| 摘要 |
PROBLEM TO BE SOLVED: To provide a segment that configures a shield tunnel capable of being easily demolished from the outside of the shield tunnel without the need for a special device.SOLUTION: In a segment 30 configuring a shield tunnel, a metal joint box 36 is fixed to an edge of an end surface on a side to be connected to another segment 31, in such a manner as to be exposed on an outside surface of the segment 30, via a skin plate 34, and a one-path joint 33 is fixed to the metal joint box 36 by a weld zone 38 in such a manner as to protrude toward the end surface of another segment 31. |
