MOVABLE TYPE SEGMENT HOLDING DEVICE AND SEGMENT HOLDING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a movable type segment holding device capable of suppressing the deformation of a segment to the minimum, eliminating a replacement operation, and shortening a working time by moving forward according to an excavation while holding the shape of the segment at all times. SOLUTION: A segment holding device 1 holding the shape of a segment S covering an excavated hole excavated by a shield machine K comprises upper and lower garters 2A and 2B and an expansion device 3 expanding the upper and lower garters 2A and 2B toward the segment S. A caterpillar type movable mechanism 4 in contact with the inner surface of the segment S is installed on the upper and lower garters 2A and 2B, and the segment holding device 1 is connected to the shield machine K and moves forward according to the excavation.