Permeability Test for Granular Soils (Constant-Head Method) - Soil Properties: Testing, Measurement, and Evaluation - page 266

[B] Permeability Test

11.43 cm

(1) Length between manometer outlets, L

81.07 cm 2

(2) Cross-sectional area of soil specimen, A

Ratio of

Manometer

Quantity Viscosity

Readings

Head, of Water Time, Temper- Permeability at T°C Permeability

Trial h 1 h 2 h Discharged, t ature, at T°C, Viscosity at 20°C,

Q (cm 3 ) No. (cm) (cm) (cm) (s) T (°C) k T (cm/s) at 20°C k 20 (cm/s)

QL
Ath

(1) (2) (3) (4) (2) (3) (5) (6) (7) (8) = (9) (10) (8) (9)

1 10.9 5.4 5.5 250 65 23 0.0986 0.9311 0.0918

2 10.9 5.4 5.5 250 63 24 0.1017 0.9097 0.0925

3 10.9 5.4 5.5 250 64 24 0.1001 0.9097 0.0911

1
3

Average k 20 (0.0918 0.0925 0.0911)

0.0918 cm/s

or 9.18 10 2 cm/s

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