【摘要】 海底盾构隧道长期承受较高水压，一旦发生破坏修复难度很大，因此需要严格的安全评价指标对海底隧道结构韧性安全性能进行评估。本文针对海底隧道结构韧性安全评价指标体系和评价方法展开研究：首先通过考虑海底盾构隧道的承载性能和使用性能，构建其结构韧性安全性能指标体系；其次，基于可拓云模型建立了韧性评价方法，并进行敏感性分析以检验模型的稳健性和可靠性。最后，将该方法应用于青岛胶州湾第二海底隧道工程，得到与预期结果相一致的评价等级。因此，本研究提出的韧性安全评价指标体系和评价方法，可为海底隧道的安全建设和运营提供重要参考价值。更多还原

【Abstract】 Subsea shield tunnels are subjected to high water pressure for a long time, and it is very difficult to repair once the tunnels are damaged.Therefore, strict safety evaluation indexes are needed to evaluate the toughness safety performance of the subsea tunnel structure.In this paper, the toughness safety evaluation index system and evaluation method of subsea tunnel structure are studied.Firstly, the toughness safety performance index system of subsea shield tunnels is constructed by considering the bearing performance and service performance.Secondly, a toughness evaluation method is established based on the extension cloud model, and sensitivity analysis is carried out to test the robustness and reliability of the model.Finally, the method is applied to Qingdao Jiaozhou Bay Second Subsea Tunnel, and the evaluation grade is consistent with the expected results.Therefore, the toughness safety evaluation index system and evaluation method proposed in this study can provide important reference value for the safe construction and operation of the subsea tunnels.更多还原