장기간 강우특성 변화에 따른 국내 사면의 안정성 = Slope Stability by Variation of Rainfall Characteristic for Long Period

다국어 초록 (Multilingual Abstract)

Shallow landslides and debris flows are a common form of soil slope instability in South Korea. These events maybe generally initiated as a result of intense rainfall or lengthening rainfall duration because of the effects of climate change.
This paper presents the evaluation of rainfall-induced natural soil slope stability and reinforced soil slope instability undervertical load (railway or highway load) throughout South Korea based on quantitative analysis obtained from 58 sitesrainfall observatories for 38 years. The slope stability was performed for infinite and geogrid-reinforced soil slopes bytaking an average of maximum rainfall every ten years from 1973 to 2010. Seepage analysis is carried out on unsaturatedsoil slope using the maximum rainfall at each site, and then the factor of safety was calculated by coupled analysis usingsaturated and unsaturated strength parameters. The contour map of South Korea shows four stages in 10-year-time forthe degree of landslide hazard. The safety factor map based on long term observational data will help preventrainfall-induced soil slope instability for appropriate design of geotechnical structures regarding disaster protection.

참고문헌 (Reference)

1 김유성, "침투해석을 고려한 비탈면 설계에 대한 연구" 한국지반공학회 29 (29): 135-147, 2013

2 이수형, "열차하중을 받는 토목섬유 보강사면의 수치해석" 한국철도학회 9 (9): 753-760, 2006

3 GeoStudio, "version 8.0.10, Manual for SEEP/W and SLOPE/W modeling" GEO-SLOPE International, Ltd. 2012

4 Hwang, H, "Site Investigation on Slope Hazard and Triggering Factors of 2011 in Korea" 13-18, 2012

5 Collison, A., "Modeling the impact of predicted climate change on landslide frequency and magnitude in SE England" 55 : 205-218, 2000

6 Elias, V., "Mechanically Stabilized Earth Walls and reinforced Soil Slopes Design and Construction Guidelines"

7 Kim, J., "Instability of partially saturated soil slopes due to alteration of rainfall pattern" 147-148 : 28-36, 2012

8 Dixon, N., "Impact of predicted climate change on landslide reactivation: case study on Mam Tor, UK" 4 : 137-147, 2007

9 Dehn, M., "Impact of climate change onslope stability using expanded downscaling" 55 : 193-204, 2000

10 Schmertmann, G. R., "Design charts for geogrid-reinforced soil slopes" 108-120, 1987

11 ESRI, "ArcGIS Desktop: Release 10"

12 van Genuchten, "A closed form equation for predicting the hydraulic conductivity of unsaturated soils" 44 : 892-898, 1980

13 Yoo, C.S., "A Study on Design of Geosynthetically Reinforced Slopes" 351-354, 1998

14 Korean Geosynthetics Society, "3rd Short Course, Design, Construction, and Test Evaluation for Reinforced Earth Method"