Solve Please A sand sample of 25 cm length was subjected to a constant head permeability test in a permeameter having an area of 30 cm². A discharge of 100 cm³ was obtained in a period of 1 minute under a head of 39 cm. Mass of dry sand in the sample was 1350 gm. The specific gravity of sand particles was 2.67. Determine: (i) the coefficient of permeability (ii) the superficial velocity (iii) the seepage velocity

Solve Please A sand sample of 25 cm length was subjected to a constant head permeability test in a permeameter having an area of 30 cm². A discharge of 100 cm³ was obtained in a period of 1 minute under a head of 39 cm. Mass of dry sand in the sample was 1350 gm. The specific gravity of sand particles was 2.67. Determine: (i) the coefficient of permeability (ii) the superficial velocity (iii) the seepage velocity

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

Solve Please
A sand sample of 25 cm length was subjected to a constant head permeability test in a
permeameter having an area of 30 cm². A discharge of 100 cm³ was obtained in a period
of 1 minute under a head of 39 cm. Mass of dry sand in the sample was 1350 gm. The
specific gravity of sand particles was 2.67. Determine:
(i) the coefficient of permeability
(ii) the superficial velocity
(iii) the seepage velocity

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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