Framework girder dismantling construction method under condition of upper structure building completion

Abstract

The invention discloses a framework girder dismantling construction method under the condition of upper structure building completion. A built upper structure and a lower vertical structure are not fully connected. The method comprises the following steps of S1, dismantling all plates and non-framework girders; S2, dividing structure columns and framework girders connected with the structure columns into n groups of girder columns, and clockwise or anticlockwise sorting each group of girder columns according to a sequence from No. 1 to No. 4, wherein the number sorting manners of every two adjacent groups are opposite; S3, synchronously constructing all the groups, dismantling the framework girders in the groups according to the sequence from No. 1 to No. 4, strengthening the structure columns alternately, and finishing construction. Aiming at unfinished reconstruction and extension projects of structure girder and plate dismantling and old and new structure vertical connection before upper structure building construction due to the influence of objective conditions, the invention provides the construction method for constructing the upper structure before dismantling the existing framework girders, so that the engineering schedule is accelerated, and meanwhile, the structure instability caused by conventional reorganization and expansion construction procedure change is avoided.

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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