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Abstract Taking abutment slope of the Dagangshan as an example，the safety factor of the slope is calculated by overall and local reduction deformation modulus，cohesion and internal friction angle of different rocks，and the contribution for the specific slope stability at different parameters in different locations are obtained，which applied to evaluating system after the quantization process. The weight distribution is scientifically calibrated for parameters of the different rocks and on this basis the membership of the slope body comprehensive mechanical parameters is determined. According to the requirements of the Code，with safety factors of 1.30，1.175 and 1.05 for boundary，the grading standards of the different parameters of the specific projects are given；on that basis，the stable levels within different parameters in different rocks are determined. Combined with area ratio among the analysis area，the membership grade matrix revised by the comprehensive contribution of different rocks and the different parameters are obtained. The method precisely deals with the fuzzy parts of the comprehensive evaluation system based on the finite element method(FEM) calculation，weakens the uncertain effects caused by subjective factors in the four major evaluation segments of weight distribution，determine the membership grade，grading standards，and comprehensive mechanical parameters of slope，which is more targeted to engineering and results are more scientific and reasonable compared to experience.
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Received: 28 May 2013
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2014, Vol. 33 
