강우를 고려한 불포화 토사사면의 안정해석 연구
A Study of Stability Analysis on Unsaturated Soil Slopes Considering Rainfall
2
조회
0
다운로드
3
인용
0
참고문헌
키워드
초록
Shallow slope failures in residual soil during periods of prolonged infiltration are common in Korea. This study examines an infinite slope analysis to estimate the influence of infiltration on surficial stability of slopes by the limit equilibrium method. Approximate method which is based on the Green-Ampt model have been considered to evaluate the likelihood of shallow slope failure which is induced by a particular rainfall event that accounts for the rainfall intensity and duration for various return periods. Pradel & Raad method which is devised to predict the depth of wetting front to decomposed granite soil slopes having measured soil-water characteristic curves. To compare the results with those obtained from the Pradel & Raad method, a series of numerical analysis using SEEP/W were carried out. It was found that the stability analysis of unsaturated soils calculated by using the soil-water characteristic curve of decomposed granite soils was found to be a proper analysis for shallow slope failures due to rainfall.
Abstract
Shallow slope failures in residual soil during periods of prolonged infiltration are common in Korea. This study examines an infinite slope analysis to estimate the influence of infiltration on surficial stability of slopes by the limit equilibrium method. Approximate method which is based on the Green-Ampt model have been considered to evaluate the likelihood of shallow slope failure which is induced by a particular rainfall event that accounts for the rainfall intensity and duration for various return periods. Pradel & Raad method which is devised to predict the depth of wetting front to decomposed granite soil slopes having measured soil-water characteristic curves. To compare the results with those obtained from the Pradel & Raad method, a series of numerical analysis using SEEP/W were carried out. It was found that the stability analysis of unsaturated soils calculated by using the soil-water characteristic curve of decomposed granite soils was found to be a proper analysis for shallow slope failures due to rainfall.
참고문헌 (15)
- 건설교통부, "도로설계편람, 제4편 토공 및 배수, pp.406-10", ~ (2000)
- 건설교통부, "국도건설공사 설계실무요령, 11. 공종 별 설계요령 2. 비탈면 안정공, pp.89", ~ (2003)
- 김기웅, "비탈면 안정 해석시 강우의 영향에 관한 연구", pp.105~ (2007), 한국지반공학회
- 신동훈, "CFGD댐 차수벽 균열시 침투거동해석을 위한 기초연구", Korean Geo-Environmental Conference 2007 (2007)
- 신방웅, "불포화 화강풍화토의 함수특성", 한국지반환경공학회 논문집, 4(1), pp.49~58 (2003), 한국지반환경공학회
- 조성은, "강우침투에 따른 불포화 토사사 면의 안정해석", 한국지반공학회, 6(1), pp.51~64 (2000)
- 조성은, "불포화 토사사면의 얕은파괴 해 석에 대한 비교 연구", 한국지반공학회논문집, 17(4), pp.135~143 (2001)
- 한국도로공사, "도로설계요령, 제2권 토공 및 배수, pp.123-124", ~ (2002)
- 한국토지공사, "단지조성공사 설계 및 적산 기준, 제 1편 설계기준 제3장 토공사", ~ (2006)
- Fredlund, D. G, "Stress state variables of unsaturated soils", J. of Geotech. Engrg. Div. ASCE, 113(Gt. 5), pp.447~464 (1977)
- Fredlund, D. G, "Equations for the soil water characteristic curve", Can. Geotech. J, 31, pp.521~532 (1994)
- Green, W. H, "Studies of soil physics I. The flow of air and water through soils", J. Agr. Sci, 4, pp.1~24 (1911)
- Lam, L, "Saturated Unsaturated Transient Seepage Model for Geotechnical Engineering", Proc., 5th Finite Elements in Water Resources Conf., pp.18~22 (1984)
- Mein, R. G, "Modeling infiltration during a steady rain", Water Resources Research, 9(2), pp.384~395 (1973)
- Pradel, D, "Effect of permeability on surficial stability of homogeneous slopes", J. Geotech. Engrg. ASCE, 119(2), pp.315~332 (1993)