高温履歴を有する稲田花こう岩の透水係数と等価管路モデルに基づく評価

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タイトル別名
  • Permeability of Inada Granite with High Temperature History and Its Estimation by the Equivalent Channel Models.
  • コウオン リレキ オ ユウスル イナダ カコウガン ノ トウスイ ケイスウ ト トウカ カンロ モデル ニ モトズク ヒョウカ

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Permeability of an intact specimen and specimens subjected to slow, uniform temperature increase until 100 and 200°C in Inada granite was measured at the effective confining pressures up to 26MPa by transient pulse technique. In addition, permeability was predicted with various equivalent channel models by using the pore volume and pore volumetric distribution measured by the mercury intrusion porosimetry, and compared with the practically measured permeability. Main results are as follows.<BR>Permeability of Inada granite increases with increase of heated peak temperature, and the permeability of specimen heated until 200°C is about 3.2 times as large as that of intact specimen. The reason for this is that microcracks were induced and extended by temperature increase. On the relationship between permeability and effective confining pressure, permeability decreases notably with the pressure increase until 16MPa, moreover, microcracks thermally induced closed almost at the range above 16MPa, and effects of high temperature an permeability disappeared almost.<BR>Permeability predicted by the hydraulic radius model using porosity and pore volumetric distribution of specimens was in agreement with the practically measured permeability. Permeabilities predicted by capillary model, Marshall probabilistic model and Juang-Holtz probabilistic model diverged notably from the measured one, but the relationship between permeability and heated peak temperature was similar to that of measured permeability.

収録刊行物

  • 応用地質

    応用地質 40 (1), 25-35, 1999

    一般社団法人 日本応用地質学会

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