Three-dimensional drainage network (also known as three-dimensional geotechnical drainage plate, tunnel drainage plate, drainage plate) is composed of three-dimensional plastic network double-sided bonding seepage geotextiles, which can replace the traditional sand and gravel layer, mainly used for landfill, roadbed and drainage of tunnel inner wall. Three-dimensional composite drainage network is a new geosynthetic material. The structure is a three - dimensional geotextile core. The 3d geotextile consists of a thick vertical rib and a diagonal rib at the top and bottom. Groundwater that can quickly drain off roads has its own&nb…