Permeability of Layered Soils: An Extended Study
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The coefficient of permeability of stratified soil deposits, when the flow is normal to the orientation of the bedding planes, has been observed to deviate from the value calculated theoretically. This deviation has been successfully explained in the past for a two-layer soil system by considering the coefficient of permeability of the exit layer as the controlling factor. The present technical note deals with the results from the study of permeability behavior of three-layer soil system. This study reinforces the point that the coefficient of permeability of a layered soil system, when the flow is normal to the orientation of the bedding planes, depends upon the relative positioning of the layers with different values of coefficient of permeability in the system.
KeywordsClays Laboratory tests Layered soil system Permeability
- ASTM Designation D 5084–90 (1995) Standard method for measurement of hydraulic conductivity of saturated porous materials using a flexible wall permeameter. Annual Book of ASTM Standards, vol 04.09. ASTM International, West Conshohocken, PAGoogle Scholar
- Hansbo S (1960) Consolidation of clays with special reference to influence of vertical sand drains. Swed Geo-tech Ins Proc, Stockholm 18:41–61 Google Scholar
- Law KT, Lee CF (1981) Initial Gradient in a dense glacial till. In: Proceedings of 10th international conference on soil mechanics and foundation engg, Stockholm, vol 1, pp 441–446Google Scholar
- Sridharan A, Prakash K (2002) Permeability of two-layer soils. Geotech Test J, ASTM 25(4):443–448Google Scholar