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List of products by author: T. Sasaya
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Case study of a tunnel with time-dependent behaviour in a volcanic area of Hokkaido
Abstract: Records of the construction and repair of a tunnel with time-dependent deformation were analysed to clarify the mechanism and to construct judging method of time-dependent deformation part. As a result, it was inferred that release of in situ stress of rock converged for about 80 days and time-dependent deformation resulted from rock degradation by the change of rock surroundings mainly with...
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Project study of tunnels with time-dependent behaviour – Geochemical and mechanical characteristic of rock mass
Abstract: In the present research, tunnel geological conditions and mineralogical properties of rock are analysed on the basis of the tunnel construction record with the occurrence of time-dependent deformation. The geology of the studied tunnel is mainly andesitic lava, dacite that includes auto- brecciated lava and pyroclastic rock, all of which have undergone hydrothermal alteration. As the results of...
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