In modern times, environmental pollution has become a major global concern. The construction of landfills is aimed at processing solid waste from various daily life and production sources, including hazardous and harmless materials. The risk of groundwater contamination by leachate generated from waste is high. Therefore, installing geomembranes is necessary to prevent pollution.
Geomembrane is a high-density synthetic lining. It is installed as a barrier to prevent water or other liquids from entering the soil. Compared to natural or clay liners, they are more effective and cost-effective in preventing pollutants from migrating to soil and groundwater.
Installing geomembranes in landfills is a complex process that requires appropriate planning and execution. The following steps should be taken:
1. Site preparation: The site must be cleared of debris, rocks, and vegetation to provide a smooth surface for the installation of geomembranes.
2. Selection of geomembrane: The appropriate type of geomembrane should be selected based on factors such as waste type, climate, and soil conditions.
3. Installation of geomembrane: The geomembrane should be placed on a prepared surface and secured with anchors, tensioning devices, and heavy objects.
4. Jointing: Proper jointing of geomembranes is crucial to ensure that the system is leak free. Perform joint testing after installation to confirm its integrity.
5. Protective layer: The geomembrane must be covered with an additional protective layer, such as geotextile, to prevent the lining from being pierced by sharp objects or fragments.
6. Monitoring: A system for monitoring the surface of geomembranes should be established to detect any leaks or defects.
