Maintenance of the undersea section of the Seikan Tunnel |
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| Authors: | Michitsugu Ikuma |
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| Affiliation: | Sapporo Construction Office, Japan Railway Construction Public Corporation Itoh Building, Nishi 4-chome, Kita 4-jyo, Chuo-ku, Sapporo, Hokkaido 060 0004, Japan |
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| Abstract: | This paper introduces the results of measurements made over a period of 14 years after the Seikan Tunnel was opened for service. Because this tunnel is a very long undersea tunnel with the length of 54 km, the necessity of clarifying the long-term behavior of the tunnel structure was recognized from the start. Various measurements are made to survey the condition of the ground and lining concrete and data thus obtained are used to assess the soundness of the tunnel structure. Judging from the data thus far obtained, the tunnel structure appears to remain in a good condition. |
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| Keywords: | Tunnel maintenance Long-term monitoring Water inflow Convergence measure |
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