Seepage and Slope Stability HO3

Seepage and Slope Stability HO3 - CE 563, Seepage & Slope...

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EM 1110-2-1901 30 Sep 86 b. Masch and Denny Method. For uniform or nonuniform dense clean sands, classified SP or SW in the Unified Soil Classification System (U. S. Army Engineer Waterways Experiment Station 1960), the permeability may be estimated from an empirical method developed by Masch and Denny 1966, and Denny 1965. The gradation curve is plotted in Krumbein 4 units (Krumbein and Pettijohn 1938) (using the chart in figure 2-13) as shown in figure 2-14 where (2-23) where = phi scale units used to describe grain size distribution d = grain size diameter in mm The inclusive standard deviation is used as a measure of the spread of the gradation curve where (Masch and Denny 1966) where = inclusive standard deviation d 16 = grain size in units at which 16 percent is finer d 84 = grain size in units at which 84 percent is finer d 5 = grain size in units at which 5 percent is finer d 95 = grain size in units at which 95 percent is finer (2-24) 2-23 Lecture 03 Page 1 of 4
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EM 1110-2-1901 30 Sep 86
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This note was uploaded on 02/03/2012 for the course CIVIL ENGI 563 taught by Professor Seepage during the Spring '11 term at Idaho.

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Seepage and Slope Stability HO3 - CE 563, Seepage & Slope...

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