CN219255980U - Fixing device for prefabricated box girder inner mold - Google Patents
Fixing device for prefabricated box girder inner mold Download PDFInfo
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- CN219255980U CN219255980U CN202121137409.XU CN202121137409U CN219255980U CN 219255980 U CN219255980 U CN 219255980U CN 202121137409 U CN202121137409 U CN 202121137409U CN 219255980 U CN219255980 U CN 219255980U
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- box girder
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- inner die
- pedestal
- pull rod
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Abstract
The utility model belongs to the field of bridge construction, and relates to a prefabricated box girder inner die fixing device which comprises an inner die and an outer die, wherein the inner die is arranged in the outer die, a box girder is poured between the inner die and the outer die, the bottom of the outer die is connected with a pedestal, the pedestal is arranged at the bottom of the pedestal, the pedestal is connected with one end of a pull rod through a fastening nut II, the other end of the pull rod penetrates through the pedestal, the outer die and the inner die from bottom to top in sequence and is connected with a pressing bar, the pull rod is connected with the pressing bar through the fastening nut I, the pressing bar is arranged on the upper surface of a lower arm of the inner die, and a sleeve is further arranged on the periphery of the pull rod between the inner die and the outer die. The utility model can prevent the floating of the box girder inner mold, and has the advantages of light overall weight, simple operation, convenient use, high installation efficiency, high strength and difficult deformation.
Description
Technical Field
The utility model relates to a prefabricated box girder internal mold fixing device, and belongs to the field of bridge construction.
Background
The box girder is one of the girder plates in bridge engineering, the inside is hollow, flanges are arranged on two sides of the upper part, and the box girder is similar to a box, thus obtaining the name. The prefabricated box girder is an upper structure form commonly used in bridge engineering, the prefabricated box girder is generally prefabricated in a prefabricated girder field, a pedestal is firstly arranged before the prefabricated box girder, then reinforcement processing, inner die and outer die installation are carried out, finally concrete is poured, and the slump of the concrete is generally 160-200mm. In the process of pouring concrete, the box girder inner mold is easy to float up due to the lateral pressure of the concrete, so that the thickness of a box girder top plate is reduced, and a disqualified box girder is formed. In the prior art, a back pressure bar and a split heads are generally used above the box girder inner die to carry out back pressure, the box girder inner die is prevented from floating upwards, the back pressure bar and the split heads generally traverse the section of a box girder top plate, the back pressure bar generally adopts I-steel with the width of 200mm, and the split heads generally adopt screw-thread steel with the specification of M28. When in use, the back pressure bar is fixed above the split heads, back pressure is carried out on the box girder internal mold, one back pressure bar is generally arranged every two meters, the weight of each back pressure bar and the split heads is about 80kg, the dead weight is large, the split heads are heavy, and a plurality of workers are required to be matched and installed during operation; the length of the back pressure bar and the split heads is large, so that the transverse span is large, the back pressure bar and the split heads are easy to deform after being repeatedly used for many times, and the inner die is easy to float upwards when being used again after deformation, so that the thickness of the top plate of the box girder is influenced; the contact surface of the split heads and the internal mold is small, the internal mold is easy to be locally rugged due to repeated use, the mold is difficult to disassemble, the split heads are difficult to maintain after deformation, and the investment is large at one time; taking 1 piece of box girder with the length of 25 meters as an example, about 12 counter pressure bars and split heads are needed, the total weight is about 1000kg, the installation of 1 piece of box girder with the length of 25 meters takes about 1.5 hours, the labor intensity is high, and the working efficiency is low.
Disclosure of Invention
The utility model aims to solve the technical problems that: overcomes the defects of the prior art, and provides a prefabricated box girder internal mold fixing device which can prevent the box girder internal mold from floating upwards, and has the advantages of light overall weight, simple operation, convenient use, high installation efficiency, high strength and difficult deformation.
The utility model discloses a prefabricated box girder inner die fixing device which comprises an inner die and an outer die, wherein the inner die is arranged in the outer die, a box girder is poured between the inner die and the outer die, the bottom of the outer die is connected with a pedestal, the pedestal is provided with the bottom of the pedestal, the pedestal is connected with one end of a pull rod through a fastening nut II, the other end of the pull rod penetrates through the pedestal, the outer die and the inner die from bottom to top in sequence and is connected with a pressing bar, the pull rod is connected with the pressing bar through the fastening nut I, the pressing bar is arranged on the upper surface of a lower arm of the inner die, and a sleeve is further arranged on the periphery of the pull rod between the inner die and the outer die.
