CN114000410A - Anti-overturning structure of steel box girder - Google Patents
Anti-overturning structure of steel box girder Download PDFInfo
- Publication number
- CN114000410A CN114000410A CN202111498366.2A CN202111498366A CN114000410A CN 114000410 A CN114000410 A CN 114000410A CN 202111498366 A CN202111498366 A CN 202111498366A CN 114000410 A CN114000410 A CN 114000410A
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- China
- Prior art keywords
- box girder
- steel
- steel box
- concrete
- overturning structure
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to the technical field of bridge engineering, in particular to an anti-overturning structure of a steel box girder, which is used for connecting the steel box girder with a pier; the method comprises the following steps of pouring concrete in a steel box girder and connecting steel bars pre-buried in a pier; and the other end of the connecting steel bar sequentially penetrates through the steel box girder and the concrete and is fixedly connected with the concrete. The invention can effectively connect the steel box girder with the pier, avoids the risks of overturning and girder falling possibly faced by the bridge and does not influence the longitudinal displacement of the girder body under the action of temperature.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to an anti-overturning structure of a steel box girder.
Background
The steel box girder is convenient to process due to the material, has strong structural bearing capacity, and is suitable for various special-shaped landscape bridges and curved bridges. Because of structure dysmorphism or plane are the curve, and the steel construction dead weight is lighter, leads to appearing the support negative reaction promptly the support to take off empty (often in beam-ends support), adopts in prior art at relevant position department counterweight concrete, nevertheless has following problem:
1. the problem of support seat void can not be completely solved by the counterweight concrete, and the concrete counterweight in the box can not meet the balance requirement;
2. the pier beam is completely solidified and cannot release temperature force, and the bending moment of the top and the bottom of the pier is large;
3. the beam falling prevention stop block and the beam falling prevention cover limiting measure have the advantages that the limiting space is limited, the beam falling problem under the extreme condition can not be solved, the beam falling prevention cover is only suitable for the cylindrical pier, the application range is limited, and the support can not be replaced.
Disclosure of Invention
In order to effectively solve the above problems, an object of the present invention is to provide an anti-overturning structure of a steel box girder; the steel box girder and the abutment are connected together, so that the risks of overturning and girder falling which the bridge possibly faces are avoided, and the longitudinal displacement of the girder body under the temperature action is not influenced.
The invention is realized by the following technical scheme:
an anti-overturning structure of a steel box girder is used for connecting the steel box girder with an abutment; the method comprises the following steps of pouring concrete in a steel box girder and connecting steel bars pre-buried in a pier; and the other end of the connecting steel bar sequentially penetrates through the steel box girder and the concrete and is fixedly connected with the concrete.
Further, in order to better implement the present invention,
the device also comprises a support arranged between the steel box girder and the abutment.
Further, in order to better implement the present invention,
and an anchorage device connected with the connecting steel bar is embedded in the pier.
Further, in order to better implement the present invention,
the anchorage device comprises an anchorage device body and a spiral rib which is arranged on one side of the anchorage device body close to the steel box girder and sleeved on the outer side of the connecting steel bar.
Further, in order to better implement the present invention,
the anchorage device is also provided with a first steel pipe; the steel pipe suit connects the outside of reinforcing bar, and is located between spiral muscle and the connecting reinforcement.
Further, in order to better implement the present invention,
the top surface of concrete is provided with and is used for the fixed connection reinforcing bar to keep away from one section fixing device of pier.
Further, in order to better implement the present invention,
the fixing device comprises a steel plate arranged on the top surface of the concrete, and a nut arranged on the steel plate and sleeved on the outer side of the connecting steel bar.
Further, in order to better implement the present invention,
a second steel pipe is arranged in the concrete, and the second steel pipe is sleeved outside the connecting steel bar; and one end of the second steel pipe close to the pier is coplanar with the bottom of the steel box girder.
