| 摘要 |
PURPOSE: A structure of an inclined-typed underground tunnel is provided to minimize a length of a vertical section for preventing a reduction of safety according to the depth of the vertical section and the danger of the disconnection by a self-weight of a cable. CONSTITUTION: Each vertical tunnel(21,22) is connected with each inclined tunnel(23,24) connected each other during meeting in the lower mmiddle point of each facilities by evacuating to gradually deepen for a ground from the lower part. Thereby the necessary depth to maintain the safety of the tunnel(20) is kept by giving an inclination to a connected section to connect vertical sections as the decrease of the depth of the vertical sections.
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