Before prefabricating the case roof beam, at first fix the base in the pedestal bottom, and the mounting hole of the fastening nut second of base just to the preformed hole on pedestal and the external mold, if the base material is steel, can be connected base and pedestal through the welding, if the base material is concrete, can be connected base and pedestal through pre-buried mode. When the installation of the box girder steel bar is finished, the corresponding serial numbers of the inner die and the outer die are ensured to be consistent when the installation of the box girder inner die is carried out, the situation that the reserved hole position of the inner die is not corresponding to the installation hole position of the fastening nut II of the base is avoided, one end of the lower part of the pull rod sequentially passes through the inner die, the outer die and the pedestal and then is screwed with the fastening nut II of the base, the sleeve is sleeved into the pull rod and is moved to the position between the inner die and the outer die, then the pressing bar is penetrated into the pull rod, and the fixed pressing bar is screwed and fastened with the pull rod through the fastening nut I, so that the installation of the box girder steel bar is finished. Through this mode with the whole case roof beam bottom of being fixed in of centre form, prevent that the centre form from floating effectually, the tensioning passes through the stiffening rib transmission of centre form and the centre form is difficult for warping, and easy operation, installation effectiveness is high.
Preferably, the base comprises two first channel steel, a second fastening nut is arranged between the two first channel steel, and the second fastening nut is welded with the two first channel steel respectively. The two channel steel I are oppositely arranged in parallel, the channel steel I has the specification of 10# (100 x48x5.3 mm) and the length of 500mm-800mm.
Preferably, the sleeve is a high-strength PVC pipe. The sleeve can be of diameter
Is a high strength PVC pipe.
Preferably, the pull rod is made of finish rolled deformed steel bar. The pull rod can be made of finish rolled deformed steel bar with the specification of M25.
Preferably, the pressing bar adopts a channel steel II, the outer surface of the lower arm of the groove of the pressing bar is contacted with the inner die, so that the contact area between the pressing bar and the inner die is large, and the deformation of the inner die caused by repeated use of the pressing bar is avoided; channel steel II has the specification of 10# (100 x48x5.3 mm) and the length of 300mm-400mm.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model has reasonable structural design, the base is fixedly connected with the pedestal, the pull rod sequentially passes through the inner die, the outer die and the pedestal, one end of the pull rod is fixedly connected with the base through the fastening nut II, the other end of the pull rod is fixedly connected with the pressing bar through the nut II, the inner die is effectively prevented from floating upwards, the operation is simple, the use is convenient, the installation efficiency is high, only one worker is required during the operation, and the installation efficiency is high;
2. the utility model integrally fixes the inner die at the bottom of the box girder, has good effect of preventing the inner die from floating upwards, transmits tension through the reinforcing rib of the inner die of the box girder and is not easy to deform.
3. The pull rod, the pressing bar and the fastening nut I can be detached and can be reused, the pressing bar adopts the channel steel II, the strength is high, the pressing bar is not easy to deform, and the pressing bar can be reused.
4. The box girder counter-pressure device is low in investment, light in weight, low in labor intensity and high in working efficiency.
Drawings
FIG. 1 is a schematic structural view of an internal mold fixing device of a precast box girder;
FIG. 2 is an enlarged schematic view of the prefabricated box girder internal mold fixing device with the box girder and the pedestal structure removed.
In the figure: 1. pressing a bar; 2. fastening a first nut; 3. a pull rod; 4. a sleeve; 5. fastening a second nut; 6. a base; 7. a pedestal; 8. an inner mold; 9. an outer mold; 10. and a box girder.
Detailed Description
The utility model is further described below with reference to the accompanying drawings:
as shown in fig. 1-2, the prefabricated box girder internal mold fixing device comprises an internal mold 8 and an external mold 9, wherein the internal mold 8 is arranged in the external mold 9, a box girder 10 is poured between the internal mold 8 and the external mold 9, the bottom of the external mold 9 is connected with a pedestal 7, the pedestal 6 is arranged at the bottom of the pedestal 7, the pedestal 6 is connected with one end of a pull rod 3 through a fastening nut II 5, one other end of the pull rod 3 sequentially penetrates through the pedestal 7, the external mold 9 and the internal mold 8 from bottom to top and is connected with a pressing bar 1, the pull rod 3 is connected with the pressing bar 1 through the fastening nut I2, the pressing bar 1 is arranged on the upper surface of the lower arm of the internal mold 8, and a sleeve 4 is further arranged on the periphery of the pull rod 3 between the internal mold 8 and the external mold 9.
In this embodiment:
taking the example of the installation of 1 piece of box girder 10 with the length of 25 meters as an example:
the base 6 comprises two first channel steel, a second fastening nut 5 is arranged between the two first channel steel, and the second fastening nut 5 and the first channel steel are welded respectively. The two channel steel I are oppositely arranged in parallel, the channel steel I has the specification of 10# (100 x48x5.3 mm) and the length of 500mm-800mm.
The sleeve 4 is a high-strength PVC pipe. The sleeve 4 may be of diameter
Is a high strength PVC pipe.
The tie rod 3 is made of finish rolled deformed steel bar. The tie rod 3 can be made of finish rolled deformed steel bar with the specification of M25.
