国鉄新幹線泉越ずい道の地質と膨脹性岩石について

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概要

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• The Izumigoshi tunnel was excavated in volcanic rocks belong to the Yugaywara volcanic rocks group (pleistocene) , Inamura andesite group (pleistocene). During the excavation of this tunnel many accidents were encountered, were break down of fault zone at 92 k 890 m from Tokyo, deformation and failure of tunnel suports, tunnel lining due to swelling rocks extended about 360 m total long, which from altered volcanic glass, tuff and tuff breccia by hydrothermal alternation. The author analysed clay minerals in the rocks by X-ray diffraction method, concerned the relations between content of clay minerals and value of compressive strength, velosity of super sonic waves, and engineering difficulty occurred in the tunnel. In the results its was found that this clay minerals composed mainly montmorillonite, deformation and failure in the tunnel connected with content of clay minerals. The result of survey and analysis are shown in fig. 2. ~5.

• 一般社団法人日本応用地質学会の論文
• 1964-12-10

著者

• 吉川 恵也

  日本国有鉄道

• 吉川 恵也

  国鉄信濃川工事局

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• 国鉄新幹線泉越ずい道の地質と膨脹性岩石について
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