Coefficient of permeability can be calculated using the equation Data collected during this test consist of the following: inside diameter of the cylindrical container for the soil sample Data: inside diameter of the standpipe length of the soil sample initial head reading inal head reading fime of collection Calculations: al k= 2.303 log 10 At ---- where: k = coefficient of permeability, cm/s L = iength of the soil sample, ĉm t = time required for hi to drop to h2 a = cross-sectional area of the standpipe A = cross-sectional area of the sample, cm2 hi = initial head.reading, cm h2 = final head reading, cm %3! %3D Data & Results: :14 cm :1.55 cm Length of Sample, Ls (cm) Diameter of Standpipe, dp (cm) :6.4 cm Diameter of Cylinder, Dc (cm) :8.86 sec Time, t (sec) :124 cm Upper Elevation, hl :74.5 cm Lower Elevation, h2 Coefficient of Permeability actual, ka (cm/s) Coefficient of Permeability standard, ks (cm/sec) :_actual *0.91

Coefficient of permeability can be calculated using the equation Data collected during this test consist of the following: inside diameter of the cylindrical container for the soil sample Data: inside diameter of the standpipe length of the soil sample initial head reading inal head reading fime of collection Calculations: al k= 2.303 log 10 At ---- where: k = coefficient of permeability, cm/s L = iength of the soil sample, ĉm t = time required for hi to drop to h2 a = cross-sectional area of the standpipe A = cross-sectional area of the sample, cm2 hi = initial head.reading, cm h2 = final head reading, cm %3! %3D Data & Results: :14 cm :1.55 cm Length of Sample, Ls (cm) Diameter of Standpipe, dp (cm) :6.4 cm Diameter of Cylinder, Dc (cm) :8.86 sec Time, t (sec) :124 cm Upper Elevation, hl :74.5 cm Lower Elevation, h2 Coefficient of Permeability actual, ka (cm/s) Coefficient of Permeability standard, ks (cm/sec) :_actual *0.91

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter17: Subsoil Exploration

Section: Chapter Questions

Problem 17.2P

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