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List of products by author: T. Seto
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Investigation of the Seismic Performance of the Tunnel Sections with Non-Uniform Heights
Abstract: Tokyo Metro Co. Ltd. operates 9 routes in Capital area of Japan; total length of tunnels is 1.66 km. In Japan, subway tunnels were constructed by the cut & cover method and have typically horizontally oriented double cell box tunnels with rectangular cross sections. Because some tunnels had to be built under narrow roads in Tokyo, there exist some vertically oriented double cell box tunnels...
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Study on Maintenance System for Cut and Cover Tunnels Showed Signs of Deterioration by Chloride Attack
Abstract: While maintaining subway tunnels, some of them already showed signs of deterioration by chloride attack. Therefore, it was investigated the mechanism of deterioration by chloride attack, features of sections of deterioration by chloride attack, methods of determining repair range and appropriate repair method. Furthermore, as a method of determining the detailed repair range, silver nitrate...
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Study on Section Repair Method for Cut and Cover Tunnels
Abstract: Tokyo Metro currently maintains 196km of structures with 9 routes, of which approximately 85% are tunnels. As a daily repair against deformation such as freaks and leakage of tunnels, cross-section repair is commonly used. However, methods and materials of crosssection repair have been used for many years without being updated. So, to introduce a method using the latest technology and...
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