Experimental Study on the Use of Highway Tunnel Spoil as Artificial Wetland Fill

In view of the large amount tunnel slag in mountainous areas and difficulty selecting sites for sites, an experimental study on use as substrate filler artificial wetlands was conducted section G8513 Pingliang-Mianyang National Highway from Wudu to Jiuzhaigou (Gan-Chuan border). Based support effect wetland plants provision surface microorganisms grow, modified further reduce concentration total phosphorus ammonia nitrogen water bodies through adsorption. This makes full value a resource, eliminates negative environmental impact traditional treatment, also alleviates eutrophication problem caused by excessive body at same time.