基岩クラックを通した選択流と斜面安定性に関する数値実験

• 堤 大三

  京都大学防災研究所水災害研究部門

• 藤田 正治

  京都大学防災研究所水災害研究部門

• SIDLE Roy C.

書誌事項

タイトル別名

• PREFERENTIAL FLOW THROUGH CRACKS IN WEATHERED BEDROCK AND SLOPE STABILITY: NUMERICAL MODELING

抄録

Numerical experiments were conducted to assess the effect of preferential flow through pipes and cracks within weathered bedrock on slope stability, using hydrological model in which water flows within both the matrix and macropores. The hillslope consists of soil and weathered bedrock layers. Hydraulic properties were assigned to the weathered bedrock as well as the soil layer, and the regolith flow calculations were conducted within the slopes. Results demonstrated that the preferential flow pathway rapidly transported rainwater to the deeper layer of the slope, and if the outlets of the preferential flow pathway remained within the slope, the pressure head increased around these points. This increase in pressure head caused a decrease in the factor of safety at the deeper layer of the slope.

収録刊行物

• 水工学論文集

  水工学論文集 49 1039-1044, 2005

  公益社団法人 土木学会

キーワード

• cracks
• weathered bedrock
• slope stability
• landslide
• Richards' equation
• preferential flow

詳細情報

• CRID: 1390001205170271488
• NII論文ID: 130003842003
• DOI: 10.2208/prohe.49.1039
• ISSN: 18849172
• ISSN: 09167374
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可