A Construction Method for Demolition of Frame Beams in the Case of Completion of Superstructure Addition

Abstract

The invention discloses a construction method for dismantling frame beams when the superstructure addition is completed. The completed superstructure and the lower vertical structure are not completely connected, which includes the following steps: S1: all slabs and non-frame beams are removed ; S2: Divide the structural columns and the frame beams connected with them into n groups of beams and columns, and sort each group of beams and columns clockwise or counterclockwise according to the numbers 1 to 4, and the numbering of adjacent groups is sorted in the opposite way; S3: each group Simultaneous construction, the frame beams are removed in the order of 1 to 4 in the group, and the structural columns are interspersed to be reinforced to complete the construction. Aiming at the renovation and expansion project in which the dismantling of existing structural beams and slabs and the vertical connection of old and new structures are not completed before superstructure addition construction due to the influence of objective conditions, the present invention provides a method of constructing superstructure first and then dismantling existing frame beams The construction method not only speeds up the progress of the project, but also avoids structural instability caused by changes in the construction process of conventional reconstruction and expansion.

Description

technical field [0001] The invention relates to the demolition of reinforced concrete structures, in particular to a construction method for dismantling frame beams when the superstructure has been added but not fully connected with the lower vertical structure to reach the designed use state. Background technique [0002] With the rapid development of the modern construction industry, due to factors such as changes in use functions or the need for expansion, the number of renovation and expansion projects of old buildings is also increasing, and there are many projects that are difficult to successfully complete with existing conventional construction techniques. [0003] In traditional reconstruction and expansion projects, for the superstructure addition construction, the existing structural beams and slabs are generally removed first and the vertical connection and reinforcement of the old and new structures are completed, and then the new superstructure construction is c...

AI Technical Summary

Problems solved by technology

However, when the site construction conditions are restricted by the surrounding environment and the superstructure needs to be completed first, the demolition of the existing frame beams will affect the stability of the structure to a certain extent, and temporary measures such as erecting a full hall bent frame or adding diagonal bracing must be taken. To ensure its stability, it is not conducive to the deployment of the demolition construction operation surface, which increases the project cost and affects the project progress

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