SOME CONSTRUCTION EXPERIENCES IN CONSTRUCTION OF CONCRETE FILLED STEEL TUBULAR COLUMNS FOR DIHAO SUPER TALL BUILDING
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摘要: 上海华敏帝豪大厦是一座高235.1 m的60层综合大厦。框架柱采用矩形钢管混凝土柱,内灌自密实混凝土。为了提高施工工效,打破了CECS 203:2006《自密实混凝土应用技术规程》第7.3.7条浇筑混凝土时的最大自由落下高度宜在5 m以下的规定。采用了缩短导管,直接浇灌混凝土的方法,提高了工效。同时,对减少内隔板下面的气泡,采取有效措施,保证了工程质量。Abstract: Dihao Super Tall Building in Shanghai is a higher synthetically building.In which the rectangular concrete filled steel tubular columns are adopted as frame columns.The self-compacting concrete is used.The 7.3.7 item in Technical Specification Applied to Self-Compacting Concrete shows that stipulation of the free drop height of concrete is not over 5 m.And this stipulation is broken,a short leading pipe is used to pour concrete into steel tube,then the work efficiency is raised.As well as,some effective measures are adopted to decrease the air bubbles under partitions to guarantee the construction quality.
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CECS 203:2006自密实混凝土应用技术规程[S].
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