Evaluation of seismic stability of rock slopes is the important foundation for prevention of seismic unstability of rock and soil slopes. In view of the multi-source and fuzzy characteristics in evaluation process

by using engineering variable fuzzy set theory for reference

fuzzy variable evaluation model is applied to evaluate the seismic stability of rock slopes. First

by comprehensive consideration of the rock slopes internal structure and external natural conditions

six parameters including the characteristics of the geotechnical body

the characteristics of the neotectonics

slope height

slope angle

the annual average precipitation

site seismic intensity are selected as the indices for evaluation index system and established rating standard

then the weights of evaluation factors in the model are obtained from the index practical data discreteness by using improved entropy weight method; finally

by changing the fuzzy variable evaluation model parameters to evaluated seismic stability of rock slopes by linear and nonlinear

and obtained stability level by mean value. The method has been applied to natural slope and cutting slope instances. The results show that the fuzzy variable evaluation model results are reasonable and objective; and they have better reliability and stability so as to provide a new research method and idea for seismic stability of rock slopes.