Further, in order to better implement the present invention,
and a reinforcing mesh is arranged in the concrete.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the steel box girder and the abutment are effectively connected together through the mutual matching of the support and the connecting steel bars, so that the risks of overturning and girder falling possibly faced by the bridge are avoided, and the longitudinal displacement of the girder body under the temperature action is not influenced;
(2) the invention has simple structure and strong practicability.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
1, a nut; 2. a steel plate; 3. a reinforcing mesh; 4. counterweight concrete; 51. a first steel pipe; 52. a second steel pipe; 6. connecting reinforcing steel bars; 7. a spiral rib; 8. an anchor body; 9. pier abutment; 10. a steel box girder; 20. and (4) a support.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or member referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1-2:
an anti-overturning structure of a steel box girder 10 is used for connecting the steel box girder 10 with an abutment; the steel box girder comprises concrete poured in a steel box girder 10 and connecting steel bars 6 pre-buried in a pier; and the other end of the connecting steel bar 6 sequentially penetrates through the steel box girder 10 and the concrete and is fixedly connected with the concrete.
Further, in order to better implement the present invention, in order to implement the support for the bottom of the steel box girder 10;
and a support 20 arranged between the steel box girder 10 and the abutment.
Further, in order to better realize the invention, the connection of the connecting steel bars 6 in the abutment is firmer in order to effectively realize the invention;
an anchorage device connected with the connecting steel bar 6 is embedded in the abutment.
Further, in order to better implement the present invention,
the anchorage device comprises an anchorage device body 8 and a spiral rib 7 which is arranged on one side of the anchorage device body 8 close to the steel box girder 10 and sleeved on the outer side of the connecting reinforcing steel bar 6.
Preferably, when the connecting bars 6 are twisted bars, the anchorage is a twisted bar anchorage, so that the anchorage is more in place.
Further, in order to better implement the present invention,
the anchorage device is also provided with a first steel pipe 51; the first steel pipe 51 is sleeved on the outer side of the connecting steel bar 6 and is located between the spiral rib 7 and the connecting steel bar 6.
Further, in order to better implement the present invention, in order to effectively implement the connection of the connecting steel bar 6 and the counterweight concrete 4;
the top surface of concrete is provided with the fixing device who is used for one section of fixed connection reinforcing bar 6 keep away from the pier.
Further, in order to better implement the present invention,
fixing device is including installing steel sheet 2 at the concrete top surface, installing on steel sheet 2 and the suit is at the nut 1 in the 6 outsides of connecting reinforcement.
Further, in order to better implement the present invention,
a second steel pipe 52 is arranged in the concrete, and the second steel pipe 52 is sleeved on the outer side of the connecting steel bar 6; one end of the second steel pipe 52 close to the abutment is coplanar with the bottom of the steel box girder 10.
Further, in order to better implement the present invention,
and a reinforcing mesh 3 is arranged in the concrete.
Preferably, the first steel pipe 51 and the second steel pipe 52 have the same structure and are both rectangular steel pipes with rectangular sections; this enables the connecting reinforcement 6 to be bent at a small angle in the longitudinal direction so that the longitudinal displacement of the steel box girder 10 under the temperature is not affected.
When the pier is constructed, the connecting steel bars 6 are pre-buried in the pier, the connecting steel bars 6 are fixed through the anchorage device, then the second steel pipe 52 is sleeved on the outer side of the connecting steel bars 6, and the second steel pipe 52 is installed on the end face, close to the steel box girder 10, of the anchorage device body 8;
installing the support 20 on the pier, and then constructing the steel box girder 10;
when the steel box girder 10 is constructed, a hole is formed in a bottom plate of the steel box girder 10, a first steel pipe 51 is installed on the hole, and the first steel pipe 51 and the hole are coaxially arranged, so that the connecting steel bar 6 can penetrate through the bottom plate and enter the steel box girder 10;
binding a reinforcing mesh 3 in the steel box girder 10, pouring the counterweight concrete 4, and installing a steel plate 2 and a nut 1 on the top surface of the counterweight concrete 4; the connecting steel bar 6 sequentially penetrates through the counterweight concrete 4 and the steel plate 2 and is connected with the nut 1.
