Geomembranes are widely used in various anti-seepage projects such as waste landfills. Proper installation can maintain anti-seepage effects for decades. This requires adding a protective layer to the geomembrane before and after installation to prevent it from being scratched by sharp objects such as stones. So, how can the protective layer of the geomembrane be done? The following HDPE geomembrane manufacturer will provide a detailed introduction:

The protective layer of geomembrane is not only to cover up the soil material backfilled on it, but also to be laid from the bottom layer. They protect the geomembrane at the same time as the protective layer on top of the geomembrane, making it have a longer service life. The entire geomembrane laying layer is divided into five layers from bottom to top:

1. Support layer: Geomembrane is a flexible material that must be laid on a reliable support layer to ensure even stress distribution.

2. Undercushion layer: It is laid under the geomembrane and has two functions: one is to remove accumulated water and gas under the membrane to ensure the stability of the geomembrane, and the other is to protect the geomembrane from being damaged by the supporting layer.

3. Geomembrane: It is the main body of anti-seepage, which should not only have reliable anti-seepage properties, but also be able to withstand certain construction stresses and stresses caused by structural settlement during use. Therefore, there are also strength requirements. The strength of geomembrane is directly related to its thickness and can be confirmed through theoretical calculations or engineering experience.

4. Upper cushion layer: It is a transitional layer between the protective layer and the geomembrane. Because the protective layer is mostly made of large rough materials and is easy to move, if it is directly placed on the geomembrane, it is easy to damage the geomembrane. Therefore, the upper cushion layer must be well done, usually with gravel material, and the thickness should not be less than 375px.

5. Protective layer: It is the outer layer that comes into contact with the outside world, designed to protect against the impact of water or waves, weathering erosion, freezing damage, and to cover up sunlight and ultraviolet rays. Its thickness is generally between 15-625px.