Show calculation on how to determine the average coefficient of permeability of the sand sample at 20°C.Also show calculations on how to determine the discharge the K1 and Average K1 Complete the Constant Head Permeability Test Data Sheet.Description of soil: Fine SandLength of Specimen (L): 127 mmArea of Specimen (A): 7,854 mm²Specific Gravity of soil (G.): 2.65Temperature of water: 30 °CTest No.123Average flow, Q (mm³)Time of collection, t (s)Head difference, h (cm)32,40066,00096,300150300450300300300Hydraulic GradientDischarge, q (mm³/s)K; (mm/s)Average K,2.362.362.36

Solution: Given Data Length of specimen=127 mmArea of specimen=7854 mm2Specific gravity of…

Answered: Show calculation on how to determine…

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Show calculation on how to determine the average coefficient of permeability of the sand sample at 20°C. Also show

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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Concept explainers

Field applications of hydraulic conductivity

Hydraulic conductivity is one of the hydraulic properties of soil defined as a measurement of the ability of a porous medium to permit water movement or fluid flow through it. It is denoted by the letter K. It is influenced by the density and viscosity of the fluid. It is also called permeability. Hydraulic conductivity is defined as the ratio of velocity to the hydraulic gradient. The different methods used to determine the hydraulic conductivity are laboratory methods (constant head permeability tests and falling head tests), in-situ field methods (pumping in and pumping out tests), small scale field tests (infiltration tests and slug tests), and indirect methods such as estimation from grain size, consolidation test data, and horizontal capillary test. The pedotransfer function (PTF) method is a specific empirical estimating approach employed in the soil sciences is also used to determine the hydraulic conductivity of the soil.

Question

Show calculation on how to determine the average coefficient of permeability of the sand sample at 20°C.

Also show calculations on how to determine the discharge the K1 and Average K1

Complete the Constant Head Permeability Test Data Sheet.
Description of soil: Fine Sand
Length of Specimen (L): 127 mm
Area of Specimen (A): 7,854 mm²
Specific Gravity of soil (G.): 2.65
Temperature of water: 30 °C
Test No.
1
2
3
Average flow, Q (mm³)
Time of collection, t (s)
Head difference, h (cm)
32,400
66,000
96,300
150
300
450
300
300
300
Hydraulic Gradient
Discharge, q (mm³/s)
K; (mm/s)
Average K,
2.36
2.36
2.36

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