Factor analysis of residual ratio of pore water pressure on landslide along reservoir

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  • KODA Atsushi
    Erosion and Sediment Control Research Group, Public Works Research Institute
  • SUZUKI Masayuki
    Erosion and Sediment Control Research Group, Public Works Research Institute
  • FUJISAWA Kazunori
    Erosion and Sediment Control Research Group, Public Works Research Institute
  • DANJO Yushi
    INA Corporation
  • ISHII Yasuo
    Erosion and Sediment Control Research Group, Public Works Research Institute

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Other Title
  • 貯水池周辺地すべりにおける残留率の要因分析
  • チョスイチ シュウヘン ジスベリ ニ オケル ザンリュウリツ ノ ヨウイン ブンセキ

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Abstract

Slope stability analysis for landslide along reservoir is performed in consideration of influence of residual pore water pressure caused by the drawdown of reservoir water level. The authors carried out seepage flow analysis of simple slope models and field dataset analysis of the residual ratio of pore water pressure, in order to examine the factors that have an influence on the residual ratio. As a result of analysis, it has high correlation between the residual ratio and two factors which are drawdown time of reservoir water level and horizontal distance from water's edge of reservoir to slip surface. We also showed representation method of the residual ratio by these two factors.

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