A constructing method of underground structure using steel pipe and segment

A construction method of an underground structure using steel pipes and segments are provided to perform construction work easily and to cut down the cost of reinforcement materials. A construction method of an underground structure using steel pipes and segments for forming an underground structure by press-fitting a segment to a lateral section of the ground using a hydraulic jack, and forming an underground structure by placing concrete in the segment comprises the steps of: forming a vertical shaft from the surface of the earth to a tunnel construction site; forming a frame of an underground structure by press-fitting steel pipes and segments in the vertical shaft to be connected laterally in a longitudinal direction using a hydraulic jack as a pres-fit device and removing earth from the inside of the steel pipe and the segment; penetrating a sheath pipe(5) fitted with a strand longitudinally to the segments in a horizontal direction, and binding two ends of the sheath pipe to an anchorage(9) fixed to the inside of the steel pipe located to two sides of the segment using regulation sheath; placing concrete(7) in the steel pipe and the segment and curing the concrete, and excavating the inside of the underground structure composed of a steel pipe and a segment; and finishing an internal wall of the underground structure with precast panels.