Browse > Article
http://dx.doi.org/10.7843/kgs.2013.29.12.11

Proposal of Design Method for Landslides Considering Antecedent Rainfall and In-situ Matric Suction  

Kim, Jung-Hwan (Dept. of Civil and Environmental Eng., Yonsei Univ.)
Jeong, Sang-Seom (Dept. of Civil and Environmental Eng., Yonsei Univ.)
Kim, Yong-Min (Dept. of Civil and Environmental Eng., Yonsei Univ.)
Lee, Kwang-Woo (Dept. of Civil and Environmental Eng., Yonsei Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.29, no.12, 2013 , pp. 11-24 More about this Journal
Abstract
This study presents a design method for typical rainfall-induced landslide considering in-situ matric suction. Actual landslide data are used to validate the proposed method. The soil-water characteristic curve (SWCC) and unsaturated permeability are experimentally determined to estimate hydraulic properties of testing site. The field measurement of matric suction is carried out to monitor in-situ matric suction in a natural slope subjected to rainfall infiltration, which is incorporated in the landslide analysis. The wetting band depth and safety factor of the slope are assessed to clarify the effect of domestic rainfall pattern. Especially, the effect of antecedent rainfall on the slope stability is investigated and discussed in terms of wetting band depth using parametric study. It is found from the result of this study that proposed design method can consider the characteristic of unsaturated soil and effect of antecedent rainfall. The location of the scarp zone is fairly well predicted by proposed design method. Moreover, heavy rainfall, concentrated in the backward part with time, causes the lowest safety factor of the slope. These results demonstrate that decrease in matric suction due to antecedent rainfall may trigger slope instability. After the antecedent rainfall, additional rainfall may cause the slope failure due to increasing wetting band depth.
Keywords
Matric suction; Rainfall infiltration; Landslide; Antecedent rainfall; Seepage-slope stability analysis;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Ministry of Land Infrastructure and Transport (2009), River design criteria.
2 Ministry of Land Infrastructure and Transport (2012), Korea Precipitation Frequency Data Server, www.k-idf.re.kr.
3 National Disaster Management Institute (2008), A study on the steep slope information compilation and development of an analysis system, 1st report: the application of an early warning system using rainfall data in Korea.
4 Korea Forest Service (2010), Countermeasure for forest disaster in the summer season, Korea Forest Service Report, pp.21.
5 ASTM D5298-10, "Standard test method for measurement of soil potential using filter paper".
6 Brooks, R. H. and Corey, A. T. (1964), "Hydraulic properties of porous media", Colorado State Univ. Hydrol. Paper, No.3, pp.27.
7 Chatterjea, K. (1989), "Observation on the fluvial and slope processes in Singapore and their impact on the urban environment" PhD Thesis. National Univ. of Singapore, Singapore.
8 Cho, S.E. and Lee, S.R. (2000), "Slope stability analysis of unsaturated soil slopes due to rainfall infiltration" Journal of Korean Geotechnical Society. Vol.16, No.1, pp.51-64.   과학기술학회마을
9 Cho, S.E. and Lee, S.R. (2001), "Instability of unsaturated soil slopes due to infiltration", Computers and Geotehcnics, Vol.28, No.3, pp.185-208.   DOI   ScienceOn
10 Fourie, A.B., Rowe, D., and Blight, G.E. (1999), "The effect of infiltration on the stability of the slopes of a dry ash dump" Geotechnique, Vol.49, No.1, pp.1-13.   DOI   ScienceOn
11 Fredlund, D.G., Xing, A., and Huang, S. (1994), "Predicting the permeability function for unsaturated soils using the soil-water characteristic curve", Canadian Geotechnical Journal, Vol.31, pp.533-546.   DOI   ScienceOn
12 Fredlund, D.G. and Xing, A. (1994), "Equations for the soil-water characteristic curve", Canadian Geotechnical Journal, Vol.31, No.3, pp.521-532.   DOI   ScienceOn
13 Geo-slope International (2012), Seep/w for finite element seepage analysis, user's guide, Calgary, Alta., Canada.
14 Hwang, H.G., Cho, K.M., Lee, S.W., Kim, K.H., and Yune, C.Y. (2013), "Site Investigation on 2012 Slope Hazard in Korea and its Triggering Factors", 2013 KGS Spring National Conference, pp.117-120.
15 Lee, K.W., Kim, Y.M., Kim, J.H., and Jeong, S.S. (2012), "Distribution of matric suction for unsaturated soils based on filed measurement and soil-water characteristic curve test", 2012 KGS Fall National Conference, pp.587-529.
