A series of triaxial compression tests was performed on undisturbed gravelly soils that were retrieved from two tunnel excavation sites in Toyama prefecture, Japan. At each site, cylindrical samples having a dimension of 30 cm in diameter and about 100 cm in height were retrieved from the excavated base by employing a special coring method using thick water-soluble polymer. A specimen having a height of 50 to 60 cm was trimmed from these samples, and it was set to a large-scale triaxial testing apparatus. In the course of isotropic consolidation and drained triaxial compression, small strain deformation properties were measured by both static and dynamic methods and compared to each other. As a result, small strain Young's moduli and shear moduli which were obtained by static and dynamic measurements, respectively, increased with the increase in the effective stress levels in a manner that was similar to each other.