CN220166643U - Prefabricated box girder for expressway - Google Patents
Prefabricated box girder for expressway Download PDFInfo
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- CN220166643U CN220166643U CN202321573360.1U CN202321573360U CN220166643U CN 220166643 U CN220166643 U CN 220166643U CN 202321573360 U CN202321573360 U CN 202321573360U CN 220166643 U CN220166643 U CN 220166643U
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- box girder
- support
- expressway
- fixedly connected
- girder
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- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000010276 construction Methods 0.000 abstract description 15
- 238000009434 installation Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 5
- 239000011150 reinforced concrete Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Abstract
The utility model discloses a prefabricated box girder for a expressway, which relates to the technical field of prefabricated box girders and solves the problem that in the process of hoisting the box girders, only a support is used for temporarily supporting the box girders, so that the stability of the box girders is poor. According to the utility model, through the arrangement of the auxiliary supporting piece, when the box girder is hoisted, the auxiliary supporting piece can be used for carrying out auxiliary supporting on the two sides of the box girder, so that the stability of the box girder can be improved, the installation and construction of the follow-up box girder are convenient, and the construction efficiency is improved.
Description
Technical Field
The utility model relates to the field of precast box girders, in particular to a precast box girder for a expressway.
Background
The box girder of the reinforced concrete structure is divided into a prefabricated box girder and a cast-in-situ box girder. The box girder combined bridge girder erection machine prefabricated in the independent place can be erected after the lower engineering is completed, so that the engineering progress can be accelerated, and the construction period can be saved; cast-in-situ box girders are mostly used for large continuous bridges. The materials are commonly divided into two types, namely a prestressed reinforced concrete box girder and a steel box girder. The prestressed reinforced concrete box girder is constructed on site, and besides longitudinal prestress, transverse prestress is arranged on some of the prestressed reinforced concrete box girders; the steel box girder is generally processed in a factory and then transported to a site for installation, and has an all-steel structure and also has a part of reinforced concrete pavement layers.
The prior Chinese patent with the publication number of CN112609584A discloses a prefabricated small box girder installation construction method for an intelligent expressway, which comprises the following steps of S6: mounting a support; before the support is installed, a support detection test is required to be carried out, and an engineer approves the support detection test result, and support purchase is carried out according to the support detection test result; the support is installed before the box girder is installed in place, and when the box girder at the discontinuous pier or the bridge abutment is installed, the stainless steel plate and the permanent support are firmly installed; when the continuous pier box girder is installed, a temporary support is installed in advance; s7: hoisting the box girder; the prefabricated box girder adopts a method of reserving hoisting holes on a panel to hoist the girder body, each side of the end part of the box girder is provided with 2 hoisting holes which are symmetrically arranged, and the rigging is connected with the box girder to be erected by penetrating the bottom of the hoisting holes; the crane lifts the box girder, performs alignment, and then slowly puts down the box girder in place; after the box girder is in place, checking whether a lower support is loose or not and whether the girder is stable or not; if the beam plate is not flat, the beam plate is lifted again, and the support is leveled by a stainless steel plate until the beam plate is stable; after the first box girder is erected, the box girders are erected in sequence according to the method until all the box girders of the span are erected.
With respect to the related art as described above, the inventors found that there are at least the following problems in this technology: in the process of hoisting the box girder, only the support temporarily supports the box girder, so that the stability of the box girder during installation is poor, the construction can be completed after the box girder is checked and confirmed for many times, and the construction efficiency is low.
Disclosure of Invention
In order to solve the problem that the stability of the box girder is poor when the box girder is installed because only the support is used for temporarily supporting the box girder in the process of hoisting the box girder, the utility model provides a prefabricated box girder for a expressway.
The utility model provides a prefabricated box girder for a expressway, which adopts the following technical scheme:
the prefabricated box girder comprises a box girder and a pier for installing the box girder, wherein a support is fixedly arranged at the top of the pier, and auxiliary supporting pieces are fixedly arranged at the two sides of the top of the pier, which are positioned on the support;
the auxiliary support piece comprises a base fixedly installed on the abutment and a screw rod rotatably installed on the base, a sliding seat is connected to the screw rod in a threaded mode, a support rod is hinged to the top of the sliding seat, a support plate is hinged to the upper end of the support rod, and the support plate is abutted to the outer side wall of the box girder.
