Study on the Operation Safety Evaluation System of Ship Lock Combined with Variation Coefficient Method and Matter-Element Extension Method

Abstract

Ship lock is the most widely used, the most promising and the most important type of navigation structure in the world at present. It is extremely necessary to evaluate the operation safety of ship lock in service, which has great social and economic benefits. The construction of safety evaluation system is the key step of safety evaluation of ship lock operation. Based on this, this paper systematically studies the evaluation system of ship lock operation safety, including indicator system, weighting method and evaluation model. The main work and conclusions are as follows: Firstly, a multi-indicator hierarchical indicator system including five first-class indicators and forty-seven second-class indicators for the safety evaluation of ship lock operation is established, and four safety evaluation grades of normal, deterioration, early warning and shutdown are divided. Secondly, the process and model of ship lock operation safety evaluation based on extension theory are put forward. Finally, the evaluation result shows that operation safety grade of ship lock belongs to the first grade – normal state, it is consistent with actual situation, indicating that the evaluation system is reliable. At the same time, the method can also be applied to other fields such as dam health evaluation, dam aging evaluation and rock mass quality evaluation, which provides a basis for safety evaluation.