根据路基施工在不同阶段对高速公路路域生态环境的不同影响特点,将坝上地区高速公路路域生态环境分为3种状况;利用耦合层次分析法和逼近理想点法,将高速公路路域生态环境原始状况视为最理想状况,提出了路基施工对高速公路路域生态环境影响评价的7个等级,评价了坝上路基施工对高速公路路域生态环境的影响及生态恢复效果。 According to the different influence of embankment construction on the ecological environment of expressway roadbed in different stages, the ecological environment of freeway roadbed in dam area is divided into three kinds of conditions; using the coupled analytic hierarchy process and the approach of approximation ideal point, The original condition of ecological environment was regarded as the most ideal condition. Seven levels were proposed to evaluate the impact of embankment construction on expressway ecological environment. The impact of subgrade construction on the ecological environment of expressway and the ecological restoration effect were evaluated.