Lay between the foundation and the foundation to drain the accumulated water between the foundation and the foundation, block capillary water and effectively integrate into the edge drainage system. This structure automatically shortens the drainage path of the foundation, the drainage time is greatly shortened, and the number of selected foundation materials can be reduced (that is, materials with more fine materials and lower permeability can be used). Can extend the life of the road.
Laying a three-dimensional composite drainage network on the base layer can prevent the fine materials of the base from entering the base layer (that is, play an isolation role). The aggregate base will enter the upper part of the geonet to a limited extent. In this way, the composite geo-drainage network also has a potential to restrict the lateral movement of the aggregate base. In this way, its role is similar to the reinforcement of the geogrid. Generally speaking, the tensile strength and rigidity of the composite geo-drainage network are better than many geogrids used for foundation reinforcement. This restriction will increase the support capacity of the foundation.
After the road is aged and cracks are formed, most of the rainwater will enter the section. In this case, the three-dimensional composite drainage network is laid directly under the road surface instead of the drainage foundation. The three-dimensional composite drainage network can collect water before it enters the foundation / subbase. Moreover, a film can be coated on the bottom end of the three-dimensional composite drainage net to further prevent moisture from entering the foundation. For rigid road systems, this structure allows the design of roads with a higher drainage coefficient Cd. Another advantage of this structure is that it may allow the concrete to hydrate more evenly (research on the extent of this advantage is ongoing). Whether it is a rigid road or a flexible road system, this structure can extend the life of the road