CN209873552U - Bridge steel-concrete pier column structure with prestress - Google Patents
Bridge steel-concrete pier column structure with prestress Download PDFInfo
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- CN209873552U CN209873552U CN201920185359.9U CN201920185359U CN209873552U CN 209873552 U CN209873552 U CN 209873552U CN 201920185359 U CN201920185359 U CN 201920185359U CN 209873552 U CN209873552 U CN 209873552U
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Abstract
The utility model discloses a take prestressing force's bridge steel reinforced concrete pier stud structure, the pier stud structure include from the bottom up fixed connection's cushion cap, pier shaft in proper order and with steel box girder lower extreme fixed connection's steel construction pier cap, its characterized in that: the pier body includes pours concrete pier body as an organic whole and pours the reinforced concrete section pier body as an organic whole with the cushion cap with steel construction pier body, be equipped with the steel bundle of stretch-draw in pier body and the cushion cap, the steel bundle both ends respectively with the upper end of pier body and the lower extreme fixed connection of cushion cap. The reinforced concrete section pier body is arranged between the concrete pier body and the steel structure pier cap, so that the connection is firm; the whole tensile strength of the pier column is increased from the upper end of the reinforced concrete section pier body to the lower end of the bearing platform by adopting prestress tensioning, and the bearing capacity of the pier body is improved.
Description
Technical Field
The utility model relates to a pier stud structure belongs to bridge engineering technical field, specifically indicates a bridge steel reinforced concrete pier stud structure of taking prestressing force.
Background
The existing steel box girder bridge is generally connected with an upper steel box girder by adopting a concrete pier stud, a common mode is a support connection method, but under the condition that the design height and the shape of the pier stud are limited, the support installation cannot be carried out between the steel box girder and the pier stud, and only the steel box girder and the pier stud can be directly solidified. The method for concreting the steel box girder and the pier stud comprises the following steps: and a steel structure is arranged at the top of the concrete pier column, and the steel structure and the upper steel box girder are welded and consolidated. In the construction method, due to the fact that the welding seam has the durability problem, concrete cracks are prone to occur when the local stress of the pier column concrete at the bottom of the steel structure is too large, and the upper steel box girder body has the side turning risk in the long-term operation process.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects existing in the prior art and providing a bridge steel reinforced concrete pier stud structure with prestress, which has firm connection and improved pier stud bearing capacity.
In order to achieve the above object, the utility model provides a take bridge steel reinforced concrete pier stud structure of prestressing force, the pier stud structure include from the bottom up fixed connection's cushion cap, pier shaft in proper order and with steel box girder lower extreme fixed connection's steel construction pier cap, its characterized in that: the pier body includes pours concrete pier body as an organic whole and pours the reinforced concrete section pier body as an organic whole with the cushion cap with steel construction pier body, be equipped with the steel bundle of stretch-draw in pier body and the cushion cap, the steel bundle both ends respectively with the upper end of pier body and the lower extreme fixed connection of cushion cap.
Further, steel structure pier cap includes that the lower half is located the earlier dress steel structure pier cap in the reinforced concrete section pier shaft, adorn earlier and adorn steel structure pier cap after fixedly connected with between steel case roof beam and the steel structure pier cap.
Furthermore, a steel bundle sleeve is sleeved outside the steel bundle, and two ends of the steel bundle are anchored with the upper end of the pier body and the lower end of the bearing platform through anchoring devices.
The utility model has the advantages that: firm in connection, improve pier column bearing capacity. The reinforced concrete section pier body is arranged between the concrete pier body and the steel structure pier cap, so that the connection is firm; the whole tensile strength of the pier column is increased from the upper end of the reinforced concrete section pier body to the lower end of the bearing platform by adopting prestress tensioning, and the bearing capacity of the pier body is improved.
Drawings
Fig. 1 is a schematic view of a pier stud structure.
The components in the figures are numbered as follows: the steel box girder comprises a steel box girder 1, a steel structure pier cap 2, a steel structure pier cap 201 installed firstly, a steel structure pier cap 202 installed later, a pier body 4, a reinforced concrete section pier body 401, a concrete pier body 402, a bearing platform 5, a steel bundle 6, a steel bundle sleeve 7 and an anchoring device 8.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, which are not intended to limit the scope of the present invention.
