CN218667156U - Pretensioned prestressing steel concrete combined bracket bearing structure - Google Patents
Pretensioned prestressing steel concrete combined bracket bearing structure Download PDFInfo
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- CN218667156U CN218667156U CN202222655210.7U CN202222655210U CN218667156U CN 218667156 U CN218667156 U CN 218667156U CN 202222655210 U CN202222655210 U CN 202222655210U CN 218667156 U CN218667156 U CN 218667156U
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Abstract
The utility model relates to a stretch-draw pedestal bracket equipment field specifically is a pretension method prestressing force shaped steel concrete combination bracket bearing structure. The problems that concrete of a traditional tensioning pedestal is crushed, the concrete at a tensioned part is pulled to crack, and only one beam can be tensioned between two tensioning brackets are solved. The section steel concrete combined bracket is fixed on the tensioning pedestal and comprises a steel box formed by welding section steel, a plurality of I-shaped steel welded on one side of the steel box and a steel bar group fixed on the steel box; the steel box, the I-shaped steel and the steel bars are wrapped by concrete pouring. This device utilizes concrete parcel shaped steel and reinforcing bar group with the bearing area bracket, improves the compressive strength of concrete and has improved the wholeness of structure, simultaneously can the multi-disc Liang Tongbu stretch-draw, improves stretch-draw efficiency.
Description
Technical Field
The utility model relates to a stretch-draw pedestal bracket equipment field specifically is a pretension method prestressing force shaped steel concrete combination bracket bearing structure.
Background
Along with the continuous increase of the construction scale of bridge engineering, the assembled combined bridge structure is gradually and widely applied to actual engineering, and the structure has the advantages of component production standard, rapid and efficient construction and installation and environmental protection. For the prefabricated and assembled bridge, the main beam is directly assembled on site after being prefabricated in a factory, and the construction method has the advantages of low requirement on the site, short construction period and wide market prospect.
However, when the pretensioning method is adopted for construction, the traditional tensioning pedestal adopting common concrete pouring has the risk of crushing, and only the prestress of one beam can be tensioned between two tensioning brackets, and the characteristic of short construction period is not fully exerted.
SUMMERY OF THE UTILITY MODEL
The utility model provides a pretensioning method prestressing force shaped steel concrete combination bracket bearing structure has solved traditional stretch-draw pedestal concrete and has been conquashed, and the concrete that is drawn department is pulled and splits, can only stretch-draw the prestressing force scheduling problem of a slice roof beam between two stretch-draw brackets, and this device utilizes concrete parcel shaped steel and reinforcing bar group with the bearing area bracket, improves the compressive strength of concrete and has improved the wholeness of structure, simultaneously can the multi-disc Liang Tongbu stretch-draw, improves stretch-draw efficiency.
In order to achieve the above purpose, the utility model adopts the technical scheme as follows:
the utility model provides a pretensioning method prestressing force shaped steel concrete combination bracket bearing structure, shaped steel concrete combination bracket 2 are fixed in on stretch-draw pedestal 1, its characterized in that: the steel reinforced concrete combined bracket 2 comprises a steel box 4 formed by welding section steels, a plurality of I-shaped steel 6 welded on one side of the steel box 4 and a steel bar group 7 fixed on the steel box 4; the steel box 4, the I-shaped steel 6 and the steel bars 7 are wrapped through concrete pouring.
And the section steel concrete combined bracket 2 is provided with a pressure-bearing steel plate 3.
A plurality of anchoring steel plates 5 are arranged inside the steel box 4.
And a plurality of shear keys 8 are fixed on the steel box 4 and the I-shaped steel 6.
The utility model has the advantages that: 1) The structure has high bearing capacity, can be used for tensioning the main beam with more steel bundles, overcomes the defect of insufficient bearing capacity of the pre-tensioning concrete, applies the section steel and the high-performance concrete, reduces the material consumption, not only exerts the superior performance of two materials, but also ensures the economical efficiency of the whole structure.
2) The prestressed reinforcement of two girders can be tensioned between the two brackets of the structure, thereby greatly improving the production efficiency of the precast girders and shortening the construction period.
In conclusion, the bearing structure has the advantages of wide applicability, high bearing capacity, high production efficiency and the like.
Drawings
FIG. 1 is a schematic view of the overall structure of a tension table
FIG. 2 is a structural schematic diagram of a steel reinforced concrete combined bracket;
FIG. 3 is a schematic view of a mounting structure of a steel box and an I-shaped steel;
shown in the figure: the steel-concrete composite bracket comprises a tensioning pedestal 1, a steel reinforced concrete composite bracket 2, a pressure-bearing steel plate 3, a steel box 4, an anchoring steel plate 5, I-shaped steel 6, a steel bar group 7 and a shear key 8.
