- 期刊
NUMERICAL ASSESSMENT OF THE IMPACT AREA AND THE GEOMETRY OF A LANDSLIDE DAM: THE NAN-SHI-KENG LANDSLIDE, TAIWAN
摘要
This study predicts the impact area and the stability of a landslide dam of the moving Nan-Shi-Keng landslide in Taiwan for different joint friction angles using a three-dimensional distinct element code, 3DEC. When the landslide occurs, the sliding mass moves longitudinally along the basal sliding surface. Then, rocks spread laterally and ascend after they collide with the hill on the opposite side of the river. Increasing the joint friction angle substantially decreases the impact area and the height of the landslide dam. The computational results reduce the variation of the three-dimensional geometry of the landslide dam from that obtained using empirical formulas and suggest that the landslide dam is stable. The 3DEC is a potentially important tool for local disaster mitigation policy assessments of the impact of large landslides.
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