Abstract
Many landslides were triggered by the 2004 Niigata-Chuetsu Earthquake (Mj = 6.8). The Nigiri landslide, one of the largest landslides, 500 m wide and 200 long, displaced about 40 m. This paper carried out fully coupled dynamic finite element analysis to reenact the ground liquefaction of Nigiri landslide. The ground water level was calculated using unsaturated–saturated finite element analysis, and considering the rainfall before the earthquake. Numerical results show that the increase of the excess pore water pressure was one of the main reasons for the occurrence of the huge landslide. Numerical analyses were also carried out to clarify the effectiveness of landslide stabilizations, such as dewatering system and piles. Numerical results show that the dewatering system was more effective than the stabilizing piles.
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References
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Cai, F., Ugai, K., Wakai, A., Kuroda, S. (2013). Fully Coupled Dynamic Effective Stress Analysis of the Nigiri Landslide Triggered by 2004 Niigata-Chuetsu Earthquake. In: Ugai, K., Yagi, H., Wakai, A. (eds) Earthquake-Induced Landslides. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-32238-9_63
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DOI: https://doi.org/10.1007/978-3-642-32238-9_63
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