Concrete replacement construction method for high-rise frame columns based on active control technology

Abstract

The invention relates to a construction method for concrete replacement of high-rise frame columns based on active control technology. A steel bolt is inserted into a hole in the concrete frame column to be replaced, and one end of the steel brace is fixed to the steel pin, and the other end is installed on the beam plate and can be used. Sliding horizontally, the connection node II on both sides of the concrete frame column is set with tension prestressed tendons; install the vertical steel support on the floor where the concrete frame column is to be replaced, and the installation position corresponds to the position of the steel diagonal brace; install strain gauges, displacement monitoring points, Real-time monitoring of stress changes and structural deformation; through the tensioning and monitoring data of the prestressed tendons, the axial force of the steel support is actively controlled to realize the unloading of the axial force of the concrete frame column; Concrete strain gauge; after the concrete is cured until the strength meets the requirements, the steel support is removed and used for turnover to realize the replacement of high-rise frame column concrete. The invention realizes the active control of the axial force unloading of the concrete frame column through the real-time monitoring of construction.

Description

technical field [0001] The invention relates to a construction method for concrete replacement of high-rise frame columns, belonging to the technical field of building construction. Background technique [0002] Reinforced concrete structure is the most common structural form of high-rise buildings, and the strength of concrete columns directly affects building safety. However, in actual engineering, engineering quality accidents are prone to occur due to various factors, especially the strength of concrete. When the concrete strength grade differs greatly from the design requirements, the general treatment method is: remove all the concrete columns on unqualified floors and the buildings on the floors above, and completely rework. Although this method can make up for project quality problems, the economic loss is relatively large. Big. The other is to adopt various reinforcement measures such as enlarging the section reinforcement method, outsourcing steel reinforcement m...

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Problems solved by technology

And need to use professionals to operate jacks, etc.

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