volume 11, issue 2, P309-314 1974
DOI: 10.1139/t74-028
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Abstract: A review of the existing design criteria for protective filters indicates that for a given cohesionless base soil gradation of the filter material is not uniquely determined. From an analysis of available experimental results of filter tests, two equations are proposed for stable design of protective filters for cohesionless base soils. The proposed equations take into account the gradation of the base material and provide two points on the gradation curve of the filter material (the 10 and the 60% sizes) as …

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