Test No. 1 2 Diameter of specimen, D (cm) Length of specimen, L (cm) 6.35 6.35 6.35 13.2 13.2 3.2 Area of specimen, A (cm) 31.67 31.67 31.67 Beginning head difference, h1 (cm) Ending head difference, h2 (cm) Test duration, t (s) 75.0 70.0 65.0 34.0 25.0 20.0 20.4 19.3 15.4 Volume of water flow 74 68 57 through the specimen, Vw (cm³) 2.303V „L k = (h1-h2)tA (cm/s²) log h2 Average k = k20°c = krc ; %3! 120°C Temperature, T (°C) Variation of nrc/n2o°c Temperature, T (°C) /n20°c 1.135 /n20°C 0.931 15 23 16 1.106 24 0.910 17 1.077 25 0.889 18 1.051 26 0.869 19 1.025 27 0.850 20 1.000 28 0.832 21 0.976 29 0.814 22 0.953 30 0.797
Test No. 1 2 Diameter of specimen, D (cm) Length of specimen, L (cm) 6.35 6.35 6.35 13.2 13.2 3.2 Area of specimen, A (cm) 31.67 31.67 31.67 Beginning head difference, h1 (cm) Ending head difference, h2 (cm) Test duration, t (s) 75.0 70.0 65.0 34.0 25.0 20.0 20.4 19.3 15.4 Volume of water flow 74 68 57 through the specimen, Vw (cm³) 2.303V „L k = (h1-h2)tA (cm/s²) log h2 Average k = k20°c = krc ; %3! 120°C Temperature, T (°C) Variation of nrc/n2o°c Temperature, T (°C) /n20°c 1.135 /n20°C 0.931 15 23 16 1.106 24 0.910 17 1.077 25 0.889 18 1.051 26 0.869 19 1.025 27 0.850 20 1.000 28 0.832 21 0.976 29 0.814 22 0.953 30 0.797
Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN:9781337705028
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Braja M. Das, Nagaratnam Sivakugan
Chapter3: Natural Soil Deposits And Subsoil Exploration
Section: Chapter Questions
Problem 3.19P
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FALLING HEAD PERMEABILITY TEST
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