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http://dx.doi.org/10.7843/kgs.2016.32.10.17

A Proposed Analytical Model for the Debris Flow with Erosion and Entrainment of Soil Layer  

Lee, Kwang-Woo (Dept. of Civil and Environmental Eng., Yonsei Univ.)
Park, Hyun-Do (Dept. of Civil and Environmental Eng., Yonsei Univ.)
Jeong, Sang-Seom (Dept. of Civil and Environmental Eng., Yonsei Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.32, no.10, 2016 , pp. 17-29 More about this Journal
Abstract
A debris flow analysis model has been developed to simulate the erosion and entrainment of soil layer. Special attention is given to the model which represents strength softening behaviour of soil layer due to velocity of deformation. The 3D FE analysis by Coupled Eulerian-Lagrangian (CEL) model is conducted to simulate the debris flow. The model is validated using published data on laboratory experiment (Mangeny et al., 2010). It has been definitely shown that proposed model is in good agreement with the results of laboratory data. Futhermore, the FE analysis is conducted to ensure capability of simulating the real scale debris flow. The result of Ramian watershed, Korea shows that the debris flow has increased the volume and speed and it is in good agreement with field investigation. Based on this, it is confirmed that proposed model shows good agreement of the behavior of the actual and analytical debris flow.
Keywords
Debris flow analysis; Entrainment; Bed sediment; Large deformation FE analysis; Coupled Eulerian-Lagrangian technique; Flow velocity;
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Times Cited By KSCI : 3  (Citation Analysis)
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