YR products play a vital role in landfills. The following are their specific applications:

Anti-seepage effect

– Bottom anti-seepage:

Geomembrane is the key material for anti-seepage at the bottom of landfills. It is usually made of high-density polyethylene (HDPE). This geomembrane has extremely low permeability and can effectively prevent leachate from seeping into groundwater bodies and prevent groundwater pollution. For example, a large urban landfill is laid with a suitable thickness of HDPE geomembrane at the bottom. During the operation of the landfill, the leachate can be controlled within the landfill and the surrounding soil and groundwater environment can be protected.

– Slope anti-seepage:

 Geomembrane is also needed to be laid on the slope of the landfill for anti-seepage treatment. Due to the relatively poor stability of the slope, the laying of geomembrane has higher requirements. Generally, special anchoring and fixing methods are used to ensure that the geomembrane fits firmly on the slope to prevent tearing or leakage, and ensure the anti-seepage effect of the entire landfill.

Drainage function

– Leachate collection and discharge:

 Geocomposite drainage nets, drainage boards and other geotechnical materials can be used in the leachate collection and discharge system of landfills. They can quickly guide the leachate generated by garbage to the collection pool, which is convenient for subsequent treatment and disposal. For example, laying a geocomposite drainage net at the bottom of the landfill, its three-dimensional structure can provide a large drainage space, so that the leachate can be discharged quickly, avoiding the accumulation of leachate at the bottom of the landfill, thereby reducing the pressure of leachate on the anti-seepage geomembrane and extending the service life of the geomembrane.

Gas collection and discharge

– Landfill gas diversion:

Geotextiles and geocomposites can be used in the gas collection system of landfills. A large amount of landfill gas is generated during the landfill process, and the main components include methane, carbon dioxide, etc. These geotechnical materials can help divert the landfill gas so that it can be discharged into the atmosphere in an orderly manner or collected and utilized. For example, setting up a gas collection pipeline wrapped with geotextiles inside the landfill can enable the landfill gas to flow smoothly to the collection station, which not only prevents the safety hazards caused by gas accumulation, but also realizes the resource utilization of landfill gas.

Covering and isolation effect

– Temporary covering:

 In the daily operation of landfills, geotextiles are often used as temporary covering materials. When the garbage is landfilled to a certain height, the use of geotextiles for covering can reduce the entry of rainwater into the landfill area and reduce the amount of leachate produced. At the same time, geotextiles can also prevent garbage from being blown away by the wind and reduce pollution to the surrounding environment.

– Final covering:

After the landfill reaches its designed capacity, final covering is required. At this time, geotextiles, soil, vegetation, etc. together constitute a covering system. Geomembranes are used to prevent gas and leachate leakage inside the landfill, while geotextiles and geogrids help to enhance the stability of the covering layer, promote vegetation growth, and better integrate the landfill with the surrounding environment.