Precast, prestressed concrete cryogenic tanks-sliding base insulation system and method for full and double containment systems

A cryogenic storage system, comprising:

• a primary container;
• a first insulation layer disposed below a primary bottom of the primary container:
• a secondary container disposed outward of the primary container;
• and
• a secondary bottom disposed below the primary bottom of the primary container, where the secondary bottom is coupled to the secondary container through an expansion joint, and where the expansion joint is configured to permit an expansion and a retraction of the secondary bottom independent from the secondary container,
• wherein the secondary bottom includes a sand layer below the primary container and a slide bearing below the secondary container.

A cryogenic storage system, comprising:

• a primary container:
• a first insulation layer disposed below a primary bottom of the primary container;
• a secondary container disposed outward of the primary container;
• and
• a secondary bottom disposed below the primary bottom of the primary container, where the secondary bottom is coupled to the secondary container through an expansion joint, and where the expansion joint is configured to permit an expansion and a retraction of the secondary bottom independent from the secondary container;
• a second insulation layer disposed below the secondary bottom, wherein the second insulation layer is disposed below a concrete footing of the secondary bottom in a reservoir.

A method of assembling a cryogenic storage system, the method comprising:

• disposing a primary container having a primary bottom on a first insulation layer;
• disposing a secondary container around the primary container, and
• coupling a secondary bottom to the secondary container through an expansion joint, the secondary bottom disposed below the primary bottom, where the expansion joint is configured to permit an expansion and a retraction of the secondary bottom independent from the secondary container,
• wherein the secondary bottom includes a sand layer below the primary container and a slide bearing below the secondary container, and the sand layer, the slide bearing, and the expansion joint permit the secondary bottom to move independent from the secondary container.