The composite geomembrane has corresponding deformation variables, and the stress caused by the concave and convex defects of the underlayer can be quickly transmitted and dispersed, and the strain capacity is strong. The pore pressure and supporting force on the contact surface between the composite geomembrane and the soil are very easy to subside. The composite geomembrane has the corresponding actual thermal insulation effect, reducing the damage of the soil frost heave to the geomembrane and high-density polyethylene geomembrane, thereby reducing soil deformation. The composite geomembrane is selected to be embedded, which has excellent anti-aging characteristics and reduces engineering maintenance.
The composite geotextile is convenient for laying and construction, reduces the freight volume, reduces the engineering cost, and reduces the construction period. The composite geomembrane uses geotextile instead of granular material as the geomembrane protective layer to protect the geomembrane impermeable layer from damage, reduce the gradation requirements of the cushion particle size, and can play the role of drainage and so on. The friction coefficient of the composite geomembrane is large, which can prevent the cover layer from sliding. Compared with the high-density polyethylene geomembrane, the composite geomembrane has more protective layers, and the non-woven fabric in the composite geomembrane has a greater friction coefficient. The composite geomembrane can increase the slope rate and reduce the total area. The composite geotextile has high mechanical strength, such as tensile strength, tear strength, burst strength and puncture strength.
Low-density polyethylene geomembrane has high flexibility and is softer than high-density polyethylene membrane. It has various specifications and laying methods to meet different engineering geotechnical regulations. Hot-melt welding is selected, with high welding strength and convenient construction. The low-density polyethylene geomembrane is made of non-toxic and environmentally friendly materials. The basic principle of geotechnical engineering is a general physical change and will not form other harmful substances. Low density polyethylene geomembrane is the best choice for environmental protection, breeding and drinking water tanks. The low-density polyethylene geomembrane uses new technology to improve the actual effect of geotextile, but the production process is more scientific and faster, and the cost is less than traditional waterproof materials. In fact, the calculation shows that the project of selecting low-density polyethylene geomembrane will save about 50% of the cost.