Ground liquefied natural gas storage tank and method for manufacturing the same

A ground liquefied natural gas storage tank comprising;

• an independent tank in which a space for storing a storage material is formed to constitute an inner tank;
• a roof;
• at least one sandwich plate to comprise a pair of metal plates facing each other, the metal plates having a reinforcing material formed therebetween, and a filler filled between the metal plates, wherein the at least one sandwich plate surrounds the outer surface of the independent tank to constitute an outer tank;
• at least one external reinforcing member formed on an outer surface of a wall body of the at least one sandwich plate, wherein the at least one external reinforcing member comprises a first longitudinal reinforcing member and a second lateral reinforcing member configured at a right angle to the first longitudinal reinforcing member;
• and
• at least one external reinforcing member formed on an outer surface of the roof, wherein the at least one external reinforcing member comprises a third reinforcing member and a fourth and fifth reinforcing member configured at a right angle to the third longitudinal reinforcing member and connected to the first longitudinal reinforcing member and the second lateral reinforcing member,
• wherein the independent tank is located over a ground heat insulation structure, and
• the at least one sandwich plate is transported and installed to surround the outer surface of the independent tank that has been completely manufactured.