▎ 摘　　要

NOVELTY - Composite directional drainage composite membrane, comprises geotextile, geomembrane, water-conducting rib and geotextile composite. The material of the water-conducting rib is made of polypropylene, polyethylene, polyethylene terephthalate, polyamide fiber or plastic material, the special-shaped fiber after spinning and stretching, or the special-shaped rib or woven round rope formed by melt extrusion. USE - Used as composite directional drainage composite membrane. ADVANTAGE - The composite directional drainage composite film increases the geosynthetics material with directional water discharge function the construction process, ensures that after the engineering is finished, rainwater can be drained to drainage channels at two sides of the roadbed by directional drainage product, reduces the erosion damage of the rain to the road bed, prolongs service life of road or railway, reduces maintenance cost, and protects personal property safety.