| 摘要 |
PROBLEM TO BE SOLVED: To provide a joining structure and method for large-sectional tunnel segments, which is improved in joining strength between a concrete structure and steel segment rings. SOLUTION: According to the joining structure and the joining method for the large-sectional tunnel segments, an upper cut-away front end 10a or a lower cut-away front end 10b of the steel segment ring 7a is mounted on a segment lower portion support surface 22a of a cogging portion 22 formed at a front end of each of a top board and a bottom board 12 of the concrete structure 11, and a joint plate 16 which is an upper cut-away front end surface of the steel segment 7 is abutted on a cushioning member 23 embedded in a segment cut-away end abutting surface 22b of the cogging portion 22. Then, the joint plate 16 is implanted in each of the top board and the bottom board 12, and an anchor bar 24 penetrating the cushioning member 23 is inserted into the joint plate 16, followed by clamping a fixing nut 27 at a front end screw portion of the anchor bar 24, whereby the upper cut-away front end 10a of the steel segment 7 is joined to each of the top board and the bottom board 12 in one body.
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