Compression and shear wave velocities of unsaturated soils

In this report, an ultrasonic velocity test system consisting of compression and shear wave transducers, a pulser and a data acquisition system was used to obtain the compression and shear wave velocities of three different soil types. The pressure plate test was also conducted to determine the chan...

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Bibliographic Details
Main Author: Wee, Rayner Jian De.
Other Authors: Leong Eng Choon
Format: Final Year Project
Language:English
Published: 2009
Subjects:
Online Access:http://hdl.handle.net/10356/16091
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Institution: Nanyang Technological University
Language: English
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Summary:In this report, an ultrasonic velocity test system consisting of compression and shear wave transducers, a pulser and a data acquisition system was used to obtain the compression and shear wave velocities of three different soil types. The pressure plate test was also conducted to determine the change in water content over various matric suction values. The effects of degree of saturation, the compression and shear wave velocities were investigated. Gassmann equation was found to be inadequate in estimating the P-wave velocity. A modification to Gassmann equation still underestimates the P-wave velocity by 22% to 63%.