Author(s)

C. Vrettos

Abstract

Seismic refraction survey for continuously nonhomogeneous soils C. Vrettos Technical University of Berlin, Geotechnical Engineering Institute, 1000 Berlin 12, Germany ABSTRACT The analysis of seismic refraction is presented for uniformly deposited soil strata of constant density and Poisson's ratio and stiffness increasing continuously with depth due to differential compaction effects. Analytical expressions for the surface-to-surface travel time as well as for the depth to maximum penetration are presented for realistic functions of the varia- tion of the soil stiffness with depth. Approximate formulas are also given for practical use in nondestructive subsoil investigation. The results may be used either to determine in-situ elastic soil properties directly from refraction surveys or to support and verify conventional surface wave vi- bration tests. INTRODUCTION Although dispersion measurements have gained in popularity during the last decade, seismic re

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