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http://dx.doi.org/10.9720/kseg.2019.4.541

Study on Landslide Flume Tests Using Stability Analysis of the Unsaturated Infinite Slope  

Song, Hyo-Sung (Disaster Prevention Research Division, National Disaster Management Research Institute)
Chae, Byung-Gon (Policy & Planning Division, Korea Institute of Geoscience and Mineral Resources)
Song, Young-Suk (Geo-Environmental Hazard Research Center, Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources)
Choi, Jung-Hae (Department of Earth Science Education, Kyungpook National University)
Seo, Won-Gyo (Office of International Student Affairs, Kyungsung University)
Woo, Ik (Department of Architecture & Coastal Construction Engineering, Kunsan National University)
Publication Information
The Journal of Engineering Geology / v.29, no.4, 2019 , pp. 541-552 More about this Journal
Abstract
In this study, landslide flume tests were performed to analyze characteristics of ground characteristics and landslide occurrence due to rainfall infiltration. As test materials, weathered granite soil and gneiss soil, the most frequent landslides in Korea, were used, and landslides were triggered by heavy rain (Intensity = 200 mm/hr). The measurement sensors were installed with 3 sets at toe, slope, top part and shallow (GL-0.2 m), middle (GL-0.4 m), and deep (GL-0.6 m) depth in the slope and measured at 10 second intervals. After landslide flume tests, the slope stability analysis was performed by applying the unsaturated soil theory based on the change of ground characteristics and compared with actual landslide occurrence from flume test. As a result of the analysis, factor of safety reflected the landslide occurrence from flume test and factor of safety decreased as rainfall infiltration, leading to slope failure. Finally we compared to the factor of safety below 1 and actual landslide occurrence time, the average difference was 1,600 seconds for weathered granite soil and 5,400 seconds for weathered gneiss soil.
Keywords
landslide; flume test; heavy rainfall; matric suction; factor of safety;
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Times Cited By KSCI : 1  (Citation Analysis)
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