Abstract: In view of the incompatibility and relevance among indexes of safety evaluation for sluice project, four-tuple connection number is incorporated into matter-element model to comprehensively evaluate sluice safety. The basic principle and modeling method are expounded. A method for calculating the connection number of single index based on linear interpolation principle is proposed. Using the evaluation model, the safety status of a sluice structure is depicted comprehensively from three aspects including similarity, difference and inverse. The safety level is appraised and the development trend of the sluice project is evaluated based on the connection trend theory. On this basis, guiding suggestions are put forward for the operation, maintenance and management of the sluice. Computational example manifests that the evaluation model is simpler and more reliable than traditional matter-element analysis method.

Key words: sluice project, safety evaluation, four-tuple connection number, matter-element model, connection trend