Abstract:

The shear wave velocity (Vs) is one of the important parameters in the study of determining geotechnical engineering problems. In the dynamic field classification, the shear wave velocity is important for the first 30 meters’ depth from the surface. Therefore, the shear wave velocity (VS30) and the SPT-N value are necessary for earthquake engineering studies such as ground behavior, ground-structure interaction. The shear wave velocity of soil can be determined using seismic methods such as seismic refraction and in-downhole seismicity in the field. But, these methods are time-consuming and uneconomical methods, requiring a large workforce. For this reason, many studies use empirical approaches that calculate Vs depending on the number of SPT-N. However, these approaches have been made in different fields of study. Because the soil conditions differ, it is necessary to determine the accuracy of these approaches for the Eskisehir ground. In this study, the real Vs values determined using seismic methods within the scope of land studies in Eskişehir, and the Vs values calculated from the SPT-N values obtained from drilling operations representing the Eskişehir ground were compared. As a result, most suitable method was determined statistically. 

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