Patent ID: 8857650

Claim:
A cryogenic liquid storage tank comprising: a planar base plate and a side wall extending upwardly around the base plate, said base plate and side wall comprising: an inner leaf, the inner leaf comprising: an inner leaf outer concrete layer, said inner leaf outer concrete layer being hoop stress reinforced; an inner leaf inner concrete layer; and an inner leaf concrete bottom layer; and an outer leaf generally enveloping the inner leaf, said outer leaf comprising: an outer leaf concrete layer, said outer leaf concrete layer being hoop stress reinforced; and a lower, outer leaf concrete bottom plate, wherein: both the inner leaf and the outer leaf generally form structurally continuous transitions from said base plate to said side wall, said outer leaf concrete bottom plate is formed structurally continuous with the outer leaf concrete layer an inward surface of said outer leaf concrete bottom plate and said outer leaf concrete layer is lined with a metallically continuous outer leaf metallic membrane, a bottom insulation layer is arranged above said outer leaf metallic membrane on said lower, outer leaf concrete bottom plate, said bottom insulation layer being formed generally continuous with a wall insulation filled in an annular cavity between an inner face of said outer leaf and an outer face of said inner leaf, said inner leaf concrete bottom layer is formed on said bottom insulation layer, said inner leaf concrete bottom layer is formed structurally continuous with the inner leaf outer concrete layer, and the inner leaf concrete bottom layer and the inner leaf outer concrete layer are lined with a metallically continuous inner leaf metal membrane, said inner leaf metal membrane is sandwiched between the inner leaf outer concrete layer and the inner leaf inner concrete layer, and said outer leaf is configured to support an insulated dome structure.