基于T-S模糊故障树理论的公路隧道冻害分析方法

Method for analyzing the highway tunnel freeze injury based on the T-S fuzzy fault tree theory

提出一种新的基于故障树理论的公路隧道冻害分析方法,以隧道冻害发生为初始事件,以隧道衬砌漏水结冰、路面溢水结冰、衬砌剥落掉块为后续事件,建立隧道冻害故障树,采用T-S模糊故障树计算方法对各底事件的重要度进行分析.结果表明:防水层破损、注浆堵水层失效、地下水侵入是导致隧道衬砌漏水结冰的关键问题;围岩中地下水丰富、排水设计施工不当、排水沟结冰冻胀是造成隧道路面溢水结冰的主要原因;衬砌施工质量不合格和衬砌原材料质量不合格是造成隧道衬砌剥落掉块的重要因素.因此,在寒区公路隧道设计和施工中一定要重视防排水工作,同时需要加强对衬砌材料劣化和材料耐久性的研究.

Based on the fault tree theory, a new method for analyzing the highway tunnel freeze injury is presented, which takes the tunnel freeze injury as the initial event, and takes water leakage and icing of the lining, water emitting and icing of road surface, flaking off of the lining as the following events, then establishes the tunnel freeze injury fault tree, and analyzes the importance of every bottom event by using the T-S fuzzy fault tree computational method. Taking water leakage and icing of the lining as examples, the paper analyzes the highway tunnel freeze injury by utilizing the method, and the re- sult shows that the damage of waterproof layer, the failure of grouting and plugging water layer, the groundwater are the key problems which cause water leakage and icing of lining. The substandard quality of lining construction and the raw material are the important factors which lead to the flaking off of the lining. Therefore, during the design and the construction of highway tunnel in cold areas, waterproof and drainage must he emphasized, and the lining material deterioration and the material durability should be also researched.