Determination of elastic Coefficients by using seismic down-hole methods for geotechnical purposes – Case Study

Abstract

 Seismic down-hole method was applied to investigate dynamic characteristics of subsurface geological structure for geotechnical proposes, by analyzing recorded first arrivals of P waves and S waves, which was used  to determine the seismic velocity (Vp, Vs) up to 30m depth. The calculated seismic velocities, measured densities in the boreholes and Win_DownHole software was used to obtain the young Modulus,  poison ratio, shear modulus, bulk modulus. Analysis of the results and correlate it  with litho-logical situation appear the benefits of used method to represent the elastic characteristics of  subsurface structures and insure that the study area is affected by collapses or cavities at various depths of  the bore holes.