| 摘要 |
PROBLEM TO BE SOLVED: To provide a joint structure for a K segment, the structure that can reliably prevent the K segment from sliding even if a shear force due to an axial force acts on the K segment when excavating a tunnel by a shield method.SOLUTION: A joint structure for a K segment includes: a groove 15 formed to a B segment 10, in a joint part between pieces of the K segment 1 and the B segment 10; a spring member 17 stored in the groove 15; a wedge-shaped member 18 biased toward the K segment 1 by the spring member 17; and a locking joint 12 configured by a groove 3 formed to the K segment 1. |
