ERECTOR DEVICE USED FOR METHOD OF BORING CIRCUMFERENTIALLY ENLARGED TUNNEL

摘要

PROBLEM TO BE SOLVED: To provide an erector device which enables the supply and assembling of segments even in a restricted space and optimum for a method of boring a circumferentially enlarged tunnel.;SOLUTION: This erector device 30 used for a method of boring a circumferentially enlarged tunnel comprises a circumferential tunnel boring machine 1 having a vehicle 32 towed by a towing winch 25 and an erector 33 installed in the front part of the vehicle. The vehicle comprises wheels 35 allowed to roll by the towing winch on a longitudinal rail 34 laid down on existing segments S and wheels 37 allowed to roll by towing winches 38a, 38b installed on the existing segments on a lateral rail 36 laid down on the existing segments. The erector can perform at least a swiveling operation and multi-stage linear operations while gripping various types of segment pieces Sa, Sb, Sc.;COPYRIGHT: (C)2010,JPO&INPIT