CN111519544A - Bridge flange plate construction formwork support system - Google Patents

Abstract

The invention discloses a bridge flange plate construction formwork supporting system. It includes a plurality of bearing structure along the vertical interval setting of bridge, characterized by: every bearing structure includes stand, bracket and lacing wire, the stand is vertical to be fixed at the bridge outer fringe and its lower extreme wears out the bridge outer fringe downwards, the bracket is H shaped steel, the one end of bracket with the stand wears out bridge outer fringe end fixed connection downwards, the other end of bracket is encorbelmented to the bridge outside, wherein one end of lacing wire with the end-to-end connection of the end of encorbelmenting of bracket, the other end of lacing wire with the upper end fixed connection of stand, bracket, lacing wire form the tripod. The invention can realize the quick mounting and dismounting of the support system and the template, solves the problem that the triangular bracket damages a steel beam web, improves the construction efficiency of the concrete template, and ensures the construction safety and the construction quality.

Description

A kind of bridge flange plate construction formwork support system

technical field

The invention relates to a formwork support system for bridge flange plate construction, which is used for cast-in-place concrete construction of a steel box girder flange plate, and belongs to the technical field of concrete formwork construction.

Background technique

The steel-concrete composite beam has good mechanical performance and good comprehensive economic benefits, and has a wide range of application prospects. Cast-in-place concrete for beam flange slabs is a common design point for common steel-concrete composite beams. Flange plate formwork engineering is one of the key processes in concrete construction. Currently, brackets or bracket support systems are mostly used. When the bracket support system is adopted, the material cost of the full-house bracket and the steel pipe column is high, the construction period is long, and the safety risk of erection and dismantling is high; while when the bracket support system is adopted, the triangular bracket needs to be welded on the side web of the steel box girder in advance. For the connecting piece, if the connecting piece is removed after the construction is completed, the steel box beam will be damaged. If it is not removed, the appearance will be affected. Moreover, the installation and removal of the entire triangular bracket is a high-altitude operation, which is cumbersome and has a high safety risk. Moreover, the web of steel box girder is not easy to be punched, the punching of the web will cause stress concentration at the hole position, which will lead to cracking. If it is welded directly on the web, the welding corbel will cause the secondary heating of the web, which will affect the appearance and also lead to cracking. It needs to be sanded again, as well as the overall painting, etc.

SUMMARY OF THE INVENTION

In view of the above-mentioned defects in the prior art, the present invention provides a formwork support system for bridge flange plate construction, which can realize the rapid installation and dismantling of the support system and the formwork, improve the construction efficiency of the concrete formwork, and the construction safety, and can avoid the need for steel beams. Web failure problem.

The present invention is realized through the following technical solutions: a bridge flange plate construction formwork support system, comprising several support structures arranged at intervals along the longitudinal direction of the bridge, characterized in that: each support structure includes a column, a bracket and a Tension, the column is vertically fixed on the outer edge of the bridge and its lower end penetrates downwards out of the outer edge of the bridge, the bracket is H-shaped steel, and one end of the bracket and the column penetrate downwards out of the outer edge of the bridge Fixed connection, the other end of the bracket cantilevered to the outside of the bridge, one end of the tie bar is connected to the end of the cantilevered end of the bracket, and the other end of the tie bar is fixedly connected to the upper end of the column , the upright column, the bracket and the tie bar form a tripod.

In the present invention, the columns, brackets and ties can form a stable tripod structure, which can carry a large load, and the tripod formed by the columns, brackets and ties can be stably connected to the bridge, which can effectively ensure construction safety. The invention does not need to punch holes at the position of the bridge web during installation, does not damage the bridge web structure, and does not affect the bridge construction quality. After the installation of the support system is completed, the bottom form and side form can be installed on the support system, the reinforcement bars are bound, and the concrete can be poured.

Further, in order to facilitate disassembly, the lower end of the column is provided with an external thread, and the bracket is detachably connected to the lower end of the column through a nut.

Further, in order to improve the structural strength of the support system, the tie bars are round steel.

Further, in order to improve the structural strength of the support system, the uprights are made of Φ25 finish-rolled rebar, and the tie bars are made of Φ12 round steel.

