Abstract: Current evaluation methods for the safety situation of sluice are susceptible to subjectivity, and by most of them the interactions between certainty factors and uncertainty factors are hard to be fully considered. On the basis of constructing a multi-level evaluation index system of sluice safety, the connection number and set pair trend in the theory of set pair analysis are introduced into the safety evaluation. Through combinatorial weighting of subjective and objective indicators, the safety situation and development trend of sluice operation can be evaluated in qualitative and quantitative senses. A practical case study verifies the feasibility and effectiveness of the proposed method.

Key words: sluice engineering, safety situation, comprehensive evaluation, multiple connection number, set pair analysis, combinatorial weighting