METHOD FOR CONSTRUCTING SUBTERRANEAN TUNNEL AND TUNNEL BY USING SHIELD MACHINE, AND SHIELD MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a technology for constructing a grade separation section which is an unprecedented underpass construction method, and can shorten a construction period with excellent efficiency.;SOLUTION: A tunnel is advanced through the ground by making the shield machine perform direct excavation from a ground surface, while correcting the direction and inclination of the shield machine 1. Thus, the tunnel three-dimensionally intersects the other-side existing route 17 or the other-side route 17 to be constructed in such a manner that an underpass is constructed; and even after that intersection, the shield machine 1 excavates an underground area toward the arrival-side ground surface positioned on the side opposite to the starting side in the traveling direction of the shield machine 1. The shape of the shield machine 1 is changed between the case of the excavation of the underground area and the case of the excavation of an area facing the ground section. During the excavation of the area facing the ground section, the shield machine has the shape suitable for earth retaining work. During the excavation of the underground area, the shape of the shield machine is changed into a shape suitable for original underground excavation by the shield machine from the shape suitable for the earth retaining work.;COPYRIGHT: (C)2007,JPO&INPIT