The design of column removing and beam supporting technology is difficult,the construction is complex,and the safety risk in the construction process is high.Therefore,a complete design theory and construction technology of column removing and beam supporting has not yet been formed.Combined with the renovation project of a financial building,the practice of column removing and beam supporting is discussed.The building project plans to remove two frame columns.After the removal of the frame columns,according to the adjustment of the functional layout and the corresponding calculation results,new prestressed up-turning beams are adopted for reinforcement and reconstruction measures.Based on the analysis of implementation scheme comparison,feasibility demonstration and on-site monitoring verification,the simply supported up-turned prestressed transfer beam is finally verified to be a good method for this project,and the construction scheme of column removing and beam supporting is detailed.During the construction,the deformation of the monitoring point of the frame beam is between-4.6 mm and 2.5 mm.After the building is reconstructed,it can meet the predetermined normal function.The scheme can provide reference for the same type of projects.
关键词
钢筋混凝土结构/托梁拔柱/预应力/上翻转换/加固改造
Key words
reinforced concrete structure/column removing and beam supporting/prestressing/upward conversion/reinforcement and reconstruction
维普
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