CN215164796U - A nose girder mounting structure for steel box girder top pushes away construction - Google Patents
A nose girder mounting structure for steel box girder top pushes away construction Download PDFInfo
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- CN215164796U CN215164796U CN202120686457.8U CN202120686457U CN215164796U CN 215164796 U CN215164796 U CN 215164796U CN 202120686457 U CN202120686457 U CN 202120686457U CN 215164796 U CN215164796 U CN 215164796U
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- steel box
- reinforcing
- girder
- box girder
- guide beam
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Abstract
The utility model provides a nose girder mounting structure for steel box girder top pushes away construction, nose girder rear end and steel box girder front end welding to nose girder rear end and steel box girder front end top both sides are along vertically welding two at least reinforcing apparatus respectively, every reinforcing apparatus includes two vertical settings and the gusset plate that is parallel to each other, a bayonet socket is seted up to the bottom in the centre of every gusset plate, a connecting plate is welded respectively to the both sides of two gusset plates, a shaped steel gusset beam alternates in nose socket of each reinforcing apparatus with one side of nose girder and steel box girder. When the guide beam is installed and constructed, the reinforcing device is used for initially fixing the guide beam, then welding construction of the guide beam and the steel box girder is carried out, a support does not need to be erected, cost can be saved, and installation speed is accelerated. The reinforcing device and the welding structure are stressed together, and the connection reliability of the guide beam and the steel box girder can be improved.
Description
Technical Field
The utility model belongs to steel structure bridge construction field relates to an adopt top pushing method installation steel case roof beam time, the mounting structure of steel case roof beam front end nose girder.
Background
The steel box girder is usually installed by adopting a pushing method when the steel structure bridge spans a river channel or a road, namely, the steel box girder is assembled on a land support in advance, a temporary support pier is arranged as a pushing pier, and the steel box girder is pushed along a guide rail and slides to an installation position. In order to reduce the bending moment and deformation of the steel box girder in the pushing process, a steel guide girder with a certain length is usually arranged at the front end of the steel box girder. At present, a steel guide beam is usually installed by adopting a support method in construction, the guide beam is supported by a support, and the rear end of the guide beam is welded with the front end of a steel box girder. The cost for building the support is high, and the construction progress is also influenced; in addition, because the steel guide beam is of a cantilever structure, the stress of the welding position of the steel guide beam and the steel box beam is large, the welding seam is easy to crack due to infirm welding, and certain construction risk is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned problem, provide a modified nose girder mounting structure, reduce construction cost for the construction progress to guarantee that the nose girder can reliably be connected with the steel box girder, guarantee to push away construction safety.
The utility model provides a pair of a nose girder mounting structure for steel box girder top pushes away construction, nose girder rear end and steel box girder front end welding, its characterized in that: at least two reinforcing devices are respectively welded at the rear end of the guide beam and two sides of the top of the front end of the steel box beam along the longitudinal direction, each reinforcing device comprises two vertically arranged reinforcing plates which are parallel to each other, a bayonet is arranged from the middle to the bottom of each reinforcing plate, two sides of the two reinforcing plates are respectively welded with a connecting plate, and the bottom edges of the reinforcing plates and the connecting plates are welded with the steel box beam or the guide beam; and a reinforcing beam made of steel is inserted into the bayonet of each reinforcing device on the same side of the guide beam and the steel box beam.
The utility model adds the reinforcing device on the basis of welding the guide beam and the steel box girder, which can increase the connection reliability of the guide beam and the steel box girder; when the guide beam is installed and constructed, the reinforcing device is used for initially fixing the guide beam, then welding construction of the guide beam and the steel box girder is carried out, a support does not need to be erected, cost can be saved, and installation speed is accelerated.
Drawings
Fig. 1 is an elevation view of a guide beam mounting structure of the present invention;
fig. 2 is a plan view of the guide beam mounting structure of the present invention;
FIG. 3 is an elevational view of the reinforcement device;
fig. 4 is a plan view of the reinforcing apparatus.
Detailed Description
As shown in fig. 1, fig. 2, fig. 3, fig. 4, the utility model provides a pair of a nose girder mounting structure for steel box girder top pushes away construction, 1 rear end of nose girder and the welding of 2 front ends of steel box girder, 1 rear end of nose girder and 2 front end top both sides of steel box girder along vertically welding two at least reinforcing apparatus 3 respectively. Each reinforcing device 3 comprises two vertically arranged and mutually parallel reinforcing plates 31, a bayonet 32 is arranged from the middle to the bottom of each reinforcing plate, two sides of each reinforcing plate are respectively welded with a connecting plate 33, and the bottom edges of the reinforcing plates and the connecting plates are welded with a steel box girder or a guide girder; a reinforcing beam 4 made of steel bars is inserted into the bayonets 32 of the reinforcing devices on the same side of the guide beam and the steel box beam.
According to the structure, the reinforcing device 3 and the welding parts of the guide beam and the steel box girder are stressed together, downwarping of the guide beam can be effectively resisted, the structural firmness of the welding seam is ensured, and the construction safety in the subsequent pushing process is ensured.
The guide beam mounting structure for the incremental launching construction of the steel box beam comprises the following specific construction methods:
(1) at least two reinforcing devices are welded on two sides of the guide beam and two sides of the steel box beam in advance respectively, each reinforcing device comprises two vertically arranged reinforcing plates which are parallel to each other, a bayonet is arranged from the middle to the bottom of each reinforcing plate, two sides of the two reinforcing plates are welded with a connecting plate respectively, and the bottom edges of the reinforcing plates and the connecting plates are welded with the steel box beam or the guide beam;
(2) after the steel box girder is installed on the pushing piers, a crane is used for lifting the guide beam to the front of the steel box girder, the rear end of the guide beam is aligned with the front end of the steel box girder, and a reinforcing beam made of section steel is inserted into a bayonet of each reinforcing device on the same side of the guide beam and the steel box girder;
(3) and after the welding is finished, the reinforcing structure and the welding structure bear force together, so that the guide beam and the steel box girder are reliably connected.
Claims (1)
1. The utility model provides a nose girder mounting structure for steel box girder top pushes away construction, nose girder rear end and steel box girder front end welding, its characterized in that: at least two reinforcing devices are respectively welded at the rear end of the guide beam and two sides of the top of the front end of the steel box beam along the longitudinal direction, each reinforcing device comprises two vertically arranged reinforcing plates which are parallel to each other, a bayonet is arranged from the middle to the bottom of each reinforcing plate, two sides of the two reinforcing plates are respectively welded with a connecting plate, and the bottom edges of the reinforcing plates and the connecting plates are welded with the steel box beam or the guide beam; and a reinforcing beam made of steel is inserted into the bayonet of each reinforcing device on the same side of the guide beam and the steel box beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120686457.8U CN215164796U (en) | 2021-04-03 | 2021-04-03 | A nose girder mounting structure for steel box girder top pushes away construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120686457.8U CN215164796U (en) | 2021-04-03 | 2021-04-03 | A nose girder mounting structure for steel box girder top pushes away construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215164796U true CN215164796U (en) | 2021-12-14 |
Family
ID=79358504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120686457.8U Active CN215164796U (en) | 2021-04-03 | 2021-04-03 | A nose girder mounting structure for steel box girder top pushes away construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215164796U (en) |
-
2021
- 2021-04-03 CN CN202120686457.8U patent/CN215164796U/en active Active
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