Adjustable cast-in-place support platform for pouring steel-concrete composite beam cantilever top plate

Abstract

The invention discloses an adjustable cast-in-place support platform for pouring of a steel-concrete composite beam cantilever top plate. The adjustable cast-in-place support platform comprises a supporting mechanism, a driving mechanism installed on the supporting mechanism, a hanging mechanism installed on the driving mechanism and a spraying mechanism installed on the hanging mechanism. The supporting mechanism comprises a bailey cantilever beam. According to the method, the hoisted steel box girder serves as an acting point, and the supporting mechanism is installed on the steel box girder panel to bear all loads of the cantilever section; a safety channel is established under the mutual cooperation effect of the driving mechanism and the hanging mechanism, the operation safety of operators is guaranteed, and the elevation and the linetype of the hanging assembly are conveniently and flexibly adjusted through the lifting assembly. The spraying mechanism is used for conveniently spraying and curing the concrete of the cantilever section; therefore, a convenient, safe, fast and low-cost construction platform is created for construction of the steel-concrete composite beam cantilever top plate, and the construction platform is particularly suitable for pouring construction of the steel-concrete composite beam cantilever top plate at high altitude and across roads.

Description

technical field [0001] The invention relates to the technical field of construction of a steel-concrete composite beam cantilever roof, in particular to an adjustable cast-in-place support platform for pouring a steel-concrete composite beam cantilever roof. Background technique [0002] With the rapid development of steel structure technology in my country, steel-concrete composite bridges are widely used in new roads at this stage. Bridges with this type of structure have a series of advantages such as high rigidity, short construction period, high load-bearing performance, and good appearance quality, so they have been widely used at this stage. [0003] Steel box girder bridge decks often use C50 composite fiber concrete, and the concrete is a cantilever structure with a cantilever length of 1.5m-2.0m. This is a traditional construction method for complex environments such as bridges with limited clear heights and bridges spanning railways, rivers, and highways. The con...

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Problems solved by technology

[0005] 1. It is difficult to complete the construction by erecting a full-height bracket under the condition of limited bridge clearance;

[0006] 2. For the construction of cantilever roofs of steel-concrete composite beams across railways, rivers and highways, it is impossible or difficult to implement using the full hall support method;

[0007] 3. For the construction of the steel-concrete composite beam cantilever roof in the strong wind area, the safety risk of using the full hall support method is high, and the safety of the construction personnel cannot be guaranteed;

[0009] 5. When the bridge headroom is high, the erection of the full hall support cannot meet the requirements due to the large height-to-width ratio, and steel pipe supports are required, and the cost is greatly increased at this time;

[0010] 6. The triangular bracket method has great safety risks for the construction of cantilever roofs with multi-size large cantilever arc-shaped flange webs, a large amount of material input, stress concentration in the force, poor matching between brackets and beam webs, and extremely difficult installation;

[0011] 7. After the installation of the triangular bracket method is completed, the formwork height and line type cannot be flexibly adjusted according to the horizontal and longitudinal elevations of the box girder

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