COLUMN MEMBER FOR UNDERGROUND STRUCTURE

PURPOSE: To eliminate the walls from an underground space, and to expand the effective area of the floor. CONSTITUTION: In a column member 1 set in a space surrounded by wall members provided around an object underground space, and by walls constructed at the site, placing an interval, which supports the wall members; support garder members to compose an underground structure together with the walls; and slab members laid thereon; a hollow section formation to which a pile 5 driven in to the underground can be inserted is formed. A receiver 12 to load a garder member in the direction of the garder member at least in one direction is formed around the head 11 of the column member 1. And a slab reinforcing bar 14 to integrate with the floor slab of the underground structure is projected from the periphery of the leg 13 of the column member 1.