Liquefied gas storage tank and ship comprising same

A liquefied gas storage tank comprising:

• a corner block disposed at a corner portion forming one part of a storage space for accommodating liquefied gas,
• wherein the corner block comprises a lower block provided inside the first and second surfaces and formed of a single board, a plurality of upper blocks disposed adjacently on the lower block and bonded to each other, and an upper connection block that is bonded to upper surfaces of the lower blocks disposed adjacent to each other and connects the lower blocks, and
• wherein the upper connection block comprises
• a barrier fixing member provided to be bent at a predetermined angle, securing a corner primary barrier made of metal, and disposed on the outside of the corner primary barrier,
• an inner primary plywood disposed on the outside of the barrier fixing member,
• a corner primary insulation material disposed on the outside of the inner primary plywood, and
• an outer primary plywood disposed on the outside of the corner primary insulation material and bonded to the lower block,
• wherein
• the outer primary plywood having a plurality of first holes is bonded to an outer surface of the corner primary insulation material having a plurality of second holes,
• the inner primary plywood having a plurality of third holes is bonded to an inner surface of the corner primary insulation material,
• the outer primary plywood, the corner primary insulation material, and the inner primary plywood are bonded,
• the barrier fixing member is secured to an upper surface of the inner primary plywood,
• the barrier fixing member is secured to the inner primary plywood, and
• a foam plug is inserted into each of communication holes formed by the plurality of first and second holes.