TOP DOWN METHOD FOR UNDERGROUND STRUCTURE USING THE CONCRETE BRACKET INTEGRATED STEEL BEAM

摘要

The present invention relates to a steel beam integrated with a concrete bracket which is coupled to a slurry wall forming an outer wall of an underground structure and a top-down construction method for the underground structure using the same. The steel beam of the present invention, which is coupled to the slurry wall forming the outer wall of the underground structure, comprises the steel beam and a concrete bracket which is coupled to one end of the steel beam. The concrete bracket comprises a box-shaped mold box surrounding a part of the end of the steel beam and having an opened upper surface and outer end surface, and concrete which the inside of the mold box is filled with.