6. The following data are for a falling-head permeability test: • Length of the soil sample = 140mm • Diameter of soil sample = 70 mm • Area of the standpipe = 19.6 mm? • At time t = 0, head difference 5 500 mm • At time t= 7 min, head difference 5 350 mm a. Determine the hydraulic conductivity of the soil (cm/sec). b. What was the head difference att=5 min?

6. The following data are for a falling-head permeability test: • Length of the soil sample = 140mm • Diameter of soil sample = 70 mm • Area of the standpipe = 19.6 mm? • At time t = 0, head difference 5 500 mm • At time t= 7 min, head difference 5 350 mm a. Determine the hydraulic conductivity of the soil (cm/sec). b. What was the head difference att=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

6. The following data are for a falling-head permeability test:
• Length of the soil sample = 140mm
• Diameter of soil sample = 70 mm
• Area of the standpipe = 19.6 mm?
At time t= 0, head difference 5 500 mm
At time t= 7 min, head difference 5 350 mm
%3D
a. Determine the hydraulic conductivity of the soil (cm/sec).
b. What was the head difference at t= 5 min?

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