Double Layer Decision Making Model of Subgrade Slope Construction Scheme

The decision-making of slope construction scheme is a systematic combination decision-making. The selection of filling material, slope protection method and slope rate interact with each other, so independent selection is not appropriate. In order to solve the problems of flexible combination and various alternatives of expressway slope construction, a double-layer decision-making model based on attribute hierarchy model (AHM)and technique for order preference by similarity to an ideal solution (TOPSIS) was proposed. Each single scheme problem was considered as an overall combination scheme, so that more practical decision-making results could be obtained. Based on the Zhoukou Nanyang expressway project, a two-level decision-making model was established, and the most suitable scheme was selected in terms of safety, economy and environmental protection, representing the effectiveness of this method in multi combination scheme decision-making.