| 摘要 |
PROBLEM TO BE SOLVED: To provide a shield tunnel etc. that can reduce a construction cost and a construction period.SOLUTION: A tunnel 1 serving as the shield tunnel includes road floors 3, 5 inside used for passing of vehicles. The road floor 3 includes a space 18a with a width approximately equal to or larger than the lane width of a travel lane 9a (9b), at the side of the travel lanes 9a, 9b. At a branch part 6 which is part of the tunnel 1, the space 18a is provided with an acceleration/deceleration lane 10 branched from the travel lane 9a inside a shield wall 2. At least part of a section not provided with the acceleration/deceleration lane 10 in the space 18a is provided with tunnel facilities such as a ventilating facility 21 and an evacuation passage 11 substantially on the same line as the acceleration/deceleration lane 10 in the major axis direction of the tunnel 1. |
