Sealing device for expansion joints of concrete dams and method for installing same

摘要

A sealing device for sealing an expansion joint cut in a concrete dam comprises a tubular cell made of an elastic material and provided at its upper and lower ends respectively with a rigid upper ferrule and a rigid and rounded lower ferrule. Cables are mounted between the upper and lower ferrules for preventing the longitudinal stretching of the cell. The cell includes two longitudinal reinforcements spaced one from another and disposed opposite the cut for preventing the radial deformation of the cell in the cut. A continuous peripheral space is defined on the cell between the lower ends of the reinforcements and the upper end of the lower ferrule to allow the cell to form a continuous peripheral seal against the walls of a hole bored along the expansion joint. A method for the installation of the expansion joint in the concrete dam using the sealing device is also proposed, wherein the sealing device is installed in a hole bored on the expansion joint, the reinforcements being positioned in the direction of the water flow. The cell is then filled and pressurized with appropriate fluids. The expansion joint is obtained by the completion of the cut.