CONSTRUCTION METHOD OF CELLAR FOR BUILDING COMPLETED

PROBLEM TO BE SOLVED: To provide a construction method of a cellar for a building completed.SOLUTION: The construction method includes: a step of making a plurality of holes and a slot pass through bottom concrete at the bottom part of the building completed so as to be communicated with the holes, inserting a support to the inside of the slot and making a stopper projected at the lower part of the support be engaged with the lower part of the slot to fix it; a step of providing a press-in machine on the upper part of the support; a step of inserting hollow piles to the respective holes, then pushing the piles into the underground using the press-in machine, stacking other piles on the pushed-in piles every time the piles are pushed in, then successively pushing them in by the press-in machine to support the underground structure of the building completed; a step of supporting the building completed by a column pushed into the underground and excavating the lower ground of the bottom concrete of the building in order to secure an underground space; and a step of placing concrete to the horizontal surface and vertical surface of the underground space secured by the step of excavating the lower ground of the concrete.