method and device of cover coat for joints in hydraulic works

摘要

A method and a device for covering and waterproofing joints between concrete members of hydraulic works, such as dams, canals, hydraulic galleries and reservoirs. A flexible cover strip including a flexible waterproofing membrane in elastomeric material having a first elastic modulus, and at least one flexible support layer in synthetic material having a second elastic modulus greater than the first elastic modulus for limiting deformation of the impermeable membrane, is straddled between the opposite concrete members, for example at vertical joints and/or at longitudinal joints of the hydraulic work. The support layer and the waterproofing membrane are transversely folded in a loop and laid down inside and/or outside the joint sealingly fastening the cover strip to the concrete members along the edges thereof. Movements between concrete members of the joint are compensated by a free extension of the folded cover strip.