Through adopting above-mentioned technical scheme, when hoist and mount case roof beam, put the case roof beam on the support, the auxiliary stay piece is used again and is carried out auxiliary stay to the both sides of case roof beam, can improve the stability of case roof beam, makes things convenient for the installation construction of follow-up case roof beam, improves the efficiency of construction.
Optionally, two reinforcing rods which are obliquely arranged are fixedly connected in the box girder.
By adopting the technical scheme, the main structure of the box girder can be reinforced.
Optionally, a positioning groove is formed in the top of the support, and a positioning block is fixedly connected to the bottom of the box girder.
Through adopting above-mentioned technical scheme, through the cooperation of locating piece and constant head tank, conveniently fix a position case roof beam bottom and support.
Optionally, a motor for driving the screw rod to rotate is fixedly arranged at the top of the base.
By adopting the technical scheme, the motor can be started to drive the screw rod to rotate.
Optionally, a guiding chute is provided at the top of the base, and the lower end of the sliding seat slides in the guiding chute.
By adopting the technical scheme, the sliding seat can be guided.
Optionally, a plug-in block is fixedly connected to one side of the supporting plate, and a plug-in groove matched with the plug-in block is formed in the outer side wall of the box girder.
Through adopting above-mentioned technical scheme, through the cooperation of grafting piece and spliced groove, conveniently connect the location with backup pad and case roof beam, can improve joint strength between backup pad and the case roof beam.
Optionally, a limiting block is fixedly connected to the outer side wall of the box girder.
Through adopting above-mentioned technical scheme, the stopper can play limiting displacement to the backup pad, if the side direction opposite force between backup pad and the case roof beam is too big, probably has the backup pad and takes place the condition of sliding relatively with the case roof beam, and the stopper can prevent that the backup pad from taking place to slide this moment, improves the security.
Optionally, the stopper is kept away from one side of backup pad fixedly connected with stiffening rib.
Through adopting above-mentioned technical scheme, can play the enhancement effect to the stopper.
In summary, the utility model has the following beneficial effects:
1. according to the utility model, through the arrangement of the auxiliary supporting piece, when the box girder is hoisted, the auxiliary supporting piece can be used for carrying out auxiliary supporting on the two sides of the box girder, so that the stability of the box girder can be improved, the installation and construction of the follow-up box girder are convenient, and the construction efficiency is improved;
2. according to the utility model, the screw is driven to rotate by the starting motor, so that the screw drives the sliding seat to move along the screw, the sliding seat drives the supporting plate to support the side wall of the box girder through the supporting rod, the use is more convenient, the labor is effectively saved, and the construction efficiency can be further improved.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
Fig. 2 is a schematic cross-sectional structure of the present utility model.
Reference numerals illustrate:
1. a box girder; 11. a reinforcing rod; 12. a positioning block; 13. a plug-in groove; 14. a limiting block; 15. reinforcing ribs; 2. a pier; 3. a support; 31. a positioning groove; 4. an auxiliary support; 41. a base; 42. a screw rod; 43. a slide; 44. a support rod; 45. a support plate; 46. a motor; 47. a guide chute; 48. and (5) plugging the blocks.
Detailed Description
The utility model is described in further detail below with reference to fig. 1-2.
Referring to fig. 1-2, a prefabricated box girder for a expressway includes a box girder 1 and a pier 2 for installing the box girder 1, wherein two reinforcing rods 11 are fixedly connected to the inside of the box girder 1 and are obliquely arranged, a support 3 is fixedly installed at the top of the pier 2, a positioning groove 31 is formed at the top of the support 3, and a positioning block 12 is fixedly connected to the bottom of the box girder 1. The bottom of the box girder 1 is conveniently positioned with the support 3 through the matching of the positioning block 12 and the positioning groove 31. The pier 2 top is located the equal fixed mounting of both sides of support 3 and has auxiliary stay piece 4, when hoist and mount case roof beam 1, puts case roof beam 1 to support 3 on, and auxiliary stay piece 4 is used again to the both sides of case roof beam 1 and is carried out auxiliary stay, can improve the stability of case roof beam 1, makes things convenient for the installation construction of follow-up case roof beam 1, improves the efficiency of construction.