16 Lee, S.R., Oh, T.K., Kim, Y.K., and Kim, H.C. (2009), "Influence of Rainfall Intensity and Saturated Permeability on Slope Stability during Rainfall Infiltration", Journal of the Korean Geotechnical Society, Vol.25, No.1, pp.65-76.   과학기술학회마을
17 LEE, S.J. (2004), Estimation of Unsaturated Shear Strength and Soil Water Characteristic Curve for Weathered Granite Soil, PhD Thesis. Korea Advanced Institute of Science and Technology.
18 Jeong, S.S., Cho, J.Y., and Lee, J.H. (2009), "Stability Analysis of Unsaturated Weathered Soil Slopes Considering Rainfall Duration", Journal of the Korean Society of Civil Engineers, Vol.29, No.1, pp.1-9.   과학기술학회마을
19 Iverson, R.M. and Denlinger, R.P. (2001), "Flow of variably fluidized granular masses across three dimensional terrain: 1. Coulomb mixture theory", Journal of Geophysical Research, Vol.106(B1), pp.537-552.1   DOI
20 Jeong, S.S., Kim, J.H., and Lee, K.H. (2008), "Effect of clay content on well-graded snads due to infiltration", Engineering Geology, Vol.102, pp.74-81.   DOI   ScienceOn
21 Kim, J. H. (2010), Plasticity modeling and coupled finite element analysis for partially-saturated soils. Ph.D. Thesis, University of Colorado, Boulder, US.
22 Kim, J.H., Jeong, S.S., and Regueiro, R.A. (2012), "Instability of partially saturated soil slopes due to alteration of rainfall pattern", Engineering Geology, Vol.147-148, pp.28-36.   DOI   ScienceOn
23 Kim, J.H., Jeong, S.S., Park, S.W., and Sharma, J. (2004), "Influence of rainfall-induced wetting on the stability ok slopes in weathered soils", Engineering Geology, pp.251-262.
24 Soilworks (2013), Theoretical user's manual. MIDAS IT.
25 Marchi, L., Arattano, M., and Deganutti, A.M. (2002), "Ten years of debris-flow monitoring in the Moscardo Torrent (Italian Alps)," Geomorphology, Vol.46, pp.1-17.   DOI   ScienceOn
26 Ng, C.W.W. and Shi, Q. (1998), "A numerical investigation of the stability of unsaturated soil slopes subjected to transient seepage", Computers and Geotechnics Vol.22, No.1, pp.1-28.   DOI   ScienceOn
27 Vanapalli, S. K., Fredlund, D. G., Pufahl, D. E., and Clifton, A. W. (1996), "Model for the prediction of shear strength with respect to soil suction", Can. Geotech. J., Vol.33, pp.379-392.   DOI   ScienceOn
28 Pham, H.Q. and Fredlund, D.G. (2004), "New apparatus for the measurement of the soil-water characteristic curves", Proceedings of the 57th Canadian Geotechnical Conference, Quebec, Quebec City, Canada
29 Rahardjo, H., Li, X.E., Toll, D.G., and Leong, E.C. (2001), "The effect of antecedent rainfall on slope stability", Geotechnical and Geological Engineering. Vol.19, pp.371-399.   DOI   ScienceOn
30 Tan, S.B., Tan, S.L., Lim, T.L., and Yang, K.S. (1987), "Landslide problems and their control in Singapore." Proceedings of the 9th Southeast Asian Geotechnical Conference. vol.1 Bangkok, Thailand, pp.25-36.
31 van Genuchten, M. T. (1980), "A closed form equation for prediction the hydraulic conductivity of unsaturated soils", Soil Science Society America Journal, Vol.44, pp.892-898.   DOI   ScienceOn
32 Wei, J., Heng, Y.S., Chow, W.C., and Chong, M.K. (1991), "Landslide at Bukit Batok sports complex", Proceedings of the 9th Asian Conference on Soil Mechanics and Foundation Engineering. vol. 1. Balkema: Rotterdam; Bankok, Thailand. pp.445-448.
33 Yune, C.Y., Kim, K.S., Lee, S.W., Jun, K.J., and Kim, G.H. (2010), "Analysis of Slope Hazard-Triggering Rainfall Characteristics in Gangwon Province by Database Construction", Journal of the Korean Geotechnical Society, Vol.26, No.10, pp.27-39.   과학기술학회마을