Construction method of concrete main body structure assembly type sliding steel stair

Abstract

The invention discloses a construction method of a concrete main body structure assembly type sliding steel stair. The construction method comprises the steps that 1, concrete structure brackets are constructed in the same period of concrete main body structure construction; 2, all components of the steel stair are prefabricated in a factory; and 3, the steel stair is installed in an assembly mode, 301, a sliding layer is constructed, 302, an L-shaped support plate is constructed, 303, two oppositely-arranged L-shaped steel stair beams are constructed, 304, a steel step lug plate is constructed, 305, a steel step is constructed, and 306, a buffer layer is constructed. According to the construction method, the concrete structure brackets are constructed in the same period of concrete main body structure construction, an installation foundation is provided for the steel stair, large components of the stair are divided into small components simple in structure, the small components are prefabricated in the factory and assembled into the steel stair on the construction site, the steel stair is used for a concrete main body structure, sliding supports are adopted at the two ends, the assumption that the rigidity of the stair is not considered in structural model calculation is met, and earthquake resistance is facilitated.

Description

technical field [0001] The invention belongs to the technical field of constructing steel stairs with a concrete main structure, and in particular relates to a construction method for an assembled sliding steel staircase with a concrete main structure. Background technique [0002] At present, the country promotes the form of prefabricated buildings and develops industrialized building models, which has spawned a large number of prefabricated technologies. Among them, stairs are an important force transmission and transportation component in buildings. In reinforced concrete structures, the current construction methods are mainly using Cast-in-place concrete with wooden or steel formwork, after a certain curing time, forms a cast-in-place reinforced concrete staircase after demoulding; or use factory prefabricated stairs, transported to the construction site for installation. [0003] The shortcoming and deficiency that existing method exists: [0004] First, the cast-in-pl...

AI Technical Summary

Problems solved by technology

[0004] First, the cast-in-place stairs cannot be assembled, and the assembly efficiency of the factory-fabricated stairs is too low to meet the needs of existing or future high-end technologies

[0005] Second, cast-in-place stairs require formwork, and it is difficult to support formwork for stairs, requiring large labor investment and high construction costs

[0006] Third, it does not meet the requirements of green buildings, which increases pollution and wastes resources. Once the stairs are formed, they cannot be reused, and a large amount of construction waste will be generated during reconstruction.

[0007] Fourth, the concrete structure is self-heavy, which increases the self-weight of the overall structure and makes construction inconvenient

[0008] Fifth, the actual project does not match the calculation model. There is a staircase stiffness in the actual project, but it is not considered in the main calculation model

[0009] Sixth, with the development of the times, new technologies emerge one after another, and the regulatory authorities and owners have higher and higher requirements for construction quality, cost, and technology. Complex, rigid, rough and backward technical methods are difficult to meet modern refinement and flexibility. New construction requirements will gradually be phased out

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