Spectral analysis of surface waves and seismic refraction for the inspection of tunnel walls

Abstract

The new approach originally developed for near-critical binary mixtures [1-2] has been generalized for multicomponent mixtures. Instead of the classical methods based on the updated theory of slightly non-ideal gases, this approach is based on the theory of universal critical behavior in fluids in wide vicinity of their critical points. Within the frames of the proposed method a dew-bubble curve for ternary mixture has been found in simple analytical form. The special points of dew-bubble curve were investigated. The agreement between developed approach and obtained experimental data is observed.