Dimensional composite drainage networks; 3D vegetation net, Geonet, specifications, most complete, highest credibility manufacturers the Thai An Zhirong Thailand An Zhirong Sales Sun Qisheng: 13,012,748,448 13,853,886,007 composition of the three-dimensional composite drainage network structure is a three-dimensional geonet core, both sides stuck Acupuncture perforated nonwoven geotextile. 3D geonet core comprises a thick vertical ribs, as well as the top and the bottom of each one of the oblique ribs. The road can be quickly discharged groundwater, maintain the system itself as well as a pore blocking capillary water at high loading. Meanwhile, it can also play the role of isolation and foundation reinforcement. The three-dimensional composite drainage network by a unique three-dimensional geonet double-sided adhesive geotextile fabric. The combination of the geotextile (filtration function) and geonet (drainage and protection), provides complete filtration - drainage - Protect efficacy. Unique three-dimensional structure of the three-dimensional composite drainage network network core, able to withstand higher compression loads, and to maintain a considerable thickness, good hydraulic conductivity in the entire process of using. The three-dimensional composite drainage network characteristics: 1, laying in between the foundation and the bottom of the base for water discharge between the foundation and the bottom of the base, blocking capillary water effectively bound to the edge of the drainage system. This structure is automatically shorten the foundation drainage channels, drainage greatly reduce the short time, but also can reduce the number of the selection of foundation material (can be used with more fine material of low permeability material). Can extend the life of the road. Three-dimensional composite drainage network in the laying of sub-base to prevent fines into the land of the substrate the grassroots (also is to play a role in isolation). Aggregate base will enter the geonet the upper part to a limited extent. In this way, the restricted aggregate base the geocomposite drainage network, there is a potential lateral movement of role, in this way, its role is similar to the role of geogrid reinforcement. In general, the tensile strength and rigidity of the geocomposite drainage network is better than many for foundation reinforcement geogrid, this limiting effect will increase the support of the foundation. 3, road aging, crack formation, most of the rain will enter the sections. In this case, the three-dimensional composite drainage network directly laying drainage foundation under the road instead. Dimensional composite drainage networks in the water to enter the foundation / sub-base before its first collection. But also at the bottom of the three-dimensional composite drainage network packet layer film, and further prevent moisture from entering the foundation. On the the rigid road system, this structure allows higher drainage coefficient used to Cd to design the road. Another advantage of this structure is possible to make the concrete more evenly hydrated this structure are able to extend the life of the road. 4, in the northern climate conditions, the laying of a three-dimensional composite drainage network to help mitigate the effects of frost heave.