Browse > Article

Effect of Rainfall-Induced Infiltration on Unsaturated Weathered Soils with Varying Clay Contents  

유남동 ((주)도화종합기술공사, 지반공학부)
정상섬 (연세대학교 공과대학 토목공학과)
김재홍 (박사과정, 토목공학과)
박성완 (단국대학교 공과대학 토목공학과)
Publication Information
Journal of the Korean Geotechnical Society / v.20, no.8, 2004 , pp. 159-166 More about this Journal
Abstract
In this study, experiments on the SWCC were performed in order to find out the characteristics of unsaturated soil and to analyze the stability of unsaturated weathered slopes with rainfall-induced wetting. Several soil types classified by mixture portion of clay (CH) in the weathered soil (SW) were used in experimental tests. To achieve the SWCC, the filter paper method was used on SW with varying clay contents. A tensiometer test was used for measuring wetting front suction of the soils in a laboratory with varying relative densities. Based on the experimental results, it is shown that the wetting front suction increases as clay contest of mixture soil increases : in particular, the wetting front suction increases sharply as the clay contents increase. It is also found that wetting front suction affects the initial wetting band depth and stability of the slope.
Keywords
Clay contents; Filter paper; SWCC; Tensiometer; Unsaturated; Wetting band depth; Wetting front suction;
Citations & Related Records
연도 인용수 순위
  • Reference
1 김재흥, 정상섬 (2000), '강우시 불포화 사면의 안정성분석', 한국지반공학회, 제16권, pp.611-614
2 Krahn, J. & Fredlund, D. G. (1972), 'On total, matric and osmotic suction', J. Soil Science, 114, No.5, 339-349   DOI
3 Pradel, D, Raad, G. (1993), 'Effect of permeability on surficial stability of homogeneous slopes', J. Geotech. Eng. Div., Am. Soc. Civ. Engrs. 119(2), pp.315-332
4 조성은, 이승래 (2000), '강우특성을 고려한 사면의 표면파괴에 대한 안정성 평가', 한국지반공학회논문집, 제16권, 제5호, pp.107-116
5 류지협 (2003), '모관흡수력을 고려한 사면의 안정성 평가' 대한토목학회논문집 제23권, pp.195-201
6 Buckingham, E. (1907), 'Studies on the movement of soil moisture', U.S. Dept. of Agr. Bur. Soils Bull. 38
7 Bolt, G.H. and R.D. Miller. (1958) 'Calculation of total and component potentials of water in soil', Trans. Am. Geophys. Union 39 917-928   DOI
8 Leong, E. C., He, L., and Rahardjo, H. (1997), 'Review of Soil-Water Characteristic Curve Equations', Journal of Geotech-nical and Geoenvironmental Engineering, Vol.123, No.12, pp.1106-1117   DOI   ScienceOn
9 Vanapalli and Fredlund (1996), 'Model for the prediction of shear strength with respct to soil suction', Canadian Geotechnical Journal, 33: 379-392   DOI   ScienceOn
10 조성은, 이승래 (2001), '불포화 토사사면의 얕은파괴 해석에 대한 비교 연구', 한국지반공학회논문집, 제17권, 제4호, pp.135-143
11 Fredlund, M. D., Fredlund D. G., and Wilson G.W. (1997) 'Estimation Of Unsaturated Soil Properties Using A Knowledge-Based System', ASCE Fourth Congress on Computing in Civil Engineering Philadelphia, Pennsylvania June, pp.16-18
12 Daniel Pradel and Glen Raad (1993), 'Effect of Permeability on Surficial Stability of Homogeneous Slopes', Journal of Geotech-nical Engineering, ASCE, Vol.119, No.2, pp.315-332   DOI
13 김재흥 (2002), '강우시 습윤에 의한 불포화 풍화토의 사면 안정 해석 연구', 석사논문, 토목공학과 연세대학교.
14 Childs, E. C. et Collis-George, N. (1948), 'Interaction of water and porous materials', Soil Geometry and soil-water equilibria. Discussions paraday Soc. N3, pp.78-85
15 김상규, 류지협, 김동현 (1999), '불포화 풍화토의 침투 특성', 대한토목학회논문집 제19권, pp.995-1002
16 Fredlund, D. G. and Rahardjo, H. (1993), 'Soil Mechanics for Unsaturated Soils', John Wiley and Sons, Inc
17 Fredlund, D. G. and Anqing Xing (1994), 'Equations for the soil-water characteristic curve', Can. Geotech. J., Vol.31, pp.521-532   DOI   ScienceOn
18 김상규, 류지협 (2000), '불포화 풍화토의 강도특성', 대한토목학회논문집, 제20권, pp.109-118
19 Leong, E. C., He, L., and Rahardjo, H. (2002), 'Factors Affecting the Filter Paper Method for Total and Matric Suction Mea-surements', Journal of Geotechnical Testing, Vol.25, No.3 pp.321-332
20 Edlefsen. N.E. and A.B.C Anderson (1943), 'Thermodynamics ofsoil moisture', Hilgadia. 15