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List of products by author: Y. Morohashi
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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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Utilization of IT and the Current Condition of the Repair Measures in the Maintenance of Subway Tunnels
Abstract: Tokyo Metro Co., Ltd. (“Tokyo Metro”) operates a subway network with nine lines, 195.1 km of track and daily ridership of 6.44 million in Tokyo, the largest metropolitan area in the world. More than 80 years have passed since some tunnels were built, and soft ground, saline groundwater and other factors have caused peculiar structural deformations. In this paper, we describe the use of IT for...
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