Summary of "Geomembranes: Key Materials for Building Engineering Protection Barriers"
Geomembranes are anti - seepage and barrier materials made from polymer materials such as polyethylene (PE) and polyvinyl chloride (PVC). With their extremely low permeability, chemical corrosion resistance, high tensile strength, puncture resistance, and excellent anti - aging properties, geomembranes serve as "protective armor" in engineering construction and are widely used in various fields, including water conservancy, environmental protection, and transportation.
In water conservancy projects, geomembranes are core materials for anti - seepage in reservoirs and channels. After applying high - density polyethylene (HDPE) geomembranes in a large - scale reservoir, the seepage volume was reduced by more than 80%. They also enhance water resource utilization and reduce maintenance costs. In environmental protection projects, landfill sites often adopt a composite structure of multiple layers of geomembranes and geotextiles. In one landfill project, after using composite geomembranes, pollutant levels around the site remained within the standard. Geomembranes also play a crucial role in anti - seepage and isolation in sewage treatment plants, tailings ponds, and other projects. In transportation projects, geomembranes can be used for anti - seepage and reinforcement of road and railway subgrades, keeping the subgrades dry and improving their stability. They can also function as waterproof layers in tunnels.
Currently, new types of geomembranes, such as nano - composite geomembranes and photocatalytic self - cleaning geomembranes, have emerged. In terms of construction, automated welding equipment has improved the quality and efficiency of geomembrane installation. In the future, geomembranes have broad application prospects in emerging fields, such as new energy projects and ecological restoration projects. They will develop towards high - performance, multi - functional, and environmentally friendly directions, providing reliable support for engineering construction and ecological protection.
