The geophysical methods as indirect way of characterisation of some properties can help a lot but cannot solve all problems. In geotechnical characterisation, the biggest aplication has the seismic methods (refraction, reflection, cross hole etc.).Mesauring velocities of longitudinal and shear waves you can calculate dynamic modulus of elasticity which can be combined with static modulus of deformation (D) or rock mass quality (RMR, Q and others).Cross hole methods can be combined with SPT value N30. On the other side, shear wave velocities are a parameter which is use to determine soil chategory in EUROPEAN CODES for Design. For instance for geotechnics the so called Eurocode 7 is valid as well as Eurocode 8 for dynamical analyses. In generall they can be very useful but the resilts shall be checked with direct testing methods. Through correlation they can give usefull data. Geoelectrical methods can help in determination of soil profile and indication of groudwater level. I have an article in my rsearch profile about combination of cross hole methods with SPT value, as well as geotechnical moddeling for arch dam Sveta petka,and ERMR system for excavation wher you can see some correlations. Also, look on Nick Barton articles to see estimation of Rock quality Q with seismic waves values.

Thank you for the valuable information.

Do you think passive seismic can do the same job ? 

My experiences tell me all these geophysical methods help researchers to initially identify the nature of the targeted geo-materials but in a later detailed design stage core samples from geological boreholes would still require for laboratory tests that are used to determine the physical and mechanical parameters of the geo-materials.