ABSTRACT
The design of geotechnical structures requires an accurate assessment of the strain moduli of the grounds. Experience shows that these depend on the range of strain considered. In particular, for dynamic problems (e.g. vibrations induced by the excavation of a tunnel), the maximum shear modulus Gmax has to be estimated. To contribute to this topic, the results of surface wave measurements under ambient noise (H/V method), cross-hole tests, resonant column tests and pressuremeters tests performed in various clay and marl formations in the Paris subsoil are presented. The analysis concerns the relationship between these different types of measurements and their comparison with data in the literature.
