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List of products by author: M. Komiyama
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A study on the trend of the deformation that has occurred in the railway tunnel
Abstract: Tunnel constructed more than 50 years ago is over 50 percent out of railway tunnel owned by our company at present, and also the ratio will be over 90 percent in 20 years later. It is expected that the numbers of engineers decrease under the influence of the declining birthrate in the future, and also the number of aged tunnels increase. And therefore, efficient inspection and maintenance will...
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Investigations into Heaving of Railway Roadbed in Mountain Tunnels and Effect of Countermeasure Work
Abstract: This paper outlines long-term investigations on heaving in railway roadbeds as seen in mountain tunnels and effectiveness of countermeasures. Roadbed heaving and track upheaval have been confirmed in certain tunnels. The heaving did not stop despite track maintenance intended to mitigate it. Furthermore, heaving tended to progress at specific locations. Through detailed and long-term...
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