of the anchoring rib 600 is bent to be hooked and connected with the connector 700, the structure is simple and easy to realize, and the dismounting between the anchoring rib 600 and the connector 700 is convenient.
Claims (7)
1. Full framing prestressing force stretch-draw pre-compaction structure, its characterized in that: the device comprises a bottom tensioning foundation fixed on a foundation (100) and a top tensioning mechanism arranged at the top of a full framing (200), wherein the top tensioning mechanism is connected with the bottom tensioning foundation through a plurality of detachable prestressed steel bars (300) and compresses the full framing (200) on the foundation (100); the top tensioning mechanism comprises an upper top beam (310) and a plurality of supporting components (320) which are arranged at intervals and are supported between the upper top beam (310) and the top of the full framing (200), and the prestressed reinforcement (300) is detachably connected with the upper top beam (310).
2. A full framing prestress tensioning preload structure as set forth in claim 1 wherein: the supporting component (320) is a jack, and the prestressed reinforcement (300) is in limit fit with the jack through a fixing bolt (330) formed on the upper surface and the lower surface of the upper top beam (310).
3. A full framing prestress tensioning preload structure as set forth in claim 2 wherein: and gaskets (340) are further arranged between the upper top beam (310) and the fixing bolts (330), and the gaskets (340) are in one-to-one correspondence with the prestressed reinforcement (300).
4. A full framing prestress tensioning preload structure as set forth in claim 1 wherein: further comprising a bottom support mechanism formed at the bottom of the support member (320), said bottom support mechanism comprising a base cross beam (410), a bottom transverse beam (420) and a longitudinal distribution beam (430); the base cross beam (410) and the bottom transverse beam (420) are arranged at intervals up and down and extend along the arrangement direction of the supporting component (320), and the plurality of longitudinal distribution beams (430) are supported between the base cross beam (410) and the bottom transverse beam (420) and are arranged at intervals along the arrangement direction of the supporting component (320).
5. A full framing prestress tensioning preload structure as set forth in claim 4 wherein: the longitudinal distribution beams (430) are in one-to-one correspondence with the supporting parts (320), and each longitudinal distribution beam (430) is positioned right below the corresponding supporting part (320).
6. A full framing prestress tensioning preload as set forth in any one of claims 1 through 5 wherein: the bottom stretch-draw foundation is the concrete casting piece of pouring in foundation (100), is equipped with a plurality of grouting holes (500) that correspond with prestressing steel (300) one-to-one in foundation (100), and concrete casting piece internal fixation has anchor muscle (600) that stretch out to outside grouting holes (500), prestressing steel (300) are connected with anchor muscle (600).
7. A full framing prestress tensioning preload structure as set forth in claim 6 wherein: the prestressed reinforcement (300) is detachably connected with the anchor bar (600) through the connector (700).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320911151.7U CN219410577U (en) | 2023-04-21 | 2023-04-21 | Full framing prestressing force stretch-draw pre-compaction structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320911151.7U CN219410577U (en) | 2023-04-21 | 2023-04-21 | Full framing prestressing force stretch-draw pre-compaction structure |
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| CN219410577U true CN219410577U (en) | 2023-07-25 |
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| CN202320911151.7U Active CN219410577U (en) | 2023-04-21 | 2023-04-21 | Full framing prestressing force stretch-draw pre-compaction structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116463953A (en) * | 2023-04-21 | 2023-07-21 | 中国十九冶集团有限公司 | Prestressed Tensioned Preloaded Structure and Construction Method of Mantang Bracket |
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2023
- 2023-04-21 CN CN202320911151.7U patent/CN219410577U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116463953A (en) * | 2023-04-21 | 2023-07-21 | 中国十九冶集团有限公司 | Prestressed Tensioned Preloaded Structure and Construction Method of Mantang Bracket |
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