Measurement of Suction Pressure Generated in the Process of Frost Heaving in Rock

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  • NAKAMURA Dai
    Department of Civil and Environmental Engineering, Kitami Institute of Technology
  • KAWAGUCHI Takayuki
    Department of Civil and Environmental Engineering, Kitami Institute of Technology
  • WATANABE Tatsuya
    Department of Civil and Environmental Engineering, Kitami Institute of Technology
  • KAWAJIRI Shunzo
    Department of Civil and Environmental Engineering, Kitami Institute of Technology
  • YAMASAKI Shintaro
    Department of Civil and Environmental Engineering, Kitami Institute of Technology
  • YAMASHITA Satoshi
    Department of Civil and Environmental Engineering, Kitami Institute of Technology

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Other Title
  • 岩石の凍上過程において発生する吸水圧の計測
  • ガンセキ ノ トウジョウ カテイ ニ オイテ ハッセイ スル キュウスイアツ ノ ケイソク

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Abstract

<p>Recently it has been found that frost heave phenomena can be seen not also in soil but also in rock. It is obvious, however, that the number of researches on frost heaving in rock is much less than that of researches on frost heaving in soil. In the present research, we newly developed test equipment in which a pressure transducer is incorporated into a device for testing frost heave in rock. Frost heaving tests were performed using three types of rocks (Ohya tuff, which is soft rock with high frost susceptibility; Kimachi sandstone, which is medium-hard rock with low frost susceptibility; and Sapporo soft rock, which is non-frost-heaving soft rock) to measure the suction pressure generated in the process of frost heaving. In these tests, we obtained fairly large negative pressures for Ohya tuff and Kimachi sandstone. In mediumhard Kimachi sandstone, negative pressure was generated before frost heaving displacement started. On the other hand, negative pressure was not generated in non-frost-heaving Sapporo soft rock. Therefore we considered that frost heaving in rock might be caused by negative pressure generated in the process of frost heaving.</p>

Journal

  • Journal of MMIJ

    Journal of MMIJ 133 (2), 4-11, 2017

    The Mining and Materials Processing Institute of Japan

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