Liquefied gas storage facility having a polygonal load-bearing structure

A liquefied gas storage facility (1) including:

• a load-bearing structure (10) including an internal space delimited by a bottom load-bearing wall (11) and a vertical load-bearing wall (12), a contour of said bottom load-bearing wall (11) being the shape of a regular polygon with N sides having dimensional tolerances, N being an integer greater than or equal to 3,
• said vertical load-bearing wall (12) being made up of N vertical load-bearing panels (14) and forming a surface having said polygon as directrix, in which each of the N sides of the polygon corresponds to an intersection of the bottom load-bearing wall (11) with one of said vertical load-bearing panels (14),
• and a sealed and thermally-insulating tank (20) stored in the internal space of the load-bearing structure (10), the tank (20) including a tank bottom wall (21) disposed on the bottom load-bearing wall (11) and a tank vertical wall (22) disposed on the vertical load-bearing wall (12),
• said tank bottom wall (21) including a plurality of angular sectors (25) that are images of one another by rotation by a predetermined angle about a vertical axis, the predetermined angle being equal to k·360°/N where k is a positive integer,
• said tank vertical wall (22) comprising a vertical row (110) of corner insulating wall modules (210, 210A, 141) disposed along each edge (13) of the vertical load-bearing wall (12) separating two adjacent vertical load-bearing panels (14) and a vertical row (120) of planar insulating wall modules (131;
• 131A) disposed on each vertical load-bearing panel (14),
• in which an azimuth angle offset relative to said vertical axis between two vertical rows (120) of planar insulating wall modules (131, 131A, 171) disposed on two adjacent vertical load-bearing panels (14) is equal to 360°/N, with an accuracy better than 5 mm in an ortho-radial direction on said adjacent vertical load-bearing panels (14),
• said tank vertical wall (22) comprising adjustment insulating elements (144, 317, 337) for adjusting offsets (900) between the vertical rows (110) of corner insulating wall modules and the vertical rows (120) of planar insulating wall modules,
• in which each vertical row (120) of planar insulating wall modules includes a metal sealed membrane (170) including vertical corrugations (172),
• and in which each angular sector (25) is oriented relative to k vertical load-bearing panels (14) associated with said angular sector (25) so that a sealed metal membrane (70) of the angular sector (25) includes radiating corrugations (72) oriented perpendicularly to each associated vertical load-bearing panel (14), said radiating corrugations (72) being connected continuously to the vertical corrugations (172) of the metal sealed membrane (170) of the vertical row (120) of planar insulating wall modules disposed on the associated vertical load-bearing panel (14).