Corrugated corner piece for the construction of a waterproofing membrane for a tank and folding system for the formation of a corrugation in a corner piece

摘要

The invention relates to a corner piece (2) for the construction of a waterproofing membrane (3) for a tank, said corner piece (2) comprising a first side (11) and a second side ( 12) which are inclined with respect to each other by an angle α of between 1 ° and 179 ° and which meet at a fold line (13), the corner piece (2) comprising a corrugation (17) intersecting the fold line (13) and extending from one end of the corner piece (2) to the other, the corrugation (17) comprising: - a first portion ( 18) provided in the first panel (11); - a second portion (19); - a central portion (20) formed astride the first panel (11) and the second panel (12); - the central portion (20) having, in section in a plane passing through the fold line (13), a profile having an inverted W shape having a concave recess (24) and two convex projections (22, 23) arranged transversely on either side of said concave recess (24). Figure to be published: 11