Final stratified column of terrace Final stratified column of slope Drainage stratum Polystyrene and geotextile sheets detail
|
Each of the terraces is made up of a series of layers of materials with different properties and features to those used to seal the depot. Its waterproofing depends on the function it performs in the structure. Specifically and by order of construction, we have the following: - Settling layer of 20 cm of compacted earth. In the case of areas 1 and 2, this thickness of earth has been greatly increased through creation of compacted earth terraces.
- 20 cm of granite gravel for gas settlement and drainage.
- Geo-textile sheet.
- High-density polyethylene PEAD sheet.
- 20 cm of calcareous gravel that allow excess water to circulate towards the perimeter ditches.
- Geo-textile sheet.
- Selected, non-compacted earth suitable for sowing.
Overall, almost 1million m3 of earth, 80,000 m3 of gravel, 78,000 m2 of PEAD sheeting and 155,000 m2 of geo-textile sheeting, as well as other auxiliary material, such as organic substratum (compost), fertilisers (manure), etc. were used.
|