Seepage-Induced Acoustic Emission in Granular Soils

Abstract

This technical paper presents the results of a study on detecting excessive seepage in granular soils by monitoring the seepage-induced acoustic emission (AE). The laboratory experiments and data analyses were performed using specially designed data acquisition instruments and computer-based data analysis devices. The monitored data were analyzed using three methods, namely, amplitude, time, and frequency domain analyses. The analysis results showed that the seepage-induced AE in the test soils were broadband Gaussian signals which were zero mean, normally distributed, and leptokurtic. All of the measured autospectral density functions showed that the most prominent AE activities occurred within a frequency range of about