116 total height. The geocell type considerations were a function of slope steepness, geotechnical parametric of the cover material and final total thickness of the closure cover. Biaxial tensor: This tensor made of high-strength PET (polyester) was used to support the geocell filled with cover material on the slope. It was anchored in trenches built on each slope sidewalk, in which the entire set of geosynthetics was anchored, i.e., the geomembrane, geotextile and tensor. PET is a material that shows low deformation over time when subjected to a constant load, making it an ideal material for a structure whose closure life is projected to be hundreds of years. 1.5 Coverage Installation Procedure. Once the slopes of the reservoir were shaped and profiled to achieve physical stability, the geotextile and geomembrane were installed. Immediately proceeded the biaxial tensor anchored in a trench was progressively placed on the sidewalk in the planned areas. The geocell was then installed on the slope. They provided backfill stability and facilitated gravel placement for large areas and long slope sections. Figure 3 – Geocell and geogrid installation. Next, the granular material was placed for drainage purposes of the flow through the topsoil (see Figure 4), which discharged into perforated pipes placed transversally to the slope, and these into concrete collector boxes. Finally, topsoil was placed on top of the gravel for vegetation purposes with native species.
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