Composite geomembrane anti-seepage construction specifications and quality acceptance methods

The composite geomembrane anti-seepage body structure consists of four layers: base surface, composite geomembrane, protective layer, and stone (or concrete) slope protection. The design of each layer is described below.
Membrane base surface design
In order to prevent the soil layer on the composite geomembrane from sliding along its surface and increase the stability of the protective layer (including the protective surface), the surface of the upstream membrane-paved dam shell is excavated into stages. The height difference of each level is based on the horizontal width. Depends on the slope ratio, the slope design is such that after excavation and shaping, the bricks, stones and roots of trees on the surface should be cleared away, and the surface should be tightened and smoothed with a clapper.
Design of composite geomembrane
Main features, combined with the specific conditions of the site, the design and selection of composite geomembrane.
Sheath design
The anti-seepage effect of composite geomembranes depends on the integrity of the plastic film during construction and operation. In order to prevent trampling by humans and animals, damage to animals and plants and reduce the effect of light and heat, since they are highly Molecular chemical fiber polymer, so direct sunlight should be avoided, so a protective layer should be laid on the composite geomembrane.
The particle diameter of the protective layer should not be too large, otherwise it will puncture the composite geomembrane. Generally, the particle diameter of the protective layer should be approximately estimated according to the following formula.