SLOPE FAILURE IN A HYDROTHERMAL ALTERATION AREA : A CASE STUDY ON THE IZU PENINSULA, CENTRAL JAPAN

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概要

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• Two heavy rainfalls in August of 1982 caused about two thousand failed slopes that seriously damaged to transportation networks on the Izu Peninsula in central Japan. About half of the failed slopes took place in hydrothermal alteration areas. Details of the mode, volume, and frequency of slope failure differed among the alteration zones. In general, slope failure was more frequent in low grade zones such as those made up of smectite and halloysite, probably because of the extreme decrease of the strength of the parent rock in the course of alteration. The change in rock strength seems to be related to the amount, mode of occurrence and mineralogical properties of the authigenic minerals.

• 日本自然災害学会の論文

著者

• Utada Minoru

  Associate Professor The University Museum The University Of Tokyo

関連論文

• SLOPE FAILURE IN A HYDROTHERMAL ALTERATION AREA : A CASE STUDY ON THE IZU PENINSULA, CENTRAL JAPAN

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