EXISTING CONCRETE COLUMN PROVIDED WITH PERFORATED JOINT AND THE CONSTRUCTION METHOD FOR UNDERGROUND BUILDING THEREOF

摘要

PURPOSE: An existing concrete column provided with a perforated joint is provided to prevent the deflection of a beam caused by concentrated load and to reduce the cost of materials and labor costs by shortening a period of construction. CONSTITUTION: The existing concrete column(1) provided with a perforated joint comprises a lower plate(2) supported on the bottom, a vertical support(3) attached on the top of the lower plate(2) and extended upward, and a perforated connector(5) composed of reinforced posts(13) and formed on a joint where intermediate beams of the vertical support(3) are coupled to support the intermediate beams.