ABSTRACT
Various projects related to gas hydrate, such as methane hydrate resource development and carbon dioxide underground storage using gas hydrate, are attracting attention. Various laboratory tests have been conducted using artificially prepared hydrate-containing sand samples to investigate the mechanical properties of gas hydrate-containing ground. In this study, we focused on the hydrate formation process and morphologies, and prepared CO2 hydrate-bearing sand specimens by the dissolved gas method. In addition, undrained triaxial compression tests were performed using the prepared specimens. From the test results, hydrate-bearing specimens with the value of hydrate saturation ranged from 3.4% to 8.8% were made. The stress-strain behavior and the effective stress path were almost the same as that of the hydrate-free specimen.
