Stability evaluation of soil sites based on fuzzy analytic hierarchy process

Abstract

In order to accurately evaluate the stability of the present situation of the soil site, considering that the stability of the soil site is affected by its own structural characteristics and the external environment, the multiple factors affecting the stability of the soil site are determined, and the stability evaluation system of the soil site is constructed. The evaluation system is divided into three levels: target level, three primary levels and fifteen secondary levels, and four evaluation levels. Firstly, the weight value of the soil site stability evaluation index was determined by AHP, and the rationality of the evaluation index was verified by consistency test. Based on the expert experience and two kinds of ridge type membership functions, the fuzzy comprehensive evaluation model of soil site stability at three levels and two stages was established. Finally, combined with the analysis of engineering examples, it is shown that the fuzzy analytic hierarchy process is an effective method for the stability evaluation of soil sites, which can not only achieve the dual goals of safety, reliability and economic rationality, but also provide a basis for the selection of soil site disease control schemes.