Composite geomembrane is a combination of geomembrane and geotextile fabric made according to certain requirements. The geomembrane can be divided into one fabric and one membrane and two fabrics and one membrane according to the structure. The geotextile fabric in the composite geomembrane plays a protective role for the membrane, which can improve the tensile strength and puncture strength of the geomembrane and increase the friction coefficient between the geomembrane and other geotechnical materials. Therefore, the geomembranes used in engineering are mostly composite geomembranes.
Composite geomembranes are widely used in channel seepage control projects. Geosynthetic materials in civil engineering, especially in flood control and rescue projects in a large number of applications and their effectiveness, have attracted the attention of the majority of engineers and technicians. For the application technology of geotextile materials, ** from seepage control, back filtration, drainage, reinforcement, protection, and other aspects, put forward the normative technical requirements, greatly accelerated the pace of promotion and application of new materials. The material is widely used in the irrigation channel impermeability project, combined with construction practice, the application of composite geomembrane technology.