Widening the rim of the road widening device and the road widening

摘要

PROBLEM TO BE SOLVED: To provide a widening device and a widening method for an existing tunnel, which are improved in working efficiency.;SOLUTION: The widening device 10 is for use in constructing a widened tunnel D on an outer peripheral side of an existing tunnel A, and formed of a leading stand 12, a trailing stand 14, a moving stage 16, widening work equipment 18, a transfer device 20, and a moving device 22. The stand 12 is arranged so as to be opposed to a working face of the widened tunnel and movable along a tunnel axial direction. The stand 14 is arranged adjacently to the rear of the stand 12, and movable along the tunnel axial direction. The stage 16 is arranged on a ceiling portion of the stand 14 in a manner movable along a tunnel circumferential direction. The equipment 18 is mounted on the ceiling portion of the stand 14 in a manner movable along the tunnel axial direction. The transfer device 20 selects pieces of the equipment 18 according to the procedure of widening works, and transfers the selected pieces from the stand 14 to the stage 16 to be mounted on the same. The moving device 22 moves the selected pieces of the equipment 18 mounted on the stage 16 along the tunnel circumferential direction while setting the selected pieces in a readily available state for the widening works.;COPYRIGHT: (C)2005,JPO&NCIPI