| 摘要 |
PROBLEM TO BE SOLVED: To provide an inter-tunnel seal structure for producing sufficient cut-off performance while avoiding an elastic strip member from being removed from a preceding tunnel.SOLUTION: An inter-tunnel seal structure S which is provided between a preceding tunnel 10b and a following tunnel 10a constructed adjacent thereto includes an elastic seal member 30 provided on the surface of the following tunnel 10a along a tunnel longitudinal direction, and an elastic strip member 50 provided on the surface of the preceding tunnel 10b at a position opposite to the elastic seal member 30. The elastic strip member 50 includes a soft elastic part 51 arranged in the intermediate in the cross direction and formed of a material softer than that for the elastic seal member 30, and hard elastic parts 55 arranged at both ends in the cross direction and each formed of a material harder than that for the soft elastic part 51. The hard elastic part 55 is pressed against the preceding tunnel 10b to be fixed thereto, and the elastic seal member 30 is protruded to the side of the preceding tunnel 10b so that its front end abuts on the soft elastic part 51. |
