TUNNEL BORING CONSTRUCTION METHOD AND TUNNEL CONSTRUCTION SUPPORT DEVICE

摘要

PURPOSE: To further enhance construction safety and efficiency and obtain solid tunnel structure by applying a direct lining method which uses a movable lining form to a collapse natural ground. ;CONSTITUTION: A timbering space 33 is excavated in a preceding manner in the shape of a ditch along an inner peripheral edge of a tunnel, thereby forming a core sibsoil 2M which remains inside. Then, the stability of a cross section of a drift near a cutting face is attempted by driving in a frame 19 of a temporary receiving timbering device 5B in the timbering space and the core ground is cultivated and removed at one time. At the same with this, a side push plate 16 on the side of a centering 5A is pushed at a pit mouth of the tunnel, thereby forming a gable stopper and a lining space 15 directly nehind the frame 19 so that a lining 32 may be built up.;COPYRIGHT: (C)1994,JPO&Japio