Application Of Set Pair Analysis On Rock And Soli Slope Stability Evaluation Based On Combination Weighting Game Theory

The stability of rock slope is affected by natural and human that has thecharacteristics multidimensional, nonlinearity and lack of samples. There are greathidden dangers to the safety of people’s life and property. It is an urgent need toaccurately evaluate the stability of rock slope. Project risk analysis theory is basedon the slope engineering in various uncertainty factors, considering the instabilityprobability and loss probability, is a new research direction of the slope engineeringstability evaluation and methods. Because it’s still in developing stage, theapplication in the geotechnical engineering field completely still has a lot ofdifficulties. This article is based on the scientific research project of human provincedepartment of education "theory and application research on risk analysis of slopeengineering (12C0366)" as the foundation, in-depth studied the risk of rock slopestability analysis.1. Systematic analyzed the research and application of engineering risk analysistheory, expounded risk identification, risk analysis, risk assessment, risk controlconcept, and summarized the methods commonly used in each stage. Reviewed andanalyzed the research status on slope engineering risk analysis at home and abroad.Summarized and analyzed the slope stability evaluation methods commonly used,and pointed out the use of methods and their advantages and disadvantages.2. Based on a detailed study of the related literature, and analyzed the influencefactors of rock slope stability. Starting from the slope geological factors and externalfactors, analyzes the role mechanism of various factors on the stability of rock andsoil slopes and their characteristics. By comprehensively considering the variousfactors affected the rock slopes, seven parameters including the characteristics ofSlope height, slope angle, slip surface angle, cohesion, internal friction angle, rockmechanics classification, seismic intensity are selected as the indexes for evaluationand established the level of evaluation standard. 3In view of multiple uncertainty factors influencing the slope stability, the setpair analysis evaluation model based on combination weighting game theory isproposed. It avoids the one-sidedness of single weight method to use the gametheory optimization model combine the subjective and objective weights, which arecalculated by the analytic hierarchy process and entropy method respectively. Thenthe sets connection degree can be calculated by analysis the identity, discrepancy andcontradiction of the simple characteristics in set pair analysis. Finally, the level ofslope stability can be identified by the confidence criterion (λ=0.6). Cases studyshow that the evaluation results are agree well with the grey correlation analysis andextension evaluation, proved that this method is feasible to estimate slope stability.