SIMPLE METHOD FOR PREDICTING CHANGES OF GROUNDWATER DISTRIBUTION CAUSED BY A CONSTRUCTION OF A MOUNTAIN TUNNEL DIGGING AND ITS APPLICABILITY

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  • NISHIGAKI Makoto
    社団法人 土木学会 岡山大学 環境理工学部デザイン工学科
  • KOMATSU Mitsuru
    社団法人 土木学会 岡山大学
  • IRIE Akira
    社団法人 土木学会 岡山大学大学院自然科学研究科博士後期過程
  • YONO Koichiro
    社団法人 土木学会 (株) 奥村組 広島支店
  • OTA Takuro
    社団法人 土木学会 (株) 大林組 広島支店

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Other Title
  • 山岳トンネル掘削時の地下水変動の簡易的予測法と適用性
  • サンガク トンネル クッサクジ ノ チカスイ ヘンドウ ノ カンイテキ ヨソクホウ ト テキヨウセイ

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Abstract

In order to predict the range of groundwater level fluctuation and the flow rate of spring water in a tunnel, which are caused by digging a mountain tunnel, some simple methods were proposed.<br>In this paper, the preconditions of these conventional simple methods are clarified. And new simple method, which can treat rainfall intensity and a coefficient of permeability that are not handled in these methods, is proposed by analyzing the results of a vertical-section-2-dimensional-finite-element-method. Moreover, based on results of new methods, the new method to set a range, which should be investigated and modeled for numerical analysis before excavation, is proposed.

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