1. The figure shows layers of soil in a tube that is 100mm x 100mm in cross – section. Water3. For a constant head laboratory permeability test on a fine sand, the followiis supplied to maintain a constant head difference of 400mm across the sample. Thegiven:hydraulic conductivities of the soils in the direction of flow through them are as follows:Soilk (cm/sec)Porosity, nLength of specimen300 mmA1x 10-225%Diameter of specimen200 mm3х 10332%Head difference400 mmC4.9 x 10-422%Volume of water collected in 4 minutes420 m3Void ratio of the soil specimen0.55Water supplyContinuoussupplyOverflowConstant headdifference = 400 mm400 mmAB-soil.sample300 mm Porous plate150 mm 150 mmHorizontal areaof soil sample200 mm200 mma. Calculate the equivalent k in cm/sec.a. Compute the coefficient of permeability in cm/sec.b. Calculate the rate of water supply in cm³/hr.b. Compute the discharge velocity in cm/sec.c. Calculate the seepage velocity through soil C in m/sec.c. Compute the seepage velocity.

3. For a constant head laboratory permeability test on a fine sand, the followi given: Length of specimen 300 mm Diameter of specimen 200 mm Head difference 400 mm Volume of water collected in 4 minutes 420 m³ Void ratio of the soil specimen 0.55 Continuous supply Overflow 400 mm soil 300 mm Porous plate jample Horizontal area of soil sample 200 mm a. Compute the coefficient of permeability in cm/sec. b. Compute the discharge velocity in cm/sec. c. Compute the seepage velocity.

3. For a constant head laboratory permeability test on a fine sand, the followi given: Length of specimen 300 mm Diameter of specimen 200 mm Head difference 400 mm Volume of water collected in 4 minutes 420 m³ Void ratio of the soil specimen 0.55 Continuous supply Overflow 400 mm soil 300 mm Porous plate jample Horizontal area of soil sample 200 mm a. Compute the coefficient of permeability in cm/sec. b. Compute the discharge velocity in cm/sec. c. Compute the seepage velocity.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter6: Hydraulic Conductivity

Section: Chapter Questions

Problem 6.7P

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