| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a movement regulation structure and movement regulation method of a segment ring, capable surely preventing the segment ring from moving when a shield bag is expanded when constructing a tunnel curve part by a shield machine. <P>SOLUTION: A plurality of segment rings 15... supporting each other are formed on the inner periphery of a hole 1, and when expanding the shield bag 16 which is mounted on the outer peripheral part of at least two segment rings 15, 15 separated from each other to support the segment rings 15, 15 and section the hole 1, cambers 20... for regulating the movement of the segment rings 15 are inserted between the rear end part of a skin plate 11 and the front end part 15a of the segment rings 15. Thus, the chambers are engaged between the rear end part of the skin plate and the front end part of the segment rings, and the movement of the segment rings is surely regulated. <P>COPYRIGHT: (C)2012,JPO&INPIT |
