한국농공학회논문집 (Journal of The Korean Society of Agricultural Engineers)

  • 제48권4호
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  • Pages.51-57
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  • 2006
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  • 1738-3692(pISSN)
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  • 2093-7709(eISSN)
한국농공학회 (The Korean Society of Agricultural Engineers)
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불포화토에서 공극비의 추정

The Prediction of Void Ratio in Unsaturated Soils

  • 이달원 (충남대학교 농업생명과학대학 지역환경토목전공)
  • 발행 : 2006.07.01
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초록

This study was carried out to investigate the soil water characteristic curve and prediction of void ratio with net stress and matric suction using the linear elastic and volumetric deformation analysis method on unsaturated silty. The unsaturated soil tests were conducted using a modified oedometer cell and specimens were prepared at water content 2 times of liquid limit and required void ratio. The axis translation technique was used to create the desired matric suctions in the samples. It is shown that soil water characteristic curve and volumetric water content were affected significantly by preconsolidation pressure. As a matric suction increases, the reduction ratio of void ratio was shown to considerably small. Also, the predicted and measured void ratio for unsaturated soils using the linear elastic and volumetric deformation analysis showed good agreement as net stress and matric suction increases.

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참고문헌

  1. Ausilio, E. and E. Conte, 1999, Settlement rate of foundation on unsaturated soils, Can. Geotech. J, 36 (5): 940-946 https://doi.org/10.1139/cgj-36-5-940
  2. Conte, E., 2004, Consolidation analysis for unsaturated soils, Can. Geotech. J, 41 (4): 599-612 https://doi.org/10.1139/t04-017
  3. Fredlund. D. G. and N. R. Morgenstern, 1976, Constitutive relations for volume change in unsaturated soils, Can. Geotech. J, 13: 261-276 https://doi.org/10.1139/t76-029
  4. Fredlund. D. G. and N. R. Morgenstern, 1977, Stress state variables for unsaturated soils, J of Geotech. Engrg. ASCE, 103 (GT5) : 447-466
  5. Fredlund. D. G., N. R. Morgenstern and R. A. Widger, 1978, The shear strength of unsaturated soils, Can. Geotech. J, 15(3): 313-321 https://doi.org/10.1139/t78-029
  6. Fredlund. D. G., 1979, Second Canadian Geotechnical Colloquium: Appropriate concepts and technology for unsaturated soils, Can. Geotech. J., 16: 121-139 https://doi.org/10.1139/t79-011
  7. Fredlund. D. G. and J. U. Hansan, 1979, One-dimensional consolidation theory: unsaturated soils, Can. Geotech. J., 16: 521-531 https://doi.org/10.1139/t79-058
  8. Fredlund. D. G., 2000, The 1999 R. M. Hardy Lecture; The implementation of unsaturated soil mechanics into geotechnical engineering, Can. Geotech. J., 37 (5): 963-986 https://doi.org/10.1139/cgj-37-5-963
  9. Khalili, N., F. Geiser and G. E. Blight, 2004, Effective stress in unsaturated soils: Review with new evidence, International J. of Geomechanics, ASCE, 4(2): 115-126 https://doi.org/10.1061/(ASCE)1532-3641(2004)4:2(115)
  10. Loret, B. and N. Khalili, 2002, An effective stress elastic-plastic model for unsaturated porous media, Mechanics of Materials, 34: 97-116 https://doi.org/10.1016/S0167-6636(01)00092-8
  11. Ng. A. K. L, and J. C. Small, 2000, Use of coupled finite element analysis in unsaturated soil problems. Int. J. Numer. Anal. Meth. Geomech., 24: 73-94 https://doi.org/10.1002/(SICI)1096-9853(200001)24:1<73::AID-NAG54>3.0.CO;2-Y
  12. Wong, T. T., D. G. Fredlund and J. Krahn, 1998, A numerical study of coupled consolidation in unsaturated soils, Can. Geotech. J., 36 (6): 926-937