A constant-head test was conducted on a sample of soil 15cm long and 60 cm^2 in cross-sectional area. The quantiities of water collected was 50 cm^3 in 20 seconds undera a head difference of 24 cm. Calculate the hydraulic conductivity. If the porosity of sand is 55%, calculate the average velocity and the seepage velocity. Estimate the hydraulic conductivity of a similar soil with a porosity of 35% from the results test. Please show all work!!

A constant-head test was conducted on a sample of soil 15cm long and 60 cm^2 in cross-sectional area. The quantiities of water collected was 50 cm^3 in 20 seconds undera a head difference of 24 cm. Calculate the hydraulic conductivity. If the porosity of sand is 55%, calculate the average velocity and the seepage velocity. Estimate the hydraulic conductivity of a similar soil with a porosity of 35% from the results test. Please show all work!!

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Laboratory Determination of Hydraulic Conductivity

Hydraulic conductivity is the measure of flowability of water inside the soil in the presence of a hydraulic gradient. The hydraulic gradient is defined as the difference in the water heads in the soil, which induces a water motion. In simple terms, a hydraulic gradient is the presence of a potential that induces a flow of water.

Question

A constant-head test was conducted on a sample of soil 15cm long and 60 cm^2 in cross-sectional area.
The quantiities of water collected was 50 cm^3 in 20 seconds undera a head difference of 24 cm. Calculate
the hydraulic conductivity. If the porosity of sand is 55%, calculate the average velocity and the seepage
velocity. Estimate the hydraulic conductivity of a similar soil with a porosity of 35% from the results test.
Please show all work!!

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The following results were recorded during a Falling head permeability test: Sample diameter = 120 mm Sample length = 140 mm Initial head = 510 mm Final head = 310 mm Standpipe diameter = 6 mm Duration of flow = 3.4 mins Determine the coefficient of permeability for the soil in m/s. Based on the coefficient of permeability estimate the soil type
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Correct answer.
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