Ecological Highway Design Concept And Implementation

With the development of economy, highway is increasingly constructed. The environment problems of highway construction are gradually to be paid attention to by people, settling environment problems is the urgent affairs to highway constructionc Firstly , according to the correlation of highway and environment, this article analyzes the characteristic of environment impact of highway. On the base of the sustainable development and ecology, this article defines the concept and connotation of ecological highway and proposes the process and frame in ecological highway design. According to the object of ecological highway design, this article analyzes the highway design and highway life cycle assessment, and introduces environment impact factor to highway design. Scheme is to be chosen by gray relational grade model, the means of determining the weight of environment impact according to impact consequence, this means give prominence to environment impact to different schemes. This method is applied to scheme decision in Laoyukou-Huaishuguan of Xi'an-HanZhong expressway. Besides, the article analyzes environmental compensation design, discusses the highway environment design, such as side slop protection design, animal passage design, planting design and so on, in order to reduce highway environment impact further.