| 摘要 |
PROBLEM TO BE SOLVED: To provide a segment which can facilitate filling work in filling plural insert holes formed in one joining portion of a pair of segments with a filler. SOLUTION: Plural joining grooves 2 having a joining metal fitting 3 are formed on both side joining surfaces 1a, and with the joining surfaces 1a abutting on each other, a connecting metal fitting 4 is inserted in an insert hole formed by the joining groove parts 2 to connect the joining metal fittings 3 to each other, thereby constructing a tunnel wall body. The segment has a communicating passage 30 for communicating plural grooves 2 formed in the same joining surfaces 1a to each other and a filling passage 31, one end of which is opened to one of plural joining grooves formed in the same joining surface and the communicating passage 30, and the other end of which is opened to the inner peripheral surface 1b.
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