The invention relates to a sealed and thermally insulating vessel comprising a vessel wall, the vessel wall comprising a secondary insulating barrier (1), a secondary waterproof membrane (2), a primary insulating barrier (3) and a primary waterproof membrane ( 4) the tank further comprising a plurality of primary anchoring members (12) cooperating with at least one primary insulating panel (11) of the primary insulating barrier (3), in which a said primary anchoring member (12) ) comprises: - a base (30), - a rod (31) passing through an orifice of the secondary waterproof membrane (2), - a support element (16, 54) mounted on the rod (31) and resting on a primary insulating panel (11), - a sealing washer (34) engaged on the rod (31) and comprising a flange (37) sealed to the secondary waterproof membrane (2), - a deformable seal (42 ) sealingly connecting said sealing washer (34) and the rod (31) so as to allow a rel atif between the sealing washer (34) and the rod (31). Figure to be published: 3
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