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대상 데이터
- In order to understand the mechanism of landslides taking place during rainfall, a slope was selected and then instrumentation was heavily installed. The site selected is a landslide-prone area, where 23 people were dead by the landslide due to heavy rainfall in 1994. The natural slope is steep at the upper part and becomes gentle downwards as shown in Figure 5.
- Shrubs and trees cover the slope surface. Two locations were selected for the installation of instrumentation including tensiometers, piezometers, water mocks and inclinometers. Those were installed at different elevations but their imbedded depth is less than 110 cm, because the weathered depth of the slope is shallow.
이론/모형
- The safety factors on sliding for the slope can be calculated using software programs written by many authors. The Bishop and Janbu methods for scope failures were applied in this study. Needless to say, the safety factor on sliding for a slope changes with the increase or decrease of suction pressure.
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