Detailed Description
The technical solution of the present invention is further described by the following specific embodiments with reference to the accompanying drawings:
example 1
As shown in figures 1-3, the pretensioning prestressed steel reinforced concrete combined bracket bearing structure is a scientific and reasonable steel reinforced concrete combined bracket 2 stress structure designed through detailed calculation and experiments, so that the using amounts of steel beams and concrete are greatly reduced, and the cost is reduced.
The structural steel concrete combined bracket 2 is shown in fig. 2 and 3 and comprises a steel box 4, an anchoring steel plate 5, an I-shaped steel 6, a steel bar group 7 and a shear key 8.
The steel box 4 is composed of steel sections welded together as shown in fig. 2 and 3, and when in use, concrete is filled and poured in the steel box and outside, so that the steel box and the concrete form a whole.
Inside anchor steel sheet 5 that is provided with of steel case 4, anchor steel sheet 5's effect is: concentrated load transmitted by the end part of the bracket is transmitted to the UHPC in a distributed load mode, so that the local compressive stress of the UHPC is reduced; and meanwhile, the concrete in the pressure bearing area is wrapped, so that the bearing capacity of the structure is greatly improved.
A plurality of I-shaped steel 6 which are transversely and longitudinally arranged are welded and fixed on one side of the steel box 4, and the I-shaped steel 6 has the following functions: the load at the end of the bracket is transferred to the interior of the structure, and simultaneously, the bracket and the UHPC are stressed together.
As shown in fig. 2, a reinforcing steel bar group 7 which is transversely and longitudinally arranged is welded and fixed on one side of the steel box 4, and the reinforcing steel bar group 7 is connected with concrete, so that the integrity of the steel box 4 and the concrete structure is ensured.
As shown in fig. 2 and 3, the steel box 4 and the i-shaped steel 7 are both provided with shear keys 8, so that the sliding between the concrete and the steel plate can be prevented, and the structural integrity can be enhanced.
The whole tensioning pedestal is made of C50 concrete, and the bracket structure is made of high-performance concrete, so that the compression strength and the tensile strength of the bearing structure are improved, the consumption of concrete is reduced, and the cost is saved.
The specific implementation process comprises the following steps:
1, firstly, supporting a tensioning pedestal 1 template, fixing the internal section steel and the vertical steel bars of the concrete, and then, pouring the concrete.
And 2, after the concrete of the bearing platform is solidified, detaching the template, binding transverse steel bars and supporting the bracket template.
And 3, pouring the UHPC material of the bracket, maintaining, and stretching the prestressed reinforcement after the structure reaches the design strength.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. The utility model provides a pretensioning method prestressing force shaped steel concrete combination bracket bearing structure, shaped steel concrete combination bracket are fixed in on the stretch-draw pedestal, its characterized in that: the steel reinforced concrete combined bracket comprises a steel box formed by welding profile steels, a plurality of I-shaped steel welded on one side of the steel box and a steel bar group fixed on the steel box; the steel box, the I-shaped steel and the steel bars are wrapped by concrete pouring.
2. The pretensioned prestressed steel reinforced concrete composite corbel load-bearing structure according to claim 1, wherein: and a pressure-bearing steel plate is arranged on the section steel concrete combined bracket.
3. The pretensioned prestressed steel reinforced concrete composite corbel load-bearing structure according to claim 1, wherein: and a plurality of anchoring steel plates are arranged in the steel box.
4. The pretensioned prestressed steel reinforced concrete composite corbel load-bearing structure according to claim 1, wherein: and a plurality of shear keys are fixed on the steel box and the I-shaped steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222655210.7U CN218667156U (en) | 2022-10-09 | 2022-10-09 | Pretensioned prestressing steel concrete combined bracket bearing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202222655210.7U CN218667156U (en) | 2022-10-09 | 2022-10-09 | Pretensioned prestressing steel concrete combined bracket bearing structure |
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| CN218667156U true CN218667156U (en) | 2023-03-21 |
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| CN202222655210.7U Active CN218667156U (en) | 2022-10-09 | 2022-10-09 | Pretensioned prestressing steel concrete combined bracket bearing structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115434252A (en) * | 2022-10-09 | 2022-12-06 | 甘肃交设智远实业有限公司 | Pretensioned prestressing steel concrete combined bracket bearing structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115434252A (en) * | 2022-10-09 | 2022-12-06 | 甘肃交设智远实业有限公司 | Pretensioned prestressing steel concrete combined bracket bearing structure |
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