Abstract

In geotechnical studies the estimation of elastic moduli of the subsoil through its seismic velocities is very important for the design of foundations and structures. This study discusses the Crosshole seismic and borehole deviation survey to evaluate the elastic moduli of the subsurface sediments for the design of foundations for a nuclear power project. Crosshole seismic studies are done to compute compressional (P) and shear (S) wave velocities upto a depth of 51 m. The results at reactor site show that the P-wave velocity varies from 442.27 m/s to 1287.33 m/s while the S-wave velocity show a variation of 228.44 m/s to 627.66 m/s. The Young modulus from 0.29 GPa to 1.62 GPa, the Bulk Modulus from 0.19 GPa to 1.58 GPa, the Shear modulus from 0.12 GPa to 0.62 GPa and the Poison