DIFFUSION AND ADVECTION PHENOMENON OF SOLUBLE TYPE GROUTING

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  • HAYASHI Kentaro
    社団法人 土木学会 五洋建設株式会社土木企画部
  • ZEN Kouki
    社団法人 土木学会 九州大学大学院工学研究院
  • YAMAZAKI Hiroyuki
    社団法人 土木学会 (独)港湾空港技術研究所地盤・構造部

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  • 溶液型薬液による浸透注入時の移流分散現象
  • ヨウエキガタ ヤクエキ ニ ヨル シントウ チュウニュウジ ノ イリュウ ブンサン ゲンショウ

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The strength of sand improved by the soluble type of grouting decreases with the increasing distance of injection point. One of the reasons for this strength decrease is considered the dilution of grout that occurs as it fills the void of sand layer. In this study, model tests are performed to clarify the dilution at the time of grouting on the basis of the theory on advection and diffusion. Measures used were: 1) verification of the theory by one-dimensional model grouting test, 2) consideration on the application of a numerical model for soluble type grouting, and 3) verification of the model at a field test. As a result, it was found that the diffusion coefficient at the time of grouting, which was measured in the field test, was greater than the one from the one-dimensional model test. However, it was confirmed that the proposed model could explain the dilution of grout in grouting process.

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