Referring to fig. 1 and 2, the auxiliary support 4 includes a base 41 fixedly installed on the abutment 2 and a screw rod 42 rotatably installed on the base 41, a motor 46 for driving the screw rod 42 to rotate is fixedly installed at the top of the base 41, a sliding seat 43 is connected to the screw rod 42 in a threaded manner, a guide sliding groove 47 is formed in the top of the base 41, the lower end of the sliding seat 43 slides in the guide sliding groove 47, a supporting rod 44 is hinged to the top of the sliding seat 43, a supporting plate 45 is hinged to the upper end of the supporting rod 44, and the supporting plate 45 abuts against the outer side wall of the box girder 1. When the box girder 1 is used, the motor 46 can be started to drive the screw rod 42 to rotate, so that the screw rod 42 drives the sliding seat 43 to move along the screw rod 42, and the sliding seat 43 drives the supporting plate 45 to support the side wall of the box girder 1 through the supporting rod 44, so that the box girder 1 is more convenient to use.
Referring to fig. 2, a plugging block 48 is fixedly connected to one side of the supporting plate 45, a plugging groove 13 matched with the plugging block 48 is formed in the outer side wall of the box girder 1, and the supporting plate 45 and the box girder 1 are conveniently connected and positioned by matching the plugging block 48 with the plugging groove 13, so that the connection strength between the supporting plate 45 and the box girder 1 can be improved.
Referring to fig. 1 and 2, a limiting block 14 is fixedly connected to an outer sidewall of the box girder 1, a reinforcing rib 15 is fixedly connected to one side, away from the supporting plate 45, of the limiting block 14, the limiting block 14 can play a limiting role on the supporting plate 45, if lateral opposite acting force between the supporting plate 45 and the box girder 1 is too large, the situation that the supporting plate 45 and the box girder 1 slide relatively may exist, and at the moment, the limiting block 14 can prevent the supporting plate 45 from sliding, so that safety is improved.
The implementation principle of the utility model is as follows: when the box girder 1 is hoisted, the box girder 1 is placed on the support 3, and the auxiliary support pieces 4 are used for carrying out auxiliary support on the two sides of the box girder 1, so that the stability of the box girder 1 can be improved, the installation and construction of the follow-up box girder 1 are facilitated, and the construction efficiency is improved.
The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (8)
1. A prefabricated box girder for a highway, comprising a box girder (1) and a pier (2) for installing the box girder (1), characterized in that: the top of the abutment (2) is fixedly provided with a support (3), and auxiliary supporting pieces (4) are fixedly arranged on two sides of the support (3) at the top of the abutment (2);
the auxiliary support piece (4) comprises a base (41) fixedly installed on the abutment (2) and a screw rod (42) rotatably installed on the base (41), a sliding seat (43) is connected to the screw rod (42) in a threaded mode, a support rod (44) is hinged to the top of the sliding seat (43), a support plate (45) is hinged to the upper end of the support rod (44), and the support plate (45) is abutted to the outer side wall of the box girder (1).
2. A precast box girder for a expressway according to claim 1, wherein: two obliquely arranged reinforcing rods (11) are fixedly connected to the inside of the box girder (1).
3. A precast box girder for a expressway according to claim 1, wherein: the top of support (3) has seted up constant head tank (31), the bottom fixedly connected with locating piece (12) of case roof beam (1).
4. A precast box girder for a expressway according to claim 1, wherein: the top of the base (41) is fixedly provided with a motor (46) for driving the screw rod (42) to rotate.
5. A precast box girder for a expressway according to claim 1, wherein: the top of the base (41) is provided with a guide chute (47), and the lower end of the sliding seat (43) slides in the guide chute (47).
6. A precast box girder for a expressway according to claim 1, wherein: one side of the supporting plate (45) is fixedly connected with a plug-in block (48), and a plug-in groove (13) matched with the plug-in block (48) is formed in the outer side wall of the box girder (1).
7. A precast box girder for a expressway according to claim 1, wherein: and a limiting block (14) is fixedly connected to the outer side wall of the box girder (1).
8. A precast box girder for a expressway as claimed in claim 7, wherein: one side of the limiting block (14) far away from the supporting plate (45) is fixedly connected with a reinforcing rib (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321573360.1U CN220166643U (en) | 2023-06-19 | 2023-06-19 | Prefabricated box girder for expressway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321573360.1U CN220166643U (en) | 2023-06-19 | 2023-06-19 | Prefabricated box girder for expressway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220166643U true CN220166643U (en) | 2023-12-12 |
Family
ID=89053268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321573360.1U Active CN220166643U (en) | 2023-06-19 | 2023-06-19 | Prefabricated box girder for expressway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220166643U (en) |
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2023
- 2023-06-19 CN CN202321573360.1U patent/CN220166643U/en active Active
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