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Hydraulic Conductivity (Coefficient of Permeability) Formulas
- Thread starter ditapark
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We perform remolded falling-head tests in the Florida panhandle for retention pond design. We encounter primarily poorly graded fine sands [SP, SP-SM] in our area. We use the formula: k=2.303(aL/At) 〖log〗_10 (h_1/h_2)
Remolded samples, in my opinion, are not real accurate. I sometimes push tubes to perform permeability testing on; however, it is difficult to obtain an 'undisturbed' sample of sandy material.
You can also find relationships for hydraulic conductivity for cohesive and granular soils in most geotechnical textbooks. These relationships use void ratio, and grain size and gradation to estimate the hydraulic conductivity. I would not use these for design though.
Remolded samples, in my opinion, are not real accurate. I sometimes push tubes to perform permeability testing on; however, it is difficult to obtain an 'undisturbed' sample of sandy material.
You can also find relationships for hydraulic conductivity for cohesive and granular soils in most geotechnical textbooks. These relationships use void ratio, and grain size and gradation to estimate the hydraulic conductivity. I would not use these for design though.
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