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Shear and compression wave velocities of an unsaturated sandy soil
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This paper presents and discusses results of isotropic compression tests in which piezoelectric transducers generated shear and compression waves that traveled through unsaturated specimens of a clayey sandy soil. The tests were carried out in a Bishop-Wesley type triaxial apparatus that was instrumented with local Hall-effect transducers and a pair of bender-extender elements. Results showed the very small-strain response of the compacted and undisturbed soil samples to shear and compression waves. The waveforms clearly showed the arrival of the compression waves, however, near-field effects were observed in the shear waves. The travel times of both shear and compression waves decreased with suction and confining stress. Simple power correlations nicely fitted the experimental velocity data as a function of net confining stress. The compacted specimens showed larger shear and compression wave velocities in comparison to the undisturbed specimens, due to the larger void ratio of the undisturbed soil.
Title: Shear and compression wave velocities of an unsaturated sandy soil
Description:
This paper presents and discusses results of isotropic compression tests in which piezoelectric transducers generated shear and compression waves that traveled through unsaturated specimens of a clayey sandy soil.
The tests were carried out in a Bishop-Wesley type triaxial apparatus that was instrumented with local Hall-effect transducers and a pair of bender-extender elements.
Results showed the very small-strain response of the compacted and undisturbed soil samples to shear and compression waves.
The waveforms clearly showed the arrival of the compression waves, however, near-field effects were observed in the shear waves.
The travel times of both shear and compression waves decreased with suction and confining stress.
Simple power correlations nicely fitted the experimental velocity data as a function of net confining stress.
The compacted specimens showed larger shear and compression wave velocities in comparison to the undisturbed specimens, due to the larger void ratio of the undisturbed soil.
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