Patent ID: 8627636

Claim:
A method of constructing a liquefied gas storage tank on land, comprising: stacking a plurality of unit-wall structures made of concrete and each having a front set and a rear set of iron rods arranged lengthwise and breadthwise therein, in a cylindrical arrangement, each of the unit-wall structures having respective grooves on upper and lower surfaces thereof, the stacking the plurality of unit-wall structures including interposing a positioning block between adjacent unit-wall structures within a corresponding set of the grooves on the adjacent unit-wall structures to ensure that the unit-wall structures are located in a desired position with respect to each other when the unit-wall structures are stacked, the positioning block located between protruded ends of the lengthwise iron rods of the front set and the rear set of iron rods of the adjacent unit-wall structures with a front side of the positioning block spaced inwardly from the protruded ends of the lengthwise iron rods of the front set of iron rods and a rear side of the positioning block spaced inwardly from the protruded ends of the lengthwise iron rods of the rear set of iron rods; and connecting the unit-wall structures that are adjacent to each other in longitudinal and lateral directions with respect to each other to form a wall of the storage tank.