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Coefficient of Permeability

# Coefficient of Permeability - Coefficient of...

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Coefficient of Permeability-Falling-Head Method Vanessa Barela Student ID# 900240959 Group Members: Christine Dwyer Anthony LeBaron Sarah Gonzales Phil Simmons Date of Test: February 23, 2007 Date Submitted: March 29, 2007

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Introduction The coefficient of permeability is found in fine-grained soils, but can also be used for course-grained soils. This method involves a flow of water through a soil sample for a fixed volume of soil and water. The water is timed until the volume is zero. From this data, a coefficient of permeability can be calculated. This test is important for determining void ratio and the rate of seepage can be determined. Theory The falling-head method determines the coefficient of permeability for a fine-grained soil by using a flow through a soil sample. The sample is placed in a test mold, which is sealed from seepage. After this, water flows across the sample and is timed. The equation that is applicable to this test is 2 1 ln h h At aL k = cm/s a=cross-sectional area of buret
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Coefficient of Permeability - Coefficient of...

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