Post-failure simulations of a large slope failure using 3DEC: The Hsien-du-shan slope

Jian Hong Wu, Wei Kang Lin, Hsuan Teh Hu

Research output: Contribution to journalArticle

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Abstract

The goal of this paper is to evaluate the post-failure behavior of the Hsien-du-shan rock avalanche, which was triggered by Typhoon Morakot in 2009, using a three-dimensional (3D) discrete element program, namely, 3DEC. The 3D slope topography and local joint sets are explicitly considered in the calculations, and the joint sets cut the sliding rock mass into blocks with arbitrary shapes. The modeled blocks exhibit the elastic behavior of the local rocks. The analysis successfully simulates the wedge failure at the initiation of the landslide. Additionally, the 3DEC results clarify the local rock sliding phenomena at the boundaries of the source area. The simulated depositional area correlates well with the actual area affected by the Hsien-du-shan rock avalanche. In addition, the erosion of a ridge by the sliding rock near the southwestern margin of the area at an elevation of 590 m has a significant influence on the shape and size of the impacted area. The interlocking effect between blocks is also considered.

LanguageEnglish
Pages92-107
Number of pages16
JournalEngineering Geology
Volume242
DOIs
StatePublished - 2018 Aug 14

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slope failure
Rocks
sliding
rock avalanche
rock
simulation
typhoon
landslide
Landslides
topography
erosion
Topography
Erosion

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Geology

Cite this

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Post-failure simulations of a large slope failure using 3DEC : The Hsien-du-shan slope. / Wu, Jian Hong; Lin, Wei Kang; Hu, Hsuan Teh.

In: Engineering Geology, Vol. 242, 14.08.2018, p. 92-107.

Research output: Contribution to journalArticle

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