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The construction of highways has greatly facilitated people's travel and production and life. In long-term use, some pavements will experience settlement and cracks, and these problems are not simply caused by vehicle rolling. The freeze-thaw phenomenon of subgrades with high water content can also lead to these problems. Therefore, we need to solve the problem from the root.
For road construction, some are constructed directly on the soil layer. Even if geogrids are used to reinforce the soil layer, we also need to consider the drainage problem, because there may be soil layers with high water content in the soil layer. This requires us to block it, which is equivalent to performing a waterproof construction on the entire subgrade. So the materials used include blind ditch pipes and geomembrane. Blind ditch pipes are arranged below the geomembrane to block the infiltration of groundwater, while the geomembrane ensures that the upper soil is not wetted by water. For construction, different terrain conditions have quite different construction methods, all of which need to be carried out according to different geological conditions.
The application of geomembrane in road construction can be said to be relatively common. As far as expressways are concerned, the common median strip adopts a drainage structure of blind ditch plus geomembrane. Its function is to prevent excess water from being discharged along the drainage network when we water the median greening. On both sides of the highway, the drainage channels we see actually have geomembrane laid on the bottom layer, while laying geomembrane on the slope has two functions. One is to prevent water on the hillside from flowing into the subgrade, and the other function is that when it rains, water flow can be drained away through the drainage ditch.
The application of geomembrane in roads usually has specific design and construction plans, requiring strict control of various links to improve its usability and functionality.
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