CN219174982U - Cast-in-situ prestressed concrete box girder - Google Patents
Cast-in-situ prestressed concrete box girder Download PDFInfo
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- CN219174982U CN219174982U CN202320268243.8U CN202320268243U CN219174982U CN 219174982 U CN219174982 U CN 219174982U CN 202320268243 U CN202320268243 U CN 202320268243U CN 219174982 U CN219174982 U CN 219174982U
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Abstract
The utility model provides a cast-in-situ prestressed concrete box girder, which comprises an I-shaped precast girder, wherein two precast girders are spliced to form a box girder, longitudinal stress tendons are pre-buried in the I-shaped precast girder, and reserved grooves which are transversely distributed are formed in the top and the bottom of the I-shaped precast girder. According to the utility model, the I-shaped precast beams are arranged, the top and the bottom of each I-shaped precast beam are provided with the reserved grooves which are arranged along the length direction, after the two I-shaped precast beams are hoisted, each reserved groove is connected through the transverse stress tendons, and then the single-chamber box beam can be formed after concrete is poured in the top and bottom areas between the two I-shaped precast beams.
Description
Technical Field
The utility model relates to the technical field of bridge box girders, in particular to a cast-in-situ prestressed concrete box girder.
Background
The existing common structures are a cast-in-situ prestressed concrete box girder and a steel box girder, the prestressed concrete box girder is usually a single box and single box or single box and multi-box structure, the cast-in-situ construction method is generally cast construction of a full framing in site, the full framing in a busy road section is difficult to erect, traffic is seriously affected, and the efficiency of cast-in-site solidification molding is greatly reduced due to the single box or the single box and multi-box structure.
Therefore, the utility model provides the cast-in-situ prestressed concrete box girder.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide a cast-in-situ prestressed concrete box girder so as to solve the problems in the prior art.
In order to achieve the above object, the present utility model is realized by the following technical scheme: the utility model provides a cast-in-place prestressed concrete box girder, includes the I-shaped precast beam, two constitute a box girder after the precast beam concatenation, the pre-buried longitudinal stress muscle that is equipped with in the I-shaped precast beam, transverse distribution's reservation groove has all been seted up to the top and the bottom of I-shaped precast beam, be provided with longitudinal stress muscle in the reservation groove, the quantity of reservation groove is a plurality of and arranges the distribution along the length direction of I-shaped precast beam, two I-shaped precast beam passes through transverse stress muscle connection, and the top between two I-shaped precast beams is regional and the reservation groove is cast in place district with the bottom.
Furthermore, a fixing plate is pre-buried at the bottom of the I-shaped precast beam, and a connecting hole is formed in the fixing plate.
Further, reinforcing ribs distributed along the length direction are fixedly arranged on the I-shaped precast beam web plate.
Furthermore, a plurality of connecting pipes distributed in a arrayed mode along the length direction are pre-buried at the top of the I-shaped precast beam, and the connecting pipes are communicated with the upper end and the lower end of the wage precast beam.
Furthermore, the connecting pipe is of an H-shaped pipe structure and is positioned in the web plate of the I-shaped precast beam.
Further, the longitudinal stress tendons and the transverse stress tendons are fixedly connected with the connecting pipes.
The utility model has the beneficial effects that: the utility model relates to a cast-in-situ prestressed concrete box girder, which comprises an I-shaped precast girder; a reserved groove; reinforcing ribs; longitudinal stress tendons; a fixing plate; a connection hole; a connecting pipe; transverse stress tendons.
The method comprises the steps of arranging the I-shaped precast beams, arranging the reserved grooves along the length direction at the top and the bottom of the I-shaped precast beams, connecting the reserved grooves through transverse stress tendons after hoisting the two I-shaped precast beams, and then pouring concrete in the top and bottom areas between the two I-shaped precast beams to form a single-chamber box beam.
Drawings
FIG. 1 is a schematic view of a cast-in-place prestressed concrete box girder in which two I-shaped precast beams are connected by transverse tendons;
FIG. 2 is a schematic view of the connection of longitudinal tendons and connecting pipes in a single I-shaped precast beam 1 in a cast-in-situ prestressed concrete box girder according to the present utility model;
in the figure: 1. an I-shaped precast beam; 11. a reserved groove; 12. reinforcing ribs; 2. longitudinal stress tendons; 3. a fixing plate; 31. a connection hole; 4. a connecting pipe; 5. transverse stress tendons.
Detailed Description
The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.
Referring to fig. 1 and 2, the present utility model provides a technical solution: the utility model provides a cast-in-place prestressed concrete box girder, including I-shaped precast beam 1, this I-shaped precast beam 1 is the prefabricated under the line, constitute a case roof beam after two I-shaped precast beam 1 concatenates, constitute a complete box girder after will prefabricating I-shaped precast beam 1 under the line, this kind of case roof beam structure greatly reduced cast-in-place efficiency, the pre-buried longitudinal stress muscle 2 that is equipped with in I-shaped precast beam 1, longitudinal stress muscle 2 is the screw steel in the I-shaped precast beam 1, when the prefabricated I-shaped precast beam 1 under the line, longitudinal stress muscle 2 pre-buried is in the concrete of pouring I-shaped precast beam 1 cavity, transverse distribution's reservation groove 11 has all been seted up at the top and the bottom of I-shaped precast beam 1, this reservation groove 11 both ends are uncovered, be provided with longitudinal stress muscle 2 in the reservation groove 11, specifically just that longitudinal stress muscle 2 can pass through reservation groove 11, when two I-shaped precast beam 1 concatenate, be used for overlap transverse stress muscle 5 in the reservation groove 11, the quantity is a plurality of and arrange and distribute along the length direction of I-shaped precast beam 1, two I-shaped precast beam 1 are connected through transverse stress muscle 5, two I-shaped precast beam 1 and two are cast longitudinal stress muscle 1 are followed to the prefabricated cavity of the length of the prefabricated beam 1 and are welded to the prefabricated cavity of the reservation groove 1, the prefabricated cavity of the connection is formed, the length of the prefabricated cavity is formed.
