Method and system for punctual fastening a waterproofing membrane to hydraulic works

Abstract

A method and a system for punctual fastening a waterproofing and protective membrane (13) of plastic material, for protective and waterproofing surfaces (19) of hydraulic works (10), such as canals, tunnels, dams and the like. In relation to surface areas subjected to fluid and / or wind actions, the protective membrane (13) is fastened to the concrete structure (11) of the hydraulic work and / or to ground (37) by a system of punctual fastening devices (15, 16). Each fastening device (15, 16) comprises an anchoring member (23, 32, 36) to penetrate into the concrete structure (11) and / or into ground (12) along a wished depth, provided with a tie rod or fastening end portion (23', 35, 40) partially protruding from the surface (10) to be covered, to which the protective membrane (13) is sealingly fastened and pressed against the surface area of the hydraulic structure and / or ground by rocking means (25, 26, 27, 28, 29): the locking means are conformed to provide a wide annular contact surface area with the membrane (13), suitable to transmit forces and / or strains to the punctual fastening devices (15).