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Abstract With the introduction of fuzzy mathematics into rock slope stability analysis，many research results have been achieved. But the subjective consciousness of evaluation expert influences the evaluation results much too great. The covering surface is incomplete，and that the pertinence of evaluation to rock slope is not enough is already existed. Based on introducing rockmass quality classification method and unloading rockmass mechanics to the fuzzy evaluation system，a kind of fuzzy evaluation method of slope stability based on finite element analysis is proposed. This method has already increased and modified the judgment factors，meanwhile，through analyzing the calculation results of finite element model，it can select some contrastive relationships of influence factors quantitatively. Dealing with some factors in quantification，it determines the weight ratio so as to reduce the subjective deviation during the expert scoring. Combined with specific engineering example to check analysis，the actual operation of this method is much better. It has much more pertinence for analysis of rock slope，and it can make much more factors which will influence slope stability to judge the rock slope stability.
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Received: 23 April 2007
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