Composite geomembrane is widely used in irrigation projects and is a new type of anti-permeability material used to treat roadbed diseases. Due to its excellent anti-permeability, excellent frost resistance, convenient structure and low engineering cost, it is expected to be widely used in road disease management in the future.
By reducing the leakage of the dam, the anti-seepage effect of the geomembrane greatly prolongs the service life of the dam, and an excellent anti-seepage effect can be obtained.
Before laying the composite geomembrane, the slope of the channel must be processed and cut according to the size of the design section, and the slope density must reach 98% or higher of the design requirements. If the compactness of the local area does not meet the design requirements, it must be rolled on a cross rolling mill until the design requirements are met. At the same time, the surface is smooth, free of weeds and debris. The polyethylene insulating material can be placed in the area under the local composite geomembrane, flattened and reinforced, and then placed directly.
The cut composite geomembrane is rolled into a roll, the length is marked, and then transported to the construction site according to the location of the project. For manual laying, place slowly from the top to the bottom of the canal. Two adjacent blocks overlap by 12-14 cm, and the upstream width is opposite to the downstream width in the direction of current flow. After laying, the composite geomembrane contacts the slope and then becomes concrete. A sandbag or a sandbag can hold the composite geomembrane to prevent the spread of the composite geomembrane from being blown by the wind.