The pressing bar 1 adopts the channel steel II, the outer surface of the lower arm of the groove of the pressing bar 1 is contacted with the inner die 8, so that the contact area between the pressing bar 1 and the inner die 8 is large, and the deformation of the inner die 8 caused by repeated use of the pressing bar is avoided; channel steel II has the specification of 10# (100 x48x5.3 mm) and the length of 300mm-400mm.
In the concrete working process, before prefabricating the box girder 10, 7 bases 6 are fixed at the bottom of a pedestal 7, the distance between every two adjacent bases 6 is 3-4 meters, the mounting holes of the second fastening nuts 5 of the bases 6 are opposite to the preformed holes on the pedestal 7 and the outer mold 9, if the bases 6 are made of steel, the bases 6 and the pedestal 7 can be connected through welding, and if the bases 6 are made of concrete, the bases 6 and the pedestal 7 can be connected through a pre-buried mode; and then after the installation of the steel bars of the box girder 10 is completed, the installation of the inner die 8 of the box girder 10 is carried out, the corresponding serial numbers of the inner die 8 and the outer die 9 are ensured to be consistent, the situation that the position of a reserved hole of the inner die 8 is not corresponding to the position of an installation hole of a fastening nut II 5 of a base 6 is avoided, one end of the lower part of a pull rod 3 sequentially passes through the inner die 8, the outer die 9 and a pedestal 7 and then is screwed with the fastening nut II 5 of the base 6, a sleeve 4 is sleeved into the pull rod 3 and is moved to a position between the inner die 8 and the outer die 9, then a pressing bar 1 is penetrated into the pull rod 3, the fixing pressing bar 1 is screwed with the pull rod 3 through the fastening nut I2, when the concrete box girder 10 is poured, the connection of the box girder 10 is required to be removed, the fastening nut I is unscrewed, the lower part of the pull rod 3 is taken out from the pull rod 3, and the connection of the fastening nut II 5 is loosened, and the connection of the box girder 10 is removed.
The utility model is used as a pressure generating device by only 7 pieces of box girders 10 with the length of 25 meters, the weight is about 100kg, the investment is less, the weight is light, the labor intensity of workers is reduced, and the working efficiency is improved.
Claims (3)
1. The utility model provides a precast box girder internal mold fixing device, its characterized in that includes centre form (8) and external mold (9), and centre form (8) set up in external mold (9), pour box girder (10) between centre form (8) and external mold (9), pedestal (7), its characterized in that are connected to external mold (9) bottom: the novel die comprises a die, a pressing rod (1) and a sleeve, and is characterized by further comprising a base (6), wherein the base (6) is arranged at the bottom of the base (7), the base (6) is connected with one end of the pulling rod (3) through a fastening nut II (5), one other end of the pulling rod (3) sequentially penetrates through the base (7), the outer die (9) and the inner die (8) from bottom to top, the pulling rod (3) is connected with the pressing rod (1) through a fastening nut I (2), the pressing rod (1) is arranged on the upper surface of the lower arm of the inner die (8), and the periphery of the pulling rod (3) between the inner die (8) and the outer die (9) is also provided with the sleeve (4);
the base (6) comprises two first channel steel, a second fastening nut (5) is arranged between the two first channel steel, and the second fastening nut (5) is welded with the two first channel steel respectively;
the length of the first channel steel is 500-800 mm, and the length of the second channel steel is 300-400 mm;
the pressing bar (1) adopts a channel steel II, and the outer surface of the lower arm of the groove of the pressing bar (1) is contacted with the inner die (8).
2. The precast box girder internal mold fixing device according to claim 1, wherein the sleeve (4) adopts a high-strength PVC pipe.
3. The prefabricated box girder internal mold fixing device according to claim 1, wherein the tie rod (3) is made of finish rolled deformed steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121137409.XU CN219255980U (en) | 2021-05-25 | 2021-05-25 | Fixing device for prefabricated box girder inner mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121137409.XU CN219255980U (en) | 2021-05-25 | 2021-05-25 | Fixing device for prefabricated box girder inner mold |
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| Publication Number | Publication Date |
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| CN219255980U true CN219255980U (en) | 2023-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121137409.XU Active CN219255980U (en) | 2021-05-25 | 2021-05-25 | Fixing device for prefabricated box girder inner mold |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110466042A (en) * | 2019-09-19 | 2019-11-19 | 山东高速城投绕城高速公路有限公司 | A kind of fixed device of prefabricated box girder inner formwork and fixed setting method |
-
2021
- 2021-05-25 CN CN202121137409.XU patent/CN219255980U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110466042A (en) * | 2019-09-19 | 2019-11-19 | 山东高速城投绕城高速公路有限公司 | A kind of fixed device of prefabricated box girder inner formwork and fixed setting method |
| CN110466042B (en) * | 2019-09-19 | 2024-03-15 | 山东高速城投绕城高速公路有限公司 | Fixing device and fixing installation method for prefabricated box girder inner mold |
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