Evaluating failure mechanisms of dip slope using a multiscale investigation and discrete element modelling

Meng Chia Weng*, Ming Lang Lin, Chia Ming Lo, Hsi Hung Lin, Cheng Han Lin, Jia Hao Lu, Shang Jyun Tsai

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

This study proposed an in-depth multiscale analysis procedure to identify the dip slope area and assess dip slope stability and influencing area. The proposed analysis procedure comprised five stages: (1) identifying the potential area of a dip slope, (2) analyzing the possible failure types of the dip slope, (3) evaluating slope activity, (4) analyzing dip slope stability under the influence of possible triggering factors, and (5) assessment of the deformation and deposition area. To validate the proposed procedure, the Chaochouhu region of Taiwan was analyzed as a dip slope case. In stages (1) to (3), the scale of the utilized map and the precision of associated data were evaluated to identify the potential area of a dip slope, the possible failure types, and the activity of each slope unit. In stages (4) and (5), the processes of deformation and sliding in a high-activity slope unit were simulated using the discrete element method. The numerical model was first verified using in-situ monitoring data obtained from inclinometers. Subsequently, the model was used to predict the slope behavior under conditions of wetting deterioration of geomaterial. The multiscale analysis revealed comprehensive information regarding the dip slope. The application of the proposed approach would be useful to civil engineers for evaluating dip slope stability as well as to relevant authorities for planning hazard mitigation strategies.

Original languageEnglish
Article number105303
JournalEngineering Geology
Volume263
DOIs
StatePublished - 20 Dec 2019

Keywords

  • Dip slope
  • Discrete element method
  • Multiscale analysis

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