Corner vertical hole centralized arrangement and direct stress longitudinal bar connection overlapping column and construction technology

Abstract

The invention discloses a corner vertical hole centralized arrangement and direct stress longitudinal bar connection overlapping column and a construction technology. Sizing pipeline embedding is conducted, penetration vertical holes are formed in four corner parts of a prefabricated column, only construction longitudinal bars, auxiliary longitudinal bars, stirrups and tie bars are arranged in theprefabricated column, and no steel bars stretch out of the prefabricated column. In the construction site, column stress longitudinal bars are arranged in the corner vertical holes of the prefabricated column in a centralized manner, and upper-layer and lower-layer column stress longitudinal bars are directly connected at the root of the prefabricated column through a mechanical connection connector. After post pouring of concrete in pouring vertical holes, the overlapping column is formed by the prefabricated column and the post-pouring part to participate in structure stress. Sizing pipelines are manufactured through rolling and folding of a thin-wall steel plate. When the column section is large, a penetration pouring hole is formed in the middle portion of the section of the prefabricated column, stress longitudinal bars are not arranged in the prefabricated column, and the standard degree of a die and a steel bar cage is high; and the stress longitudinal bars are directly connected, connection is reliable, and cost is low; and conventional grouting construction does not exist on the site, the construction speed is high, and the quality is easy to guarantee.

Description

technical field [0001] The invention belongs to the technical field of buildings, and relates to a prefabricated column, in particular to a composite column with corner vertical holes centrally arranged and directly connected to stressed longitudinal reinforcements and a construction process thereof. Background technique [0002] At present, prefabricated concrete frame structures are widely used in prefabricated concrete public buildings in my country. The longitudinal reinforcement of prefabricated columns is mostly connected by sleeve grouting. In the production stage, the mold needs to be drilled, the standardization degree of the prefabricated column reinforcement cage is low, and the production efficiency is low; the longitudinal reinforcement is connected by sleeve grouting, which has problems such as difficulty in aligning the reinforcement, difficulty in controlling the quality of joint grouting, and poor construction feasibility in winter. It has aroused a series of ...

AI Technical Summary

Problems solved by technology

The lap connection will cause the plastic hinge of the column to move up under the earthquake, weaken the elastoplastic deformation capacity of the column, and easily form the short column effect

In addition, most of the existing hollow columns use core pulling or multiple prefabrication processes to form a hollow interior. The production process is complicated and there are many processes. It cannot be produced on a large number of existing flat die production lines in my country, and its promotion is restricted.

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