| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure for reducing micro pressure wave including an air pipe.SOLUTION: The structure for reducing micro pressure wave including an air pipe 21 includes a hood structure formed in front of an entry of a railroad tunnel and an air pipe section in which one or more of air pipes 21 are formed along the circumference of the hood structure. The air pipe 21 includes a horizontal inflow section 211 formed to be extended in the longitudinal direction inside the hood structure, an outflow section 213 formed outside the hood structure and an intermediate section 212 for communicating the horizontal inflow section 211 and the horizontal outflow section 213 with each other. |
