점토 함유량에 따른 점토질 모래의 투수 및 압밀 특성 평가 = Permeability and Consolidation Characteristics of Clayey Sand Soils

다국어 초록 (Multilingual Abstract)

Evaluation of permeability and coefficient of consolidation of clayey sand is critical in analyzing ground stability or environmental problems such as prediction of pollutant transport in groundwater. In this study, permeability tests using a flexible wall permeameter are performed to derive the coefficient of consolidation and permeability of reconstituted soil samples with various mixing ratios of kaolin clays and two different types of sands, which are Jumunjin and Ottawa sands. The test results indicate that the coefficient of consolidation and permeability plots linearly against clay contents in semi-log scale graphs for low clay mixing ratios ranging between 10 to 30%. It is also demonstrated that coefficient of consolidation and permeability of sand and clay mixture are dependent on the soil structure. Contrary to previous findings, the permeability is shown to be independent of the void ratio at low mixing ratios, which can be classified as non-floating fabric. The permeability decreases with the void ratio for floating fabric.

참고문헌 (Reference)

1 Hazen, A., "Water supply. American Civil Engineers Handbook" John Wiley & Sons 1930

2 Thevanayagam, S., "Undrained fragility of clean sands, silty sands, and sandy silts" 128 : 849-, 2002

3 Salgado, R., "Shear strength and stiffness of silty sand" 126 : 451-, 2000

4 Carraro, J., "Shear Strength and Stiffness of Sands Containing Plastic or Nonplastic Fines" 135 : 1167-, 1167

5 Kuerbis, R., "Sand sample preparation: the slurry deposition method" 28 (28): 107-118, 1988

6 Garcia-Bengochea, I., "Pore distribution and permeability of silty clays" 105 (105): 839-856, 1979

7 Kenney, T., "Permeability of compacted granular materials" 21 (21): 726-729, 1984

8 Carraro, J., "Mechanical Behavior of Non-Textbook Soils (Lliterature Review)" Joint Transportation Research Program 143-, 2004

9 Carraro, J., "Liquefaction resistance of clean and nonplastic silty sands based on cone penetration resistance" 129 (129): 965-976, 2003

10 Vaid, Y., "Liquefaction of silty soils" Ground failures under seismic conditions ASCE Geotechnical Sepcial Publication 1-16, 1994

11 Sridharan, A., "Hydraulic conductivity of remolded fine-grained soils versus index properties" 23 (23): 43-60, 2005

12 Sivapullaiah, P., "Hydraulic conductivity of bentonite-sand mixtures" 37 (37): 406-413, 2000

13 Bandini, P., "Effects of Silt Content and Void Ratio on the Saturated Hydraulic Conductivity and Compressibility of Sand-Silt Mixtures" 135 : 1976-, 1976

14 Thevanayagam, S., "Effect of fines and confining stress on undrained shear strength of silty sands" 124 (124): 479-491, 1998

15 Sridharan, A., "Consolidation and permeability behavior of segregated and homogeneous sediments" 24 (24): 109-120, 2001

16 Head, E., "Comparison of the chemical composition of particulate material and copepod faecal pellets at stations off the coast of Labrador and in the Gulf of St. Lawrence" 112 (112): 593-600, 1992

17 Sridharan, A., "Coefficient of consolidation and its correlation with index properties of remolded soils" 27 (27): 469-474, 2004

18 Raju, P., "Analysis and estimation of the coefficient of consolidation" 18 (18): 252-258, 1995

19 "ASTM D 2487-93 "Standard classification of soils for engineering purposes (Unified Soil Classification System)," Annual Book of ASTM Standards,. West Conshohocken, PA, ASTM International"

20 Samingan, A., "A flexible wall permeameter for measurements of water and air coefficients of permeability of residual soils" 40 (40): 559-574, 2003