Research For Application Of Highway Slope Biotechnique In North-West China

Slope protection technology and stability analysis are important factors for highways construction. The traditional slope protection methods, for instance, dry-stone and cement-stone building destroy existing plant cover and are harmful to the environmental protection. And it may leads to impracticable structure and coast risks in the rainy and efflorescence areas. In recent years planting slope protection are principal ways used in Europe, America and Japan. As the development of highway construction in our country planting slope protection methods are used more popular than before. But it is seldom used in north-west area.The article makes the feasibility study of slope biotechnique utilized in north-west china based on the construction experience and natural environment, geological & physiognomical conditions of Baotou-Dongsheng Section of 210 National Highway in Inner-Mongolia. The article summarizes the slope stability analyzed method and research status. The article introduces the advantage of slope biotechnique and analyses the mechanism of slope biotechnique by means of mechanics. The article dissertates the relationship between raining and slope stability and simulates its effect by decreasing strength. Finally, the slope of the representative section of Baotou-Dongsheng Highway is protected by means of planting. Considering the effect of raining, the stability of sand or soil slope is analyzed by the finite element simulation method. The slope deformation, rock soil stress distribution, latency slope-slide position and safety factor are all calculated to provide a theoretical basis for the planting slope protection technology used in north-west china.