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논문 기본 정보

자료유형
학술저널
저자정보
Tran The Viet (Water Resources University) Trinh Minh Thu (Water Resources University) Giha Lee (Kyungpook National University) Sewook Oh (Kyungpook National University) Nguyen Thi Hai Van (Vietnam Institute of GeoSciences and Mineral Resources)
저널정보
한국지반환경공학회 한국지반환경공학회 논문집 한국지반환경공학회 논문집 제16권 제4호
발행연도
2015.4
수록면
23 - 32 (10page)

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초록· 키워드

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This paper addresses the effects of extreme rainfall on the stability of cut slopes in Yen Bai city, Northern Viet Nam. In this area, natural slopes are excavated to create places for infrastructures and buildings. Cut slopes are usually made without proper site investigations; the design is mostly based on experience. In recent years, many slope failures have occurred along these cuts especially in rainy seasons, resulting in properties damaged and loss of lives. To explain the reason that slope failure often happens during rainy seasons, this research analyzed the influence of extreme rainfalls, initial ground conditions, and soil permeability on the changes of pore water pressure within the typical slope, thereafter determining the impact of these changes on the slope stability factor of safety. The extreme rainfalls were selected based on all of the rainfalls triggering landslide events that have occurred over the period from 1960 to 2009. The factor of safety (FS) was calculated using Bishop’s simplified method. The results show that when the maximum infiltration capacity of the slope top soil is less than the rainfall intensity, slope failures may occur 14 hours after the rain starts. And when this happens, the rainfall duration is the deciding factor that affects the slope FS values. In short, cut slopes in Yen Bai may be stable in normal conditions after the excavation, but under the influence of tropical rain storms, their stability is always questionable.

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ABSTRACT
1. Introduction
2. The study area
3. Background of the rainfall-induced slope failures
4. Rainfall induced slope instability analysis
5. Conclusion and recommendations
References

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UCI(KEPA) : I410-ECN-0101-2016-532-001261921