Prefabricated column and precast construction method thereof

Abstract

The invention relates to a prefabricated column and a precast construction method. The prefabricated column comprises a lower prefabricated column and an upper prefabricated column matching the lower prefabricated column, a first vertical steel bar extending out of the upper and lower ends of the lower prefabricated column is arranged in the lower prefabricated column, the lower end of the lower prefabricated column is provided with a first connection member, the upper end of the lower prefabricated column is provided with a first steel pipe and a first flange plate welded to the top surface of the first steel pipe, a second vertical steel bar extending out of the upper and lower ends of the upper prefabricated column is arranged in the upper prefabricated column, the upper end of the upper prefabricated column is provided with a second connection member, the lower end of the upper prefabricated column is provided with a second steel pipe and a second flange plate welded to the top surface of the second steel pipe, the top of a second pre-embedded steel pipe is in a butt connection relationship with two auxiliary steel pipes, the first flange plate and the second flange plate are in a butt connection relationship by bolts, the first connection member is connected to the second connection member by threads, and the first vertical steel bar and the second vertical steel bar are bound by stirrups. The prefabricated column can be constructed simply, has a low price, and is suitable for buildings having high floor height and large column sectional area.

Description

technical field [0001] The invention relates to a building prefabricated component and a prefabricated construction method thereof, in particular to a prefabricated column and a prefabricated construction method thereof, and belongs to the technical field of civil engineering. Background technique [0002] In order to improve production efficiency, reduce labor intensity, and improve the quality of building components, in the field of construction industrialization, the prefabrication of reinforced concrete building components, such as reinforced concrete prefabricated columns, reinforced concrete beams, and reinforced concrete prefabricated panels, is generally being studied. [0003] Among them, in terms of reinforced concrete prefabricated columns, the key technical difficulty that needs to be solved is the connection between the lower precast column and the upper precast column. At present, there are two solutions. The length of the upper precast column extends to a cert...

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Problems solved by technology

[0004]The key to the success of the first method lies in the quality of the steel bar connector and the high-strength rapid-hardening non-shrinkage cement mortar. The corresponding technical requirements are relatively high. The problem is that every Each vertical steel bar needs a steel bar connector, and needs to be grouted one by one, the production cost is high, the construction is more complicated, and the alignment requirements of the vertical steel bars and the steel bar connectors of the upper and lower precast columns are high and difficult. Especially when the section of the upper prefabricated column is reduced, it is even more so

[0005]The difficulty of the second method of construction is that at the beam-column connection node, where the steel bars are densely packed, the pre-embedded connectors of the prefabricated columns will make the In order to avoid the pre-embedded connectors of the precast columns, the beam longitudinal reinforcement at the node needs to bypass the beam-column joint, which increases the difficulty of processing the beam reinforcement and affects the anchoring effect of the beam reinforcement. On the other hand, in order to ensure that the upper precast column Beam-column connection nodes and corresponding floor slabs are kept plane stable during the construction phase, and the cross-section of the embedded connectors will be larger, and the connection of prefabricated column embedded connectors and vertical steel bars is in a high-altitude operation state, which is not safe. Inconvenient and low construction efficiency

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