Drainage Lining Optimization and Its Influence on the Physical Stability of Waste Dump in Perú

The design of the deposit of surplus material (DME) deals with the optimization of surface drainage, using geosynthetics that guarantee its stability in a determined period of time. With the SENAMHI data, it was possible to determine the hydrological flow of 0.081 m3s, thereby obtaining different design flows that vary according to the design slope. The design was made with two materials (1.0-mm smooth geomembrane and 6.0-mm concrete canvas), with which the discharge channel and the perimeter have been covered, capturing the surface flow and directing it toward a discharge point. In order to determine the wear and life of these materials, calculations were made applying the data obtained (flow rates, velocities, channel area, etc.) with the Archard model to determine the wear that both materials will suffer through of a period of time. The calculations revealed that both materials have lost their physical properties over time, with a slope of 7%, and in a period of 5 years the one that suffers the greatest wear is the concrete canvas with 34.32 mm against the smooth geomembrane with 31.23 mm. The article allows us to know the type of material that behaves better to the design; in view of this it was possible to determine that the wear of the smooth geomembrane of 1.0 mm with slopes and variable speeds is less compared to the wear of the concrete canvas of 6.0 mm.