As shown in fig. 1, a bridge steel reinforced concrete pier structure with prestress comprises a bearing platform 5, a pier body 4 and a steel structure pier cap 2, wherein the bearing platform 5 and the pier body 4 are fixedly connected in sequence from bottom to top, the steel structure pier cap 2 is fixedly connected with the lower end of a steel box girder 1, the pier body 4 comprises a concrete pier body 402 and a steel reinforced concrete section pier body 401, the concrete pier body 402 and the steel structure pier cap 2 are integrally cast, a tensioned steel bundle 6 is arranged in the pier body 4 and the bearing platform 5, a steel bundle sleeve 7 is sleeved outside the steel bundle 6, and two ends of the steel bundle 6 are anchored with the upper end of the pier body 4 and the lower end of the bearing platform 5 through an anchoring device 8. Therefore, the reinforced concrete section pier body is arranged between the concrete pier body and the steel structure pier cap, and the connection is firm; the whole tensile strength of the pier column is increased by adopting prestress tensioning from the upper end of the pier body of the reinforced concrete section to the lower end of the bearing platform, and the bearing capacity of the pier body is improved
Among the above-mentioned technical scheme, steel construction pier cap 2 includes that the lower half is located the earlier dress steel construction pier cap 201 of reinforced concrete section pier shaft 401, adorns earlier and adorn steel construction pier cap 202 after fixedly connected with between steel construction pier cap 201 upper end and the steel box girder 1.
Take prestressed bridge steel reinforced concrete pier stud structure's work progress:
firstly, positioning the steel bundle sleeve before the concrete construction of the bearing platform, pre-burying the anchoring device in the bearing platform, and penetrating the steel bundle through the steel bundle sleeve to ensure that the anchor backing plate is vertical to the steel bundle sleeve.
Secondly, concrete pouring construction of the bearing platform and the concrete pier body is firstly carried out, and the position of the steel bundle sleeve cannot be disturbed during pouring construction; and then positioning the pier cap with the steel structure, and pouring the reinforced concrete section pier body after the steel structure pier cap is installed.
Then, after the concrete strength of the pier body meets the tensioning requirement, tensioning the steel bundles, symmetrically tensioning the steel bundles at two sides from the center of the pier stud to the outside according to a symmetry principle during tensioning, measuring construction according to parameters such as actually adopted steel bundle sleeve friction coefficient, actually measured anchor mouth friction loss and the like, and confirming an actually measured extension value through design; and (3) grouting in time after the steel bundle is tensioned, wherein the grouting needs to be compacted, and the strength is not lower than M40.
And finally, after the prestress construction is finished, mounting the post-mounted steel structure pier cap, wherein the post-mounted steel structure pier cap extends into the upper steel box girder and adopts a fusion penetration welding process to ensure that the connection part meets the stress requirement.
Claims (3)
1. The utility model provides a take bridge steel reinforced concrete pier stud structure of prestressing force, the pier stud structure include from the bottom up fixed connection's cushion cap (5), pier shaft (4) in proper order and with steel box girder (1) lower extreme fixed connection's steel construction pier cap (2), its characterized in that: pier shaft (4) including pour concrete pier shaft (402) as an organic whole with cushion cap (5) and pour reinforced concrete section pier shaft (401) as an organic whole with steel construction pier cap (2), be equipped with in pier shaft (4) and cushion cap (5) and restrainted (6) of steel that have stretched tension, steel restraint (6) both ends respectively with the upper end of pier shaft (4) and the lower extreme fixed connection of cushion cap (5).
2. The prestressed bridge steel-concrete pier column structure according to claim 1, wherein: steel construction pier cap (2) include that the lower half is located earlier dress steel construction pier cap (201) of reinforced concrete section pier shaft (401), install earlier steel construction pier cap (202) of adorning after fixedly connected with between steel construction pier cap (201) upper end and steel box girder (1).
3. The prestressed bridge steel-concrete pier column structure according to claim 1, wherein: the steel bundle (6) is sleeved with a steel bundle sleeve (7), and two ends of the steel bundle (6) are anchored with the upper end of the pier body (4) and the lower end of the bearing platform (5) through an anchoring device (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920185359.9U CN209873552U (en) | 2019-02-01 | 2019-02-01 | Bridge steel-concrete pier column structure with prestress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920185359.9U CN209873552U (en) | 2019-02-01 | 2019-02-01 | Bridge steel-concrete pier column structure with prestress |
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| Publication Number | Publication Date |
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| CN209873552U true CN209873552U (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920185359.9U Active CN209873552U (en) | 2019-02-01 | 2019-02-01 | Bridge steel-concrete pier column structure with prestress |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114922054A (en) * | 2022-05-31 | 2022-08-19 | 浙江中天恒筑钢构有限公司 | Continuous rigid frame bridge prestressed steel concrete bearing platform structure and construction method thereof |
-
2019
- 2019-02-01 CN CN201920185359.9U patent/CN209873552U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114922054A (en) * | 2022-05-31 | 2022-08-19 | 浙江中天恒筑钢构有限公司 | Continuous rigid frame bridge prestressed steel concrete bearing platform structure and construction method thereof |
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