Investigation of small- to large-strain moduli correlations of rockfill materials — application to Romaine-2 dam

The establishment of relationships between the shear wave velocity (V s ) and other geotechnical parameters rockfills under large strains (e.g., oedometer-constrained modulus, M oedo , tangent elastic E t is a significant step toward precise modeling earth structure stress–strain behavior. In this study, four specimens reconstituted from rockfill used for Romaine-2 dam construction were investigated experimentally to correlate small-strain large-strain moduli. development V with consolidation was measured in laboratory using piezoelectric ring-actuator technique (P-RAT) incorporated oedometer cell. A correlation modulus (G o proposed. Moreover, numerical simulations performed Duncan–Chang hyperbolic model initial (E i ), which depends on minor principal stress (σ 3 ). Based experimental data, relationship established. Verification studies also situ measurements obtained construction, ability proposed predict demonstrated. correlations can help designers estimate deformation characteristics materials measurements.