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http://dx.doi.org/10.7843/kgs.2017.33.4.5

A Study on the Stability and Mechanism of Three-Hinge Failure  

Moon, Joon-Shik (School of Architectural, Civil, Environmental and Energy Engrg., Kyungpook National Univ.)
Park, Woo-Jeong (Dept. of Geotechnical Engrg., Sambo Engineering Co., Ltd.)
Publication Information
Journal of the Korean Geotechnical Society / v.33, no.4, 2017 , pp. 5-15 More about this Journal
Abstract
Three-hinge failure occurs in a jointed rock slope with a joint set parallel with slope and a conjugate joint set. Limit Equilibrium Method (LEM) and Finite Element Method (FEM) which are commonly used for slope design, are not suitable for evaluating stability against three-hinge failure, and this study performed parametric study to analyze the failure mechanism and to find influence factors causing three-hinge failure using UDEC which is a commercial two-dimensional DEM based numerical program. Numerical analyses were performed for various joint structural conditions and joint properties as well as ground water conditions. It was found that pore water pressure is the main factor triggering the three-hinge failure and the mode of failure depends on friction angle of basal joint and bedding joint set. The results obtained from this study can be used for adequate and economic footwall slope reinforcement design and construction.
Keywords
Footwall slope failure; DEM analysis; Three-hinge failure; Pore water pressure;
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Times Cited By KSCI : 1  (Citation Analysis)
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