Preferably, the connecting steel bars 6 are spiral steel bars, and the nuts 1 are JLM nuts; in the actual use process, the height of the counterweight concrete 4 is not less than 20cm, and an operation space is reserved in the box for anchoring; when the temperature is higher than the set temperature.
Preferably, the connecting steel bars are two groups and are symmetrically arranged along the supporting center line of the transverse bridge direction; the steel plate can adopt one plate for connecting two connecting steel bars.
In the invention, the nut 1 and the connecting steel bar 6 are detachable, and the nut 1 and the beam body are jacked up when the support 20 is replaced, so that the replacement of the support 20 is not influenced.
The invention can effectively connect the abutment and the steel box girder 10 together, effectively improve the overturn resistance of the curved steel box girder 10, is arranged at the inner side of the support 20, does not influence the integral appearance of the bridge, can be disassembled, does not influence the replacement of the support 20, has certain longitudinal moving space, and can effectively release temperature force.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (9)
1. An anti-overturning structure of a steel box girder is used for connecting the steel box girder with an abutment; the method is characterized in that: the method comprises the following steps of pouring concrete in a steel box girder and connecting steel bars pre-buried in a pier; and the other end of the connecting steel bar sequentially penetrates through the steel box girder and the concrete and is fixedly connected with the concrete.
2. The anti-overturning structure of the steel box girder according to claim 1, wherein: the device also comprises a support arranged between the steel box girder and the abutment.
3. The anti-overturning structure of the steel box girder according to claim 2, wherein: and an anchorage device connected with the connecting steel bar is embedded in the pier.
4. The anti-overturning structure of the steel box girder according to claim 3, wherein: the anchorage device comprises an anchorage device body and a spiral rib which is arranged on one side of the anchorage device body close to the steel box girder and sleeved on the outer side of the connecting steel bar.
5. The anti-overturning structure of the steel box girder according to claim 4, wherein: the anchorage device is also provided with a first steel pipe; the steel pipe suit connects the outside of reinforcing bar, and is located between spiral muscle and the connecting reinforcement.
6. The anti-overturning structure of the steel box girder according to claim 1, wherein: the top surface of concrete is provided with and is used for the fixed connection reinforcing bar to keep away from one section fixing device of pier.
7. The anti-overturning structure of the steel box girder according to claim 6, wherein: the fixing device comprises a steel plate arranged on the top surface of the concrete, and a nut arranged on the steel plate and sleeved on the outer side of the connecting steel bar.
8. The anti-overturning structure of the steel box girder according to claim 7, wherein: a second steel pipe is arranged in the concrete, and the second steel pipe is sleeved outside the connecting steel bar; and one end of the second steel pipe close to the pier is coplanar with the bottom of the steel box girder.
9. The anti-overturning structure of the steel box girder according to claim 8, wherein: and a reinforcing mesh is arranged in the concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111498366.2A CN114000410A (en) | 2021-12-09 | 2021-12-09 | Anti-overturning structure of steel box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111498366.2A CN114000410A (en) | 2021-12-09 | 2021-12-09 | Anti-overturning structure of steel box girder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114000410A true CN114000410A (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111498366.2A Pending CN114000410A (en) | 2021-12-09 | 2021-12-09 | Anti-overturning structure of steel box girder |
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| Country | Link |
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| CN (1) | CN114000410A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114717951A (en) * | 2022-03-18 | 2022-07-08 | 安徽省公路桥梁工程有限公司 | Construction method for mounting heavy concrete on large-span multi-box steel box girder |
-
2021
- 2021-12-09 CN CN202111498366.2A patent/CN114000410A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114717951A (en) * | 2022-03-18 | 2022-07-08 | 安徽省公路桥梁工程有限公司 | Construction method for mounting heavy concrete on large-span multi-box steel box girder |
| CN114717951B (en) * | 2022-03-18 | 2024-06-18 | 安徽省公路桥梁工程有限公司 | Construction device and construction method for installing heavy concrete on large-span multi-box steel box girder |
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