Study On Ecological Greening For Expressway In Gansu

With high-development in expressway construction and expanding attentions to environment, the preservation of ecology and recovery techniques of high-level highway environment have been attached great importance by the society.Based on the restoration ecology thesis, the different greening types of expressways are put forward that combined with the guidance of expressway greening choice and the investigation for expressway greening in Ganshu province.Analyzing the functions, effects, basic demand, principles, protection techniques of greening in different areas on expressway (slope, central median, interchange area, service area, and toll station) and the natural environment in Ganshu province, the vegetation choice in the south, the middle, the east and the west of Ganshu province are put forward.The expressway greening type in loess area is studied by analyzing the interchange trial greening area that G312 (from Miankou to Liugouhe) expressway intersects G109 (from Lanzhou to Haishiwan). The problems of expressway greening in Ganshu province are also studied, and some solved methods are put forward. The research in this paper is contributed to high-level highway ecological greening in acrid and semi-acrid.