THE USE OF MICROTREMORS FOR SOIL AND SITE CHARACTERISATION AND MICROZONATION APPLICATIONS

摘要

The Microtremor Exploration Method (MEM) is an innovative, alternative method for the determination of Vs profiles and subsoil geometry for site and soil characterization. Using the Spatial Autocorrelation Method (SPAC) a circular array of few broadband instruments allows the accurate determination of Vs profiles. A Rayleigh wave inversion scheme was applied following the determination of phase velocity dispersion curves for different frequency range windows. The Vs profiles combined with other geotechnical data and simultaneous HVSR measurements allowed the construction of 3D geotechnical maps, describing the Vs velocities of the stratigraphy of the soil formations from the surface till the seismic bedrock.