.-Falling head permeability test, given soil sample: length is 50.8 cm, area=10.17 cm², area of stand pipe=1.3cm2 , head at time zero(to)=76.2cm. head at time 10 min=30.5cm.a) Find hydraulic conductivity of the soil sample blwhat was the head difference at 5 min

.-Falling head permeability test, given soil sample: length is 50.8 cm, area=10.17 cm², area of stand pipe=1.3cm2 , head at time zero(to)=76.2cm. head at time 10 min=30.5cm.a) Find hydraulic conductivity of the soil sample blwhat was the head difference at 5 min

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

.-Falling head permeability test, given soil sample: length is 50.8 cm,
area=10.17 cm², area of stand pipe=1.3cm2 , head at time
zero(to)=76.2cm. head at time 10 min=30.5cm.a) Find hydraulic
conductivity of the soil sample. b)what was the head difference at 5 min.

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Problem: For a constant laboratory permeability test on a fine sand, the following data are given: Length of specimen - 16 cm Diameter of specimen - 9.6 cm Constant head difference - 50 cm Volume of water collected in 4 min - 420 cc Void ratio of the soil specimen - 0.55 A.) Determine the hydraulic conductivity of the soil in cm/sec B.) Determine the discharge velocity in cm/sec C.) Determine seepage velocity in cm/sec Problem: For a falling head permeability test, the following are given: Length of Soil Specimen - 200mm Area of Soil Specimen - 1000mm^2 Area of Stand pipe - 40mm^2 Head Difference at time t = 0 min - 500mm Head Difference at time t = 3 min - 300mm A.) Compute hydraulic conductivity of the soil in cm/sec B.) Compute the seepage velocity if the porosity is 0.25 in cm/sec C.) What is the head difference at time t = 100 sec in mm