Under heavy rain conditions, the plastic dam lining material and slope protection structure can play a protective role. In places without geomembrane coverage, it can prevent particles from scattering and flying, thereby forming some potholes; in places covered with geomembrane, raindrops hit the geomembrane and disperse. The pressure is reduced and the impact on the slope protection is reduced. At the same time, since the geomembrane is impermeable, raindrops flow along the geomembrane to its edge, causing some grooves to form on the edge of the geomembrane. After erosion, soil infiltration capacity gradually decreases, and then slope runoff is formed. Runoff is formed between the geotextiles and dispersed by the geomembrane, allowing rainwater to flow down in a laminar flow. Plastic dam lining material can follow the construction steps.
1. Material inspection. Before the geomembrane laying construction, the membrane material must be inspected to check whether the material performance index is consistent with the actual needs of the project, and at the same time, the on-site quality inspection should be carried out, and the inspection can only be used for on-site construction.
2. Base surface cleaning. Before the geomembrane is laid, it is necessary to remove the hard protrusions of stones in the sandy soil layer at the bottom of the water system, and there are no other adhering sundries on the ground.
3. Geomembrane laying. First, measure the size, and number the building materials one by one according to the actual size of the building materials used. Then, while laying the geomembrane, carry out the tamping work. Each piece of membrane material is spliced by overlapping, welding or bonding methods until the laying is completed. .
4. Laying quality inspection. After the splicing and laying of the geomembrane is completed, the quality of the laying shall be checked. First, check whether it is caused by pulling and damage during the compaction work, or whether the exposed geomembrane has not been pressed to stabilize the folds, and then whether there are loose splicing, jump welding, interlayer, etc.