The beneficial effects of the present invention are as follows: the present invention is convenient for installation and disassembly, high in construction efficiency, short in cycle period of the formwork system, which can speed up the construction progress and shorten the construction period; The construction safety is improved; the construction of the invention does not need to punch holes in the web of the steel box girder, and does not damage the web of the steel box girder, which solves the problem that the triangular bracket is used to damage the web of the steel girder in the prior art, and does not affect the The appearance of the bridge and the construction quality are stable.

Description of drawings

Fig. 1 is the structural representation of the present invention in the specific embodiment;

In the figure, 1, column, 2, bracket, 3, tie bar, 4, flange plate, 5, steel box girder.

Detailed ways

The present invention will be further described below through non-limiting examples and in conjunction with the accompanying drawings:

As shown in the accompanying drawings, a bridge flange plate construction formwork support system includes several support structures arranged at intervals along the longitudinal direction of the bridge, and each support structure includes a column 1 , a bracket 2 and a tie bar 3 . The upright column 1 is vertically fixed on the outer edge of the steel box girder 5 , and its lower end penetrates downwardly out of the outer edge of the steel box girder 5 and is located at the lower part of the outer edge of the steel box girder 5 . The bracket 2 is H-shaped steel, and one end of the bracket 2 is fixedly connected with the outer edge end of the column 1 downwardly extending out of the steel box girder 5, and the other end of the bracket 2 cantilevers to the outside of the steel box girder. . One end of the tie bar 3 is fixedly connected to the end of the cantilevered end of the bracket 2 , and the other end of the tie bar 3 is fixedly connected to the upper end of the upright column 1 . The end of the cantilever end of the tie bar 3 and the bracket 2 and the upper end of the column 1 are all connected by welding. The column 1, the bracket 2 and the tie bar 3 are connected to form a tripod structure.

In order to improve the structural strength of the support system, it is preferable to use Φ12 round steel for the tie bars and Φ25 finish-rolled rebar for the uprights.

In order to facilitate installation and disassembly, the lower end of the column 1 is provided with external threads, the bracket 2 is provided with bolt holes, and the bracket 2 and the lower end of the column 1 are detachably connected by nuts.

When the present invention is installed, after the steel box girder is in place, the above-mentioned support structure is installed along the longitudinal direction of the bridge according to the design requirements. The longitudinal spacing of the brackets is 1m. After the installation of the support system is completed, the bottom form and the side form can be installed on the support system, steel bars are bound, concrete is poured, and the construction of the bridge flange plate 4 is completed. After the construction is completed, the present invention can be dismantled.

The invention can realize the quick installation and dismantling of the support system and the formwork, solve the problem of damage to the web of the steel beam when the triangular bracket is used as the support in the prior art, improve the construction efficiency of the concrete formwork, and ensure the construction safety and construction quality. The invention is especially suitable for the construction of the concrete flange plate of the steel-concrete composite beam.

Other parts in this embodiment are in the prior art, and will not be repeated here.

Claims (4)

1. The utility model provides a bridge flange plate construction formwork support system, includes a plurality of bearing structure, characterized by that along the vertical interval setting of bridge: every bearing structure includes stand (1), bracket (2) and lacing wire (3), stand (1) is vertical to be fixed at the bridge outer fringe and its lower extreme wears out the bridge outer fringe downwards, bracket (2) are H shaped steel, the one end of bracket (2) with stand (1) wears out bridge outer fringe end fixed connection downwards, the other end of bracket (2) is encorbelmented to the bridge outside, wherein one end of lacing wire (3) with the end-to-end connection of the end of encorbelmenting of bracket (2), the other end of lacing wire (3) with the upper end fixed connection of stand (1), bracket (2), lacing wire (3) form the tripod.

2. The bridge flange plate construction formwork support system of claim 1, wherein: the lower end of the upright post (1) is provided with an external thread, and the bracket (2) is detachably connected with the lower end of the upright post (1) through a nut.

3. The bridge flange plate construction formwork support system of claim 1, wherein: the lacing wire (3) is round steel.

4. The bridge flange plate construction formwork support system of claim 1, 2 or 3, wherein: the upright post (1) is phi 25 finish-rolled deformed steel bar, and the lacing wire (3) is phi 12 round steel bar.

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