In this embodiment, the bottom of the i-beam 1 is pre-embedded with a fixing plate 3, a connecting hole 31 is formed in the fixing plate 3, a connecting rib is welded on the fixing plate 3, and the connecting hole 31 facilitates the connection between the i-beam 1 and an external suspension or support beam through bolts.
According to the embodiment, the top of the I-shaped precast beam 1 is embedded with a plurality of connecting pipes 4 distributed in an arrangement mode along the length direction, the connecting pipes 4 are communicated with the upper end and the lower end of the I-shaped precast beam 1, the connecting pipes 4 are convenient to hoist, the I-shaped precast beam 1 is hoisted by means of a crane after a hoisting rope passes through the connecting pipes 4, the connecting pipes 4 are of an H-shaped pipe structure and are located in a web plate of the I-shaped precast beam 1, and further longitudinal stress tendons 2 and transverse stress tendons 5 are fixedly connected with the connecting pipes 4, so that the hoisting strength of the I-shaped precast beam 1 can be greatly improved.
The manufacturing method of the box girder comprises the steps of firstly prefabricating an I-shaped precast girder 1 under a line, pre-burying a longitudinal stress rib 2, a fixed plate 3 and a connecting pipe 4 during prefabrication, and connecting the longitudinal stress ribs 2 with the reinforcing steel bars, wherein the connecting pipe 4 is welded and connected with the adjacent longitudinal stress ribs 2; after pouring, forming and curing, hoisting the two I-shaped precast beams 1 by using a crane, enabling the two I-shaped precast beams 1 to be placed at the same height and in parallel, using transverse stress tendons 5 to be lapped in reserved grooves 11 on the two I-shaped precast beams 1, then welding the transverse stress tendons 5 and the longitudinal stress tendons 2, then adding reinforcing steel bars among the plurality of transverse stress tendons 5, then constructing a pouring cavity, enabling the transverse stress tendons 5, the reinforcing steel bars and the reserved grooves 11 to be located in the pouring cavity, finally pouring concrete into the pouring cavity, and forming a single-chamber box beam after forming and curing.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (6)
1. The utility model provides a cast-in-place prestressed concrete box girder, its characterized in that includes I-shaped precast beam (1), two constitute a box girder after I-shaped precast beam (1) concatenation, pre-buried in I-shaped precast beam (1) is equipped with longitudinal stress muscle (2), transverse distribution's reservation groove (11) have all been seted up to the top and the bottom of I-shaped precast beam (1), be provided with longitudinal stress muscle (2) in reservation groove (11), the quantity of reservation groove (11) is a plurality of and arranges the distribution along the length direction of I-shaped precast beam (1), two I-shaped precast beam (1) are connected through transverse stress muscle (5), and the top and bottom region and reservation groove (11) between two I-shaped precast beams (1) are the cast-in-place district.
2. A cast in place prestressed concrete box girder according to claim 1, wherein: the bottom of the I-shaped precast beam (1) is embedded with a fixing plate (3), and the fixing plate (3) is provided with a connecting hole (31).
3. A cast in place prestressed concrete box girder according to claim 1, wherein: reinforcing ribs (12) distributed along the length direction are fixedly arranged on the web plate of the I-shaped precast beam (1).
4. A cast in place prestressed concrete box girder according to claim 1, wherein: the top of the I-shaped precast beam (1) is embedded with a plurality of connecting pipes (4) which are distributed along the length direction, and the connecting pipes (4) are communicated with the upper end and the lower end of the I-shaped precast beam (1).
5. A cast in place prestressed concrete box girder according to claim 4, wherein: the connecting pipe (4) is of an H-shaped pipe structure and is positioned in the web plate of the I-shaped precast beam (1).
6. A cast in place prestressed concrete box girder according to claim 5, wherein: the longitudinal stress tendons (2) and the transverse stress tendons (5) are fixedly connected with the connecting pipe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320268243.8U CN219174982U (en) | 2023-02-21 | 2023-02-21 | Cast-in-situ prestressed concrete box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320268243.8U CN219174982U (en) | 2023-02-21 | 2023-02-21 | Cast-in-situ prestressed concrete box girder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219174982U true CN219174982U (en) | 2023-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320268243.8U Active CN219174982U (en) | 2023-02-21 | 2023-02-21 | Cast-in-situ prestressed concrete box girder |
Country Status (1)
| Country | Link |
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| CN (1) | CN219174982U (en) |
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2023
- 2023-02-21 CN CN202320268243.8U patent/CN219174982U/en active Active
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