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升板法施工柱子的稳定问题,过去没有引起应有的重视,在设计上,柱子的断面一般部由使用与装吊要求来决定。对提升阶段只作提升第一块板时的稳定验算,认为楼板提升起来与柱子临时固定后,柱子的稳定性大大改善,所以对提升阶段的柱子稳定性注意不够,而工程实践证明,升板工程柱子稳定最不利阶段是在各层楼板升到设计位置而尚未永久固定的时候。因此在现实教训以后,我们比较重视这方面的问题,对每一个升板工程与现浇混凝土的木模支撑一样,都要对提升阶段柱子的稳度与强度进行验算,对设计上稳定性不足的柱子,在提升阶段就要采取适当的稳定措施来保证施工安全。去年八月份以来,从已经完成的0.4米×0.4米方柱,17米高度四层一万二千平方米土产仓库,0.45米×0.45米方柱,23.5米高度五层
The problem of stabilizing the construction of the rising slab has not been given due attention in the past. In terms of design, the general section of the column is determined by the requirements for use and loading. For the lifting stage, only the stability check for the first plate is raised. It is believed that the stability of the column is greatly improved after the floor slab is lifted up and the column is temporarily fixed. Therefore, attention is not paid to the column stability in the lifting stage, and engineering practice proves that the plate rises. The most unfavorable stage of engineering column stability is when the floors of each floor rise to the design position and have not been permanently fixed. Therefore, after the actual lessons learned, we pay more attention to this issue. As for the wooden form support of every riser project and cast-in-place concrete, the stability and strength of the column during the upgrade phase must be checked, and the design is not stable enough. Columns should take appropriate stabilization measures to ensure construction safety during the upgrade phase. Since August of last year, from the 0.4m by 0.4m square column that has been completed, the 17m high four-storey 12,000m2 indigenous storehouse, the 0.45m × 0.45m square column, the 23.5m height five storey