A constant head permeameter has an internal diameter of 62.5 mm and is fitted in the side with three manometer tappings at points A, B and C (LaB = 120 mm; Lec = 125 mm). During tests on a specimen of sand the following data were recorded: Test No Quantity of water Manometer level above datum (mm) collected in 5 min (ml) | A В C 1 136.2 62 90 117 184.5 84 122 164 3 309.4 112 175 244 Determine the permeability of the soil (average all values excluding outliers).(6.33x104m/s)

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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A constant head permeameter has an internal diameter of 62.5 mm and is fitted in the side
with three manometer tappings at points A, B and C (LAB = 120 mm; LBc = 125 mm). During
tests on a specimen of sand the following data were recorded:
Test No
Quantity of water
Manometer level above datum (mm)
collected in 5 min (ml) A
В
C
1
136.2
62
90
117
184.5
84
122
164
3
309.4
112
175
244
Determine the permeability of the soil (average all values excluding outliers).(6.33x10“ m/s)
In a falling-head permeability test the following the apparatus was measured:
Internal diameter of the permeameter = 75.2 mm
Length of sample
Internal diameter of standpipe
= 122.0 mm
= 6.25 mm
The test data were recorded after 15 min between the initial and final levels in standpipe:
Initial level in standpipe (mm)
Final level in standpipe (mm)
247.0
Test No
1
750.0
725.0
235.0
3
760.0
251.0
Determine the permeability of the soil (average all values excluding outliers). (1.04 x 106 m/s)
Transcribed Image Text:A constant head permeameter has an internal diameter of 62.5 mm and is fitted in the side with three manometer tappings at points A, B and C (LAB = 120 mm; LBc = 125 mm). During tests on a specimen of sand the following data were recorded: Test No Quantity of water Manometer level above datum (mm) collected in 5 min (ml) A В C 1 136.2 62 90 117 184.5 84 122 164 3 309.4 112 175 244 Determine the permeability of the soil (average all values excluding outliers).(6.33x10“ m/s) In a falling-head permeability test the following the apparatus was measured: Internal diameter of the permeameter = 75.2 mm Length of sample Internal diameter of standpipe = 122.0 mm = 6.25 mm The test data were recorded after 15 min between the initial and final levels in standpipe: Initial level in standpipe (mm) Final level in standpipe (mm) 247.0 Test No 1 750.0 725.0 235.0 3 760.0 251.0 Determine the permeability of the soil (average all values excluding outliers). (1.04 x 106 m/s)
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