TWO-ARCH TUNNEL AND A CONSTRUCTION METHOD OF THE SAME, CAPABLE OF EASY DRAINAGE APPLYING A MAIN LINE TUNNEL PRECAST SEGMENT LINING

摘要

PURPOSE: A two-arch tunnel capable of easy drainage and a construction method of the same are provided to obtain an excellent leakage prevention effect and to prevent a precast segment concrete lining from being separated from a main line tunnel.;CONSTITUTION: A pilot tunnel is excavated(S10). A wall unit precast is manufactured in order to form a center wall and enter the center of the pilot tunnel(S20). A launching unit and a traction unit are formed so that the center wall and a precast segment concrete lining are drawn towards the pilot tunnel(S30). The center wall is formed by connecting and unitizing a precast, and the center wall is drawn along a rail unit(S40). The center wall is drawn along the pilot tunnel for connection, and a main line tunnel is excavated before a precast concrete lining is manufactured(S50). The precast segment concrete lining is drawn into the main line tunnel and is connected to the center wall(S60). The lower part of the main line tunnel is excavated, and a slab is placed and is paved(S70).;COPYRIGHT KIPO 2013;[Reference numerals] (S10) Step of excavating a pilot tunnel; (S20) Step of manufacturing a wall unit precast; (S30) Step of forming a launching unit and a traction unit; (S40) Step of drawing a center wall unit; (S50) Step of manufacturing a main line tunnel precast; (S60) Step of drawing a precast segment concrete lining; (S70) Step of finishing