Prefabricated structure for forming fluid-tight and thermo-insulated walls for very low temperature fluid confinement container

In a prefabricated structure for forming fluid-tight and thermally insulating walls of a container for a very low temperature fluid, comprising,

• a substantially flexible fluid-tight internal primary barrier having an inner face in contact with said fluid and an outer face;
• an internal distribution panel layer secured to said outer face of said primary barrier;
• a rigid external partition having an outer face and an inner face;
• an external distribution panel layer secured to said inner face of said external partition;
• two intermediate thermal insulation panel layers, said layers held in sandwich-like fashion between said internal and external distribution panel layers and comprising an external and an internal layer, each of said thermal insulation layers being constituted by jutaposed insulating plates made from a fluid-tight material;
• wherein each of said insulating plates of each thermal insulating panel layer forms a joint with an adjacent insulating plate of that thermal insulating panel layer, said plates being located in a way that the joints in one layer are situated in front of a plate of the other layer;
• and
• a cover strip situated between and adhering to said two insulation layers in a way to cover each said joint, and a connector made from a fluid-tight insulating material being provided for obturating each said joint;
• said external insulation layer containing a plurality of holes at a predetermined distance from said joints in said external insulation layer and said external distribution panel being fastened to said external partition by fastening members located at an outer end of said holes formed in said external insulation layer;
• and
• fluid-tight connectors made from insulating material provided for filling up and hermetically adhering to a respective one of said holes whereby said external insulating layer is continuous and fluid-tight over its entire surface.