Soil Dynamic Parameters Determination by Waves Spectral and Correlation Analysis

Assessment of soil dynamic parameters via wave propagation method utilizing results of theoretical and experimental analysis of elastic or visco-elastic waves. The theory underlying the problem of stress-wave propagation in half space medium is based on the assumption of an application of the impulse-seismic methods (ISM) or the phase velocity method. In this paper is only outlining the basic of the theoretical subject which is necessary for experimental applications. ISM experimental study of ground stress-wave propagation permits the ground to be modelled as a damped, viscoelastic half space. The viscoelastic model of soil simulation using the complex modulus conception, offers a very good approach to the actual soil behavior. The paper also presents the experimental ISM tests procedure in-situ and results obtained by correlation and spectral analysis. As an example, the finite element method (FEM) was in a case study also used for modelling the body and surface wave propagation processes in the ground modelled as an elastic medium.