SOME CONSTRUCTION EXPERIENCES IN CONSTRUCTION OF CONCRETE FILLED STEEL TUBULAR COLUMNS FOR DIHAO SUPER TALL BUILDING

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.