Recyclable H-shaped steel, supporting structure and recovery method of H-shaped steel

Abstract

The invention discloses recoverable H-shaped steel, a supporting structure and a recovery method of the H-shaped steel. The recoverable H-shaped steel comprises an H-shaped steel part which is provided with a first flange, a second flange and a web plate located between the first flange and the second flange, wherein the first flange and the second flange are parallel to each other; a demolding coating which covers the outer surface of the steel part before recovery and is separated from the outer surface of the steel part during recovery; pulling hole plugs arranged on the web plate in pairs at certain intervals in the direction from the top end of the web plate to the bottom end of the web plate; and a bottom box piece which is arranged at the bottom end of the web plate and mounted at the bottom end of the web plate through a bolt.

Description

technical field [0001] Embodiments of the present disclosure generally relate to the technical field of green building construction, and more specifically, relate to a recyclable H-shaped steel, a support structure and a method for recycling the H-shaped steel. Background technique [0002] In recent years, with the rapid development of cities, the development of urban underground space has brought about the excavation and support of large-scale foundation pit engineering. Pile-anchor support structure system is often used in excavation of foundation pit engineering, and this support structure belongs to temporary support function. After the foundation of high-rise buildings is completed and the backfill soil is backfilled, the function of this temporary support structure will end immediately, so this A large number of steel bars in this temporary support structure have also become construction waste, and have a serious impact on the secondary development of the underground ...

AI Technical Summary

Problems solved by technology

But in this case, once the force-bearing mechanism at one end fails, the entire main reinforcement will be in a free state, and the support pile will completely lose the restraint of the main reinforcement, which will greatly reduce the bending resistance of the support pile.

[0004] In addition, during the process of inserting the existing detachable reinforcement cage into the concrete, due to the connection between the pipe and the vertical bar, the connection between the pipe and the anchor bar, and the connection between the stirrup and the pipe, there are many connections between the stirrup and the pipe, which is prone to grout leakage in the pipe, which leads to the reinforcement of the steel bar. The problem of not being able to recycle

Moreover, the erection bars and stirrups will slide and float up relative to the pipe, resulting in uneven distribution of the stirrups and erection bars, thus affecting the bending performance of the pile

Moreover, there are many processes in the processing and production of the existing detachable reinforcement cages, high production requirements, and high processing costs. Therefore, the existing concrete can be reinforced with reinforcement cages to support piles, and the production and recycling of the reinforcement cages are more complicated and costly. , which is unfavorable for promotion and application

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