DISCUSSION ON KEY TECHNIQUE FOR IMPROVEMENT OF TOPDOWN CONSTRUCTION METHOD EFFICIENCY

A high-rise general building clings to other building.Topdown construction method is adopted in the foundation construction.Construction technique is simplified through selection of economic and reasonable supporting and foundation forms;synchronous construction of overground structure and underground structure is realized through correct selection of number of the superstructure stories;innovative large space excavation mode is adopted to accelerate the excavation speed;vertical members and their node structure are carefully designed to reduce the labor intensity,shorten construction period and improve the construction efficiency of topdown construction method.