Calculation method for calculating dimensions of spacer elements for the construction of a liquid-product storage facility

A calculation method (400) for calculating dimensions of spacer elements (40) intended for the construction of a liquid-product storage facility (1), the storage facility (1) comprising a load-bearing structure (10) having an internal space (11) delimited by a load-bearing wall (12) and a sealed tank (20) installed in the internal space (11) of the load-bearing wall (12), the calculation method (400) being implemented by computer and comprising:

• obtaining (401) position measurements of the load-bearing wall (12) in three dimensions;
• on the basis of said position measurements, defining (402), in the internal space (11) of the load-bearing structure (12), an initial position of the tank (20), the initial position of the tank comprising an initial position (220) for the peripheral wall (22) of the tank (20), the peripheral wall (22) having, in the initial position (220), a plurality of planar facets (224) forming a polygonal cylindrical surface having as directrix a convex polygon and a generatrix perpendicular to the directrix;
• and
• for each planar facet (224):
• defining (403) positioning lines (100) defining locations (130) of juxtaposed wall modules (30, 660) intended to form the peripheral wall (22) of the tank (20);
• on the basis of the positions of the positioning lines (100), defining (404) setting lines (150) extending perpendicularly with respect to the planar facet (224) between the planar facet (224) and the load-bearing wall (12), the setting lines (150) being disposed such that at least one setting line (150) intersects each of the locations (130) of the wall modules (30, 660), said setting lines (150) representing the positions of spacer elements (40) intended to be disposed between each wall module (30, 660) and the load-bearing wall (12) in a final position of the peripheral wall (22) of the tank (20);
• calculating (405) initial dimensions of the setting lines (150) on the basis of the position measurements of the load-bearing wall (12);
• and
• iteratively decreasing (405) the dimensions of the setting lines (150) so as to bring the wall modules (30, 660) closer to the load-bearing wall (12) up to the final position of the peripheral wall (22) of the tank (20), the iterative decrease being carried out under the constraint of acceptability criteria, the acceptability criteria comprising planarity criteria limiting deformations of the planar facets (224).