Triaxial test device for deep-sea coring retaining in-situ condition suitable for shipborne laboratory

A triaxial test device for deep-sea coring retaining in-situ condition suitable for a shipborne laboratory, comprising:

• a sample transfer system, configured to remove a natural gas hydrate sample from a tube and send the natural gas hydrate sample to a triaxial machine system, wherein the sample transfer system comprises:
• a sample cylinder configured to receive the natural gas hydrate sample,
• a tube-removing piston arranged in the sample cylinder and configured to push the sample to enter a triaxial machine system,
• a ball valve, the sample cylinder being connected to the ball valve through bolts, and
• a connector, and
• a triaxial machine system, configured to implement a triaxial test of the natural gas hydrate sample in a vacuum condition, wherein the triaxial host machine system comprises:
• a bottom interface hermetically connected to the sample cylinder through the connector,
• a rubber cylinder in communication with the bottom interface,
• a triaxial inner wall, the rubber cylinder being arranged in an inner cavity of the triaxial inner wall
• a triaxial outer wall located at a periphery of the triaxial inner wall and having a water inlet and a water outlet, wherein circulating cold water communicates with the water inlet and the water outlet, and
• a top interface;
• wherein the sample is sent into the rubber cylinder for a triaxial compression test, and the triaxial inner wall is filled with seawater for guaranteeing a test pressure.