Determination of Geologic and Seismic Rock Mass Properties of Eastern Pontide Eocene-Neocene Volcanic Rocks

Shear wave velocity, obtained from surface wave analysis and distribution of longitudinal wave velocity, obtained from refraction tomography is constantly used to determine dynamic elastic properties of the underground layers and soil response. In recent years, many investigations have been carried out to determine the response of the subsurface structure to dynamic strengths in areas where multi-storey buildings are thought to be constructed. This study was performed in the county of Trabzon, Cukurcayır, in the Eastern Black Sea region. It was tried to determine the geological and seismic properties of the Eocene- Neocene aged volcanic rocks in the region. In the study area, seismic data were collected at 10 profiles for refraction tomography and surface wave analysis. Velocity distributions and depth of bedrock were determined from seismic data. In addition, six boreholes were drilled in the study area, and 23 core samples were collected to conduct laboratory tests. The laboratory study was conducted to determine ultrasonic velocities, uniaxial comprehensive strength, and porosity values for each core. Thus, Rock Quality Designation (RQD) values were calculated from borehole cores. The data, obtained from field and laboratory tests, were interpreted in terms of construction.