Soil testing using a Chirp RC

Adolfo Cavallari

Abstract

The Resonant Column (RC) test is the standard to determine dynamic and static parameter of soils and rocks under different shear strain and confining conditions. The test consists of vibrating a cylindrical specimen in torsion establishing a fundamental mode, measuring the resonant frequency and amplitude of vibration with a frequency search. In order to minimize the spectral content beyond the used frequency range, borrowing a radar technique, a “Chirp” is used. This continuous modulation improves the system measurement performances, minimizing the effect of the number of cycles, reducing the test time and increasing the frequency resolution.

Keywords

Resonant, Chirp, Shear, Torsion, Soil

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IMEKO-TC4-2014-495.pdf

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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