한국지반공학회:학술대회논문집 (Proceedings of the Korean Geotechical Society Conference)
- 한국지반공학회 2007년 가을학술발표회
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- Pages.502-513
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- 2007
Stability of Unsaturated Soil Slopes considering the Effect of Wetting Front Suction Loss
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Jeong, Sang-Seom
(Department of Civil Eng., Yonsei University) ;
- Kim, Jae-Young (Department of Civil Eng., Yonsei University)
- 발행 : 2007.09.14
초록
This paper describes the rainfall-induced slope failures caused by infiltration due to prolonged rainfall. The emphasis was on quantifying the effect of fine-grained contents which are influencing on the infiltration rate in the wetting front of initially unsaturated slopes during rainfall. Suction tests by tensiometer were performed for five mixture specimens with varying fine-grained contents and then, numerical analyses for the stability of unsaturated slopes are carried out for different relative densities and mixture portions based on the soil water characteristic curves obtained by GCTS pressure plate. It is shown that the fines are highly influenced on wetting front suction of unsaturated soil slopes. Based on the results, it is found that until 15% fine content is the limit showing different wetting front suction, beyond which the wetting band depth do not affect considerably the stability of unsaturated slopes.
키워드