凍結した支笏溶結凝灰岩の力学的挙動の時間依存性

書誌事項

タイトル別名
  • Time-Dependency of Mechanical Behavior of Frozen Shikotsu Welded Tuff
  • トウケツ シタ シコツ ヨウ ケツ ギョウカイガン ノ リキガクテキ キョドウ ノ ジカン イソンセイ

この論文をさがす

抄録

Understanding time-dependent deformation of frozen rock is significant for the assessment of long-term stability of rock slopes in cold region. In this study, to clarify the time-dependent deformation of frozen rock and influence of water content on the deformation, a series of uniaxial compression tests and creep tests were carried out on Shikotsu welded tuff under the dry and wet conditions at -20<tt>℃</tt> (-4<tt>°</tt>F). The uniaxial compressive strength (UCS) of frozen wet specimens was approximately equal to that of frozen dry specimens at the strain rate below 4.2<tt>×</tt>10-6/s. However, the former was greater than the latter at higher strain rates. The creep life of frozen wet specimens was longer than that of frozen dry specimens at the stress level above 13.4 MPa. On the other hand, the former was shorter than the latter at lower stress levels. Deformation of frozen wet specimens was larger than that of frozen dry specimens. The frozen dry and wet specimens showed different axial strain rate-axial creep strain curves. These differences could be explained by the presence of pore ice. Therefore, water content of rock should be considered for the assessment of long-term stability of rock slopes in cold region.

収録刊行物

  • 資源と素材

    資源と素材 129 (7), 433-439, 2013

    一般社団法人 資源・素材学会

参考文献 (19)*注記

もっと見る

詳細情報 詳細情報について

問題の指摘

ページトップへ